Shielding structure, terminal module and backboard connector

Abstract

The invention provides a shielding structure, a terminal module and a backboard connector, and belongs to the field of connecting devices. The shielding structure comprises a grounding shielding plate used for being fixed on one side of an insulator, one end of the grounding shielding plate corresponding to the plugging end of the contact element is integrally provided with a body tongue piece which extends out and is used for shielding the plugging end of the contact element, the body tongue piece is provided with a continuous side plate, and one end of the grounding shielding plate corresponding to the plugging end of the contact element is welded with a supplementary tongue piece. The supplementary tongue piece is provided with a continuous side plate opposite to the side plate on the body tongue piece, and the body tongue piece and the supplementary tongue piece are spliced to form a shielding cover corresponding to the plugging end of the contact piece. The terminal module comprises the shielding structure. The backboard connector comprises the above terminal module. The half-surrounded shielding mechanism is composed of the two tongue pieces which are independently processed and manufactured and then welded together, and the shielding effect is effectively improved under the condition that the processability is met.

Description

Technical Field

[0001] The present invention belongs to the field of connection devices, and in particular relates to a shielding structure, a terminal module and a backplane connector. Background Art

[0002] Backplane connectors are commonly used for high-speed interconnection between backplanes and daughterboards, enabling complete high-speed signal transmission. Backplane connectors generally consist of a housing and terminal modules mounted on the housing. Each terminal module includes an insulator, signal terminals secured to the insulator, and a shield secured to at least one side of the insulator's thickness. As signal transmission rates continue to increase, signal crosstalk in backplane connectors is becoming increasingly serious, necessitating improved shielding between signal transmission paths.

[0003] To achieve the aforementioned objectives, a Chinese invention patent application, published as CN114079172A, discloses a contact module for a plug assembly. The contact module comprises shielding members on both sides. The shielding member on one side comprises a main body and a grounding shield (i.e., a shielding can) disposed on the main body and providing three-sided shielding for the mating ends of signal terminals. The grounding shield comprises a central wall and two end walls located on either side of the central wall, each of which is formed by bending and perpendicular to the central wall. The inner cavity of the grounding shield serves as a shielding cavity. Each grounding shield comprises an inner shield proximal to the main body and an outer shield distal to the main body. A shield transition portion is disposed between the inner and outer shields. The central wall of the inner shield is coplanar with the main body, while the central wall of the outer shield is non-coplanar with the main body, resulting in different depths within the grounding shield at the two locations. This structure is achieved primarily by bending the central wall of the shield transition portion.

[0004] The outer shield is deep to allow space for the signal terminals of the adapter connector to be inserted. The inner shield's center wall is coplanar with the main body to ensure uniform distance from the shield to the signal terminals, ensuring that product performance meets requirements. However, due to the large amount of material connected to the center wall on both sides of the end wall, the center wall at the shield transition is difficult to form during bending. To facilitate the formation of the shield transition, the end wall needs to be disconnected at the shield transition to form a notch. This notch weakens the shield's shielding effect and can easily deteriorate product performance. Furthermore, the separation of the end wall into two parts increases the complexity of the end wall processing mold, increasing processing costs. Summary of the Invention

[0005] The object of the present invention is to provide a shielding structure to solve the technical problem in the prior art that a shielding cover is provided with a notch on the side wall in order to be formed, thereby affecting the shielding effect. The present invention also aims to provide a terminal module to solve the above technical problems; Another object of the present invention is to provide a backplane connector to solve the above technical problems.

[0006] To achieve the above-mentioned purpose, the technical solution of the shielding structure provided by the present invention is: A shielding structure includes a grounding shielding plate for fixing on one side of an insulator, the end of the grounding shielding plate corresponding to the contact plug-in end is integrally provided with a protruding body tongue for shielding the contact plug-in end, the body tongue has a continuously extending side plate, the side plate is on the side of the contact arrangement direction, and a supplementary tongue is welded to the end of the grounding shielding plate corresponding to the contact plug-in end, the supplementary tongue has a continuous side plate opposite to the side plate on the body tongue, and the body tongue and the supplementary tongue are spliced ​​to form a shielding cover corresponding to the contact plug-in end.

