Grounding shielding member, terminal assembly and backboard connector

Abstract

The invention provides a grounding shielding piece, a terminal assembly and a backboard connector, and belongs to the field of connecting devices. The grounding shielding piece comprises a shielding part and a grounding fisheye arranged at one end of the shielding part, the shielding part is provided with two shielding spaces which are arranged in parallel and are mutually independent, and the two shielding spaces are used for accommodating the two signal terminals in the same differential pair respectively and providing shielding for the signal terminals in the two signal terminals. The terminal assembly comprises the grounding shielding piece. The backboard connector comprises the above terminal assembly. The grounding shielding piece is provided with two mutually independent shielding spaces, so that a single terminal module can obtain a relatively good shielding effect, and the signal transmission rate is further improved.

Description

Technical Field

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

[0002] High-speed differential backplane connectors are commonly used for high-speed interconnection between backplanes and daughterboards, enabling complete transmission of high-speed signals. As signal transmission rates continue to increase, crosstalk issues with high-speed differential backplane connectors are becoming increasingly prominent.

[0003] To reduce crosstalk between differential pairs, high-speed differential backplane connectors use a grounding shield for each differential pair. This shield provides shielding between the differential pairs. Two examples of grounding shields include the shielding shell disclosed in Chinese Utility Model Patent No. CN213151159U and the C-shaped shielding pin disclosed in Chinese Invention Patent No. CN101958474B.

[0004] Conventional ground shields surround and shield the entire differential pair, reducing crosstalk between the pairs. However, crosstalk still occurs between the two signal terminals within a differential pair. This crosstalk becomes more pronounced at higher signal transmission rates, hindering further increases in signal transmission rates. Summary of the Invention

[0005] The object of the present invention is to provide a ground shield to solve the technical problem of crosstalk between two signal terminals in a differential pair in the prior art; Another object of the present invention is to provide a terminal assembly 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 ground shield provided by the present invention is: A grounding shielding component includes a shielding portion and a grounding fisheye arranged at one end of the shielding portion. The shielding portion has two shielding spaces arranged in parallel and independent of each other. The two shielding spaces are used to respectively accommodate two signal terminals in the same differential pair and provide shielding for the signal terminals therein.

[0007] As a further improvement, the shielding portion includes two shielding cylinders that are arranged in parallel and fixedly connected to each other, and the inner cavities of the two shielding cylinders constitute a shielding space.

[0008] As a further improvement, the shielding portion includes an integrally processed cylindrical body, wherein a partition is provided in the cylindrical body for dividing the inner cavity of the cylindrical body into two shielding spaces, and the partition is fixedly connected to the cylindrical body and is electrically conductive.

[0009] As a further improvement, two opposite side walls of the cylindrical body are provided with insertion gaps for inserting the partition, and the two side edges of the partition are respectively inserted into the two insertion gaps on the cylindrical body.

[0010] As a further improvement, the shielding part includes a substrate and a winding plate integrally connected at both ends of the substrate. The two winding plates are bent by winding so that one end of the winding plate away from the substrate is located at the center of the substrate. The two winding plates respectively form two shielding spaces with the substrate.

[0011] As a further improvement, the shielding portion includes a base plate and a U-shaped enclosure fixedly connected to the same side of the base plate, and the two U-shaped enclosures respectively enclose two shielding spaces with the base plate.

[0012] As a further improvement, the shielding part includes a plug-in shielding segment and a retaining shielding segment. The retaining shielding segment is used to be inserted into the insulating shell of the backplane connector and maintain the stability of the grounding shielding component. The grounding fisheye is located at one end of the retaining shielding segment away from the plug-in shielding segment, and at least one side of the retaining shielding segment is provided with an open structure.

[0013] As a further improvement, the shielding portion includes two C-shaped shielding bodies arranged in parallel and fixed to each other. The shielding portion composed of the two C-shaped shielding bodies is E-shaped as a whole, and the inner cavities of the C-shaped shielding bodies constitute the shielding space.

