High-speed backboard connector

Abstract

The invention 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 invention, 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] The present invention belongs to the field of connecting devices, and particularly relates to a high-speed backplane connector. Background Art

[0002] High-speed backplane connectors are widely used in core communication devices such as switches and servers. With the improvement of communication transmission rates, high-speed backplane connectors need to have stronger crosstalk resistance.

[0003] See the attached Figure 1 and the attached Figure 2 , the existing high-speed backplane connectors generally include a terminal module 5 and an insulating housing 3 for assembling the terminal module 5. The high-speed backplane connector is shielded by a shielding sheet 6 and a shielding housing 4. The shielding sheet 6 is installed on one side or both sides in the thickness direction of the terminal module 5 to shield signals between different terminal modules 5; the shielding housing 4 is installed in the insulating housing 3, and it is provided with a plurality of cells. The signal claws of the differential pairs on the terminal module 5 are located in the corresponding cells, so that after being inserted into the mating connector, the cells can shield the signals at the signal claws 541.

[0004] In some high-speed backplane connectors, the above shielding method cannot meet their usage requirements, and it is also necessary to provide grounding claws between the signal claws 541 of adjacent differential pairs on the same terminal module 5 and between the signal claws 541 of adjacent differential pairs on different terminal modules, and the grounding claws are used to absorb the radiation signals of the signal claws to further enhance the shielding effect. The grounding claws between the signal claws of adjacent differential pairs on different terminal modules are the first grounding claws 73, and the grounding claws between the signal claws of adjacent differential pairs on the same terminal module are the second grounding claws 74. The first grounding claws 73 and the second grounding claws 74 together constitute a shielding structure for shielding differential pairs.

[0005] As Figure 3 shown, in this high-speed backplane connector, the first grounding claws 73 are integrally provided on the shielding sheet 6 to play a shielding role between the signal claws 541 of adjacent differential pairs on different terminal modules 5; the second grounding claws 74 are provided on a common grounding sheet 8 arranged perpendicular to the shielding sheet. There are a plurality of second grounding claws 74 on the common grounding sheet 8, and each second grounding claw 74 is used to play a shielding role between the signal claws 541 of adjacent differential pairs on the same terminal module 5. Shielding sheets 6 are provided on both sides in the thickness direction of the terminal module 5 in this high-speed backplane connector. During the assembly process, the common grounding sheet 8 needs to be fixedly installed on the terminal module first, and needs to be grounded and conductively connected to the shielding sheet 6, and then be installed into the insulating housing 3 together with the terminal module 5.

[0006] Therefore, two pairs of clamping claws are provided on the common ground piece 8 corresponding to each terminal module. The two pairs of clamping claws are the first clamping claws 81 and the second clamping claws 82 respectively. The two first clamping claws 81 are located between the two second clamping claws 82, and the height of the first clamping claws 81 is higher than that of the second clamping claws 82. A stepped bending structure 68 is provided on the shielding piece 6, which divides the shielding piece 6 into a first body 66 and a second body 67. The distance between the two first bodies 66 in the same terminal module is smaller than the distance between the second bodies 67. The grounding spring claws are connected to the second body 67. During the assembly process, the two second clamping claws 82 are respectively abutted against the outer sides of the two second bodies 67, and the two first clamping claws 81 pass through the openings at the stepped bending structure 68 and are respectively abutted against the outer sides of the two first bodies 66.