[0007] As a further improvement, a base plate is provided on both tongues, and the base plates of the two tongues are spliced ​​together to form a complete wall panel of the shielding cover. A tooth-shaped structure is provided on the base plate, and the tooth-shaped structures on the two tongues are staggered and interlocked. Part of the edge of the tooth-shaped structure is a welding area for welding to fix the base plates of the two tongues together.

[0008] As a further improvement, the welding area of ​​the tongue piece of the main body is provided with a supporting plate recessed toward the inner side of the shielding cover, and the supporting plate is used to support the welding area of ​​the supplementary tongue piece during the welding process.

[0009] As a further improvement, the welding area of ​​the supplementary tongue is thinned and the thickness after thinning is less than or equal to the depth of the recess of the supporting plate.

[0010] As a further improvement, a lap plate for lap-connecting to and welding the outer surface of the ground shielding plate is provided at one end of the supplementary tongue close to the ground shielding plate.

[0011] As a further improvement, a positioning structure is provided at the junction of the lap plate and the main part of the supplementary tongue. The positioning structure has a positioning surface located on the inner side of the lap plate and facing the grounding shielding plate. The positioning surface can cooperate with the grounding shielding plate stop to position the supplementary tongue in the assembly direction.

[0012] As a further improvement, the positioning structure is a bent step structure, and the inner step surface of the bent step structure constitutes the positioning surface.

[0013] As a further improvement, the shielding structure also includes a mating shielding member for fixing on the other lateral side of the insulator, the mating shielding member includes a shielding mating sheet and an extension plate integrally connected to the end corresponding to the plug-in end of the shielding mating sheet and the contact piece for shielding the open side of the shielding cover, the extension plate and the shielding mating sheet are connected by a bent portion bent outward, and a plurality of bent portions are arranged at intervals along the longitudinal direction of the shielding mating sheet, and a shielding reference extension portion is provided between two adjacent bent portions, which is integrally combined with the shielding mating sheet and coplanar.

[0014] The shielding structure provided by the present invention is a groundbreaking invention. The shielding cover comprises a main tongue integrally mounted on a ground shield plate and supplementary tongues attached to the main tongue. Each tongue includes a continuous side panel, enabling each tongue to be directly stamped without requiring cutouts in the side panels, effectively enhancing the shielding effectiveness of the shielding cover.

[0015] To achieve the above objectives, the technical solution of the terminal module provided by the present invention is: A terminal module includes an insulator and a signal terminal arranged on the insulator, and also includes a shielding structure for providing shielding for the signal terminal. The shielding structure includes a grounding shielding plate for fixing on one side of the insulator. The end of the grounding shielding plate corresponding to the contact plug-in end is integrally provided with a protruding body tongue for shielding the contact plug-in end. The body tongue has a continuously extending side plate. The side plate is on the side of the contact arrangement direction. A supplementary tongue is welded on the end of the grounding shielding plate corresponding to the contact plug-in end. The supplementary tongue has a continuous side plate opposite to the side plate on the body tongue. The body tongue and the supplementary tongue are spliced ​​together to form a shielding cover corresponding to the contact plug-in end.

[0016] As a further improvement, a base plate is provided on both tongues, and the base plates of the two tongues are spliced ​​together to form a complete wall panel of the shielding cover. A tooth-shaped structure is provided on the base plate, and the tooth-shaped structures on the two tongues are staggered and interlocked. Part of the edge of the tooth-shaped structure is a welding area for welding to fix the base plates of the two tongues together.

[0017] As a further improvement, the welding area of ​​the tongue piece of the main body is provided with a supporting plate recessed toward the inner side of the shielding cover, and the supporting plate is used to support the welding area of ​​the supplementary tongue piece during the welding process.

[0018] As a further improvement, the welding area of ​​the supplementary tongue is thinned and the thickness after thinning is less than or equal to the depth of the recess of the supporting plate.

[0019] As a further improvement, a lap plate for lap-connecting to and welding the outer surface of the ground shielding plate is provided at one end of the supplementary tongue close to the ground shielding plate.