[0014] As a further improvement, the shielding part includes a C-shaped shielding plate and an isolation plate fixed in the C-shaped shielding plate. The C-shaped shielding plate and the isolation plate are E-shaped as a whole. The isolation plate divides the inner cavity of the C-shaped shielding plate into two shielding spaces.

[0015] The ground shield provided by the present invention is a groundbreaking invention. Compared to existing technologies, it has two independent shielding spaces within it. Two signal terminals within the same differential pair can be placed in the two shielding spaces, reducing crosstalk within the differential pair and providing better shielding for individual signal terminals, further improving signal transmission rates.

[0016] To achieve the above objectives, the technical solution of the terminal assembly provided by the present invention is: A terminal assembly includes two signal terminals and a grounding shield, the grounding shield includes a shielding portion and a grounding fisheye arranged at one end of the shielding portion, the shielding portion has two shielding spaces arranged in parallel and independent of each other, the two shielding spaces are used to respectively accommodate two signal terminals in the same differential pair and provide shielding for the signal terminals therein; the two signal terminals are respectively located in the two shielding spaces on the grounding shield, and an insulating block is separately fixed on the signal terminal, and the insulating block is interference fit with the inner wall surface of the corresponding shielding space.

[0017] As a further improvement, the shielding portion includes two shielding cylinders that are arranged in parallel and fixedly connected to each other, and the inner cavities of the two shielding cylinders constitute a shielding space.

[0018] As a further improvement, the shielding portion includes an integrally processed cylindrical body, wherein a partition is provided in the cylindrical body for dividing the inner cavity of the cylindrical body into two shielding spaces, and the partition is fixedly connected to the cylindrical body and is electrically conductive.

[0019] As a further improvement, two opposite side walls of the cylindrical body are provided with insertion gaps for inserting the partition, and the two side edges of the partition are respectively inserted into the two insertion gaps on the cylindrical body.

[0020] As a further improvement, the shielding part includes a substrate and a winding plate integrally connected at both ends of the substrate. The two winding plates are bent by winding so that one end of the winding plate away from the substrate is located at the center of the substrate. The two winding plates respectively form two shielding spaces with the substrate.

[0021] As a further improvement, the shielding portion includes a base plate and a U-shaped enclosure fixedly connected to the same side of the base plate, and the two U-shaped enclosures respectively enclose two shielding spaces with the base plate.

[0022] As a further improvement, the shielding part includes a plug-in shielding segment and a retaining shielding segment. The retaining shielding segment is used to be inserted into the insulating shell of the backplane connector and maintain the stability of the grounding shielding component. The grounding fisheye is located at one end of the retaining shielding segment away from the plug-in shielding segment, and at least one side of the retaining shielding segment is provided with an open structure.

[0023] As a further improvement, the shielding portion includes two C-shaped shielding bodies arranged in parallel and fixed to each other. The shielding portion composed of the two C-shaped shielding bodies is E-shaped as a whole, and the inner cavities of the C-shaped shielding bodies constitute the shielding space.

[0024] As a further improvement, the shielding part includes a C-shaped shielding plate and an isolation plate fixed in the C-shaped shielding plate. The C-shaped shielding plate and the isolation plate are E-shaped as a whole. The isolation plate divides the inner cavity of the C-shaped shielding plate into two shielding spaces.

[0025] As a further improvement, the terminal assembly further includes two insulating separators, which are respectively arranged in two shielding spaces of the ground shielding member, and the insulating separators perform insulation isolation between the signal terminal and the ground shielding member.

[0026] The terminal assembly provided by the present invention is an improvement over the prior art. Compared to the prior art, the ground shield of the terminal assembly has two independent shielding spaces within it. The two signal terminals within the same differential pair can be arranged in the two shielding spaces, reducing crosstalk within the differential pair and providing better shielding for the individual signal terminals, which helps further increase the signal transmission rate.

[0027] 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 on which a terminal assembly is provided. The terminal assembly includes two signal terminals and a grounding shield. The grounding shield includes a shielding portion and a grounding fisheye arranged at one end of the shielding portion. The shielding portion has two shielding spaces arranged in parallel and independent of each other. The two shielding spaces are used to respectively accommodate two signal terminals in the same differential pair and provide shielding for the signal terminals therein. The two signal terminals are respectively located in the two shielding spaces on the grounding shield. An insulating block is separately fixed on each signal terminal, and the insulating block is interference fit with the inner wall of the corresponding shielding space.

