Connection structure with high-frequency gain efficiency and processing method

Abstract

The invention discloses a connecting structure with high-frequency gain efficiency and a processing method. The connecting structure comprises a wiring board, the cable fixing piece comprises a cylinder body and a plug pin, one end of the plug pin is connected with the cylinder body, and the other end of the plug pin is plugged with the wiring board to form a grounding loop; the cable comprises a plastic layer, a shielding layer and a plurality of wiring terminals, the shielding layer is partially exposed out of the plastic layer, the barrel wraps the peripheral surface of the exposed part of the shielding layer and is in electric contact with the shielding layer, the wiring terminals penetrate through the barrel and are connected with the wiring board, and the barrel hoops the cable tightly. According to the invention, the cable holding member is arranged to be cylindrical, so that the cable holding member completely wraps the shielding layer and hoops the cables, the anti-crosstalk capability between the cables can be enhanced, the situation that the cables are stretched, twisted or bent when the connector is plugged or pulled for multiple times or improperly pulled can be prevented, and the service life of the connector is prolonged. Therefore, the lengths of the core wires among the cables are kept consistent, and the core wires are ensured not to generate transmission delay during high-frequency signal transmission.

Description

Technical Field

[0001] The present invention relates to the technical field of connectors, and in particular to a connection structure with high-frequency gain performance and a processing method thereof. Background Art

[0002] Currently, the high-speed cables used in the communications industry are all multi-channel products. Their head connectors are usually composed of a plug-in PCB board placed in an outer shell and multiple channel signal lines connected to it. The outer surface of these channel signal lines is cut off and the internal aluminum foil and insulation sheath are cut open in turn to expose the core wire conductor wrapped in the insulation sheath. The core wire conductor is then welded to the preset signal pads on the plug-in PCB board to complete the connection.

[0003] When existing cable pairs are connected to PCB boards, twisting is often used to offset the magnetic field effect generated by the cable lines. However, when two high-speed lines are twisted together, the arrangement of the high-speed line pairs will be uncontrolled, which requires the position of the high-speed line pairs to be adjusted when connected to the pads on the circuit board. This will cause the length of the high-speed line pairs to be mismatched, resulting in intra-pair skew between differential pair signals and inter-pair skew between two adjacent differential pair signals (e.g. Figure 1 as shown), thus affecting the characteristics of data transmission.

[0004] To address this problem, the patent (CN114498201B) provides a technical solution of wrapping and fixing the cables with insulating material by providing "a plurality of grounding conductors and a plurality of differential pairs arranged in parallel at fixed intervals" and "each differential pair is located between two adjacent grounding conductors" to avoid the phenomenon of unequal lengths caused by twisting multiple cables together. However, it still has the following disadvantages: 1. The shielding layer between the cables has weak anti-crosstalk capabilities; 2. This arrangement and fixing method may cause the cable core to fall off, poor contact, or stretching due to factors such as the number of times the connector is plugged in and out or improper pulling, causing the cable core to deform and change its length. This will cause the core to generate transmission delays for the same pair of signal sources or two adjacent pairs of signal sources when transmitting high-frequency signals, affecting the high-frequency and high-speed transmission performance of the signal. The present application proposes a connection structure and processing method that has high-frequency gain performance that simultaneously prevents crosstalk and transmission delay to address such problems. Summary of the Invention

[0005] Based on this, in order to solve the problems existing in the prior art, on the one hand, the present application provides a connection structure with high-frequency gain performance, including a wiring board;

[0006] A cable retainer, comprising a barrel and a plug pin, one end of the plug pin being connected to the barrel, and the other end of the plug pin being plugged into a wiring board and in contact with a ground loop layer of the wiring board;

[0007] The cable includes a plastic layer, a shielding layer, and a plurality of terminals. The shielding layer is partially exposed from the plastic layer. The barrel wraps around the outer circumference of the exposed shielding layer and forms electrical contact with the shielding layer. The terminals pass through the barrel and are connected to the terminal block. The barrel clamps the cable;

[0008] The cylinder is in the shape of a closed-loop cylinder, and an interference fit is formed between the cylinder and the outer wall of the shielding layer;

[0009] There are two plug-in pins, and the two plug-in pins are respectively located on both sides of the axis of the cylinder.