[0020] As a further improvement, a positioning structure is provided at the junction of the lap plate and the main part of the supplementary tongue. The positioning structure has a positioning surface located on the inner side of the lap plate and facing the grounding shielding plate. The positioning surface can cooperate with the grounding shielding plate stop to position the supplementary tongue in the assembly direction.

[0021] As a further improvement, the positioning structure is a bent step structure, and the inner step surface of the bent step structure constitutes the positioning surface.

[0022] As a further improvement, the shielding structure also includes a mating shielding member for fixing on the other lateral side of the insulator, the mating shielding member includes a shielding mating sheet and an extension plate integrally connected to the end corresponding to the plug-in end of the shielding mating sheet and the contact piece for shielding the open side of the shielding cover, the extension plate and the shielding mating sheet are connected by a bent portion bent outward, and a plurality of bent portions are arranged at intervals along the longitudinal direction of the shielding mating sheet, and a shielding reference extension portion is provided between two adjacent bent portions, which is integrally combined with the shielding mating sheet and coplanar.

[0023] The terminal module provided by the present invention is an improvement over the prior art. In the shielding structure of the terminal module, the shielding cover comprises a main tongue piece integrally mounted on the ground shield plate and a supplementary tongue piece attached to the main tongue piece. Each tongue piece includes a continuous side plate, which ensures that each tongue piece can be directly stamped without providing a notch in the side plate, effectively improving the shielding effect of the shielding cover.

[0024] To achieve the above objectives, the technical solution of the backplane connector provided by the present invention is: A backplane connector includes an insulating shell and a terminal module mounted on the insulating shell. The terminal module includes an insulator and signal terminals arranged on the insulator, and also includes a shielding structure for providing shielding for the signal terminals. The shielding structure includes a grounding shielding plate for fixing on one side of the insulator. The end of the grounding shielding plate corresponding to the contact plug-in end is integrally provided with a protruding body tongue for shielding the contact plug-in end. The body tongue has a continuously extending side plate. The side plate is on one side of the contact arrangement direction. A supplementary tongue is welded on the end of the grounding shielding plate corresponding to the contact plug-in end. The supplementary tongue has a continuous side plate opposite to the side plate on the body tongue. The body tongue and the supplementary tongue are spliced ​​together to form a shielding cover corresponding to the contact plug-in end.

[0025] As a further improvement, a base plate is provided on both tongues, and the base plates of the two tongues are spliced ​​together to form a complete wall panel of the shielding cover. A tooth-shaped structure is provided on the base plate, and the tooth-shaped structures on the two tongues are staggered and interlocked. Part of the edge of the tooth-shaped structure is a welding area for welding to fix the base plates of the two tongues together.

[0026] As a further improvement, the welding area of ​​the tongue piece of the main body is provided with a supporting plate recessed toward the inner side of the shielding cover, and the supporting plate is used to support the welding area of ​​the supplementary tongue piece during the welding process.

[0027] As a further improvement, the welding area of ​​the supplementary tongue is thinned and the thickness after thinning is less than or equal to the depth of the recess of the supporting plate.

[0028] As a further improvement, a lap plate for lap-connecting to and welding the outer surface of the ground shielding plate is provided at one end of the supplementary tongue close to the ground shielding plate.

[0029] As a further improvement, a positioning structure is provided at the junction of the lap plate and the main part of the supplementary tongue. The positioning structure has a positioning surface located on the inner side of the lap plate and facing the grounding shielding plate. The positioning surface can cooperate with the grounding shielding plate stop to position the supplementary tongue in the assembly direction.

[0030] As a further improvement, the positioning structure is a bent step structure, and the inner step surface of the bent step structure constitutes the positioning surface.

[0031] As a further improvement, the shielding structure also includes a mating shielding member for fixing on the other lateral side of the insulator, the mating shielding member includes a shielding mating sheet and an extension plate integrally connected to the end corresponding to the plug-in end of the shielding mating sheet and the contact piece for shielding the open side of the shielding cover, the extension plate and the shielding mating sheet are connected by a bent portion bent outward, and a plurality of bent portions are arranged at intervals along the longitudinal direction of the shielding mating sheet, and a shielding reference extension portion is provided between two adjacent bent portions, which is integrally combined with the shielding mating sheet and coplanar.