[0028] As a further improvement, the shielding portion includes two shielding cylinders that are arranged in parallel and fixedly connected to each other, and the inner cavities of the two shielding cylinders constitute a shielding space.

[0029] As a further improvement, the shielding portion includes an integrally processed cylindrical body, wherein a partition is provided in the cylindrical body for dividing the inner cavity of the cylindrical body into two shielding spaces, and the partition is fixedly connected to the cylindrical body and is electrically conductive.

[0030] As a further improvement, two opposite side walls of the cylindrical body are provided with insertion gaps for inserting the partition, and the two side edges of the partition are respectively inserted into the two insertion gaps on the cylindrical body.

[0031] As a further improvement, the shielding part includes a substrate and a winding plate integrally connected at both ends of the substrate. The two winding plates are bent by winding so that one end of the winding plate away from the substrate is located at the center of the substrate. The two winding plates respectively form two shielding spaces with the substrate.

[0032] As a further improvement, the shielding portion includes a base plate and a U-shaped enclosure fixedly connected to the same side of the base plate, and the two U-shaped enclosures respectively enclose two shielding spaces with the base plate.

[0033] As a further improvement, the shielding part includes a plug-in shielding segment and a retaining shielding segment. The retaining shielding segment is used to be inserted into the insulating shell of the backplane connector and maintain the stability of the grounding shielding component. The grounding fisheye is located at one end of the retaining shielding segment away from the plug-in shielding segment, and at least one side of the retaining shielding segment is provided with an open structure.

[0034] As a further improvement, the shielding portion includes two C-shaped shielding bodies arranged in parallel and fixed to each other. The shielding portion composed of the two C-shaped shielding bodies is E-shaped as a whole, and the inner cavities of the C-shaped shielding bodies constitute the shielding space.

[0035] As a further improvement, the shielding part includes a C-shaped shielding plate and an isolation plate fixed in the C-shaped shielding plate. The C-shaped shielding plate and the isolation plate are E-shaped as a whole. The isolation plate divides the inner cavity of the C-shaped shielding plate into two shielding spaces.

[0036] As a further improvement, the terminal assembly further includes two insulating separators, which are respectively arranged in two shielding spaces of the ground shielding member, and the insulating separators perform insulation isolation between the signal terminal and the ground shielding member.

[0037] The backplane connector provided by the present invention is an improvement over the prior art. Compared to the prior art, the ground shield of the backplane connector has two independent shielding spaces within it. The two signal terminals within the same differential pair can be arranged in the two shielding spaces, reducing crosstalk within the differential pair and providing better shielding for individual signal terminals, which helps further increase signal transmission rates. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a structural schematic diagram of the backplane connector and the adapter connector in the plugged-in state in Embodiment 1 of the backplane connector of the present invention; Figure 2 This is a structural schematic diagram of the backplane connector and the adapter connector in the non-mated state in embodiment 1 of the backplane connector of the present invention; Figure 3 Schematic diagram of the overall structure of the backplane connector in Embodiment 1 of the backplane connector of the present invention; Figure 4 Schematic diagram of the structure of the ground shield in embodiment 1 of the backplane connector of the present invention; Figure 5 Schematic diagram of the structure of the differential pair in embodiment 1 of the backplane connector of the present invention; Figure 6 Schematic diagram of the structure of the insulating shell in embodiment 1 of the backplane connector of the present invention; Figure 7 A schematic structural diagram of the insulating shell in Embodiment 1 of the backplane connector of the present invention from another perspective; Figure 8 1 is a top view of the insulating shell in embodiment 1 of the backplane connector of the present invention; Figure 9 is a cross-sectional view of a backplane connector in Embodiment 1 of the backplane connector of the present invention; Figure 10 A partial cross-sectional view of a backplane connector in Embodiment 1 of the backplane connector of the present invention; Figure 11 Schematic diagram of the structure of the mounting end of the backplane connector in embodiment 1 of the backplane connector of the present invention; Figure 12 Schematic diagram of a partial structure of the mounting end of the backplane connector in Embodiment 1 of the backplane connector of the present invention; Figure 13 Schematic diagram of the overall structure of the backplane connector in Embodiment 2 of the backplane connector of the present invention; Figure 14 Schematic diagram of the structure of the plug-in end of the backplane connector in Embodiment 2 of the backplane connector of the present invention; Figure 15 Schematic diagram of the structure of the ground shield in embodiment 2 of the backplane connector of the present invention; Figure 16 Schematic diagram of a partial structure of a ground shield in Embodiment 2 of the backplane connector of the present invention; Figure 17 Schematic diagram of the structure of the ground shield in embodiment 3 of the backplane connector of the present invention; Figure 18 Schematic diagram of the structure of the ground shield in the fourth embodiment of the backplane connector of the present invention; Figure 19 Schematic diagram of the structure of the ground shield in the fourth embodiment of the backplane connector of the present invention.