[0010] Furthermore, the connection points between the two plug-in pins and the cylinder are located in the middle of the outer wall of the cylinder, and the connecting line between the two plug-in pins and the cylinder is perpendicular to the axis of the cylinder.

[0011] Furthermore, the connection points between the two plug pins and the cylinder are respectively located at two ends of the cylinder, so that the two plug pins are arranged diagonally.

[0012] Furthermore, the wiring board is provided with a wiring portion, and the wiring portion is welded to the wiring terminal.

[0013] Furthermore, the wiring board is also provided with a socket, and the plug pins are plugged into the socket.

[0014] Furthermore, the plug pins are fisheye pins.

[0015] In another aspect, the present application provides a method for processing a connection structure having high-frequency gain performance. The method is used to process the connection structure, comprising:

[0016] Pass the terminal through the barrel of the cable holder so that the barrel is sleeved and completely wrapped around the outer circumference of the shielding layer, and then tighten the barrel so that the barrel is tightly clamped around the cable;

[0017] The plug pins are plugged into the terminal board;

[0018] Solder the pins and terminals separately.

[0019] Furthermore, the processing steps of the cable holder include:

[0020] The side walls of the cylinder are extruded to form the plug pins.

[0021] Beneficial effects: The present invention arranges the cable holder into a cylindrical shape so that the cable holder completely covers the shielding layer and tightens the cable. In addition to enhancing the anti-crosstalk capability between cables, it can also prevent the cables from stretching, twisting or bending when the connector is repeatedly plugged in and out or improperly pulled, so that the length of the core wires between the cables remains consistent, ensuring that the core wires will not cause transmission delays when the signal is transmitted at high frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0023] Figure 1 Schematic diagram of the delay difference within a differential pair and the delay difference between two adjacent differential pair signals;

[0024] Figure 2 This is a schematic diagram of the overall structure of the connection structure with high-frequency gain performance of the present invention;

[0025] Figure 3 This is a schematic diagram of the connection structure wiring board with high-frequency gain performance of the present invention;

[0026] Figure 4 This is a schematic diagram of the cable structure of the connection structure with high-frequency gain performance of the present invention;

[0027] Figure 5 A schematic diagram of the cable retainer structure of the connection structure with high-frequency gain performance of the present invention;

[0028] Figure 6 A schematic diagram of the plug-in pin structure of the connection structure with high-frequency gain performance of the present invention;

[0029] In the figure: 1. Terminal block; 11. Terminal portion; 12. Jack; 2. Cable holder; 21. Cylinder; 22. Notch; 23. Connector pin; 3. Cable; 31. Shielding layer; 32. Terminal; 33. Plastic layer.

[0030] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] like Figure 2-4 As shown, the embodiment of the present application provides a connection structure with high-frequency gain performance, including: a wiring board 1;

[0035] The cable holder 2 includes a barrel 21 and a plug pin 23. One end of the plug pin 23 is connected to the barrel 21, and the other end of the plug pin 23 is plugged into the terminal block 1 and contacts the ground loop layer of the terminal block 1 to form a ground loop.

[0036] At least one cable 3 is provided. The number of cable holders 2 is the same as the number of cables 3. The cable 3 includes a shielding layer 31, a plurality of terminal blocks 32, and a plastic layer 33. The shielding layer 31 partially protrudes from the plastic layer 33. The cylinder 21 is wrapped around the exposed portion of the shielding layer 31 to form an electrical contact with the shielding layer 21. The terminal blocks 32 pass through the cylinder 21 and are connected to the terminal block 1. The cylinder 21 tightens the cable 3.

[0037] In this embodiment, the wiring board 1 is a PCB board or other circuit board, the cable holder 2 is made of a conductive metal material, optionally, the cable holder 2 is made of copper, the cylinder 21 is in the shape of a closed cylinder, optionally, the cross-section of the cylinder 21 can also be a regular polygon or an ellipse, the cylinder 21 forms an interference fit with the outer wall of the shielding layer 21, when the number of cable holders 2 is two or more, the cable holders 2 are arranged in an interlaced manner, the number of the plug pins 23 is two, and the two plug pins 23 are respectively located on both sides of the axis of the cylinder 21 and contact the ground loop layer of the wiring board 1 to form a loop, and at least two core wires are provided inside the cable 3;

[0038] During installation, first insert the terminal 32 through the cable holder 2 so that the cable holder 2 is sleeved onto the outside of the shielding layer 31. Then tighten the barrel 21 to clamp the cable 3. At this time, the inner wall of the barrel 21 completely covers the exposed portion of the shielding layer 31.