[0032] The backplane connector provided by the present invention is an improvement over the prior art. In the shielding structure of the backplane connector, the shielding cover comprises a main tongue integrally mounted on the ground shield plate and a supplementary tongue attached to the main tongue. Each tongue includes a continuous side plate, which ensures that each tongue can be directly stamped without requiring notches in the side plates, effectively improving the shielding effectiveness of the shielding cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of the overall structure of embodiment 1 of the backplane connector of the present invention; Figure 2 This is a schematic structural diagram of a terminal module in Embodiment 1 of the backplane connector of the present invention; Figure 3 This is an exploded view of the terminal module in Embodiment 1 of the backplane connector of the present invention; Figure 4Schematic diagram of the shielding structure of the backplane connector in embodiment 1 of the present invention; Figure 5 Schematic diagram of the shielding structure welded in the longitudinal direction in Embodiment 1 of the backplane connector of the present invention; Figure 6 Schematic diagram of the shielding structure of the backplane connector in embodiment 1 of the present invention being welded in the horizontal direction; Figure 7 This is a structural schematic diagram of the backplane connector in Embodiment 1 of the present invention, wherein the ground shielding member is removed from the supplementary tongue; Figure 8 Schematic diagram of a partial structure of a ground shield in embodiment 1 of the backplane connector of the present invention; Figure 9 Schematic diagram of the structure of the supplementary tongue in embodiment 1 of the backplane connector of the present invention; Figure 10 This is a schematic structural diagram of a mating shielding member in Embodiment 1 of the backplane connector of the present invention; Figure 11 This is a structural schematic diagram of the front end of the terminal module in embodiment 1 of the backplane connector of the present invention.

[0034] Description of reference numerals: 1. Insulating shell; 2. Conductive shielding mesh; 3. Fisheye positioning plate; 4. Fixing plate; 5. Insulator; 6. Differential pair; 7. Grounding shield; 71. Grounding shield plate; 72. Body tongue; 721. Original side plate; 722. Original end plate; 723. Support plate; 73. Supplementary tongue; 731. Additional side plate; 732. Additional end plate; 733. Thinning portion; 734. Lap plate; 735. Bending step structure; 736. Positioning surface; 8. Mating shield; 81. Shielding mating sheet; 82. Jack; 83. Extension plate; 84. Bending portion; 85. Reference extension portion; 9. Snap protrusion; 10. Deformation hole; 11. Mating protrusion; 12. Welding seam; 13. Enlarged portion. DETAILED DESCRIPTION

[0035] The present invention is described in further detail below with reference to the examples.

[0036] Implementation 1 of the backplane connector provided by the present invention: See attached Figure 1 A backplane connector includes an insulating shell 1, a conductive shielding mesh 2 disposed within the insulating shell 1, a plurality of terminal modules mounted on the insulating shell 1, a fisheye positioning plate 3 and a fixing plate 4 assembled and connected to each terminal module. In the present invention, the plugging direction of the backplane connector is defined as the front-to-back direction, and the end of the backplane connector that plugs into the mating connector is defined as the front end. The direction in which the terminal modules are arranged is defined as the transverse direction, and the direction perpendicular to both the transverse and the front-to-back directions is defined as the longitudinal direction.

[0037] See attached Figure 2 and attached Figure 3 The terminal module includes an insulator 5 and signal terminals fixed to the insulator 5 by injection molding. The signal terminals are arranged in the form of differential pairs 6, and the two signal terminals in the same differential pair 6 are arranged longitudinally. The two ends of the signal terminal extend out of the insulator 5 and form a plug-in end and a fisheye end, respectively. The signal terminal is a contact in the backplane connector. The plug-in end of the signal terminal is used to connect to the plug-in contact on the plug-in connector, and the fisheye end of the signal terminal is used to be crimped to the printed circuit board. A shielding structure is fixed to the terminal module by secondary hot riveting. The shielding structure is used to provide shielding for the signal terminal and reduce crosstalk between the differential pairs 6.