[0039] Description of reference numerals: 1. Insulating shell; 11. Base; 12. Side; 13. Insertion space; 14. Mounting hole; 15. Partition wall; 16. Protruding part; 2. Conductive buckle plate; 21. Matching cavity; 22. Avoidance hole; 23. Via hole; 3. Signal terminal; 31. Mounting section; 32. Contact spring; 33. Signal fisheye; 4. Grounding shield; 41. Plug-in shielding section; 42. Retaining shielding section; 43. Grounding fisheye; 44. Guide ramp; 45. Shielding tube; 46. Open structure; 47. Cylindrical body; 48. Partition; 49. Base plate; 410. U-shaped enclosure; 411. Winding enclosure; 412. Insertion gap; 5. Insulating block; 6. Insulating separator; 7. Adapter connector. DETAILED DESCRIPTION

[0040] The present invention is described in further detail below with reference to the examples.

[0041] Specific embodiment 1 of the backplane connector provided by the present invention: The two ends of the backplane connector in the plug-in and pull-out direction are respectively the plug-in end that is plugged into the adapter connector 7 and the installation end that is crimped into the printed circuit board. In this embodiment, the plug-in and pull-out direction is taken as the front-to-back direction, and the plug-in end of the backplane connector is its front end and the installation end is its rear end.

[0042] See attached Figure 1 , Attachment Figure 2 and attached Figure 3The backplane connector includes an insulating shell 1, a conductive buckle plate 2, a differential pair and a ground shield 4.

[0043] See attached Figure 3 The insulating shell 1 includes a base 11 and side portions 12 located on both sides of the base 11. The side portions 12 and the base 11 together form an insertion space 13 for inserting the end of the adapter connector 7. The insertion space 13 corresponds to the plug-in end of the backplane connector, and the side of the base 11 away from the insertion space 13 corresponds to the installation end of the backplane connector.

[0044] The base 11 of the insulating shell 1 is provided with a mounting hole 14, and the ground shielding member 4 is inserted into the mounting hole 14. Figure 4 The grounding shield 4 includes a shielding portion and a grounding fisheye 43. The shielding portion includes a plug-in shielding segment 41 and a retaining shielding segment 42. Both the plug-in shielding segment 41 and the retaining shielding segment 42 can provide shielding for the differential pair. The plug-in shielding segment 41 is also used to plug into the adapter connector 7 and conduct with the grounding structure on the adapter connector 7. The retaining shielding segment 42 is used to be inserted into the mounting hole 14 on the insulating shell 1 and maintain the stability of the entire grounding shield 4. The grounding fisheye 43 is located at one end of the retaining shielding segment 42 away from the plug-in shielding segment 41 and is used to be pressed into the corresponding hole on the printed circuit board.

[0045] When ground shield 4 is assembled, the plug-in shielding section is located within insertion space 13, and grounding fisheye 43 is located on the side of the base body facing away from the insertion space. A guide ramp 44 is provided on the end of the plug-in shielding section away from the retaining shielding section 42. The end of guide ramp 44 away from the shielding portion is inclined inward, and guide ramp 44 serves as a guide during the insertion of adapter connector 7.

