High-speed backplane connector

Abstract

The utility model provides a high-speed backboard connector, and belongs to the field of connecting devices. The high-speed backboard connector comprises a terminal module, a shielding sheet, an insulating shell and a shielding shell, and further comprises grounding contact pieces in one-to-one correspondence with differential pairs, each grounding contact piece comprises a shielding cylinder and at least two grounding elastic claws arranged on the cylinder walls, perpendicular to each other, of the shielding cylinder, and the shielding shell comprises a main body frame. The main body frame is provided with mounting positions for inserting the shielding cylinder, each mounting position is provided with a limiting part which is tightly matched with the corresponding side surface of the shielding cylinder so as to enable the shielding cylinder and the shielding shell to be conducted and fixed, and each side surface of the shielding cylinder corresponds to at least one limiting part; at least one of the shielding cylinder and the shielding sheet is provided with a conductive connection structure for conducting the shielding cylinder and the shielding sheet. According to the utility model, the grounding elastic claw is arranged on the shielding cylinder, and the shielding cylinder is assembled on the shielding shell, so that the shielding cylinder and the shielding sheet only need to be conducted, the structure of the shielding cylinder can be simplified, and the manufacturing and assembling difficulty is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of connection devices, and in particular relates to high-speed backplane connectors. Background Technology

[0002] High-speed backplane connectors are widely used in core communication equipment such as switches and servers. With the increase in communication transmission rate, high-speed backplane connectors need to have stronger anti-crosstalk capabilities.

[0003] See appendix Figure 1 and attached Figure 2 Existing high-speed backplane connectors generally include terminal modules 5 and insulating shells 3 for assembling terminal modules 5. High-speed backplane connectors achieve shielding through shielding plates 6 and shielding shells 4. Shielding plates 6 are installed on one or both sides in the thickness direction of terminal modules 5 to shield signals between different terminal modules 5. Shielding shells 4 are installed inside insulating shells 3 and have multiple cells. The signal claws of the differential pairs on the terminal modules 5 are located in the corresponding cells, so that after mating with the adapter connector, the cells can shield the signal at the signal claws 541.

[0004] In some high-speed backplane connectors, the above shielding methods are insufficient to meet their requirements. Grounding springs are then needed between signal springs 541 of adjacent differential pairs on the same terminal module 5 and between signal springs 541 of adjacent differential pairs on different terminal modules. These grounding springs absorb the radiated signals from the signal springs, further enhancing the shielding effect. The grounding spring between signal springs of adjacent differential pairs on different terminal modules is designated as the first grounding spring 73, and the grounding spring between signal springs of adjacent differential pairs on the same terminal module is designated as the second grounding spring 74. The first grounding spring 73 and the second grounding spring 74 together constitute the shielding structure used to shield the differential pairs.

[0005] like Figure 3 As shown, in this high-speed backplane connector, the first grounding spring claw 73 is integrally disposed on the shielding plate 6, thereby providing shielding between the signal spring claws 541 of adjacent differential pairs on different terminal modules 5; the second grounding spring claw 74 is disposed on the common ground plate 8 perpendicular to the shielding plate, and the common ground plate 8 is provided with multiple second grounding spring claws 74, each of which is used to provide shielding between the signal spring claws 541 of adjacent differential pairs on the same terminal module 5. In this high-speed backplane connector, shielding plates 6 are provided on both sides of the terminal module 5 in the thickness direction. During the assembly process, the common ground plate 8 needs to be fixedly installed on the terminal module first, and needs to be grounded and connected with the shielding plate 6, and then it is installed into the insulating shell 3 together with the terminal module 5.

[0006] For this purpose, two pairs of claws are provided on the grounding plate 8 corresponding to each terminal module. The two pairs of claws are first claws 81 and second claws 82. The two first claws 81 are located between the two second claws 82, and the height of the first claws 81 is higher than that of the second claws 82. The shielding plate 6 is provided with a stepped bending structure 68, which divides the shielding plate 6 into a first piece 66 and a second piece 67. The distance between the two first pieces 66 in the same terminal module is smaller than the distance between the two second pieces 67. The grounding spring claw is connected to the second piece 67. During assembly, the two second claws 82 are respectively pressed against the outer surfaces of the two second pieces 67, and the two first claws 81 pass through the opening at the stepped bending structure 68 and are respectively pressed against the outer surfaces of the two first pieces 66.

[0007] In existing high-speed backplane connectors, the claws have a long, thin structure and are numerous and densely distributed, making the manufacturing of the grounding tab difficult. Furthermore, the claws have relatively poor strength, making them prone to bending failure during assembly, further complicating the assembly of the grounding tab. To ensure the stability of the grounding tab, slots for insertion are provided on the insulator of the terminal module. The grounding tab has a bulge 83 for a tight fit with the inner wall of the slot, improving the bonding strength between the grounding tab and the terminal module. However, this bulge further increases the manufacturing difficulty of the grounding tab; if the bulge is too small, the bonding strength between the grounding tab and the terminal module will be weak, while if the bulge is too large, the assembly will be too tight and difficult. The high manufacturing and assembly difficulty of the grounding tab in existing high-speed backplane connectors results in high production costs for the applied high-speed backplane connectors. Utility Model Content

[0008] The purpose of this utility model is to provide a high-speed backplane connector to solve the technical problem that the manufacturing and assembly of the common ground plate used to provide the assembly base for the grounding spring claw in the existing high-speed backplane connectors are difficult, resulting in high production costs for the high-speed backplane connector.

[0009] To achieve the above objectives, the technical solution of the high-speed backplane connector provided by this utility model is as follows:

[0010] A high-speed backplane connector includes a terminal module, an insulating shell, and a shielding shell. The terminal module includes an insulator, a shielding plate fixed on the insulator, and signal terminals. The signal terminals are arranged in pairs to form differential pairs. The high-speed backplane connector also includes a shielding structure for shielding the differential pairs. The shielding structure includes shielding cylinders that correspond one-to-one with the differential pairs and grounding claws provided on at least two mutually perpendicular cylinder walls of the shielding cylinders. The shielding cylinders and shielding plates are in contact and conductive. The shielding shell includes a main frame with mounting positions for inserting shielding cylinders. Each mounting position has a limiting part that tightly fits the corresponding side of the shielding cylinder to make the shielding cylinder conductive and fixed to the shielding shell.

[0011] As a further improvement, the insulating shell and / or shielding shell are provided with a limiting structure for blocking one end of the shielding tube in the mating direction of the high-speed backplane connector, and the other end of the shielding tube in the mating direction of the high-speed backplane connector is blocked by the terminal module.