[0038] The shielding structure includes a grounded shield 7 and a mating shield 8 fixed to the lateral sides of the insulator 5. The grounded shield 7 includes a grounded shield plate 71 and a shielding cover connected to the front end of the grounded shield plate 71, which can provide shielding for the contact ends of the differential pair 6. The shielding cover is generally C-shaped, including a bottom wall and side walls connected to both sides of the bottom wall. The bottom wall is located on one lateral side of the corresponding differential pair 6, and the two side walls are located on both longitudinal sides of the corresponding differential pair 6. The bottom wall provides shielding for the differential pair 6 on one lateral side, and the side walls provide shielding for the differential pair 6 on both longitudinal sides. Because the terminal modules are arranged in a lateral direction, the end wall of the shielding cover in one terminal module can provide shielding for the other lateral side of the differential pair 6 in another adjacent terminal module, thereby providing a fully enclosed shielding effect for the contact ends of the differential pair 6.

[0039] The inner cavity of the shielding cover is smaller near the ground shielding plate 71 and larger away from the ground shielding plate 71 to facilitate the insertion of corresponding terminals in the plug-in connector. This structure is achieved by the expansion portion 13 on the end wall. The expansion portion 13 moves the end wall away from the differential pair 6, thereby expanding the inner cavity volume of the shielding cover.

[0040] The shielding cover includes two tongues. One tongue is a main tongue 72, integrally formed with the grounding shield plate 71 through cutting and stamping. Main tongue 72 extends from the front end of the grounding shield plate 71. The other tongue is a supplementary tongue 73, which is separately formed and then welded to the main tongue 72. Both main tongue 72 and supplementary tongue 73 include side panels and a bottom panel. The side panels are continuous and continuous. The side panels of the two tongues form the side walls of the shielding cover, and the bottom panels of the two tongues, when spliced ​​together, form the complete bottom wall of the shielding cover.

[0041] See attached Figure 2 and attached Figure 3 , and combined with the attached Figure 4The end plates of both tongues are equipped with toothed structures that interlock with each other. Part of the edges of the toothed structures serve as welding areas for securing the two tongue end plates. This toothed structure facilitates the fore-aft positioning of the two tongues, increases the weld length, and improves connection reliability.

[0042] In one of the examples of this embodiment, see the attached Figure 5 The welding area is located at the side edge of the toothed structure in the front and rear directions. This embodiment finally obtains multiple longitudinally extending welds 12. Figure 6 The welding area is located at one longitudinal edge of the tooth-shaped structure, and this embodiment ultimately obtains multiple sections of welds 12 extending forward and backward.

[0043] See attached Figure 7 and attached Figure 8 The welding area of ​​the main body tongue 72 is provided with a supporting plate 723 that is recessed toward the inner side of the shielding cover. The supporting plate 723 overlaps with the welding area on the supplementary tongue 73. Before welding, the outer side of the supporting plate 723 can be faced upward, and then the welding area of ​​the main body tongue 72 can be placed on the upper side of the supporting plate 723. The supporting plate 723 is used to support the welding area of ​​the supplementary tongue 73 to facilitate the welding operation.

[0044] See attached Figure 9 In order to prevent the welding spot from protruding from the outer side surface of the end plate, and at the same time to prevent the support plate 723 from being recessed too deep and encroaching on the space of the inner cavity of the shielding cover, in this embodiment, the thickness of the welding area on the supplementary tongue 73 is thinned and the thickness after thinning is less than or equal to the recessed depth of the support plate 723. The purpose is to prevent the welding spot from being higher than the outer side surface of the end plate after welding and forming a short pile effect. In one of the embodiments of this embodiment, laser welding is used for welding, and the size of the protruding welding spot is small. In other embodiments, brazing and other methods can also be used for welding.

