A high-speed cable assembly

Abstract

The present invention relates to a high-speed cable assembly, comprising: a shell, on which a plurality of mounting slots are provided, and the plurality of mounting slots are arranged in a row along the width direction of the shell; a shielded cable assembly, arranged in the corresponding mounting slots, the shielded cable assembly comprising a high-speed cable, a shielding shell and a contact, the contact being installed in the shielding shell through an insulator, the high-speed cable comprising a cable insulation layer, an inner conductor, a shielding layer and a shielding sheet riveted to the outside of the shielding layer, the front end of the high-speed cable is riveted to the shielding shell through the shielding sheet, and the inner conductor is connected to the terminal of the contact; a shielding buckle plate, buckled on the shell and covering all the shielding shells to achieve full enclosure shielding of each shielded cable assembly; the shielding buckle plate and each shielding shell form a shielding cavity at the front end of the high-speed cable assembly, and the contact end of the contact is cantilevered and arranged in the shielding cavity. The present invention achieves stable shielding performance of the high-speed cable and full enclosure shielding function for the high-speed cable and differential pairs.

Description

Technical Field

[0001] The present invention belongs to the technical field of high-speed connectors, and in particular relates to a high-speed cable assembly. Background Art

[0002] High-speed cable assemblies utilize a double-sided shielding structure to shield the high-speed cable and its connected contacts. However, this shielding coverage is limited, and the shielding structure's coverage fails to meet high-speed performance requirements. Inadequate shielding also hinders high-speed signal transmission. Furthermore, at the mating end of the high-speed cable assembly, shielding fails to effectively isolate adjacent pairs of high-speed signal contacts, hindering crosstalk control between adjacent differential pairs. Summary of the Invention

[0003] In order to solve the problems existing in the prior art, the present invention proposes a high-speed cable assembly, in which the shielding shell is riveted to the high-speed cable, the connection stability is stronger, and the shielding conductivity performance is stable. The shielding shell surrounds the contact piece and the part where the contact piece contacts the high-speed cable on three sides. After the shielding buckle plate is buckled, a fully enclosed shielding structure is formed, and the shielding effect is good.

[0004] The purpose of the present invention and the technical problem to be solved are achieved by adopting the following technical solutions. A high-speed cable assembly proposed in the present invention comprises:

[0005] A housing is provided with a plurality of mounting slots, wherein the plurality of mounting slots are arranged in a row along the width direction of the housing;

[0006] A plurality of shielded cable assemblies are arranged in a row, and the shielded cable assemblies are arranged in corresponding installation slots. The shielded cable assembly includes a high-speed cable, a shielding shell, and a contact. The contact is installed in the shielding shell through an insulator. The high-speed cable includes a cable insulation layer, an inner conductor arranged in the cable insulation layer, a shielding layer arranged outside the cable insulation layer, and a shielding sheet riveted to the outside of the shielding layer. The front end of the high-speed cable is riveted to the shielding shell through the shielding sheet, and the inner conductor is connected to the terminal of the contact.

[0007] The shielding buckle plate is buckled on the shell and covers all the shielding shells to achieve full shielding of each shielded cable assembly; the shielding buckle plate and each shielding shell form a shielding cavity at the front end of the high-speed cable assembly, the front end of the shielding cavity is open, and the contact end of the contact piece is cantilevered in the shielding cavity.

[0008] Furthermore, each insulator is provided with two contacts, which are arranged at a relative interval. The two contacts in the same insulator form a differential pair. Two inner conductors are arranged at a distance in the cable insulation layer, and the inner conductors are used to be welded to the terminal ends of the corresponding contacts.

[0009] Furthermore, the cable insulation layer in the high-speed cable is formed in one step, and the inner conductor is fixed in the cable insulation layer in the form of an insert.

[0010] Furthermore, the shielding shell has a U-shaped sheet structure, and the front end, the rear end and the top of the shielding shell are open, so that the shielding shell itself forms a U-shaped cavity.

