An integrated screen device for a connector cable

Abstract

The utility model relates to a connector cable's integral type screen device, including PCB and N column pad area that distributes on its width direction, N is integer and is equal to or more than 1, each column pad area is by two or more than two pad areas that are spaced apart in front and back in the length direction of PCB, is equipped with signal pad and ground pad in each pad area, is respectively used for with cable front end leading out signal conductor and ground wire welding, characterized by still including integral type metal shield, the integral type metal shield includes a top cover and the N+1 parallel rail that fixes in the top cover lower part, these rail separates out has with N column pad area one to one correspondence N grid, every column pad area and the cable front end that connects to each pad area on it is located in the corresponding grid, and every rail bottom is equipped with upper positioning structure, and the lower positioning structure that is equipped with on the PCB and communicates its ground layer is used for with upper positioning structure cooperation fixed. The utility model assembles conveniently and material cost is lower.

Description

Technical Field

[0001] This utility model relates to an integrated screen device for connector cables. Background Technology

[0002] In the known communications industry, multi-channel high-speed connectors typically have multiple rows of pads distributed along the width of the PCB inside the housing. Each row of pads consists of two or more pads spaced apart along the length of the PCB, each used to connect cables. After the outer sheath, aluminum foil, and insulation layer are cut off at the cable's end, a signal conductor (copper wire) is led out and soldered to the signal pads in each pad area. Meanwhile, a ground wire is led out from the aluminum foil and soldered to the ground pads in each pad area.

[0003] Because the aluminum foil, which serves as the signal shield, is cut open, the electromagnetic signals radiating outward from the signal conductor lack obstruction, leading to significant crosstalk between cables. Furthermore, current PCB manufacturing typically employs a symmetrical fan-out design, where all vias are symmetrical and equally spaced. This causes magnetic field induction in adjacent signal conductors when current flows through them, further amplifying crosstalk.

[0004] To reduce crosstalk, the conventional solution is to install shielding devices on the PCB. However, existing shielding devices have the following drawbacks: 1. Independent shielding devices are often used, each corresponding to a solder pad area. During production, they need to be aligned and assembled one by one, which makes the assembly process more complicated and the material cost higher.

[0005] 2. For PCBs with a large number of pads, due to the limitations of the PCB board surface and the fixed specifications of the shielding device, it is often difficult to install multiple shielding devices at the same time without causing interference, which also brings trouble to production and assembly. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing shielding grounding devices mentioned in the background art by providing an integrated shielding device for connector cables that is easy to assemble and has low material costs.

[0007] The technical solution of this utility model is: an integrated screen device for connector cables, including a PCB and N columns of pad areas distributed along the width direction of the PCB, where N is an integer and ≥1. Each column of pad areas consists of two or more pad areas distributed at intervals along the length direction of the PCB. Each pad area is provided with a signal pad and a ground pad, which are used for soldering to the signal conductor and ground wire led out from the front end of the cable, respectively. The feature is that it also includes an integrated metal shield, which includes a top cover and N+1 parallel partitions fixed to the lower part of the top cover. These partitions are divided into N slots corresponding one-to-one with the N columns of pad areas. Each column of pad areas and the front end of the cable connected to each of its pad areas are located in the corresponding slot. Each partition has an upper positioning structure at the bottom, and the PCB has a lower positioning structure connected to the ground layer for fixing in cooperation with the upper positioning structure.

[0008] Furthermore, in this utility model, the upper positioning structure is a fisheye foot, while the lower positioning structure is a grounding through hole for the fisheye foot to be inserted and fixed.

[0009] Furthermore, the cable described in this utility model is a differential signal cable, with a pair of signal conductors leading out from its front end, and a pair of signal pads correspondingly provided in the pad area, which are soldered to the same pair of signal conductors respectively.

[0010] Furthermore, in this utility model, a pair of grounding wires are led out from the front end of the cable, and a pair of grounding pads are correspondingly provided in the pad area, which are welded to the same pair of grounding wires respectively.