[0012] As a further improvement, one end of the signal terminal extends out of the insulator and forms a signal claw. The main frame includes a frame, a main partition, and a limiting partition perpendicular to the main partition. The main partition and the limiting partition divide the space within the frame to form various mounting positions. The main partition is located between adjacent end sub-modules, and the limiting partition is located between the signal claws of two adjacent differential pairs of the same terminal module. The limiting partition and the shielding cylinder at the corresponding mounting position are engaged in a stop-fitting cooperation in the mating direction of the high-speed backplane connector. The limiting partition constitutes a limiting structure on the shielding shell.

[0013] As a further improvement, a first limiting body and a second limiting body are provided on the inner side of the main partition and the frame portion parallel to the main partition. The mating direction of the high-speed backplane connector is defined as the first direction, the thickness direction of the terminal module is defined as the second direction, and the direction perpendicular to both the first and second directions is defined as the third direction. The first limiting body is provided with a first limiting part for limiting the corresponding shield in the third direction between two adjacent shielding tubes in the third direction, and both ends of the first limiting body in the third direction are provided with a first limiting part for limiting the corresponding shield in the third direction. The second limiting body is provided with a second limiting part for limiting the corresponding shield in the second direction on one side of the shielding tube in the second direction, and the end of the second limiting body in the second direction is provided with a second limiting part for limiting the corresponding shield in the second direction. The first limiting body and the limiting partition at the corresponding position are offset in the third direction so that the end face of the limiting partition facing the shielding tube in the first direction is exposed, thereby enabling it to stop and cooperate with the corresponding shielding tube in the first direction.

[0014] As a further improvement, the first limiting body and the second limiting body are arranged in a group and the first limiting body and the second limiting body in the same group are integrally connected. The inside corner structure formed by the first limiting body and the second limiting body cooperates with the outside corner structure formed by two mutually perpendicular cylinder walls on the shielding cylinder.

[0015] As a further improvement, the insulating shell is provided with a limiting structure for blocking one end of the shielding tube in the mating direction of the high-speed backplane connector, and the shielding shell is provided with a limiting engagement structure for blocking the other end of the shielding tube in the mating direction of the high-speed backplane connector.

[0016] As a further improvement, the limiting fit structure includes a stop portion and an inwardly turned portion located at the end of the stop portion. The stop portion is located at the end of the shielding tube away from the insulating shell in the mating direction and stops and limits the shielding tube at that end. The inwardly turned portion is located on the inner side of the shielding tube, and the inwardly turned portion and the side wall of the corresponding mounting position form a groove-shaped structure for clamping the shielding tube.

[0017] As a further improvement, the side of the shielding cylinder is provided with an outwardly protruding mating protrusion for tight engagement with the inner wall surface of the mounting position, and the inner wall surface of the mounting position constitutes a limiting part.

[0018] As a further improvement, a receiving groove for accommodating the stopping part is provided at the position corresponding to the shielding cylinder and the stopping part, and the stopping part and the bottom of the receiving groove are engaged to stop each other.

[0019] As a further improvement, a limiting post is provided on the insulating shell, and at least one limiting post is provided for each mounting position. The end face of the limiting post and the end face of the shielding cylinder at the corresponding mounting position are engaged to stop each other in the mating direction of the high-speed backplane connector. The limiting post constitutes a limiting structure on the insulating shell.

[0020] As a further improvement, the limiting part includes a limiting body and a limiting protrusion that protrudes from the limiting body and presses against the shielding cylinder.

[0021] As a further improvement, one end of the signal terminal extends out of the insulator and forms a signal claw. The shielding sheet is provided with a slot. The shielding cylinder includes two first cylinder walls and two second cylinder walls arranged opposite to each other. The first cylinder walls are perpendicular to the second cylinder walls. The second cylinder walls are located between the signal claws of two adjacent differential pairs on the same terminal module. The second cylinder walls are inserted into the corresponding slots.

[0022] As a further improvement, the two sides of the slot include a guide portion and a contact portion arranged sequentially from the slot opening to the slot bottom. The slot width at the slot opening is greater than the slot width at the contact portion. The guide portion is a beveled or arc-shaped edge used to guide the shielding cylinder from the slot opening to the contact portion.

[0023] As a further improvement, two slots that mate with the same shielding tube form a slot pair, and the two slots in at least one slot pair on the same shielding sheet have different slot depths.

[0024] As a further improvement, the shielding sheet has a slot between two slots that mate with the same shielding cylinder, and the shielding sheet forms a first cantilever structure that is easy to deform between the slot and the adjacent slot.

[0025] As a further improvement, a reinforcing protrusion protruding along the thickness direction of the terminal module is provided at the position corresponding to the insulator and the signal claw, and at least one slot also serves as a clearance slot for avoiding the reinforcing protrusion.

[0026] As a further improvement, two slots that mate with the same shielding cylinder form a slot pair, and the portion between adjacent slot pairs on the shielding sheet forms a second cantilever structure. The end of the second cantilever structure is provided with a deformation adjustment groove so that the end of the second cantilever structure forms a fork-shaped structure that is easy to deform in the wall thickness direction of the second cylinder wall.

[0027] As a further improvement, one end of the signal terminal extends out of the insulator and forms a signal spring claw. The shielding cylinder includes two first cylinder walls and two second cylinder walls arranged opposite to each other. The first cylinder walls are perpendicular to the second cylinder walls. The second cylinder walls are located between the signal spring claws of two adjacent differential pairs on the same terminal module. Grounding spring claws are provided on both first cylinder walls of the same shielding cylinder, and grounding spring claws are provided on at least one second cylinder wall of the same shielding cylinder.

[0028] As a further improvement, the grounding spring claw set on the first cylinder wall is the first grounding spring claw, and the grounding spring claw set on the second cylinder wall is the second grounding spring claw, and the number of second grounding spring claws set on the same second cylinder wall is at least two.

[0029] As a further improvement, the number of second grounding spring claws set on the same second cylinder wall is two. The two second grounding spring claws are respectively aligned with the two signal spring claws in the corresponding differential pair in the wall thickness direction of the second cylinder wall. The end of the second grounding spring claw connected to the shielding cylinder is its root, and the end of the second grounding spring claw away from the shielding cylinder is its end. The root width of the second grounding spring claw is greater than the end width of the second grounding spring claw.

[0030] The beneficial effects are as follows: The high-speed backplane connector provided by this utility model is an improved invention. This high-speed backplane connector places the grounding claw on the shielding cylinder. The shielding cylinder can be assembled onto the shielding shell by cooperating with the limiting part on the shielding shell. Only a conductive connection structure is needed between the shielding cylinder and the shielding plate to ensure conductivity; no complex structure is required for a stable connection. Therefore, the structure of the shielding cylinder is simpler than that of the common grounding plate in the prior art, making it easier to manufacture. Furthermore, since the assembly process involves inserting the shielding cylinder into the corresponding mounting position, the assembly difficulty is reduced, improving assembly efficiency. Therefore, the production cost of this high-speed backplane connector is also lower. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the existing technology;

[0032] Figure 2 This is a partial structural diagram of the prior art;

[0033] Figure 3 This is a schematic diagram illustrating the assembly relationship between the terminal module and the ground plane in the prior art.