[0011] Furthermore, positioning protrusions are symmetrically provided on both sides of the insulator, and positioning grooves corresponding to the positioning protrusions are opened on both sides of the shielding shell.

[0012] Furthermore, the shielding sheet includes a shielding sheet main body extending forward and backward, the front end of the shielding sheet main body extends and bends to both sides to form a pair of riveted main bodies, the riveted main bodies are arc-shaped sheet structures, and the riveted main bodies are used to contact and cooperate with the outer surface of the shielding layer; the rear end of the shielding sheet main body extends and bends to both sides to form a pair of riveted branch parts, and the riveted branch parts are used to tighten the shielding layer; there is a gap between the riveted main body and the riveted branch parts.

[0013] Furthermore, the rear end of the shielding sheet main body extends backward to form an extension portion.

[0014] Furthermore, the radial distance between the movable ends of the two riveted branches is greater than the radial distance between the movable ends of the two riveted main bodies.

[0015] Furthermore, first riveting claws are symmetrically provided on both sides of the rear end of the shielding shell. The first riveting claws are formed by bending and extending toward the inside of the shielding shell on the end surface of the shielding shell facing the shielding buckle plate.

[0016] Furthermore, second riveting claws are symmetrically provided on both sides of the rear end of the shielding shell. The second riveting claws are formed by extending the rear end surface of the shielding shell backward and bending toward the inside of the shielding shell.

[0017] Furthermore, the front end of the bottom of the shielding shell is first bent downward and then extended forward, thereby forming the lower end surface of the shielding cavity; the lower end surface of the shielding cavity is flush with the bottom surface of the shell.

[0018] Furthermore, installation limiting protrusions are provided on both sides of the front end of the shielding shell, and steps are provided on the shell body to stop and cooperate with the installation limiting protrusions in the rear direction.

[0019] Furthermore, an injection molded body is fixedly provided at the rear end of the housing, and the injection molded body wraps around the front ends of the high-speed cables that are fixedly distributed in a row.

[0020] Furthermore, buckles are provided on both sides of the shielding buckle plate, and slots corresponding to the buckles are provided on both sides of the shell.

[0021] Furthermore, the shielding plate is provided with welding holes, and the positions of the welding holes correspond to the upper end surfaces of the shielding shells.

[0022] By means of the above technical solution, the beneficial effects of the present invention are:

[0023] 1. In the present invention, the shielding shell and the shielding buckle are buckled together to form a full shielding structure, which can achieve independent full enclosure shielding for high-speed cables and differential pairs, avoiding crosstalk.

[0024] 2. The present invention adopts the riveting form of high-speed cable and shielding shell for relative fixation and contact conduction, and the shielding performance is very stable.

[0025] 3. The cable insulation layer and inner conductor of the high-speed cable in the present invention are integrally formed, and the structure is stable. Compared with the prior art in which each inner conductor is covered with an insulation layer, the relative movement between the two insulation layers in the same high-speed cable can be avoided, thereby avoiding affecting the high-speed performance.

[0026] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figures 1 to 2 1 and 2 are schematic diagrams of the three-dimensional structure of a high-speed cable assembly of the present invention.

[0028] Figure 3 It is a schematic diagram of the decomposition of the shielding plate and the shell in the present invention.

[0029] Figure 4 It is a schematic diagram of the cooperation between the shielded cable and the housing in the present invention.

[0030] Figures 5 and 6 All of them are three-dimensional views of the shielded cable assembly in the present invention.

[0031] Figure 7 It is a schematic diagram of the connection between the high-speed cable and the contact member in the present invention.

[0032] Figure 8 It is a three-dimensional diagram of the shielding case of the present invention.

[0033] Figure 9 It is a front view schematic diagram of the shielding shell in the present invention.

[0034] Figure 10 It is a three-dimensional structural diagram of a single high-speed cable in the present invention.

