A core wire shielding layer and metal part common level device

Abstract

The application discloses a kind of core wire shielding layer and metal part co-level device, including core wire and shielding assembly, the outer surface of core wire is covered with core wire shielding layer, first shielding piece includes shielding piece body, right side comb tooth is arranged on the right side splicing surface of shielding piece body, and right side tooth slot is formed between two adjacent right side comb tooth, left side comb tooth is arranged on the left side splicing surface of shielding piece body, and left side tooth slot is formed between two adjacent left side comb tooth, left side comb tooth and right side comb tooth are staggered in the extension direction of shielding piece body, and left side comb tooth is located in corresponding right side tooth slot, right side comb tooth is located in corresponding left side tooth slot.The beneficial effects of the present application are: by shrinking the first shielding piece, the reliability of the contact between the core wire shielding layer and the shielding piece can be ensured, and the shielding effect of the co-level device is good, and the transmission signal crosstalk index of the transmission link of 112Gbps and above can still meet the requirements.

Description

Technical Field

[0001] This invention relates to high-speed connectors, and more particularly to a device for common-level connection between the core wire shielding layer and the metal components. Background Technology

[0002] As data rates evolve towards 112G PAM4 and above, the disadvantages of PCBs as a high-speed signal transmission medium become increasingly apparent. High-speed cables will become the core and standard feature of high-speed switch designs. The interior of a switch may no longer be a PCB riddled with traces, but rather a "new form" of computing node composed of ASICs, high-speed connectors, and neat bundles of high-speed cables. The complete and reliable overlap between the high-speed cable's tail shielding layer and the metal shielding component has a crucial impact on the signal integrity of the transmission link. Any misalignment of the shielding component with the radial cross-section of the high-speed differential cable's shielding layer in any direction will lead to crosstalk resonance in the observed frequency band.

[0003] In existing technologies, signal transmission in high-speed cable modules with transmission links of 112Gbps and above requires ensuring the reliability of the P and N traces and the welding of the core conductors, as well as the impedance consistency of the welding area. Due to signal density limitations, cable modules often use high-speed cables without ground wires, and the common level of ground return current is mainly ensured by the reliable connection between the cable tail shielding layer and the metal shielding component. The conventional approach is to design structures such as "springs" or "rigid bulges" at the end of the shielding component to contact the cable shielding layer and achieve the connection between the two. Since the dimensional tolerance of high-speed cables fluctuates within ±0.1mm, unreliable connection occurs when the shielding component and cable shape exceed the limit tolerance, leading to crosstalk deterioration and abnormal signal transmission. Therefore, a reliable connection method between the core shielding layer and the metal shielding component is needed. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device for the core wire shielding layer and metal parts to share the same voltage level.

[0005] The objective of this invention is achieved through the following technical solution: a device for sharing a common voltage level between a core wire shielding layer and a metal component, comprising a core wire and a shielding assembly, wherein the outer surface of the core wire is covered with a core wire shielding layer, and the shielding assembly comprises a first shielding component, a second shielding component, and a third shielding component. The first shielding component includes a shielding component body with a ring-shaped cross-section. Several right-side comb teeth are provided on the right-side splicing surface of the shielding component body, spaced apart along the extending direction of the shielding component body, with a right-side groove formed between two adjacent right-side comb teeth. Several left-side comb teeth are provided on the left-side splicing surface of the shielding component body, spaced apart along the extending direction of the shielding component body, with a left-side groove formed between two adjacent left-side comb teeth. The left-side and right-side comb teeth are staggered along the extending direction of the shielding component body, with the left-side comb teeth located within corresponding right-side grooves and the right-side comb teeth located within corresponding left-side grooves. The second shield has a first front-end overlapping plate at its front end, and the third shield has a second front-end overlapping plate at its front end. There are two shields, the second and the third, which are respectively arranged opposite to each other. The first and second front-end overlapping plates are both located within the shield body. On the axial projection plane, there is an extrusion gap between the first front-end overlapping plate and the adjacent second front-end overlapping plate. The outer side wall of the first front-end overlapping plate and the outer side wall of the second front-end overlapping plate are in contact with the inner side wall of the shield body. The inner side wall of the first front-end overlapping plate and the inner side wall of the second front-end overlapping plate are in contact with the outer side wall of the core wire shielding layer.