[0007] In the existing high-speed backplane connector of this kind, the clamping claws have a slender structure, a large number and dense distribution, resulting in a high processing difficulty of the common ground piece; moreover, the strength of the clamping claws is poor, and problems such as bending failure are likely to occur during the assembly process, resulting in a high assembly difficulty of the common ground piece. Moreover, in order to ensure the stability of the common ground piece, a slot for inserting the common ground piece is opened on the insulator of the terminal module, and a bulge 83 for tightly fitting with the inner wall of the slot is provided on the common ground piece to improve the bonding strength between the common ground piece and the terminal module. However, the provided bulge will further increase the manufacturing difficulty of the common ground piece, and if the bulge is too small, the bonding strength between the common ground piece and the terminal module will be weak, while if the bulge is too large, the assembly will be too tight and difficult. The manufacturing difficulty and assembly difficulty of the common ground piece in the existing high-speed backplane connector are both high, resulting in a high production cost of the applied high-speed backplane connector. Summary of the Invention

[0008] The purpose of the present invention is to provide a high-speed backplane connector to solve the technical problem that the manufacturing and assembly difficulties of the common ground piece for providing an assembly basis for the grounding spring claws in the existing high-speed backplane connector are both high, resulting in a high production cost of the high-speed backplane connector.

[0009] To achieve the above object, the technical solution of the high-speed backplane connector provided by the present invention is: A high-speed backplane connector includes a terminal module, an insulating housing, and a shielding housing. The terminal module includes an insulator, a shielding piece, and signal terminals fixed on the insulator. The signal terminals are arranged in pairs to form differential pairs. The high-speed backplane connector further includes a shielding structure for shielding the differential pairs. The shielding structure includes shielding cylinders corresponding to the differential pairs one by one and grounding spring claws provided on at least two mutually perpendicular cylindrical walls of the shielding cylinders. The shielding cylinders are in contact and conduction with the shielding piece. The shielding housing includes a main body frame. Installation positions for inserting the shielding cylinders are provided on the main body frame, and limiting portions for tightly fitting with the corresponding sides of the shielding cylinders to make the shielding cylinders conduct and fixed with the shielding housing are provided at each installation position.

[0010] As a further improvement, a limiting structure is provided on the insulating shell and / or the shielding shell for blocking and mating with one end of the shielding cylinder in the mating direction of the high-speed backplane connector, and the other end of the shielding cylinder in the mating direction of the high-speed backplane connector is blocked and mated with the terminal module.

[0011] As a further improvement, one end of the signal terminal extends out of the insulator to form a signal spring claw. The main body 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 inside the frame to form respective installation positions. The main partition is located between adjacent terminal modules, and the limiting partition is located between the signal spring claws of two adjacent differential pairs of the same terminal module. The limiting partition is blocked and mated with the shielding cylinder at the corresponding installation position in the mating direction of the high-speed backplane connector, and the limiting partition constitutes the limiting structure on the shielding shell.

[0012] As a further improvement, first limiting bodies and second limiting bodies are provided on the main partition and the inner side of the frame portion parallel to the main partition. Define the mating direction of the high-speed backplane connector as the first direction, the thickness direction of the terminal module as the second direction, and the direction perpendicular to both the first direction and the second direction as the third direction. The first limiting body is between two adjacent shielding cylinders in the third direction, and both ends of the first limiting body in the third direction are provided with first limiting portions for limiting the corresponding shielding cylinder in the third direction. The second limiting body is on one side of the shielding cylinder in the second direction, and both ends of the second limiting body in the second direction are provided with second limiting portions for limiting the corresponding shielding cylinder in the second direction. The first limiting body and the limiting partition at the corresponding position are staggered in the third direction so that the end face of the limiting partition facing the shielding cylinder in the first direction is exposed, thereby enabling it to be blocked and mated with the corresponding shielding cylinder in the first direction.

[0013] As a further improvement, the first limiting bodies and the second limiting bodies are arranged in groups, and the first limiting bodies and the second limiting bodies in the same group are integrally connected. The internal angle structure formed by the first limiting body and the second limiting body cooperates with the external angle structure formed by two mutually perpendicular cylindrical walls on the shielding cylinder.

[0014] As a further improvement, a limiting structure is provided on the insulating shell for blocking and mating with one end of the shielding cylinder in the mating direction of the high-speed backplane connector, and a limiting mating structure is provided on the shielding shell for blocking and mating with the other end of the shielding cylinder in the mating direction of the high-speed backplane connector.