[0034] Figure 4 This is a schematic diagram of the structure of Embodiment 1 of the high-speed backplane connector of this utility model;

[0035] Figure 5 This is a schematic diagram of the terminal module of Embodiment 1 of the high-speed backplane connector of this utility model;

[0036] Figure 6 This is a schematic diagram of the assembly structure of the shielding shell and the insulating shell of Embodiment 1 of the high-speed backplane connector of this utility model.

[0037] Figure 7 This is a schematic diagram of the insulating shell structure of Embodiment 1 of the high-speed backplane connector of this utility model;

[0038] Figure 8 This is a schematic diagram of the shielding shell structure of Embodiment 1 of the high-speed backplane connector of this utility model;

[0039] Figure 9 This is a partial structural schematic diagram of the shielding shell of Embodiment 1 of the high-speed backplane connector of this utility model;

[0040] Figure 10 This is a schematic diagram of the assembly structure of the terminal module, shielding shell, and insulating shell of Embodiment 1 of the high-speed backplane connector of this utility model.

[0041] Figure 11 This is a schematic diagram of the assembly structure of the shielding shell and grounding contact of Embodiment 1 of the high-speed backplane connector of this utility model.

[0042] Figure 12 This is a partial structural diagram of the assembly of the shielding shell and grounding contact in Embodiment 1 of the high-speed backplane connector of this utility model.

[0043] Figure 13 This is a cross-sectional view from one perspective of Embodiment 1 of the high-speed backplane connector of this utility model.

[0044] Figure 14 This is a cross-sectional view from another perspective of Embodiment 1 of the high-speed backplane connector of this utility model;

[0045] Figure 15 This is a partial structural diagram of the terminal module of Embodiment 1 of the high-speed backplane connector of this utility model;

[0046] Figure 16 This is a schematic diagram of the grounding contact A in Embodiment 1 of the high-speed backplane connector of this utility model;

[0047] Figure 17 This is a schematic diagram of the grounding contact B in Embodiment 1 of the high-speed backplane connector of this utility model;

[0048] Figure 18 This is a schematic diagram of a spring arm structure provided on the grounding contact of Embodiment 1 of the high-speed backplane connector of this utility model.

[0049] Figure 19This is a schematic diagram of the grounding contact of Embodiment 9 of the high-speed backplane connector of this utility model;

[0050] Figure 20 This is a schematic diagram of the assembly structure of the insulating shell and the shielding shell in Embodiment 9 of the high-speed backplane connector of this utility model.

[0051] Figure 21 This is a partial cross-sectional view of Embodiment 9 of the high-speed backplane connector of this utility model;

[0052] Figure 22 This is a partial cross-sectional view from another perspective of Embodiment 9 of the high-speed backplane connector of this utility model.

[0053] Figure 23 This is a partial cross-sectional view of the shielding shell of Embodiment 9 of the high-speed backplane connector of this utility model.

[0054] Figure 24 This is a partial structural diagram of the shielding shell of Embodiment 9 of the high-speed backplane connector of this utility model.

[0055] Explanation of reference numerals in the attached figures:

[0056] 1. Fixing plate; 2. Positioning plate; 3. Insulating shell; 31. Base; 32. Guide fastener; 33. Guide groove; 34. Limiting post; 4. Shielding shell; 41. Guide protrusion; 42. Top pressure protrusion; 43. Frame; 44. Main partition; 45. Limiting partition; 46. First limiting body; 461. First limiting part; 47. Second limiting body; 471. Second limiting part; 4711. Limiting body; 4712. Limiting protrusion; 48. Stop part; 49. Inward turning part; 5. Terminal module; 51. Terminal module A; 52. Terminal module B; 53. Insulator; 531. Hot riveting post; 532. Reinforcing protrusion; 5 4. Signal terminal; 541. Signal spring claw; 55. Clearance groove; 6. Shielding plate; 61. Slot; 611. Guide part; 612. Contact part; 613. Adjustment part; 62. Slot; 63. First cantilever structure; 64. Second cantilever structure; 65. Deformation adjustment groove; 66. First piece; 67. Second piece; 68. Stepped bending structure; 7. Grounding contact; 71. Shielding cylinder; 72. Spring arm structure; 73. First grounding spring claw; 74. Second grounding spring claw; 75. Notch; 76. Mating protrusion; 77. Receiving groove; 8. Common ground piece; 81. First claw; 82. Second claw; 83. Bulge. Detailed Implementation

[0057] The present invention will be further described in detail below with reference to the embodiments.

[0058] To address the problems in the existing technology, the basic concept of this utility model is to use a shielding cylinder as the basis for assembling the grounding spring claw, thereby reducing the manufacturing and assembly difficulty of the grounding contact component.

[0059] Specific embodiment 1 of the high-speed backplane connector provided by this utility model:

[0060] This high-speed backplane connector is a bent, wide-edge coupled connector; see attached document. Figure 4 It mainly includes several terminal modules 5, fixing pieces 1, positioning plates 2, insulating shells 3 and shielding shells 4.

[0061] The direction in which the high-speed backplane connector and the adapter connector mate is defined as the first direction, the thickness direction of the terminal module 5 is defined as the second direction, and the direction perpendicular to both the first and second directions is defined as the third direction. The end of the backplane connector that mates with the adapter connector is its front end.

[0062] See appendix Figure 5 Each terminal module 5 includes terminal module A51 and terminal module B52. Terminal module A51 and terminal module B52 each include an insulator 53 and a signal terminal 54 fixed to the insulator 53 by injection molding. Terminal module A51 and terminal module B52 are joined together along the thickness, i.e., the second direction. The signal terminals 54 of the two correspond one-to-one and form a differential pair for transmitting differential signals. The signal terminal 54 extends from the plug end of terminal module 5 out of the insulator 53 to form a signal spring claw 541. The signal spring claws 541 in the same differential pair are arranged at intervals along the second direction. The differential pairs in the same terminal module 5 are arranged at intervals along the third direction.

[0063] Terminal module 5 also includes two shielding plates 6, located on opposite sides of terminal module 5 in the second direction, specifically on the sides of terminal modules A51 and B52 that are furthest from each other. Both terminal modules A51 and B52 have heat-sealed posts 531 formed on their insulators 53. Corresponding positions on the shielding plates 6 have connecting holes for the heat-sealed posts 531 to pass through. After the shielding plates 6 are installed on both sides of terminal module 5, they can be fixed to terminal module 5 by heat pressing. Terminal module B52 also has through holes for some of the heat-sealed posts 531 on terminal module A51 to pass through. These heat-sealed posts 531, when heat-pressed, can securely connect terminal modules A51 and B52, improving their stability and ensuring the signal transmission effect of the differential pair.