[0046] See attached Figure 5 The differential pair includes two signal terminals 3, and the two signal terminals 3 include a mounting section 31 and contact springs 32 and a signal fisheye 33 located at both ends of the mounting section 31. The contact springs 32 are used to be plugged into the signal contacts in the adapter connector 7, and the signal fisheye 33 is used to be pressed into the corresponding hole on the printed circuit board. The mounting section 31 of the signal terminal 3 is fixed with an insulating block 5 by injection molding.

[0047] After the ground shield 4 is assembled, the signal terminals 3 are inserted into the ground shield 4 from the back to the front. The ground shield 4 has two shielding spaces, with the contact springs 32 of the two signal terminals 3 in the same differential pair located in each shielding space. The insulating block 5 has an interference fit with the inner wall of the corresponding shielding space, thereby securing the corresponding signal terminal 3. After the signal terminal 3 is installed, the signal fisheye 33 and the ground fisheye 43 on the signal terminal 3 are aligned on the same plane. The signal terminal 3 and the ground shield 4 are assembled together to form a terminal assembly.

[0048] In the specific embodiment of this embodiment, see the attached Figure 4 The shielding part includes two rectangular shielding tubes 45 arranged in parallel. The outer surface of the side wall of one of the two shielding tubes 45 is adhered to each other and welded together. The inner cavities of the two shielding tubes 45 respectively constitute two shielding spaces. The shielding tubes 45 form a fully enclosed shielding effect for the corresponding signal terminals 3.

[0049] See attached Figure 6 , Attachment Figure 7 And attached Figure 8 The structure and shape of the mounting hole 14 on the insulating shell are related to the structure of the ground shield. In this embodiment, the ground shield is composed of two shielding cylinders, and a certain gap is left between the shielding sections of the two shielding cylinders. Therefore, the mounting hole 14 has two cavities. A partition wall 15 is provided between the two cavities, which can be inserted into the above-mentioned gap. The partition wall 15 can contact the outer side surfaces of the shielding sections of the two shielding cylinders that are close to each other, thereby increasing the contact area between the insulating shell and the ground shield, thereby enhancing the stability of the ground shield and preventing the ground shield from shaking or falling off. The shielding sections are open on one side. The cavity of the mounting hole 14 is provided with an insertion portion 16 on the side corresponding to the opening of the shielding section, which can extend into the inner side of the shielding section and contact the inner side surface of the shielding section. The insertion portion 16 also increases the contact area between the ground shield and the insulating shell. A narrow gap is formed between the insertion portion 16 and the side wall of the cavity of the mounting hole 14 to constrain the ground shield, further enhancing the stability of the ground shield.

[0050] See attached Figure 9 and attached Figure 10 An insulating separator 6 is disposed within the inner cavity of the shielding cylinder 45. The insulating separator 6 is used to isolate the signal terminal 3 from the corresponding shielding cylinder 45 to prevent the signal terminal 3 from being grounded. The insulating separator 6 can be separately injection molded in advance and then interference-fitted into the shielding cylinder 45, or it can be integrally injection-molded and fixed to the inner cavity surface of the shielding cylinder 45.

[0051] The retaining shield segment 42 of the ground shield 4 is an E-shaped structure with one side open. The mounting hole 14 in the insulating shell 1 is E-shaped to match the structure of the retaining shield segment 42. This ensures that both the inner and outer surfaces of the retaining shield segment 42 are in contact with the insulating shell 1, increasing the contact area and effectively ensuring the stability and reliability of the ground shield 4 when mounted on the insulating shell 1. The portion of the insulating shell 1 that extends into the retaining shield segment 42 is provided with a through-hole for the signal terminal 3 to pass through, facilitating the installation of the signal terminal 3.