[0015] As a further improvement, the limiting mating structure includes a blocking portion and an inward-turning portion located at the end of the blocking portion. The blocking portion is located at one end of the shielding cylinder away from the insulating shell in the mating direction and blocks and limits the shielding cylinder at this end. The inward-turning portion is located inside the shielding cylinder, and the inward-turning portion and the side wall of the corresponding installation position form a groove-like structure for clamping the shielding cylinder.

[0016] As a further improvement, a mating protrusion protruding outward is provided on the side surface of the shielding cylinder for tightly mating with the inner wall surface of the mounting position, and the inner wall surface of the mounting position constitutes a limiting portion.

[0017] As a further improvement, a receiving groove for receiving the stopping portion is provided at a position corresponding to the stopping portion of the shielding cylinder, and the stopping portion is in stopping cooperation with the bottom of the receiving groove.

[0018] As a further improvement, a limiting post is provided on the insulating housing, at least one limiting post is correspondingly provided for each mounting position, and the end surface of the limiting post is in stopping cooperation with the end surface of the shielding cylinder at the corresponding mounting position in the mating direction of the high-speed backplane connector, and the limiting post constitutes a limiting structure on the insulating housing.

[0019] As a further improvement, the limiting portion includes a limiting main body and a limiting protrusion protruding from the limiting main body and in top pressure cooperation with the shielding cylinder.

[0020] As a further improvement, one end of the signal terminal extends out of the insulator to form a signal spring claw, a slot is provided on the shielding piece, the shielding cylinder includes two first cylinder walls arranged oppositely and two second cylinder walls arranged oppositely, the first cylinder wall is perpendicular to the second cylinder wall, the second cylinder wall is located between the signal spring claws of two adjacent differential pairs on the same terminal module, and the second cylinder wall is in plug-in cooperation with the corresponding slot.

[0021] As a further improvement, the two side walls of the slot include a guiding portion and a contact portion arranged in sequence from the slot opening to the bottom of the slot, the width of the slot at the slot opening is greater than the width of the slot at the contact portion, and the guiding portion is an inclined side or an arc side for guiding the shielding cylinder to transition from the slot opening position to the contact portion.

[0022] As a further improvement, the two slots cooperating with the same shielding cylinder form a slot pair, and the slot depths of the two slots in at least one slot pair on the same shielding piece are different.

[0023] As a further improvement, a slotted opening is provided on the shielding piece between the two slots cooperating with the same shielding cylinder, and a first cantilever structure that is easy to deform is formed on the shielding piece between the slotted opening and the adjacent slot.

[0024] As a further improvement, a reinforcing protrusion protruding in the thickness direction of the terminal module is provided at a position corresponding to the signal spring claw of the insulator, and at least one slotted opening also serves as an avoidance slotted opening for avoiding the reinforcing protrusion.

[0025] As a further improvement, the two slots cooperating with the same shielding cylinder form a slot pair, the portion between adjacent slot pairs on the shielding piece forms a second cantilever structure, and a deformation adjustment groove is provided at the end of the second cantilever structure so that the end of the second cantilever structure forms a fork-like structure that is easy to deform in the wall thickness direction of the second cylinder wall.

[0026] 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 relatively arranged first cylinder walls and two relatively arranged second cylinder walls. 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. Ground spring claws are provided on both first cylinder walls of the same shielding cylinder, and ground spring claws are provided on at least one second cylinder wall of the same shielding cylinder.

[0027] As a further improvement, the ground spring claw provided on the first cylinder wall is the first ground spring claw, the ground spring claw provided on the second cylinder wall is the second ground spring claw, and the number of second ground spring claws provided on the same second cylinder wall is at least two.