[0064] See appendix Figure 6The shielding shell 4 is installed inside the insulating shell 3. The insulating shell 3 is used to install and fix each terminal module, and the shielding shell 4 is used to enhance the shielding effect of each terminal module and realize the common ground conduction of the shielding plates 6 of each terminal module. The insulating shell 3 is made of plastic, and the shielding shell 4 is made of conductive plastic. In other embodiments, the shielding shell 4 can also be a plastic shell with a conductive layer electroplated or sprayed on the surface, or it can be a metal shell.

[0065] See appendix Figure 7 The insulating shell 3 includes a base 31 and guide fasteners 32 located at both ends of the base 31 in a third direction. The base 31 has through holes for the contacts on the adapter connector to pass through and engage with the corresponding signal spring claw 541 or grounding spring claw. The space between the two guide fasteners 32 constitutes an installation space for installing each terminal module. The inner side of the guide fasteners 32 is provided with a guide structure for guiding each terminal module 5 and a snap-fit ​​structure for snapping and fixing each terminal module 5. The guide structure and the snap-fit ​​structure are existing technologies and will not be described in detail here.

[0066] See appendix Figure 8 and attached Figure 9 The shielding shell 4 is also installed in the installation space. The inner side of the guide fastener 32 is provided with a guide groove 33 for guiding the shielding shell 4 during assembly in the first direction. The corresponding position of the shielding shell 4 is provided with a guide protrusion 41 for guiding and inserting with the guide groove 33. The shielding shell 4 and the insulating shell 3 are fixed together by a tight fit. After the terminal modules 5 are assembled, the terminal modules 5 and the insulating shell 3 sandwich the shielding shell 4 in the middle, thereby ensuring the stability of the shielding shell 4. However, in order to ensure the connection between the shielding shell 4 and the insulating shell 3 is stable during the assembly process, in this embodiment, a pressing protrusion 42 is provided on the side wall of the guide protrusion 41 for tight fit with the guide groove 33, so as to enhance the clamping force between the shielding shell 4 and the insulating shell 3, thereby increasing the static friction between the two.

[0067] See appendix Figure 1 and in conjunction with the appendix Figure 16 and attached Figure 17 The high-speed backplane connector also includes a grounding contact 7, which includes a shielding cylinder 71 and a grounding claw located at one end of the shielding cylinder 71 in a first direction. In use, the grounding contact 7 is fitted over the portion of the corresponding differential pair extending from the mating end of the terminal module 5, and each grounding claw is arranged around the signal claw 541 in the corresponding differential pair. In this embodiment, the grounding contact 7 constitutes a shielding structure for shielding the differential pairs.

[0068] See appendix Figure 10 Appendix Figure 11 and attached Figure 12The grounding contact 7 is installed inside the shielding shell 4, fixed relative to the shielding shell 4, and conductive. The shielding shell 4 includes a main frame, on which mounting positions for inserting each grounding contact 7 are provided. The shielding shell 4 also includes limiting parts provided at the mounting positions. Each side of the shielding cylinder 71 corresponds to at least one limiting part. The limiting parts are tightly fitted with the corresponding side of the shielding cylinder 71, thereby fixing the shielding cylinder 71 and making the shielding cylinder 71 conductive with the shielding shell 4.

[0069] Specifically, the main frame of the shielding shell 4 includes a frame 43 and a main partition 44 and a limiting partition 45 located within the frame 43. The limiting partition 45 is perpendicular to the main partition 44. The main partition 44 and the limiting partition 45 divide the space within the frame 43 to form various mounting positions. After assembly, the main partition 44 is located between two adjacent terminal modules 5, while the limiting partition 45 is located between two adjacent differential pairs of the same terminal module 5. In one embodiment of this example, the frame 43 is a rectangular structure. In other embodiments, the frame can also be a C-shaped structure that only surrounds three sides.

[0070] A first limiting body 46 and a second limiting body 47 are provided on both sides of the main partition 44 and on the inner side of the frame 43 parallel to the main partition 44. The first limiting body 46 is located between two adjacent mounting positions in the third direction, while the second limiting body 47 is located on one side of the mounting position in the second direction. In this embodiment, the second limiting body 47 is integrally connected to the first limiting body 46, and both the first limiting body 46 and the second limiting body 47 are located at the corners of the corresponding mounting positions, thereby forming an interval space between two adjacent second limiting bodies 47 in the third direction and between two adjacent first limiting bodies 46 in the second direction, which facilitates the operator's assembly of the grounding contact 7. In one embodiment of this embodiment, the integrally connected first limiting body 46 and the second limiting body 47 are L-shaped, and the second limiting body 47 only cooperates with one shielding cylinder 71; in other embodiments, the first limiting body 46 and the second limiting body 47 can also be T-shaped, so that the second limiting body 47 can cooperate with two shielding cylinders 71 simultaneously. Connecting the first limiting body 46 and the second limiting body 47 together can enhance its overall strength.

[0071] See appendix Figure 18 In other embodiments, a spring arm structure 72 can be processed on the cylinder wall in the second direction of the shielding cylinder 71, and the spring arm structure 72 can correspond to the space between the two adjacent second limiting bodies 47 in the third direction, so that the spring arm can contact the main partition plate 44, increase the conductive contact area, and play a certain role in preventing the shielding cylinder 71 from moving backward.

[0072] The first limiting body 46 forms a first limiting part 461 at its two ends in the third direction, which limits the shielding cylinder 71 in the third direction. The second limiting body 47 forms a second limiting part 471 at its end in the second direction, which limits the shielding cylinder 71 in the second direction. Both the first limiting part 461 and the second limiting part 471 include a limiting body 4711 and a limiting protrusion 4712 that protrudes from the limiting body 4711 and presses against the shielding cylinder 71. The limiting protrusion 4712 is specifically a semi-cylindrical protrusion extending along the first direction. During the insertion of the shielding cylinder 71, the limiting protrusion 4712 can deform more easily, maintain close contact with the corresponding outer surface of the shielding cylinder 71, and ensure good conductivity and fixation.

[0073] See appendix Figure 13 In addition to fixing the shielding cylinder 71, the first limiting body 46 and the second limiting body 47 also limit its movement. Specifically, the first limiting body 46 and the second limiting body 47 can maintain a certain distance between the cylinder wall of the shielding cylinder 71 with the grounding spring claw and the corresponding main partition 44 or limiting partition 45, thereby maintaining a certain distance between the grounding spring claw and the corresponding main partition 44 and limiting partition 45, ensuring that the contact on the adapter connector can be inserted between the grounding spring claw and the corresponding main partition 44 or limiting partition 45 to form a mating connection.

[0074] See appendix Figure 14 The first limiting body 46 and the second limiting body 47 are both located on the side of the limiting partition 45 away from the insulating shell 3 base 31 in the first direction. The first limiting body 46 and the corresponding limiting partition 45 are offset in the third direction so that the end face of the limiting partition 45 away from the insulating shell 3 base 31 in the first direction can be exposed and abut against the end face of the shielding cylinder 71 in the first direction, thereby limiting the shielding cylinder 71 during the installation process.