[0011] Furthermore, in each row of pad areas described in this utility model, the rear end of the cable connecting the front pad area passes over the cable connecting the rear pad area from above.

[0012] Furthermore, in this invention, N=4, and the number of pad areas in each row of pad areas is two.

[0013] The advantages of adopting the technical solution of this utility model are as follows: 1. In this utility model, an integrated metal shielding cover is set to replace the original independent shielding device. This integrated metal shielding cover has multiple partitions, which can complete the shielding and blocking of multiple adjacent pad areas and their cables in the PCB width direction at one time. There is no need to install independent shielding devices at the front end of each cable. Therefore, the assembly is faster and more efficient, and the material cost is also lower.

[0014] 2. This utility model features an integrated metal shielding cover, which uses partitions to create slots, forming a separate shielding cavity at the front end of each cable, thereby effectively preventing signal crosstalk between adjacent cables. Furthermore, the integrated metal shielding cover itself is grounded, and its fixing and grounding are simultaneously achieved through the fisheye feet at the bottom of the partitions and the grounding vias on the PCB, thus completing the ground loop coverage of each individual shielding cavity in one go. This facilitates assembly and improves assembly efficiency.

[0015] 3. The present invention features an integrated metal shielding cover, which, compared to the current independent shielding devices that are separately installed on the cables, does not cause interference problems between adjacent installations and can make full use of the PCB board space.

[0016] The objectives, advantages, and features of this utility model will be illustrated and explained through the following non-limiting description of preferred embodiments, which are given by way of example only with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall isometric three-dimensional structure of this utility model; Figure 2 for Figure 1 A schematic diagram of the forward-facing three-dimensional structure; Figure 3 for Figure 1 Axonometric 3D structural diagram after removing the metal shielding cover; Figure 4 for Figure 1 A top view of the PCB board (chip components omitted); Figure 5 for Figure 4 A schematic diagram of the isometric three-dimensional structure; Figure 6 for Figure 1 A schematic diagram of the isometric three-dimensional structure of the metal shielding cover; Figure 7 for Figure 6 A schematic diagram of the inverted three-dimensional structure.

[0018] In the diagram: 1. PCB; 101. Grounding via; 2. Signal pad; 3. Grounding pad; 4. Cable; 5. Signal conductor; 6. Grounding wire; 7. Integrated metal shield; 701. Top cover; 702. Barrier; 702a. Fisheye foot; A. Pad area; B. Grid. Detailed Implementation

[0019] Example: The following is combined with Figures 1-7 The specific implementation of the integrated shielding device for connector cables provided by this utility model is described below: Similar to conventional technology, this embodiment includes a PCB 1 with gold fingers at the front, control components such as chips soldered to the middle surface, and a cable connection area at the rear. Four rows of pad areas A are distributed along the width of the PCB 1 in this cable connection area. Each row of pad areas A consists of two pad areas A spaced apart along the length of the PCB 1, and each pad area A is used to connect a corresponding cable 4. Looking at the length of the PCB 1, there are two rows of pad areas A, with four pad areas A arranged side-by-side in each row. Figure 4 and Figure 5 As shown.

[0020] In this embodiment, the cable 4 is a conventional differential signal cable, with a pair of signal conductors 5 and a pair of ground wires 6 leading out from its front end. Each pad area A has a corresponding pair of signal pads 2, used for soldering to the pair of signal conductors 5 of the cable 4. Simultaneously, each pad area A also has a pair of ground pads 3 located outside the pair of signal pads 2, used for soldering to the pair of ground wires 6 of the cable 4. Figures 1-3 As shown.