[0039] When the cable 3 transmits data signals, the transmitted data signals need to reach the destination at the same time. However, due to different routing lengths or structures, the transmission time may be different, resulting in delays. The present invention configures the cable holder 2 into a cylindrical shape so that the cable holder 2 can completely cover the shielding layer 31 of the cable 3. In addition to enhancing the anti-crosstalk capability between the cables 3, the larger contact area and the tight grip of the cable holder 2 on the cable 3 make it less likely for the shielding layer 31 to fall off or have poor contact with the cable holder 2. The cable holder 2 tightly clamps the cable 3 to prevent the cable 3 from stretching, twisting, or bending when the cable 3 is repeatedly plugged and unplugged or improperly pulled in the connector. This prevents the cable 3 from deforming and changing its length, ensuring that the transmission distance between the cables 3 remains consistent and the cables are routed equidistantly. This allows the data signals to reach the destination at the same time when the signals are transmitted at high frequencies, without causing transmission delays. This avoids the delay difference within the differential pair and the delay difference between two adjacent differential pair signals, further ensuring the performance of high-frequency and high-speed signal transmission.

[0040] The cable holder 2 is configured as a single piece, which does not take up too much space and can be used on a smaller-sized wiring board 1;

[0041] Furthermore, the design of the cable holder 2 of the present invention can significantly enhance overall signal integrity, anti-interference capabilities, and system stability when processing high-speed signals (e.g., SERDES, LVDS, USB, Ethernet, RF, etc.), with the following specific advantages:

[0042] Provide shielded contacts and return paths to ensure the signal return current takes the shortest path, reducing radiation interference;

[0043] In differential pair transmission (such as LVDS and USB), a stable ground reference can maintain signal balance, reduce noise ingress, reduce signal jitter, and maintain signal symmetry;

[0044] It can help create a uniform impedance environment, making it easier to achieve 50Ω or 100Ω impedance requirements when paired with a multi-layer PCB, reducing reflections and signal ringing, and improving eye diagram clarity;

[0045] It can quickly conduct away static electricity or surges, protecting internal ICs from damage, extending equipment life, and reducing the chance of system failure.

[0046] In one embodiment, the cable holder 2 is formed by welding the plug pins 23 and the barrel 21 . In another embodiment, the plug pins 23 are integrally formed by stamping the barrel 21 , and the notch 22 is formed.

[0047] In this embodiment, the notch 22 is arc-shaped, and the arc length of the notch 22 is less than or equal to half the circumference of the cylinder 21 . The notch 22 is formed on the outer wall of the cylinder 21 to form a groove or penetrates the inner wall of the cylinder 21 .

[0048] In one embodiment, the wiring board 1 is provided with a wiring portion 11 , which is welded to the wiring terminal 32 . The wiring board 1 is also provided with a socket 12 , and the plug pin 23 is plugged into the socket 12 .

[0049] In this embodiment, during installation, the terminal 32 of the cable 3 is first passed through the cable holder 2 so that the cable holder 2 is sleeved on the shielding layer 31, and then the plug pin 23 is inserted into the jack 12, and then the plug pin 23 is welded to the terminal block 1 by wave soldering, manual soldering, etc.

[0050] like Figure 5 As shown, in one embodiment, the connection between the two plug pins 23 and the cylinder 21 is located in the middle of the outer wall of the cylinder 21, and the connecting line between the two plug pins 23 and the cylinder 21 is perpendicular to the axis of the cylinder 21; in another embodiment, the connection between the two plug pins 23 and the cylinder 21 is located at both ends of the cylinder 21, so that the two plug pins 23 are diagonally arranged.

[0051] In this embodiment, the terminal block 1 is provided with a socket 12 corresponding to the position of the plug pin 23. During installation, the plug pin 23 is inserted into the corresponding socket 12, and then the plug pin 23 is welded to the terminal block 1 by wave soldering, manual soldering, etc.