[0075] See appendix Figure 7 and attached Figure 14Limiting posts 34 are provided on the base 31 of the insulating shell 3. Two limiting posts 34 correspond to each mounting position. The end face of the limiting post 34 in the first direction is aligned with the end face of the limiting partition 45 away from the base 31 of the insulating shell 3 in the first direction. The limiting posts 34 and the limiting partition 45 respectively stop and limit the two cylinder walls of the shielding cylinder 71 in the third direction, making the shielding cylinder 71 more stable. The limiting posts 34 can also be provided on the shielding shell 4 instead of the insulating shell 3. However, providing the limiting posts 34 on the insulating shell 3 allows the insulating shell 3 and the shielding shell 4 to form a cross-fitting structure, preventing the shielding shell 4 from shaking relative to the insulating shell 3 and improving the assembly firmness of the shielding shell 4 and the insulating shell 3. Both the limiting posts 34 and the limiting partition 45 can limit the shielding cylinder 71 in the first direction during assembly; therefore, both the limiting posts 34 and the limiting partition 45 constitute a limiting structure.

[0076] During assembly, the shielding shell 4 is first installed into the insulating shell 3, then each grounding contact 7 is installed into the shielding shell 4, and finally each terminal module is installed into the insulating shell 3. The terminal modules are used to press the grounding contacts 7 and the shielding shell 4 together, so that the grounding contacts 7 and the shielding shell 4 can be limited on both sides in the first direction to maintain stability. After the terminal modules are installed, the shielding cylinder 71 and the shielding sheet 6 in the terminal module are connected by a conductive connection structure, so that each shielding sheet 6 shares a common ground.

[0077] See appendix Figure 15 The conductive connection structure includes a slot 61 disposed on the shielding sheet 6, and the shielding cylinder 71 can be inserted into the corresponding slot 61 on its third-direction upward wall. The two side walls of the slot 61, from the opening to the bottom, consist of a guide portion 611, a contact portion 612, and an adjustment portion 613. The opening of the slot 61 is wider, while the width at the contact portion 612 is narrower. The guide portion 611 transitions from the opening to the contact portion 612, and is specifically a beveled or arc-shaped edge, used to guide the shielding cylinder 71 during assembly, ensuring accurate engagement between the shielding cylinder 71 and the contact portion 612. The guide portions 611 on the two side walls of the slot 61 are of unequal length; the longer guide portion 611 serves as the primary guide for inserting the shielding cylinder 71, and the shorter guide portion serves as the secondary guide.

[0078] The slot width at the adjustment portion 613 of the slot 61 is greater than the slot width at the contact portion 612. The contact portion 612 forms a contact point for tight contact with the corresponding cylinder wall of the shielding cylinder 71. This ensures effective contact between the shielding sheet 6 and the shielding cylinder 71, achieving good conductivity, while also reducing the contact area, thereby reducing assembly resistance and simplifying assembly. The sidewall of the slot 61 smoothly transitions from the guide portion 611, the contact portion 612 to the adjustment portion 613, facilitating the insertion of the shielding cylinder 71 and reducing the risk of generating metal wires or metal shavings during assembly.

[0079] On the shielding plate 6, two slots 61 that mate with the same shielding cylinder 71 form a slot pair. A cantilever naturally forms between adjacent slot pairs; this cantilever is the second cantilever structure 64. The length of the second cantilever structure 64 can be controlled by the length of the adjusting part 613. A longer second cantilever structure 64 results in greater deformation capacity and less resistance when assembling the shielding cylinder 71. However, excessive deformation capacity of the second cantilever structure 64 may lead to insufficient contact pressure between the contact part 612 and the shielding cylinder 71, preventing a reliable electrical connection. Therefore, the length of the second cantilever structure 64 needs to be precisely controlled. Especially for the second cantilever structure 64 located at the edge of the shielding plate 6, which only contacts the shielding cylinder 71 on one side and has no other support on the other side, its length needs to be shorter to ensure sufficient strength.

[0080] To balance assembly resistance and contact reliability, the depths of the two slots 61 in the same slot pair can be set to different values. This ensures that the assembly resistance is not too high and that a reliable electrical connection is guaranteed. The depth of the slots 61 can be adjusted appropriately at different locations as needed, or the depth can be set to the same value. Since the contact portions 612 of each slot 61 are on the same plane, the depth of the slots 61 can be adjusted by changing the length of the adjusting portion 613.

[0081] While increasing the depth of slot 61 can improve the cantilever's deformation capability, excessive depth may prevent the shielding sheet 6 from fully covering the signal terminal 54 in the second direction, affecting SI performance. In this embodiment, a deformation adjustment groove 65 is provided at the end of the second cantilever structure 64. The deformation adjustment groove 65 at least covers the area of ​​the corresponding slot 61 contact portion 612, thereby forming a forked structure at the end of the second cantilever structure 64. This allows the end of the second cantilever structure 64 to have strong deformation capability in the third direction, reducing assembly resistance and thus simplifying assembly. Furthermore, it ensures that the depth of slot 61 is not too large, guaranteeing that the signal terminal 54 is fully covered by the shielding sheet 6. The shape and depth of the deformation adjustment groove 65 can be set as needed; in other embodiments, the deformation adjustment groove 65 may not be provided.

[0082] During the assembly of the shielding cylinder 71 and the shielding plate 6, the shielding cylinder 71 is mainly guided by the two guide portions 611 located on its inner side. Therefore, the guide portion 611 on the outer side of the shielding cylinder 71, that is, the guide portion 611 on the second cantilever structure 64, can be relatively short, just enough to play a secondary auxiliary guiding role. Shortening the guide portion 611 on the second cantilever structure 64 helps to reduce the width of the second cantilever structure 64, thereby making the overall layout of the connector more compact.

[0083] On the shielding sheet 6, a slot 62 is provided between two slots 61 that mate with the same shielding cylinder 71. This slot 62 also allows the portion between the slot 62 and the adjacent slot 61 to form a cantilever, which is a first cantilever structure 63. The first cantilever structure 63 facilitates the assembly of the shielding cylinder 71. One, two, or three slots 62 can be provided, and the shape of the slot 62 can be determined as needed, thereby obtaining a first cantilever structure 63 that meets the usage requirements between the slot 62 and the slot 61. A reinforcing protrusion 532 protruding along the thickness direction of the terminal module 5 is provided on the insulator 53 at the position corresponding to the signal claw 541. The position of a portion of the slots 62 corresponds to the position of the reinforcing protrusion 532. This portion of the slot 62 is used both to form the first cantilever structure 63 and to avoid the reinforcing protrusion 532.