[0052] After the signal terminal 3 is assembled, the conductive gusset plate 2 is finally installed from the back to the front on the side of the base 11 of the insulating shell 1 corresponding to the installation end. The base 11 of the insulating shell 1 is provided with an embedding groove, and the conductive gusset plate 2 is interference-fitted in the embedding groove. A matching cavity 21 is provided on the conductive gusset plate 2. One end of the shielding part of the grounding shield 4 close to the grounding fisheye 43 is located in the matching cavity 21 and is in interference contact with the cavity wall of the matching cavity 21. The conductive gusset plate 2 is conductive and is in contact and conduction with each grounding shield 4 to achieve a common ground for each grounding shield 4. See the attached Figure 11 and attached Figure 12 The conductive clip plate 2 is provided with avoidance holes 22 for avoiding the signal terminals 3 at positions corresponding to the respective signal terminals 3 , and the conductive clip plate 2 is provided with through holes 23 for the grounding fisheyes 43 to pass through at positions corresponding to the grounding fisheyes 43 of the grounding shield 4 .

[0053] The conductive gusset plate 2 is made of an insulating material and is electroplated with a metal conductive layer on the surface. This makes the conductive gusset plate 2 light and can undergo elastic deformation to a certain extent, making it easy to assemble. In other embodiments, the conductive gusset plate 2 can also be a metal part formed by powder metallurgy.

[0054] Compared with the existing technology, the ground shield 4 in the backplane connector sets up two independent shielding spaces, so that the two signal terminals 3 of the same differential pair can obtain better shielding effect in the two shielding spaces respectively, reducing the crosstalk within the differential pair, which is conducive to further improving the signal transmission rate.

[0055] Specific embodiment 2 of the backplane connector provided by the present invention: This embodiment is based on the first embodiment, and differs from the first embodiment in the specific structure of the ground shield 4 .

[0056] See attached Figure 13 , Attachment Figure 14 Combined with the attached Figure 15 and attached Figure 16 In this embodiment, the shielding portion of the ground shield 4 includes a rectangular cylindrical body 47 for surrounding the differential pair. A partition 48 is provided in the cylindrical body 47. The partition 48 divides the inner cavity of the cylindrical body 47 into two shielding spaces. The two signal terminals 3 in the same differential pair are respectively located in the two shielding spaces.

[0057] The two opposite side walls of the cylindrical body 47 are provided with a plug-in fitting structure for inserting the partition 48, and the plug-in fitting structure can be a slot, a hole or a plug-in gap 412. Figure 15As shown, the plug-in fitting structure in this embodiment is an insertion gap 412. After the opposite side edges of the partition 48 are inserted into the corresponding insertion gap 412, the partition 48 and the cylindrical body 47 can be welded together by laser welding to ensure the stability of the partition 48.

[0058] In other embodiments, when the plug-in fitting structure is a socket, the partition 48 is inserted into the socket in a direction perpendicular to the corresponding side wall of the cylindrical body 47, and then the partition 48 and the cylindrical body 47 are fixed together by welding.

[0059] In other embodiments, where the plug-in fitting structure is a slot, the slot is provided on the inner surface of the corresponding sidewall of the cylindrical body 47, and the partition 48 is inserted into the corresponding slot from front to back. The slot is machined into the cylindrical body 47 by bending. If the sidewall of the cylindrical body 47 is thick, it can also be machined into the cylindrical body 47.

[0060] In other embodiments of this embodiment, the partition 48 and the cylindrical body 47 may also be bonded and fixed together using structural adhesive. The partition 48 and the cylindrical body 47 may also be fixed using a snap-fit ​​structure. The snap-fit ​​structure specifically includes an opening provided at the edge of the partition 48 and a snap-fit ​​protrusion provided on the side wall of the insertion gap 412 on the cylindrical body 47. During assembly, the snap-fit ​​protrusion is snapped into the snap-fit ​​hole, thereby fixing the partition 48 and the cylindrical body 47 without welding.

[0061] Specific embodiment 3 of the backplane connector provided by the present invention: This embodiment is based on the first embodiment, and differs from the first embodiment in the specific structure of the ground shield 4 .

[0062] See attached Figure 17 In this embodiment, the shielding portion of the ground shield 4 includes a substrate 49 and a U-shaped enclosure 410 fixedly connected to the same side of the substrate 49. The U-shaped enclosure 410 and the substrate 49 together form a shielding space for accommodating one of the signal terminals 3 in the same differential pair.