[0028] As a further improvement, the number of second ground spring claws provided on the same second cylinder wall is two. The two second ground spring claws are respectively aligned with the two signal spring claws in the corresponding differential pair in the thickness direction of the second cylinder wall. The end of the second ground spring claw connected to the shielding cylinder is its root, and the end of the second ground spring claw far from the shielding cylinder is its end. The width of the root of the second ground spring claw is greater than the width of the end of the second ground spring claw.

[0029] The beneficial effects are as follows: The high-speed backplane connector provided by the present invention belongs to an improved invention. The high-speed backplane connector arranges the ground spring claws on the shielding cylinder. The shielding cylinder can be assembled on the shielding shell through cooperation with the limiting part on the shielding shell. Only a conductive connection structure needs to be provided between the shielding cylinder and the shielding sheet to make them conduct, and there is no need to set up a complex structure to firmly connect them. Therefore, the structure of the shielding cylinder is simpler than the common ground sheet in the prior art, which is convenient for processing and manufacturing. Moreover, during the assembly process, since the shielding cylinder is inserted into the corresponding installation position, the assembly difficulty is smaller, and the assembly efficiency can be improved. Therefore, the production cost of this high-speed backplane connector is also lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a structural schematic diagram of the prior art; Figure 2 is a partial structural schematic diagram of the prior art; Figure 3 is an assembly relationship schematic diagram of the terminal module and the common ground sheet in the prior art; Figure 4 is a structural schematic diagram of Embodiment 1 of the high-speed backplane connector of the present invention; Figure 5 is a structural schematic diagram of the terminal module of Embodiment 1 of the high-speed backplane connector of the present invention; Figure 6 is an assembly structural schematic diagram of the shielding shell and the insulating shell of Embodiment 1 of the high-speed backplane connector of the present invention; Figure 7 Structural schematic diagram of the insulating housing of Embodiment 1 of the high-speed backplane connector of the present invention; Figure 8 Structural schematic diagram of the shielding housing of Embodiment 1 of the high-speed backplane connector of the present invention; Figure 9 Partial structural schematic diagram of the shielding housing of Embodiment 1 of the high-speed backplane connector of the present invention; Figure 10 Assembly structural schematic diagram of the terminal module, shielding housing and insulating housing of Embodiment 1 of the high-speed backplane connector of the present invention; Figure 11 Assembly structural schematic diagram of the shielding housing and grounding contact of Embodiment 1 of the high-speed backplane connector of the present invention; Figure 12 Partial structural schematic diagram of the assembly of the shielding housing and grounding contact of Embodiment 1 of the high-speed backplane connector of the present invention; Figure 13 Cross-sectional view of Embodiment 1 of the high-speed backplane connector of the present invention from one perspective; Figure 14 Cross-sectional view of Embodiment 1 of the high-speed backplane connector of the present invention from another perspective; Figure 15 Partial structural schematic diagram of the terminal module of Embodiment 1 of the high-speed backplane connector of the present invention; Figure 16 Structural schematic diagram of the grounding contact A of Embodiment 1 of the high-speed backplane connector of the present invention; Figure 17 Structural schematic diagram of the grounding contact B of Embodiment 1 of the high-speed backplane connector of the present invention; Figure 18 Schematic diagram of the elastic arm structure provided on the grounding contact of Embodiment 1 of the high-speed backplane connector of the present invention; Figure 19 Structural schematic diagram of the grounding contact of Embodiment 9 of the high-speed backplane connector of the present invention; Figure 20 Assembly structural schematic diagram of the insulating housing and shielding housing of Embodiment 9 of the high-speed backplane connector of the present invention; Figure 21 Partial cross-sectional view of Embodiment 9 of the high-speed backplane connector of the present invention; Figure 22 Partial cross-sectional view of another perspective of Embodiment 9 of the high-speed backplane connector of the present invention; Figure 23 Partial cross-sectional view of the shielding housing of Embodiment 9 of the high-speed backplane connector of the present invention; Figure 24Schematic diagram of a partial structure of the shielding case of Embodiment 9 of the high-speed backplane connector of the present invention.