[0084] To facilitate the smooth insertion of the shielding cylinder 71 into the slot 61 on the shielding plate 6, a clearance groove 55 is correspondingly provided on the insulator 53 of the terminal module 5 to avoid the corresponding cylinder wall of the shielding cylinder 71. However, the bottom of the clearance groove 55 abuts against the end face of the shielding cylinder 71 in the first direction, so that the terminal module can be used to press the shielding cylinder 71 tightly after assembly. The opening of the clearance groove 55 is provided with a guiding slope to guide the shielding cylinder 71 during assembly. Moreover, in the insertion direction, the insulator 53 protrudes from the shielding plate 6. During the assembly process, the shielding cylinder 71 is first guided by the slope of the opening of the clearance groove 55, and then guided by the guide part 611 on the shielding plate 6.

[0085] In this invention, the grounding contact 7 is first assembled onto the shielding shell 4, and the grounding contact 7 is fixed by the tight fit between the limiting part on the shielding shell 4 and the outer wall of the shielding cylinder 71. Then, the grounding contact 7 is connected to the shielding sheet 6 through a conductive connection structure. Compared with the prior art, which fixes the grounding contact 7 onto the terminal module, the assembly of the grounding contact 7 in this invention is easier, and the structure of the grounding contact 7 is simpler and easier to process and manufacture.

[0086] See appendix Figure 16 and attached Figure 17On the grounding contact 7, the grounding spring claw includes a first grounding spring claw 73 and a second grounding spring claw 74. The first grounding spring claw 73 is located on one side of the corresponding differential pair in the second direction, and the second grounding spring claw 74 is located on one side of the corresponding differential pair in the third direction. The signal spring claw 541 in the differential pair has a smaller projected area in the second direction, so its radiation in the second direction is also less. Therefore, only one first grounding spring claw 73 in this direction is needed to meet the requirements. The signal spring claw 541 in the differential pair has a larger projected area in the third direction, so its radiation in the third direction is also greater. Therefore, at least two second grounding spring claws 74 in this direction are needed to meet the requirements.

[0087] In this embodiment, two second grounding spring claws 74 are provided on the corresponding side of the grounding contact 7, and these two second grounding spring claws 74 are aligned with the two signal spring claws 541 in the corresponding differential pair in the third direction. This satisfies the shielding requirements and also provides sufficient spacing between the two second grounding spring claws 74 to widen their roots, thereby ensuring better strength of each individual second grounding spring claw 74. Of course, in other embodiments, three second grounding spring claws 74 may be provided on the corresponding side of the grounding contact 7, which will not be elaborated here.

[0088] In this embodiment, the grounding contact 7 has two forms, namely grounding contact A and grounding contact B. Grounding contact A is provided with first grounding spring claws 73 on both sides in the second direction and second grounding spring claws 74 on only one side in the third direction. Grounding contact B is provided with first grounding spring claws 73 on both sides in the second direction and second grounding spring claws 74 on both sides in the third direction.

[0089] Taking one of the terminal modules as an example, the grounding contact B is only provided at the differential pair at one end in the third direction, and the grounding contact A is provided at the other differential pairs. The side of the grounding contact A without the second grounding spring claw 74 is shielded by the second grounding spring claw 74 on the adjacent grounding contact 7. In this way, each differential pair can be surrounded by the grounding spring claw, ensuring a good shielding effect. It is also conducive to the close arrangement of the grounding contacts 7, improving the overall structural compactness of the connector.

[0090] Of course, in other embodiments, all grounding contacts 7 can be grounding contacts B. In this embodiment, the number of limiting posts 34 on the insulating shell 3 needs to be increased to limit the grounding contacts 7. In other embodiments, grounding contacts 7 can be used in conjunction with grounding contacts C and grounding contacts B. Grounding contact C has a first grounding spring claw 73 on only one side in the second direction and a second grounding spring claw 74 on only one side in the third direction. The combination of grounding contact C and grounding contact B is similar to the combination of grounding contact A and grounding contact B, and will not be described in detail here.

[0091] In this embodiment, the wall of the shielding cylinder 71 in grounding contact A, which is not provided with grounding spring claws, can also be used to block and limit the corresponding limiting plate 45 in the first direction. However, since the shielding cylinder 71 in grounding contact B does not have a wall without grounding spring claws, the corresponding limiting plate 45 needs to be offset from the grounding spring claws on grounding contact B to cooperate with the end face of its shielding cylinder 71 in the first direction.

[0092] On the grounding contact 7, taking grounding contact A as an example, the height of the first grounding spring claw 73 in the first direction is less than that of the second grounding spring claw 74. This is because the first grounding spring claw 73 needs to avoid the protruding ribs on the insulating shell 3, and the shielding requirement of the signal spring claw 541 in the second direction is smaller. However, the first grounding spring claw 73 also needs to have a sufficiently long elastic deformation length so that it can deform normally when it mates with the contact on the adapter connector. Therefore, in this embodiment, notches 75 are provided on both sides of the first grounding spring claw 73 on the shielding cylinder 71 to extend the effective length of the first grounding spring claw 73 so that the first grounding spring claw 73 can more easily undergo elastic deformation.

[0093] For grounding contact A, the wall of its shielding cylinder 71 without grounding claws is lower than the rest of the wall at the end facing the base 31 of the insulating shell 3, so that the limiting partition 45 on the shielding shell 4 is larger in the first direction to provide a wider range of shielding.

[0094] Specific embodiment 2 of the high-speed backplane connector provided by this utility model:

[0095] This embodiment is based on Embodiment 1. The difference between this embodiment and Embodiment 1 is that the first limiting body and the second limiting body are set separately. The first limiting body is a crossbeam connecting two adjacent main partitions, and the second limiting body is a protrusion set on the main partition and is located between two adjacent first limiting bodies in the third direction.

[0096] Specific embodiment 3 of the high-speed backplane connector provided by this utility model:

[0097] This embodiment is based on Embodiment 1, but differs in that the first limiting part in this embodiment is a protruding structure on both sides of the limiting partition, and the second limiting part is a protruding structure on both sides of the main partition. The shielding cylinder is completely inserted into the space enclosed by the main partition and the limiting partition, or the space enclosed by the main partition, the limiting partition, and the frame. In this embodiment, the limiting partition no longer serves to limit the shielding cylinder in the first direction. In this embodiment, four limiting posts are provided at each installation position to limit the four corners of the shielding cylinder in the first direction.

[0098] Specific embodiment 4 of the high-speed backplane connector provided by this utility model:

[0099] This embodiment is based on Embodiment 1. The difference between this embodiment and Embodiment 1 is that no limiting post is set in this embodiment. Instead, the limiting partition is used to limit the shielding cylinder in the first direction.