[0021] The core improvements of this utility model are as follows: It also includes an integrated metal shield 7, which includes a top cover 701 and five parallel partitions 702 fixed to the lower part of the top cover 701. These partitions 702 divide the space into four slots B corresponding to the four rows of pad areas A. Each row of pad areas A and the front end of the cable 4 connected to each of its pad areas A are located in the corresponding slot B. Each partition 702 has a fisheye foot 702a at its bottom, and the PCB1 has a grounding via 101 for inserting and fixing the fisheye foot 702a. Figure 6 and Figure 7 As shown.

[0022] Furthermore, in this embodiment, within each column of pad areas A, the rear end of the cable 4 connecting the front pad area A passes over the cable 4 connecting the rear pad area A from above, such as... Figure 3 As shown.

[0023] The feature of this utility model is that it sets up an integrated metal shielding cover 7 to replace the original independent shielding device. This integrated metal shielding cover 7 has multiple partitions 702, which can complete the shielding and blocking of multiple adjacent pad areas A and their cables 4 in the width direction of PCB1 at one time. There is no need to install independent shielding devices at the front end of each cable 4. Therefore, the assembly is faster and more efficient, and the material cost is also lower.

[0024] Furthermore, the integrated metal shield 7 is divided into slots B by the partition 702, which can form an individual shield cavity at the front end of each cable 4, thereby effectively avoiding signal crosstalk between adjacent cables 4; and the integrated metal shield 7 is grounded itself, and is fixed and grounded simultaneously by the fisheye foot 702a at the bottom of the partition 702 and the grounding via 101 on the PCB1, thus completing the ground loop coverage of each individual shield cavity at one time, which is convenient for assembly and can improve assembly efficiency.

[0025] Furthermore, the integrated metal shield 7, compared to the independent shielding devices currently installed separately on the cable 4, does not cause interference problems between adjacent installations and can make full use of the board space of PCB1.

[0026] Of course, the above are merely specific application examples of this utility model and do not constitute any limitation on the scope of protection of this utility model. In addition to the above embodiments, this utility model may have other implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. An integrated screen device for connector cables, comprising a PCB (1) and N columns of pad areas (A) distributed along the width direction of the PCB (1), where N is an integer and ≥1, each column of pad areas (A) is composed of two or more pad areas (A) spaced apart along the length direction of the PCB (1), and each pad area (A) is provided with a signal pad (2) and a ground pad (3), which are respectively used for soldering to the signal conductor (5) and ground wire (6) led out from the front end of the cable (4); characterized in that It also includes an integrated metal shield (7), which includes a top cover (701) and N+1 parallel partitions (702) fixed to the bottom of the top cover (701). These partitions (702) are divided into N slots (B) corresponding to N columns of pad areas (A). The front ends of each column of pad area (A) and the cables (4) connected to each of its pad areas (A) are located in the corresponding slots (B). Each partition (702) has an upper positioning structure at the bottom, and the PCB (1) has a lower positioning structure connected to its ground layer for fixing in conjunction with the upper positioning structure.

2. The integrated screen device for connector cables according to claim 1, characterized in that... The upper positioning structure is a fisheye foot (702a), and the lower positioning structure is a grounding via (101) for the fisheye foot (702a) to be inserted and fixed.

3. The integrated screen device for connector cables according to claim 1, characterized in that: The cable (4) is a differential signal cable, with a pair of signal conductors (5) leading out from its front end, and a pair of signal pads (2) are provided in the pad area (A) respectively, which are soldered to the same pair of signal conductors (5).

4. The integrated screen device for connector cables according to claim 3, characterized in that: A pair of grounding wires (6) are led out from the front end of the cable (4), and a pair of grounding pads (3) are provided in the pad area (A) respectively, which are welded to the same pair of grounding wires (6).

5. An integrated screen device for connector cables according to claim 1, 3, or 4, characterized in that: Within each row of pad areas (A), the rear end of the cable (4) connecting the front pad area (A) passes over the cable (4) connecting the rear pad area (A) from above.

6. An integrated screen device for connector cables according to claim 1, 3, or 4, characterized in that: The N=4, and the number of pad areas (A) in each column of pad areas (A) is two.

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