[0031] Description of reference numerals: 1. Fixed piece; 2. Positioning plate; 3. Insulating shell; 31. Substrate; 32. Guiding buckle; 33. Guiding groove; 34. Limit post; 4. Shielding shell; 41. Guiding rib; 42. Pressing protrusion; 43. Frame; 44. Main partition; 45. Limit partition; 46. First limiting body; 461. First limiting part; 47. Second limiting body; 471. Second limiting part; 4711. Limiting main body; 4712. Limiting protrusion; 48. Stopping part; 49. Inverted part; 5. Terminal module; 51. Terminal module A; 52. Terminal module B; 53. Insulator; 531. Thermally riveted post; 532. Reinforcing protrusion; 54. Signal terminal; 541. Signal spring claw; 55. Avoidance groove; 6. Shielding sheet; 61. Slot; 611. Guiding part; 612. Contact part; 613. Adjusting part; 62. Slotted opening; 63. First cantilever structure; 64. Second cantilever structure; 65. Deformation adjusting groove; 66. First sheet body; 67. Second sheet body; 68. Step bending structure; 7. Ground contact piece; 71. Shielding cylinder; 72. Spring arm structure; 73. First ground spring claw; 74. Second ground spring claw; 75. Notch; 76. Matching protrusion; 77. Accommodating groove; 8. Common ground sheet; 81. First claw; 82. Second claw; 83. Bulge. Detailed implementation manners

[0032] The present invention will be further described in detail below in conjunction with embodiments.

[0033] To solve the problems in the prior art, the basic concept of the present invention is to use a shielding cylinder as the basis for the assembly of ground spring claws, reducing the manufacturing difficulty and assembly difficulty of the ground contact piece.

[0034] Specific Embodiment 1 of the high-speed backplane connector provided by the present invention: The high-speed backplane connector is a bent wide-side coupled connector. Refer to the attached Figure 4 , and mainly includes a plurality of terminal modules 5, a fixed piece 1, a positioning plate 2, an insulating shell 3 and a shielding shell 4.

[0035] Define the direction in which the high-speed backplane connector is inserted into the mating connector as the first direction, the thickness direction of the terminal module 5 as the second direction, and the direction perpendicular to both the first direction and the second direction as the third direction. The end of the backplane connector where it is inserted into the mating connector is its front end.

[0036] Refer to the attached Figure 5, Each terminal module 5 includes a terminal module A51 and a terminal module B52. Both the terminal module A51 and the terminal module B52 include an insulator 53 and signal terminals 54 fixed to the insulator 53 by injection molding. The terminal module A51 and the terminal module B52 are clamped together along the thickness direction, that is, the second direction. The signal terminals 54 of the two correspond one by one and form a differential pair for transmitting differential signals. The signal terminals 54 extend out of the insulator 53 from the insertion end of the terminal module 5 to form signal spring claws 541. The signal spring claws 541 in the same differential pair are arranged at intervals along the second direction, and the differential pairs in the same terminal module 5 are arranged at intervals along the third direction.

[0037] The terminal module 5 further includes two shielding sheets 6. The two shielding sheets 6 are respectively located on both sides of the terminal module 5 in the second direction, that is, there is a shielding sheet 6 on the side where the terminal module A51 and the terminal module B52 are away from each other. Heat riveting posts 531 are formed on the insulators 53 of the terminal module A51 and the terminal module B52. Connecting holes for the heat riveting posts 531 to pass through are provided at the corresponding positions of the shielding sheets 6. After the shielding sheets 6 are installed on both sides of the terminal module 5, the shielding sheets 6 can be fixed to the terminal module 5 by hot pressing. A perforation for part of the heat riveting posts 531 on the terminal module A51 to pass through is also provided on the terminal module B52. After the part of the heat riveting posts 531 are hot pressed, the terminal module A51 and the terminal module B52 can be firmly connected, improving their stability and ensuring the signal transmission effect of the differential pair.