[0100] Specific embodiment 5 of the high-speed backplane connector provided by this utility model:

[0101] This embodiment is based on Embodiment 1. The difference between this embodiment and Embodiment 1 is that no limiting post is set in this embodiment, nor is a limiting partition used to limit the shielding cylinder. Instead, protrusions are set on both sides of the main partition in the first direction. These protrusions correspond to the four corners of the shielding cylinder. When the shielding cylinder is installed, the protrusions can provide limiting for the shielding cylinder in the first direction.

[0102] Specific embodiment 6 of the high-speed backplane connector provided by this utility model:

[0103] This embodiment is based on Embodiment 1. The difference between this embodiment and Embodiment 1 is that the mounting position in this embodiment is an insertion hole set on the main frame, and each inner sidewall of the insertion hole constitutes a limiting part.

[0104] Specific embodiment 7 of the high-speed backplane connector provided by this utility model:

[0105] This embodiment is based on Embodiment 1, but differs from Embodiment 1 in that the conductive connection structure in this embodiment is a slot located at one end of the base of the shielding cylinder away from the insulating shell, and the shielding sheet can be inserted into the slot and conductively connected to the shielding cylinder.

[0106] Specific embodiment 8 of the high-speed backplane connector provided by this utility model:

[0107] This embodiment is based on Embodiment 1, but differs from Embodiment 1 in that the two side walls of the slot in this embodiment are straight walls, and the shielding cylinder is in surface contact with the side wall of the slot.

[0108] Specific embodiment 9 of the high-speed backplane connector provided by this utility model:

[0109] This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that, see Appendix. Figure 21 and attached Figure 22 In this embodiment, the two ends of the shielding cylinder 71 in the insertion direction are limited by the limiting structure provided on the insulating shell 3 and the limiting matching structure provided on the shielding shell 4, respectively.

[0110] The limiting structure on the insulating shell 3 is a limiting post 34. The structure of the limiting post and its cooperation with the shielding cylinder are the same as in Example 1, and will not be described again.

[0111] See appendix Figure 23 and attached Figure 24 In this embodiment, the shielding shell 4 includes a main frame, on which multiple mounting holes are provided, penetrating along a first direction. Each mounting hole constitutes a mounting position. See Appendix. Figure 20 The shielding cylinder 71 is inserted into the corresponding mounting hole, and the outer side of the shielding cylinder wall is tightly fitted with the side wall of the mounting hole. In this embodiment, the side wall of the mounting hole constitutes a limiting part that allows the shielding shell 4 to communicate with the shielding cylinder 71 and fixes the shielding cylinder 71. See Appendix Figure 19 The shielding cylinder has outwardly protruding mating protrusions 76 on its side for tight engagement with the sidewall of the mounting hole. The mating protrusions 76 have a barbed structure, which can play a good role in preventing backlash.

[0112] At least one limiting fit structure is provided at each mounting hole. In one embodiment of this invention, two limiting fit structures are provided at each mounting hole, and the two limiting fit structures are located on opposite sides of the mounting hole. See Appendix Figure 24 The limiting and fitting structure includes a stop portion 48 and an inwardly turned portion 49. The stop portion 48 is connected to the end of the shielding shell 4 away from the insulating shell and extends inside the mounting hole, thereby stopping and limiting the end of the shielding cylinder 71 away from the insulating shell 3 in the insertion direction. The inwardly turned portion 49 is located at the end of the stop portion 48 and is located inside the corresponding mounting hole, forming a groove-like structure with the sidewall of the mounting hole for clamping the shielding cylinder 71.

[0113] During assembly, each shielding cylinder is first inserted into the corresponding mounting hole from front to back along the first direction. Then, the shielding shell is installed into the insulating shell from back to front along the first direction. Finally, each terminal module is inserted and fixed onto the insulating shell. The terminal modules and the insulating shell are limited in the front-back direction of the shielding shell to keep the shielding shell stable. At the same time, the stop on the shielding shell and the limiting post on the insulating shell limit the front-back direction of the shielding cylinder to keep the shielding cylinder stable.

[0114] See appendix Figure 19A receiving groove 77 is provided at the position corresponding to the stop part 48 of the shielding cylinder 71, and the stop part 48 is engaged with the bottom of the receiving groove 77. During the assembly process, the stop part 48 can be embedded into the receiving groove 77. On the one hand, the cooperation between the stop part 48 and the receiving groove 77 can improve the stability of the shielding cylinder 71, and on the other hand, it can make the rear end of the shielding cylinder 71 as far back as possible, so as to facilitate contact and conduction with the shielding plate on the terminal module.

[0115] In other embodiments, the protrusion can also be provided on the inside of the shielding cylinder to form a tight fit with the inward-turning part.

[0116] In other embodiments, the mating protrusion can be a hemispherical bulge, and the mating protrusion can also be provided on the inward-turned part or the empty side wall of the mounting hole, which can also play the role of enabling good conductivity between the shielding cylinder and the shielding shell.

[0117] In other embodiments, the shielding cylinder or shielding shell may not have any mating protrusions, and the shielding cylinder may be in contact with the side wall of the mounting hole.

[0118] In other embodiments, the limiting fit structure includes only a stop portion and does not have an inward turning portion.

[0119] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-speed backplane connector, comprising a terminal module (5), an insulating shell (3), and a shielding shell (4), wherein the terminal module (5) includes an insulator (53), a shielding plate (6) fixed on the insulator (53), and signal terminals (54), the signal terminals (54) being arranged in pairs to form differential pairs, and the high-speed backplane connector further includes a shielding structure for shielding the differential pairs, characterized in that, The shielding structure includes shielding cylinders (71) that correspond one-to-one with the differential pairs and grounding spring claws provided on at least two mutually perpendicular cylinder walls of the shielding cylinders (71). The shielding cylinders (71) and the shielding plates (6) are in contact and connected. The shielding shell (4) includes a main frame. The main frame is provided with mounting positions for inserting the shielding cylinders (71). Each mounting position is provided with a limiting part that closely matches the corresponding side of the shielding cylinders (71) so that the shielding cylinders (71) and the shielding shell (4) are connected and fixed.

2. The high speed backplane connector of claim 1, wherein, The insulating shell (3) and / or shielding shell (4) are provided with a limiting structure for blocking one end of the shielding cylinder (71) in the mating direction of the high-speed backplane connector, and the other end of the shielding cylinder (71) in the mating direction of the high-speed backplane connector is blocked by the terminal module (5).

3. The high speed backplane connector of claim 2, wherein, The main frame includes a frame (43), a main partition (44), and a limiting partition (45) perpendicular to the main partition (44). The main partition (44) and the limiting partition (45) divide the space within the frame (43) to form various mounting positions. The main partition (44) is located between adjacent end sub-modules (5), and the limiting partition (45) is located between the signal claws (541) of two adjacent differential pairs of the same terminal module (5). The limiting partition (45) and the shielding cylinder (71) at the corresponding mounting position are engaged in a stop-fitting cooperation in the mating direction of the high-speed backplane connector. The limiting partition (45) constitutes a limiting structure on the shielding shell (4).