[0006] Optionally, the left comb teeth are welded to the corresponding right comb teeth.

[0007] Optionally, the cross-section of the shielding component body is an oval ring, and both the left and right splicing surfaces are planar.

[0008] Optionally, the rear end of the second shielding member has a first rear end overlap plate, and the first rear end overlap plate is smoothly connected to the first front end overlap plate through a first transition connecting plate. The rear end of the third shielding member has a second rear end overlap plate, and the second rear end overlap plate is smoothly connected to the second front end overlap plate through a second transition connecting plate. The second rear end overlap plate overlaps with the first rear end overlap plate.

[0009] Optionally, the second rear end overlap plate and the first rear end overlap plate are flat plates, and the second rear end overlap plate and the first rear end overlap plate form a rectangular shielding cavity.

[0010] Optionally, an overlapping protrusion is provided on the left side wall of the first rear end overlapping plate, and overlapping grooves are provided on the upper and lower side walls of the second rear end overlapping plate, with the overlapping protrusion being engaged in the overlapping groove.

[0011] Optionally, the bottom of the lap groove is provided with an abutting protrusion, and the lap protrusion abuts against the abutting protrusion.

[0012] The present invention has the following advantages: the shielding component body of the present invention is wrapped around the radial periphery of the shielding layer; the cross-section of the comb-shaped shielding component is an waist-shaped ring with a gap with the shape of the high-speed cable, which facilitates the installation of the cable assembly; moreover, the comb teeth are distributed at the opening position of the shielding component, and the left and right sides can be riveted by special tooling. The complementary shape of these left and right sides of the comb teeth provides deformable space for the shielding component; moreover, the shielding component in the four directions of the core wire shielding layer is relatively free and has deformation space, which facilitates assembly. By shrinking, the reliability of the contact between the core wire shielding layer and the shielding component can be ensured, thereby making the shielding effect of the common level device good. In transmission links of 112Gbps and above, its transmission signal crosstalk index can still meet the requirements. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the first shielding component; Figure 2 This is a schematic diagram of the shielding component. Figure 3 A schematic diagram of the structure of the common-level device for the core wire shielding layer and metal parts. In the figure, 1-first shielding component, 2-second shielding component, 3-third shielding component, 4-cable shielding layer, 5-extrusion gap, 6-overlapping protrusion, 7-overlapping groove, 8-abutting protrusion, 11-left comb tooth, 12-right comb tooth, 13-left tooth groove, 14-right tooth groove, 15-left splicing surface, 16-right splicing surface, 21-first rear end overlapping plate, 22-first front end overlapping plate, 23-first transition connecting plate, 31-second rear end overlapping plate, 32-second front end overlapping plate, 33-second transition connecting plate. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0015] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other.