[0063] In this embodiment, the base plate 49 and the two U-shaped enclosures 410 need to be welded and fixed together to form an integral ground shielding member 4, and then the insulating separator 6 is injection-molded onto the inner surface of the side walls of the two shielding spaces, and then assembled onto the insulating shell 1.

[0064] Specific embodiment 4 of the backplane connector provided by the present invention: This embodiment is based on the first embodiment, and differs from the first embodiment in the specific structure of the ground shield 4 .

[0065] See attached Figure 18In this embodiment, the shielding portion of the ground shield 4 includes a substrate 49 and a winding plate 411 integrally connected to both ends of the substrate 49. The two winding plates 411 are bent so that one end of the winding plate 411 away from the substrate 49 is located at the center of the substrate 49. The two winding plates 411 and the substrate 49 respectively form two shielding spaces that are closed on all sides. The two signal terminals 3 of the same differential pair are respectively located in the two shielding spaces.

[0066] The ground shielding member 4 in this embodiment can be directly integrally formed from a plate without the need for assembly and welding processes, thus resulting in higher molding efficiency and lower costs.

[0067] The substrate 49 may be located on a side of the ground shield 4 corresponding to the open structure 46. Figure 18 The substrate 49 may also be provided on the side opposite to the open structure 46, as shown; Figure 19 shown.

[0068] Specific embodiment 5 of the backplane connector provided by the present invention: This embodiment is based on the first embodiment, and differs from the first embodiment in that no separate insulating block for fixing the signal terminals is provided in this embodiment.

[0069] In this embodiment, the through-holes provided in the portion of the insulating shell extending into the retaining shielding section are interference-fitted with the signal terminals, so that the signal terminals can be directly fixedly mounted on the insulating shell.

[0070] Specific embodiment 6 of the backplane connector provided by the present invention: This embodiment is based on embodiment 1, and differs from embodiment 1 in that the portion of the signal terminal in this embodiment used for plugging into the signal contact of the adapter connector is a pin, rather than the complex contact spring in embodiment 1.

[0071] Since the structure of the pin is simple, it is convenient to set a mold core for secondary injection molding in the inner cavity of the shielding tube. Therefore, the insulating separator and the insulating block used to fix the signal terminal can be injection-molded and fixed in the shielding tube together, which can reduce the assembly steps and enhance the stability of the signal terminal.

[0072] Specific embodiment 7 of the backplane connector provided by the present invention: This embodiment is based on embodiment 1, and differs from embodiment 1 in that no insulating separator is provided in the shielding tube in this embodiment. The internal space of the shielding tube in this embodiment is larger, so there is a sufficiently large gap between the signal terminal and the side wall of the shielding tube so that they do not directly contact each other.

[0073] Specific embodiment 8 of the backplane connector provided by the present invention: This embodiment is based on Embodiment 1, differing from Embodiment 1 in that the retaining shield segment of the ground shield in this embodiment is not open, but is fully enclosed on all sides. In this embodiment, only the outer surface of the retaining shield segment of the ground shield contacts the insulating shell, which also ensures the stability of the ground shield.

[0074] Specific embodiment 9 of the backplane connector provided by the present invention: This embodiment is based on embodiment 1, and differs from embodiment 1 in that the shielding portion in this embodiment includes two C-shaped shielding bodies arranged in parallel and fixed to each other, and the shielding portion formed by the two C-shaped shielding bodies is E-shaped as a whole, and the inner cavities of the C-shaped shielding bodies constitute the shielding space.

[0075] One side of the shielding portion in this embodiment is open. During use, the open side of the shielding portion can be closed by an adjacent ground shielding member, so that the signal terminals can still obtain comprehensive shielding.

[0076] Specific embodiment 10 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, the shielding portion includes a C-shaped shielding plate and an isolation plate fixed inside the C-shaped shielding plate by welding. The C-shaped shielding plate and the isolation plate are E-shaped as a whole, and the partition divides the inner cavity of the C-shaped shielding plate into two shielding spaces.