[0035] Figures 11 to 12 They are all structural schematic diagrams of the shielding sheet in the present invention.

[0036] Figure 13Schematic diagram of the shielding cavity in the present invention. DETAILED DESCRIPTION

[0037] The technical solution of the present invention is further described in detail below with reference to the accompanying drawings and preferred embodiments.

[0038] In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features indicated.

[0039] Examples of high-speed cable assemblies:

[0040] See also Figures 1 to 13 A high-speed cable assembly includes a shell 1, a shielding plate 2 and several shielded cable assemblies 3. The shell 1 is provided with a mounting groove 11 for accommodating corresponding shielded cable assemblies. A plurality of shielded cable assemblies 3 are arranged in a row, and correspondingly, a plurality of mounting grooves 11 are arranged at intervals along the width direction of the shell 1. In this embodiment, four shielded cable assemblies 3 are provided and four mounting grooves 11 are provided, but the present invention is not limited to this. For the convenience of description, the connector end of the high-speed cable assembly is defined as the front end.

[0041] The shielded cable assembly 3 includes a high-speed cable 4, a shield shell 5, contacts 6, and an insulator 7. The contacts 6 are fixed within the insulator 7 and integrally injection-molded as inserts. Positioning protrusions 71 are symmetrically positioned on either side of the insulator 7. The shield shell 5 is a U-shaped sheet structure, open at the front, back, and top, forming a U-shaped cavity. The insulator 7 is positioned within the shield shell 5. Positioning slots 51 are defined on either side of the shield shell 5, corresponding one-to-one with the positioning protrusions 71. The positioning slots and protrusions cooperate to secure the insulator and the contacts within the insulator. In this embodiment, each insulator 7 is provided with two contacts 6, spaced relative to each other, forming a differential pair for transmitting high-speed signals. From front to back, the contacts 6 are composed of a contact end 61, a fixed section, and a terminal 62. The fixed section is embedded within the insulator, while the contact end 61 protrudes from the front of the shield shell 5.

[0042] The high-speed cable 4 includes a shielding sheet 41, a shielding layer 42, a cable insulation layer 43, and an inner conductor 44 disposed within the cable insulation layer. The inner conductors 44 are arranged in pairs and match the differential pairs. The cable insulation layer 43 is formed as a whole in one piece, which is beneficial for cable stability control and can realize complex processes such as foaming. The cable insulation layer 43 and the inner conductor 44 are integrally injection molded, and the inner conductor 44 is stably fixed within the cable insulation layer 43 as an insert. A shielding layer 42 is provided on the outside of the cable insulation layer 43. In the prior art, the shielding layer 42 is wrapped with a cable outer sheath. In the present invention, the outer sheath is removed, and a copper sheet (shielding sheet 41) is riveted to the outside of the shielding layer 42 to achieve grounding. This has the beneficial effect of preventing ground wire movement from affecting high-speed performance because there is no separate ground wire on the outside of the high-speed cable 4. In this embodiment, the cross-section of the cable insulation layer 43 is elliptical, so that the two conductors can be arranged at intervals within it.