[0052] like Figure 6 As shown, in one embodiment, the plug pins 23 are fisheye pins.

[0053] In this embodiment, by adopting fisheye pins, the pins are directly mounted on the surface of the wiring board 1 without the need to open through holes, and the space occupied is small, which is suitable for high-density panel design.

[0054] The present invention provides a method for processing a connection structure having high-frequency gain performance. The method is used to process the connection structure in the above embodiment, including:

[0055] A plurality of jacks 12 arranged at intervals are provided on the wiring board 1;

[0056] Pass the terminal 32 through the barrel 21 of the cable holder 2 so that the barrel 21 is sleeved and completely wrapped around the outer circumference of the shielding layer 31, and then tighten the barrel 21 so that the barrel 21 is tightly wrapped around the cable 3;

[0057] Insert the plug pins 23 into the corresponding sockets 12 to temporarily secure the cable 3;

[0058] After the plug pin 23 is inserted into the socket 12, the connection between the plug pin 23 and the socket 12 is welded;

[0059] After the plug pins 23 and the sockets 12 are welded, the connection terminals 32 of the core wires of the cable 3 are welded to the connection portion 11 .

[0060] In this embodiment, the cable 3 is first tightened by the cylinder 21, and then the plug pin 23 and the socket 12 are welded. Compared with the processing method of the prior art, this avoids the situation in which the spacing between different cables 3 and the length of the core wires of the same cable 3 change during the welding process, resulting in intra-pair delay difference and inter-pair delay difference in the connection structure after processing.

[0061] In one embodiment, the processing steps of the cable holder 2 include:

[0062] The plug pins 23 are formed by extruding the side wall of the cylinder 21 .

[0063] In one embodiment, the processing steps of the cable holder 2 include:

[0064] The plug pins 23 are welded to both sides of the outer wall of the cylinder 21 .

[0065] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A connection structure with high-frequency gain performance, characterized in that: include: terminal blocks; A cable holder, the cable holder comprising a barrel and a plug pin, one end of the plug pin being connected to the barrel, the other end of the plug pin being plugged into the wiring board and contacting the ground loop layer of the wiring board to form a ground loop; A cable comprising a plastic layer, a shielding layer, and a plurality of terminals, wherein the shielding layer is partially exposed from the plastic layer, the barrel wraps around the outer circumference of the exposed portion of the shielding layer and forms electrical contact with the shielding layer, the terminals pass through the barrel and are connected to the terminal block, and the barrel clamps the cable; The cylinder is in the shape of a closed-loop cylinder, and forms an interference fit with the outer wall of the shielding layer; There are two plug-in pins, and the two plug-in pins are respectively located on both sides of the axis of the cylinder.

2. The connection structure with high-frequency gain performance according to claim 1, characterized in that: The connection points between the two plug pins and the cylinder are located in the middle of the outer wall of the cylinder, and the connecting line between the two plug pins and the cylinder is perpendicular to the axis of the cylinder.

3. The connection structure with high-frequency gain performance according to claim 1, wherein: The connection points between the two plug pins and the cylinder are respectively located at two ends of the cylinder, so that the two plug pins are arranged diagonally.

4. The connection structure with high-frequency gain performance according to claim 2 or 3, characterized in that: The wiring board is provided with a wiring portion, and the wiring portion is welded to the wiring terminal.

5. The connection structure with high-frequency gain performance according to claim 4, characterized in that: The wiring board is also provided with a socket, and the plug pins are plugged into the socket.

6. The connection structure with high-frequency gain performance according to claim 1, wherein: The plug pins are fisheye pins.

7. A method for processing a connection structure with high-frequency gain performance, characterized in that: The processing method is used to process the connection structure according to any one of claims 1 to 6, comprising: Pass the terminal through the barrel of the cable holder so that the barrel is sleeved and completely wrapped around the outer circumference of the shielding layer, and then tighten the barrel so that it clamps the cable tightly; The plug pins are plugged into the terminal board; Solder the pins and terminals separately.

8. The method for processing a connection structure with high-frequency gain performance according to claim 7, wherein: The processing steps of the cable holder include: The side walls of the cylinder are extruded to form the plug pins.

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