[0077] One side of the shielding portion in this embodiment is open. During use, the open side of the shielding portion can be closed by an adjacent ground shielding member, so that the signal terminals can still obtain comprehensive shielding.

[0078] Specific implementation of the terminal assembly provided by the present invention: The terminal assembly is the terminal assembly in the above-mentioned backplane connector embodiment, and will not be described in detail.

[0079] Specific implementation of the ground shield provided by the present invention: The ground shielding member is the ground shielding member in the above-mentioned embodiment of the backplane connector, and will not be described in detail.

[0080] 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 ground shield, characterized in that: The shielding portion comprises a shielding portion and a grounding fisheye (43) arranged at one end of the shielding portion. The shielding portion has two shielding spaces arranged in parallel and independent of each other. The two shielding spaces are used to respectively accommodate two signal terminals (3) in the same differential pair and provide shielding for the signal terminals (3) therein.

2. The ground shield according to claim 1, wherein: The shielding portion comprises two shielding cylinders (45) arranged in parallel and fixedly connected to each other, and the inner cavities of the two shielding cylinders (45) both constitute shielding spaces.

3. The ground shield according to claim 1, wherein: The shielding portion comprises an integrally processed cylindrical body (47), wherein a partition (48) is provided in the cylindrical body (47) for dividing the inner cavity of the cylindrical body (47) into two shielding spaces, and the partition (48) is fixedly connected to the cylindrical body (47) and electrically conductive.

4. The ground shield according to claim 3, wherein: Insertion gaps (412) for inserting the partition (48) are provided on two opposite side walls of the cylindrical body (47), and the two side edges of the partition (48) are respectively inserted into the two insertion gaps (412) on the cylindrical body (47).

5. The ground shield according to claim 1, wherein: The shielding portion includes a substrate (49) and winding panels (411) integrally connected at both ends of the substrate (49). The two winding panels (411) are bent by winding so that one end of the winding panels (411) away from the substrate (49) is located at the center of the substrate (49). The two winding panels (411) respectively enclose two shielding spaces with the substrate (49).

6. The ground shield according to claim 1, wherein: The shielding portion comprises a base plate (49) and a U-shaped enclosure plate fixedly connected to the same side of the base plate (49), and the two U-shaped enclosure plates and the base plate (49) respectively enclose two shielding spaces.

7. The ground shield according to any one of claims 1 to 6, wherein: The shielding portion comprises a plug-in shielding section and a retaining shielding section (42), wherein the retaining shielding section (42) is used for being inserted into an insulating shell (1) of a backplane connector and maintaining the stability of a grounding shielding member (4), a grounding fisheye (43) is located at an end of the retaining shielding section (42) away from the plug-in shielding section, and at least one side of the retaining shielding section (42) is provided with an open structure (46).

8. The ground shield according to claim 1, wherein: The shielding part comprises two C-shaped shielding bodies arranged in parallel and fixed to each other. The shielding part composed of the two C-shaped shielding bodies is E-shaped as a whole, and the inner cavities of the C-shaped shielding bodies constitute the shielding space.

9. The ground shield according to claim 1, wherein: The shielding part includes a C-shaped shielding plate and an isolation plate fixed in the C-shaped shielding plate. The C-shaped shielding plate and the isolation plate are E-shaped as a whole. The isolation plate divides the inner cavity of the C-shaped shielding plate into two shielding spaces.

10. A terminal assembly comprising two signal terminals (3), characterized in that: It also includes the ground shielding member (4) according to any one of claims 1 to 9, wherein the two signal terminals (3) are respectively located in two shielding spaces on the ground shielding member (4), and an insulating block (5) is separately fixed on each of the signal terminals (3), and the insulating block (5) is interference-fitted with the inner wall surface of the corresponding shielding space.

11. The terminal assembly according to claim 10, wherein: The terminal assembly further comprises two insulating separators (6), which are respectively arranged in two shielding spaces of the ground shield (4), and the insulating separators (6) perform insulation isolation between the signal terminal (3) and the ground shield (4).

12. A backplane connector comprising an insulating shell (1), characterized in that: The insulating shell (1) is provided with the terminal assembly according to claim 10 or 11.

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