[0043] The shielding sheet 41 includes a main portion 411 extending forward and backward. The front end of the main portion 411 extends and bends to form a pair of riveted main portions 412. The riveted main portions 412 are curved and designed to contact the outer surface of the shielding layer. These portions are responsible for the largest surface area of contact between the shielding sheet 41 and the shielding layer 42, ensuring the stability of the shielding conductivity. The rear end of the main portion 411 extends backward to form an extension portion 413. This extension portion 413 is located at the rear end of the shielding sheet 41 and connects the shielding sheet 41 to the strip. The shielding sheet is mass-produced from the strip, facilitating efficient production. Once the shielding sheet is machined to the desired shape and size, the extension portion 413 can be cut at the connection between the strip and the shielding layer. Furthermore, after the shielding sheet 41 is riveted to the exterior of the shielding layer 42, the extension portion 413 also contacts the outer surface of the shielding layer 42, increasing the contact area between the shielding sheet and the high-speed cable, thereby improving the stability and shielding conductivity of the connection. A riveted branch portion 414 is provided on the shielding sheet main body 411 located between the extension portion 413 and the riveted main body 412. A gap 415 is provided between the riveted main body and the riveted branch portion, i.e., the two are spaced apart to facilitate independent riveting during the riveting process and prevent mutual interference. The shielding sheet main body 411 extends and bends toward both sides to form a pair of riveted branches 414. The riveted branches 414 are used to clamp the shielding layer 42 and serve as the portion responsible for fixing the entire shielding sheet. By comparison, it can be seen that after the shielding sheet is riveted, the radial distance between the active ends of the two riveted branches is greater than that of the active ends of the two riveted main bodies. This ensures the contact area between the riveted main body and the shielding layer, while also ensuring that the riveted branches have a strong riveting effect. Of course, the riveted main body can also play a certain role in riveting and fixing, and the riveted branches can also play a certain role in shielding and conducting.

[0044] The shielding sheet 41 is riveted to the front end of the high-speed cable 4, and the inner conductor passes through the cable insulation layer from the front end of the high-speed cable. The front end of the high-speed cable 4 is riveted inside the rear end of the shielding shell. The inner conductor 44 in the high-speed cable is welded to the terminal 62 of the contact piece in a one-to-one correspondence to achieve contact and conduction of the high-speed signal.

[0045] The shielding shell 5 and shielding plate 41 are riveted together. In this embodiment, first riveting claws 52 are symmetrically positioned on either side of the rear end of the shielding shell 5. These first riveting claws 52 are used to rivet the outer wall of the riveted main body of the shielding plate. To strengthen the riveted connection between the high-speed cable and the shielding shell and increase the number of contacts, second riveting claws 53 are also symmetrically positioned at the rear end of the shielding shell. The second riveting claws 53 are formed by extending and bending the rear end surface of the shielding shell 5 backwards. The second riveted claws 53 also form an interference fit with the outer wall of the riveted main body. The first riveted claws 52 are formed by extending and bending the end surface of the rear end of the shielding shell facing the shielding plate (i.e., the upper end surface) toward the interior of the shielding shell. After the high-speed cable is secured, the bottom of its shielding plate 41 contacts the bottom surface of the inner wall of the shielding shell 5. To ensure a large surface contact, the movable end of the riveted main body is designed to be flat. After the shielding shell 5 is riveted to the high-speed cable 4, the shielding shell 5 surrounds the front end (welding end) of the high-speed cable and the entire contact element on three sides. In addition, the rear end of the shielding shell 5 has a convex portion 54 extending backward, and the convex portion is used to be connected to the shielding shell material strip to achieve batch processing of the shielding shell.

[0046] Furthermore, after the shielded cable assembly 3 is set in the mounting groove 11 of the housing, the shielding plate 2 is buckled onto the housing 1, and the shielding plate 2 covers all the shielding shells 5. The shielding plate 2 is welded to the upper end surface of each shielding shell 5, forming a fully enclosed shield for the connection part between the high-speed cable and the contact and the entire contact, and realizing a common ground for all the shielding shells 5. At the same time, Figure 13 The shielding buckle plate and each shielding shell form several shielding cavities 8 at the front end of the high-speed cable assembly. Each shielding cavity 8 has a pair of contact ends 61 of contact pieces, thereby forming a fully enclosed shielding plug-in cavity with an open front end at the contact end of each differential pair, and shielding and isolating the front ends of adjacent differential pairs to avoid mutual crosstalk.

[0047] In this embodiment, buckles 21 are provided on both sides of the shielding buckle plate 2, and a slot 12 is provided on the shell to engage with the buckle 21. The buckle and the slot are strongly fitted to fix the shielding buckle plate 2 and the shell 1.