[0045] See attached Figure 9 The rear end of the supplemental tongue 73 is provided with a connecting plate 734 for overlapping the outer side surface of the front end of the ground shield plate 71. During assembly, the cooperation between the connecting plate 734 and the ground shield plate 71 supports the rear end of the supplemental tongue 73, thereby ensuring the overall stability of the supplemental tongue 73. Furthermore, the connecting plate 734 and the ground shield plate 71 can be welded together to further secure the connecting plate 734.

[0046] A positioning structure is provided at the junction of the lap plate 734 and the main part of the supplementary tongue 73. The positioning structure has a positioning surface 736 located on the inner side of the lap plate 734 and facing the rear. The positioning surface 736 can cooperate with the front end surface of the grounding shielding plate 71 to position the supplementary tongue 73 in the front and rear directions.

[0047] The positioning structure is specifically a bent step structure 735, the inner step surface of which forms a positioning surface 736. The bent step structure 735 causes the lap plate 734 to be laterally offset from the main portion of the supplementary tongue piece 73, with the lap plate 734 being offset outward from the main portion of the supplementary tongue piece 73. The bent step structure 735 can be directly formed by stamping, resulting in a simple structure and easy processing.

[0048] A snap protrusion 9 facing the mating shield 8 is provided at the rear of the side panels of the two tongues. A corresponding socket 82 is provided on the mating shield 8 for the snap protrusion 9 to be inserted through. Once the snap protrusion 9 is inserted into the corresponding socket 82, the shield cover and the mating shield 8 are connected and electrically connected, thereby further electrically connecting the grounding shield 7 and the mating shield 8. The end of the snap protrusion 9 is chamfered to facilitate insertion into the socket 82. A deformation hole 10 is provided on the snap protrusion 9. The deformation hole 10 can weaken the snap protrusion 9, making it easier to deform, thereby reducing the resistance to inserting the snap protrusion 9 into the corresponding socket 82 and facilitating assembly.

[0049] The outer surfaces of the side plates of the two tongues are both provided with mating protrusions 11. The mating protrusions 11 are bulges formed by stamping, which can fit tightly with the corresponding inner cavity walls of the conductive shielding net 2 to form a reliable conductive connection, thereby making the shielding structures of each terminal module share a common ground.

[0050] In the same backplane connector, there are two types of terminal modules, which differ only in shielding structure. The reason for providing two types of terminal modules is that the contact ends of each differential pair 6 need to be fully surrounded by a shielding effect.

[0051] As described above, the shielding cover can shield the corresponding differential pair 6 contact terminals on both longitudinal sides and one lateral side. The other lateral side of the differential pair 6 contact terminals is shielded by the shielding cover in the adjacent terminal module. However, for a terminal module at one lateral edge of the entire backplane connector, the differential pair 6 contact terminals on it cannot be shielded by the shielding cover of the adjacent terminal module.

[0052] Therefore, the shielding structure of this terminal module is different from that of other terminal modules. Figure 10 and attached Figure 11The mating shield 8 in this terminal module consists of a shield mating plate 81 and an extension plate 83 at the front end of the shield mating plate 81. The extension plate 83 is slotted, dividing it into sections equal to the number of differential pairs 6, for easy insertion into the conductive shielding mesh 2. The extension plate 83 covers the open side of the shield cover, providing full shielding for the signal terminals. The entire mating shield 8 is integrally formed by cutting and stamping.

[0053] The extension plate 83 is connected to the shield mating plate 81 via a bent portion 84, which bends outward at the front end of the shield mating plate 81. This ensures sufficient space within the shield housing for the corresponding terminals of the mating connector. Multiple bent portions 84 are spaced longitudinally along the shield mating plate 81, with a shield reference extension 85 positioned between adjacent bent portions 84. The shield reference extension 85 is integrally integrated with the shield mating plate 81 and coplanar with the shield mating plate 81, providing a shield reference for the corresponding differential pair 6 at an equal distance from the shield mating plate 81, thereby enhancing shielding effectiveness.