[0017] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0018] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0019] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] like Figure 3 As shown, a device for sharing a common voltage level between a core wire shielding layer 4 and a metal component includes a core wire and a shielding assembly. The outer surface of the core wire is covered with a core wire shielding layer 4. In this embodiment, as shown... Figure 2 As shown, the shielding assembly includes a first shielding component 1, a second shielding component 2, and a third shielding component 3. Further, as... Figure 1As shown, the first shielding component 1 includes a shielding component body with a ring-shaped cross-section. After peeling off the outer layer of the cable to expose the complete core wire shielding layer 4, the entire core wire and core wire shielding layer 4 can pass through the inner cavity of the shielding component body. In this embodiment, a plurality of right-side comb teeth 12 are provided on the right-side splicing surface 16 of the shielding component body. The right-side comb teeth 12 are spaced apart in the extending direction of the shielding component body. Furthermore, the extending direction of the shielding component body is axial, and a right-side tooth groove 14 is formed between two adjacent right-side comb teeth 12. A plurality of left-side comb teeth 11 are provided on the left-side splicing surface 15 of the shielding component body. The left-side comb teeth 11 are located on the shielding component body. The shielding components are spaced apart along the extension direction of the shielding body, and a left tooth groove 13 is formed between two adjacent left teeth 11. The left teeth 11 and right teeth 12 are staggered along the extension direction of the shielding body, with the left teeth 11 located in the corresponding right tooth groove 14 and the right teeth 12 located in the corresponding left tooth groove 13. When the left teeth 11 and right teeth 12 are not welded together, the shielding body can contract and expand in the annular direction under external force, which facilitates the installation and fixing of the core wire. In this embodiment, the front end of the second shielding component 2 has a first front end overlapping plate 22, and the front end of the third shielding component 3 has a second front end overlapping plate. 32. There are two shielding components, the second shielding component 2 and the third shielding component 3, which are respectively arranged opposite to each other. The first front end overlapping plate 22 and the second front end overlapping plate 32 are both located within the shielding component body. On the axial projection plane, there is a compression gap 5 between the first front end overlapping plate 22 and the adjacent second front end overlapping plate 32. Therefore, after the shielding component body is compressed, the shielding component body shrinks, thereby causing the inner cavity of the shielding component body to shrink. At this time, since there is a compression gap 5 between the first front end overlapping plate 22 and the adjacent second front end overlapping plate 32, the compression gap 5 can also adaptively shrink when the shielding component body shrinks, thereby pressing the core wire tightly. In this embodiment, After the core wire is securely installed in the shielding body, the left comb tooth 11 is welded to the corresponding right comb tooth 12. At this time, the gap between the left comb tooth 11 and the right comb tooth 12 is 0.2mm. After the core wire is installed, the outer side wall of the first front end lap plate 22 and the outer side wall of the second front end lap plate are attached to the inner side wall of the shielding body. The inner side wall of the first front end lap plate 22 and the inner side wall of the second front end lap plate are attached to the outer side wall of the core wire shielding layer 4. Therefore, the core wire shielding layer 4 is in contact with the shielding body on all four sides, avoiding crosstalk resonance in the observation frequency band caused by the non-lapping of the shielding body and the core wire shielding layer 4 in any direction of the radial section.

[0021] In this embodiment, as Figure 1 As shown, the cross-section of the shielding component body is a waist-shaped ring, and both the left splicing surface 15 and the right splicing surface 16 are planes. Therefore, in the natural state, the left splicing surface 15 and the right splicing surface 16 are on the same plane, which facilitates the welding of the left comb tooth 11 and the right comb tooth 12.

[0022] In this embodiment, as Figure 2 As shown, the rear end of the second shielding member 2 has a first rear end overlapping plate 21, which is smoothly connected to the first front end overlapping plate 22 via a first transition connecting plate 23. The rear end of the third shielding member 3 has a second rear end overlapping plate 31, which is smoothly connected to the second front end overlapping plate 32 via a second transition connecting plate 33. The second rear end overlapping plate 31 overlaps with the first rear end overlapping plate 21. Furthermore, the second rear end overlapping plate 31 and the first rear end overlapping plate 21 are flat plates, and the second rear end overlapping plate 31 and the first rear end overlapping plate 21 form a rectangular shielding cavity. In this embodiment, the left sidewall of the first rear end overlapping plate 21... The upper part is provided with a lap protrusion 6, and the upper and lower side walls of the second rear lap plate 31 are provided with lap grooves 7. The lap protrusion 6 is stuck in the lap groove 7. The bottom of the lap groove 7 is provided with an abutting protrusion 8. The lap protrusion 6 abuts against the abutting protrusion 8, thereby ensuring the reliability of the lap of the second shield 2 and the second shield 2. Therefore, in this embodiment, when the core wire is installed, the first shield 1, the second shield 2 and the third shield 3 constitute a shielding whole. The second shield 2 and the third shield 3 respectively contact the core wire shielding layer 4, realizing multiple point contacts and reliable lap of the core wire shielding layer 4 and the shield around the shield, thereby ensuring the reliability of the high-speed connector.