[0048] Combine Figure 9 In this embodiment, the front bottom surface of the shielding shell 5 is first bent downward and then extended forward. The bent portion 56 is as shown in FIG. Figure 9As shown, the lower end surface 57 of the shielding cavity 8 for accommodating the contact end is formed, and the shielding cavity 8 is located at the front end of the housing 1. Since the shielding cavity 8 expands downward to avoid a larger contact end insertion space, the height space of the shielding cavity is increased. After the shielding cavity is expanded in the height direction, the lower end surface 57 of the shielding cavity 8 is flush with the bottom surface of the housing 1, and does not occupy additional space in the height direction of the high-speed cable assembly, which is conducive to the flat design of the high-speed cable assembly.

[0049] Furthermore, mounting limit protrusions 55 are provided on both sides of the front end of the shielding shell 5, and a step 13 is provided on the shell 1 to cooperate with the mounting limit protrusion in the rearward direction. The mounting limit protrusion cooperates with the step to serve as a rearward assembly limit when the shielded cable assembly is installed in the shell. After determining the position of the shielded cable assembly in the front-to-back direction, a low-pressure injection molding process is used to set an injection molding body 9 at the rear end of the shell. The injection molding body 9 is integrally connected to the shell 1. The injection molding body 9 wraps around the front end of the high-speed cable 4 and accommodates the shielding sheet 41 therein. Since the injection molding body fixes the shell and the front ends of the rows of high-speed cables as one, the assembly positioning of the shielded cable assembly is achieved, preventing it from moving relative to the shell 1 in the front-to-back direction, that is, the injection molding body plays a plastic sealing and fixing function.

[0050] Furthermore, because the bend forms the mounting stop, the shield cavity is wider than the rear end of the shield shell in the direction of contact arrangement. This also expands the shield cavity widthwise, accommodating scenarios where the two contact ends of a differential pair are bent away from each other. This expansion of the shield cavity width and height eliminates the need for additional space and fully utilizes available space.

[0051] In this embodiment, the shielding plate 2 is provided with a plurality of welding holes 22. The welding holes 22 are through holes extending through the thickness of the shielding plate. The positions of the welding holes should match the upper end faces of the shielding shells 5. When the shielding plate is fastened to the housing, the upper end face of the shielding shell is aligned with the lower end face of the shielding plate. At this time, from a top-down perspective, the upper end face of the shielding shell can be seen through the welding holes. Laser welding is then performed through the welding holes to fuse the shielding shell and the welding holes together. Of course, in another embodiment, the welding holes may not be provided. Laser welding can still be used to achieve the welding connection between the upper end face of the shielding shell and the contact portion of the shielding plate, but the welding efficiency and effect are not as good as the solution with welding holes.

[0052] In this embodiment, locking portions 14 are provided on both sides of the housing. These locking portions cooperate with the matching locking portions of the mating terminals to achieve a locking function after the terminals are plugged together. To accommodate the flattened and miniaturized design of high-speed cable assemblies and minimize the space occupied by the locking portion, the locking portion can utilize an existing snap-fit structure, while the matching locking portion utilizes a corresponding slot structure. However, the present invention does not limit the structure of the locking portion.

[0053] Examples of high-speed cables:

[0054] The high-speed cable is the high-speed cable described in the above embodiment of the high-speed cable assembly, and will not be described in detail here.