[0054] The shielding mating plate 81 and extension plate 83 are machined from a single piece of sheet material. During processing, the overall outline of the sheet material is first cut out. Then, multiple C-shaped slots are punched out longitudinally at the locations where bending is required. The portion between two adjacent C-shaped slots is bent to form a bent portion 84, while the portion surrounded by the C-shaped slots ultimately forms a reference extension portion 85. This not only allows for the reference extension portion 85 to be removed, improving shielding effectiveness, but also allows for a narrower bent portion 84, facilitating bending.

[0055] The shielding cover in the backplane connector is divided into two tongues, each of which contains only one side panel. Therefore, during the stamping process, only one side of the expanded portion 13 of the end plate has a side panel connected to it. Compared with the situation in the prior art where both sides have side panels connected to it, the molding difficulty is lower. Therefore, the side panels at the expanded portion 13 can be set continuously and undivided, ensuring a better shielding effect of the shielding cover.

[0056] Furthermore, in this embodiment, the end wall of the shield is formed by splicing the end plates of the two tongues together. This allows the width of the end plate on each tongue to be smaller. The smaller width of the end plate of the main tongue 72 frees up space for fabricating side panels. This allows a single ground shield 7 to be equipped with the same number of shields as the number of differential pairs 6, eliminating the need to install two shielding plates on the same side of the terminal module to provide a sufficient number of shields, as in the prior art. To achieve this, when the differential pairs 6 are compactly arranged, the width of the end plate on the main tongue 72 needs to be minimized, allowing only the tooth-shaped structure to be retained.

[0057] Embodiment 2 of the backplane connector provided by the present invention: This embodiment is based on embodiment 1, and differs from embodiment 1 in that the positioning structure in this embodiment is a bulge processed by stamping at the junction of the lap plate and the main part of the supplementary tongue piece, the bulge protrudes inward, and the rear side surface of the bulge constitutes the positioning surface.

[0058] Embodiment 3 of the backplane connector provided by the present invention: This embodiment is based on embodiment 1, and differs from embodiment 1 in that, in this embodiment, no positioning structure is provided at the joint position between the lap plate and the main part of the supplementary tongue piece, and the positioning of the supplementary tongue piece in the front and rear directions is achieved by splicing the toothed structure.

[0059] Embodiment 4 of the backplane connector provided by the present invention: This embodiment is based on embodiment 1, and the difference from embodiment 1 is that in this embodiment, no overlap plate is provided on the supplementary tongue piece, and the supplementary tongue piece is only welded and fixed to the main body tongue piece through the welding area on the tooth-shaped structure. During the welding operation, tooling can be used to provide support for the supplementary tongue piece.

[0060] Embodiment 5 of the backplane connector provided by the present invention: This embodiment is based on embodiment 1, and the difference from embodiment 1 is that no support plate is provided in this embodiment, and the welding area on the supplementary tongue and the welding area of ​​the main body tongue form a butt welded joint. Since there is no support plate to provide support, the welding of the supplementary tongue and the main body tongue in this embodiment needs to rely on tooling for positioning and clamping support.

[0061] Embodiment 6 of the backplane connector provided by the present invention: This embodiment is based on embodiment 1, and the difference from embodiment 1 is that no support plate is provided in this embodiment, but the welding area on the supplementary tongue is still overlapped on the welding area of ​​the main body tongue. In order to align the end plate on the supplementary tongue with the end plate on the main body tongue, the welding area on the supplementary tongue in this embodiment is bent outward to form an outward-turned overlapping edge.

[0062] Embodiment 7 of the backplane connector provided by the present invention: This embodiment is based on embodiment 1, and the difference from embodiment 1 is that in this embodiment, no tooth-shaped structure is provided on the end plates of the two tongues. During the welding assembly process, the edges of the end plates of the two tongues are butted together for welding. Since there is no tooth-shaped structure to assist in positioning, the two tongues in this embodiment need to rely on special welding tooling for clamping and positioning.

[0063] Embodiment 8 of the backplane connector provided by the present invention: This embodiment is based on embodiment 1, and differs from embodiment 1 in that the differential pairs on the terminal module in this embodiment are arranged loosely, so the end plates on the main tongues can be made wider, while the end plates on the supplementary tongues can be made narrower.