[0023] In this embodiment, the three shielding components of the connector form a free, four-sided suspended state at the core wire shielding layer 4, enclosing the cable shielding layer inside. The first shielding component 1 is wrapped around the outside of the core wire shielding layer 4 using a special riveting tool. The comb-like structure interlocks on both sides, and finally, laser welding seals and fixes the splicing surface. This connector is stable and reliable as a whole, effectively ensuring that the shielding components and the core wire shielding layer 4 overlap at multiple points and that the overlap state is stable. In transmission links of 112Gbps and above, its crosstalk index can still meet the requirements. Compared with the existing spring contact structure, the spring contact structure has a straight edge in the thickness direction of the high-speed cable, which can be achieved by the spring contact overlap structure in the width direction. The curved surface and small size of the cable make reliable contact impossible with the spring-loaded structure. The connection is achieved through an interference fit between the shielding component and the cable shielding layer. However, when there are extreme deviations between the cable's external dimensions and the U-shaped opening size inside the shielding component, the two may not overlap. In transmission links of 112Gbps and above, the crosstalk performance of the signal transmission cannot meet the requirements. Compared with the rigid convex structure, the external dimensions of high-speed cables below 112Gbps have larger tolerances. The external dimensions of commonly used 25#-32# cables are within ±0.1mm, and there are large batch-to-batch dimensional fluctuations. When the cable's external dimensions and the height of the rigid convex bulge of the shielding component have extreme tolerances, they may not overlap, leading to worsening crosstalk.

[0024] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for sharing a common voltage level between a core wire shielding layer and a metal component, characterized in that: It includes a core wire and a shielding assembly. The outer surface of the core wire is covered with a core wire shielding layer. The shielding assembly includes a first shielding component, a second shielding component, and a third shielding component. The first shielding component includes a shielding component body with a ring-shaped cross-section. A plurality of right-side comb teeth are provided on the right-side splicing surface of the shielding component body. These right-side comb teeth are spaced apart along the extending direction of the shielding component body, and a right-side groove is formed between two adjacent right-side comb teeth. A plurality of left-side comb teeth are provided on the left-side splicing surface of the shielding component body. These left-side comb teeth are spaced apart along the extending direction of the shielding component body, and a left-side groove is formed between two adjacent left-side comb teeth. The left-side and right-side comb teeth are staggered along the extending direction of the shielding component body, with each left-side comb tooth located within a corresponding right-side groove and each right-side comb tooth located within a corresponding left-side groove. The second shielding component has a first front-end overlapping plate at its front end, and the third shielding component has a second front-end overlapping plate at its front end. There are two shielding components, the second and the third, which are respectively arranged opposite to each other. The first front-end overlapping plate and the second front-end overlapping plate are both located within the shielding component body. On the axial projection plane, there is an extrusion gap between the first front-end overlapping plate and the adjacent second front-end overlapping plate. The outer sidewall of the first front-end overlapping plate and the outer sidewall of the second front-end overlapping plate are in contact with the inner sidewall of the shielding component body, and the inner sidewall of the first front-end overlapping plate and the inner sidewall of the second front-end overlapping plate are in contact with the outer sidewall of the core wire shielding layer.

2. The common-level device for the core wire shielding layer and metal parts according to claim 1, characterized in that: The left comb teeth are welded to the corresponding right comb teeth.

3. The common-level device for the core wire shielding layer and metal parts according to claim 2, characterized in that: The shielding component body has a waist-shaped cross-section, and both the left and right splicing surfaces are planar.

4. A common-level device for the core wire shielding layer and metal parts according to any one of claims 1 to 3, characterized in that: The second shielding member has a first rear end overlap plate at its rear end, and the first rear end overlap plate is smoothly connected to the first front end overlap plate through a first transition connecting plate. The third shielding member has a second rear end overlap plate at its rear end, and the second rear end overlap plate is smoothly connected to the second front end overlap plate through a second transition connecting plate. The second rear end overlap plate overlaps with the first rear end overlap plate.

5. The common-level device for the core wire shielding layer and metal parts according to claim 4, characterized in that: The second rear end overlap plate and the first rear end overlap plate are flat plates, and the second rear end overlap plate and the first rear end overlap plate form a rectangular shielding cavity.

6. The common-level device for the core wire shielding layer and metal parts according to claim 5, characterized in that: The first rear end overlapping plate has an overlapping protrusion on its left side wall, and the second rear end overlapping plate has overlapping grooves on its upper and lower side walls, with the overlapping protrusion being engaged in the overlapping groove.

7. A common-level device for the core wire shielding layer and metal parts according to claim 6, characterized in that: The bottom of the lap groove is provided with an abutting protrusion, and the lap protrusion abuts against the abutting protrusion.

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