4. The high speed backplane connector of claim 3, wherein, A first limiting body (46) and a second limiting body (47) are provided on the main partition (44) and on the inner side of the frame (43) parallel to the main partition (44). The mating direction of the high-speed backplane connector is defined as the first direction, the thickness direction of the terminal module (5) is defined as the second direction, and the direction perpendicular to both the first and second directions is defined as the third direction. The first limiting body (46) is located between two adjacent shielding cylinders (71) in the third direction, and both ends of the first limiting body (46) in the third direction are provided for the corresponding shielding cylinders (71) in the third direction. The first limiting part (461) and the second limiting body (47) are provided on one side of the shielding cylinder (71) in the second direction, and the end of the second limiting body (47) in the second direction are provided with a second limiting part (471) for limiting the corresponding shielding cylinder (71) in the second direction. The first limiting body (46) and the limiting partition (45) at the corresponding position are offset in the third direction so that the end face of the limiting partition (45) facing the shielding cylinder (71) in the first direction is exposed so that it can stop and cooperate with the corresponding shielding cylinder (71) in the first direction.

5. The high speed backplane connector of claim 4, wherein, The first limiting body (46) and the second limiting body (47) are arranged in a group and are integrally connected. The inside corner structure formed by the first limiting body (46) and the second limiting body (47) cooperates with the outside corner structure formed by two mutually perpendicular cylinder walls on the shielding cylinder (71).

6. The high speed backplane connector of claim 1, wherein, The insulating shell (3) is provided with a limiting structure for blocking one end of the shielding cylinder (71) in the mating direction of the high-speed backplane connector, and the shielding shell (4) is provided with a limiting structure for blocking the other end of the shielding cylinder (71) in the mating direction of the high-speed backplane connector.

7. The high speed backplane connector of claim 6, wherein, The limiting fit structure includes a stop part (48) and an inwardly turned part (49) located at the end of the stop part (48). The stop part (48) is located at one end of the shielding tube (71) away from the insulating shell (3) in the mating direction and stops and limits the shielding tube (71) at that end. The inwardly turned part is located on the inner side of the shielding tube and forms a groove-shaped structure with the inner sidewall of the corresponding mounting position for clamping the shielding tube (71).

8. The high speed backplane connector of claim 7, wherein, The shielding cylinder has outwardly protruding fitting protrusions (76) on its side for tight fit with the inner wall of the mounting position, and the inner wall of the mounting position forms a limiting part.

9. The high speed backplane connector of claim 7, wherein, The shielding cylinder (71) is provided with a receiving groove (77) for accommodating the stopping part (48) at the position corresponding to the stopping part (48), and the bottom of the stopping part (48) and the receiving groove (77) are engaged to stop each other.

10. The high speed backplane connector of any of claims 2-9, wherein, Limiting posts (34) are provided on the insulating shell (3). At least one limiting post (34) is provided at each mounting position. The end face of the limiting post (34) and the end face of the shielding cylinder (71) at the corresponding mounting position are engaged in a stop-fitting relationship in the mating direction of the high-speed backplane connector. The limiting post (34) constitutes a limiting structure on the insulating shell (3).

11. The high speed backplane connector of any of claims 1-5, wherein, The limiting part includes a limiting body (4711) and a limiting protrusion (4712) that protrudes from the limiting body (4711) and presses against the shielding cylinder (71).

12. The high speed backplane connector of any of claims 1-9, wherein, One end of the signal terminal (54) extends out of the insulator (53) and forms a signal claw (541). The shield (6) is provided with a slot (61). The shielding cylinder (71) includes two first cylinder walls and two second cylinder walls arranged opposite to each other. The first cylinder wall is perpendicular to the second cylinder wall. The second cylinder wall is located between the signal claws (541) of two adjacent differential pairs on the same terminal module (5). The second cylinder wall is inserted into the corresponding slot (61).

13. The high speed backplane connector of claim 12, wherein, The two sides of the slot (61) include a guide part (611) and a contact part (612) arranged sequentially from the slot opening to the bottom of the slot. The width of the slot (61) at the slot opening is greater than the width of the slot (61) at the contact part (612). The guide part (611) is a beveled or arc-shaped edge used to guide the shielding cylinder (71) from the slot opening to the contact part (612).

14. The high speed backplane connector of claim 12, wherein, Two slots (61) that mate with the same shielding tube (71) form a slot pair, and the two slots (61) in at least one slot pair on the same shielding sheet (6) have different slot depths.

15. The high speed backplane connector of claim 12, wherein, The shielding plate (6) has a slot (62) between two slots (61) that mate with the same shielding cylinder (71), and the shielding plate (6) forms a first cantilever structure (63) that is easy to deform between the slot (62) and the adjacent slot (61).

16. The high speed backplane connector of claim 14, wherein, The insulator (53) is provided with a reinforcing protrusion (532) protruding along the thickness direction of the terminal module (5) at the position corresponding to the signal claw (541), and at least one slot (62) also serves as a clearance slot for avoiding the reinforcing protrusion (532).

17. The high speed backplane connector of claim 12, wherein, Two slots (61) that cooperate with the same shielding cylinder (71) form a slot pair. The portion between adjacent slot pairs on the shielding sheet (6) forms a second cantilever structure (64). The end of the second cantilever structure (64) is provided with a deformation adjustment groove (65) so that the end of the second cantilever structure (64) forms a fork-shaped structure that is easy to deform in the wall thickness direction of the second cylinder wall.

18. The high speed backplane connector of any of claims 1-9, wherein, One end of the signal terminal (54) extends out of the insulator (53) and forms a signal spring claw (541). The shielding cylinder (71) includes two first cylinder walls and two second cylinder walls arranged opposite to each other. The first cylinder wall is perpendicular to the second cylinder wall. The second cylinder wall is located between the signal spring claws (541) of two adjacent differential pairs on the same terminal module (5). Grounding spring claws are provided on both first cylinder walls of the same shielding cylinder (71). Grounding spring claws are provided on at least one second cylinder wall of the same shielding cylinder (71).

19. The high speed backplane connector of claim 18, wherein, The grounding spring claw set on the first cylinder wall is the first grounding spring claw (73), and the grounding spring claw set on the second cylinder wall is the second grounding spring claw (74). The number of second grounding spring claws (74) set on the same second cylinder wall is at least two.

20. The high speed backplane connector of claim 19, wherein, There are two second grounding spring claws (74) set on the same second cylinder wall. The two second grounding spring claws (74) are aligned with the two signal spring claws (541) in the corresponding differential pair in the wall thickness direction of the second cylinder wall. The end of the second grounding spring claw (74) connected to the shielding cylinder (71) is its root, and the end of the second grounding spring claw (74) away from the shielding cylinder (71) is its end. The root width of the second grounding spring claw (74) is greater than the end width of the second grounding spring claw (74).

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