[0064] In other embodiments of this embodiment, end plates can be set only on the main body tongue, and no end plates are set on the supplementary tongue. The end wall of the shielding cover is only composed of the end plates on the main body tongue. In this embodiment, the supplementary tongue only includes side plates, and the side plates of the supplementary tongue are vertically connected to the end plates of the main body tongue to form a corner joint.

[0065] The terminal module provided by the present invention is implemented as follows: The terminal module is the terminal module in the specific implementation of the backplane connector described above, and will not be described in detail.

[0066] Implementation of the shielding structure provided by the present invention: The shielding structure is the shielding structure in the specific embodiment of the backplane connector described above, and will not be described in detail.

[0067] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments without inventive effort, or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A shielding structure, characterized in that: The invention comprises a ground shielding plate (71) for fixing on one side of an insulator (5); an end of the ground shielding plate (71) corresponding to the contact plug-in end is integrally provided with a protruding body tongue (72) for shielding the contact plug-in end; the body tongue (72) has a continuously extending side plate; the side plate is on one side of the contact arrangement direction; a supplementary tongue (73) is welded on the end of the ground shielding plate (71) corresponding to the contact plug-in end; the supplementary tongue (73) has a continuous side plate opposite to the side plate on the body tongue (72); the body tongue (72) and the supplementary tongue (73) are spliced ​​together to form a shielding cover corresponding to the contact plug-in end.

2. The shielding structure according to claim 1, wherein: Both tongues are provided with a base plate, and the base plates of the two tongues are spliced ​​together to form a complete wall plate of the shielding cover. A tooth-shaped structure is provided on the base plate, and the tooth-shaped structures on the two tongues are staggered and interlocked. Part of the edge of the tooth-shaped structure is a welding area for welding to fix the base plates of the two tongues together.

3. The shielding structure according to claim 2, wherein: The welding area of ​​the body tongue piece (72) is provided with a supporting plate (723) recessed toward the inner side of the shielding cover, and the supporting plate (723) is used to support the welding area of ​​the supplementary tongue piece (73) during the welding process.

4. The shielding structure according to claim 3, wherein: The welding area of ​​the supplementary tongue (73) is thinned, and the thickness after thinning is less than or equal to the depth of the depression of the support plate (723).

5. The shielding structure according to any one of claims 1 to 4, characterized in that: An end of the supplementary tongue (73) close to the ground shielding plate (71) is provided with a lap plate (734) for lap-connecting to the outer surface of the ground shielding plate (71) and welding.

6. The shielding structure according to claim 5, wherein: A positioning structure is provided at the junction of the lap plate (734) and the main body of the supplementary tongue (73), wherein the positioning structure has a positioning surface (736) located on the inner side of the lap plate (734) and facing the ground shielding plate (71), and the positioning surface (736) can cooperate with the ground shielding plate (71) to position the supplementary tongue (73) in the assembly direction.

7. The shielding structure according to claim 6, wherein: The positioning structure is a bent step structure (735), and the inner step surface of the bent step structure (735) constitutes a positioning surface (736).

8. The shielding structure according to any one of claims 1 to 4, characterized in that: The shielding structure also includes a mating shielding member (8) for fixing on the other lateral side of the insulator (5), the mating shielding member (8) including a shielding mating sheet (81) and an extension plate (83) integrally connected to the end of the shielding mating sheet (81) corresponding to the plug-in end of the contact member for shielding the open side of the shielding cover, the extension plate (83) and the shielding mating sheet (81) are connected by a bent portion (84) bent outward, a plurality of bent portions (84) are arranged at intervals along the longitudinal direction of the shielding mating sheet (81), and a shielding reference extension portion (85) integrally combined with the shielding mating sheet (81) and coplanar is provided between two adjacent bent portions (84).

9. A terminal module comprising an insulator (5) and a signal terminal arranged on the insulator (5), characterized in that: The invention also comprises the shielding structure according to any one of claims 1 to 8 for providing shielding for signal terminals.

10. A backplane connector comprising an insulating shell (1), characterized in that: It also includes the terminal module according to claim 9 mounted on the insulating shell (1).

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