[0055] The above is only a preferred embodiment of the present invention. Any simple modification, equivalent change and modification made to the above embodiment by any technician familiar with this profession based on the technical essence of the present invention without departing from the scope of the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A high-speed cable assembly, characterized in that: include: A housing is provided with a plurality of mounting slots, wherein the plurality of mounting slots are arranged in a row along the width direction of the housing; A plurality of shielded cable assemblies are arranged in a row, and the shielded cable assemblies are arranged in corresponding installation slots. The shielded cable assembly includes a high-speed cable, a shielding shell, and a contact. The contact is installed in the shielding shell through an insulator. The high-speed cable includes a cable insulation layer, an inner conductor arranged in the cable insulation layer, a shielding layer arranged outside the cable insulation layer, and a shielding sheet riveted to the outside of the shielding layer. The front end of the high-speed cable is riveted to the shielding shell through the shielding sheet, and the inner conductor is connected to the terminal of the contact. A shielding plate is buckled onto the housing and covers all shielding shells to achieve full shielding of each shielded cable assembly; the shielding plate and each shielding shell form a shielding cavity at the front end of the high-speed cable assembly, the front end of the shielding cavity is open, and the contact end of the contact piece is cantilevered and arranged in the shielding cavity; The shielding shell has a U-shaped sheet structure, and the front end, rear end and top of the shielding shell are open so that the shielding shell itself forms a U-shaped cavity; the front end of the bottom of the shielding shell is first bent downward and then extended forward to form the lower end surface of the shielding cavity, and the lower end surface of the shielding cavity is flush with the bottom surface of the shell; installation limit protrusions are provided on both sides of the front end of the shielding shell, and a step is provided on the shell to stop and cooperate with the installation limit protrusion in the backward direction. With the help of the installation limit protrusion, the width of the shielding cavity in the arrangement direction of the contact pieces is larger than the width of the rear end of the shielding shell.

2. The high-speed cable assembly according to claim 1, wherein: Each insulator is provided with two contacts, which are spaced apart from each other. The two contacts in the same insulator form a differential pair. Two inner conductors are spaced apart in the cable insulation layer, and the inner conductors are used to be welded to the terminal ends of the corresponding contacts.

3. The high-speed cable assembly according to claim 2, wherein: The cable insulation layer in the high-speed cable is formed in one step, and the inner conductor is fixed in the cable insulation layer in the form of an insert.

4. The high-speed cable assembly according to claim 1, wherein: Positioning protrusions are symmetrically arranged on both sides of the insulator, and positioning grooves corresponding to the positioning protrusions are opened on both sides of the shielding shell.

5. The high-speed cable assembly according to claim 1, wherein: The shielding sheet includes a shielding sheet main body extending forward and backward, the front end of the shielding sheet main body extends and bends to both sides to form a pair of riveted main bodies, the riveted main bodies are arc-shaped sheet structures, and the riveted main bodies are used to contact and cooperate with the outer surface of the shielding layer; the rear end of the shielding sheet main body extends and bends to both sides to form a pair of riveted branch parts, and the riveted branch parts are used to tighten the shielding layer; there is a gap between the riveted main body and the riveted branch parts.

6. The high-speed cable assembly according to claim 5, wherein: The rear end of the shielding plate main body extends rearward to form an extension portion.

7. The high-speed cable assembly according to claim 5, wherein: The radial distance between the movable ends of the two riveted branch portions is greater than the radial distance between the movable ends of the two riveted main portions.

8. The high-speed cable assembly according to claim 1, wherein: First riveting claws are symmetrically arranged on both sides of the rear end of the shielding shell. The first riveting claws are formed by bending and extending toward the inside of the shielding shell on the end surface of the shielding shell facing the shielding buckle plate.

9. The high-speed cable assembly according to claim 8, wherein: Second riveting claws are symmetrically provided on both sides of the rear end of the shielding shell. The second riveting claws are formed by extending the rear end surface of the shielding shell backward and bending toward the inside of the shielding shell.

10. The high-speed cable assembly according to claim 1, wherein: An injection molded body is fixedly provided at the rear end of the shell, and the injection molded body wraps the front ends of the high-speed cables that are fixedly distributed in a row.

11. The high-speed cable assembly according to claim 1, wherein: Buckles are provided on both sides of the shielding buckle plate, and slots corresponding to the buckles are provided on both sides of the shell.

12. The high-speed cable assembly according to claim 1, wherein: The shielding buckle plate is provided with welding holes, and the opening positions of the welding holes correspond to the upper end surfaces of each shielding shell.

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