[0038] See attached Figure 6 , The shielding case 4 is installed in the insulating case 3. The insulating case 3 is used to install and fix each terminal module. The shielding case 4 is used to enhance the shielding effect of each terminal module and achieve the common ground conduction of the shielding sheets 6 of each terminal module. The insulating case 3 is made of plastic, and the shielding case 4 is made of conductive plastic. In other embodiments, the shielding case 4 can also be a plastic case with a conductive layer electroplated or sprayed on its surface, or the shielding case 4 can be a metal case.

[0039] See attached Figure 7 , The insulating case 3 includes a base body 31 and guiding buckle bodies 32 located at both ends of the base body 31 in the third direction. Through holes are provided on the base body 31 for the contact parts on the mating connector to pass through to cooperate with the corresponding signal spring claws 541 or ground spring claws. The space between the two guiding buckle bodies 32 constitutes an installation space for installing each terminal module. A guiding structure for guiding each terminal module 5 and a clamping structure for clamping and fixing each terminal module 5 are provided on the inner side of the guiding buckle body 32. The guiding structure and the clamping structure are both prior arts and will not be elaborated here.

[0040] See attached Figure 8 and attached Figure 9, the shielding case 4 is also installed in the installation space. A guiding groove 33 for guiding the shielding case 4 during the assembly process in the first direction is provided inside the guiding engaging body 32, and a guiding rib 41 for guiding and inserting into the guiding groove 33 is provided at the corresponding position of the shielding case 4. The shielding case 4 and the insulating case 3 are fixed together by close fitting. After assembling each terminal module 5, the terminal module 5 and the insulating case 3 sandwich the shielding case 4 in the middle, thus ensuring the stability of the shielding case 4. However, in order to ensure the firm connection between the shielding case 4 and the insulating case 3 during the assembly process, in this embodiment, a pressing protrusion 42 for closely fitting with the guiding groove 33 is provided on the side wall of the guiding rib 41 to enhance the pressing force between the shielding case 4 and the insulating case 3, and further increase the static friction force between the two.

[0041] See the appendix Figure 1 and in combination with the appendix Figure 16 and the appendix Figure 17 , the high-speed backplane connector further includes a grounding contact 7. The grounding contact 7 includes a shielding cylinder 71 and a grounding spring claw located at one end of the shielding cylinder 71 in the first direction. During use, the grounding contact 7 is sleeved outside the part of the corresponding differential pair extending from the insertion end of the terminal module 5, and each grounding spring claw is arranged around the signal spring claw 541 in the corresponding differential pair. In this embodiment, the grounding contact 7 constitutes a shielding structure for shielding the differential pair.

[0042] See the appendix Figure 10 , the appendix Figure 11 and the appendix Figure 12 , the grounding contact 7 is installed in the shielding case 4, is relatively fixed to the shielding case 4 and is electrically connected to the shielding case 4. The shielding case 4 includes a main frame. Installation positions for inserting each grounding contact 7 are provided on the main frame. The shielding case 4 further includes a limiting portion provided at the installation position. Each side surface of the shielding cylinder 71 corresponds to at least one limiting portion, and the limiting portion is in close fit with the corresponding side surface of the shielding cylinder 71, so that the shielding cylinder 71 is fixed and the shielding cylinder 71 is electrically connected to the shielding case 4.

[0043] Specifically, the main frame of the shielding case 4 includes a frame 43, a main partition 44 and a limiting partition 45 located inside 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 inside the frame 43 to form each installation position. After assembly, the main partition 44 is located between two adjacent terminal modules 5, and the limiting partition 45 is located between two adjacent differential pairs of the same terminal module 5. In one embodiment of this embodiment, the frame 43 is a rectangular structure. In other embodiments, the frame can also be a C-shaped structure that only encloses three sides.

[0044] On both sides of the main partition plate 44 and on the inner side of the border 43 part parallel to the main partition plate 44, a first limiting body 46 and a second limiting body 47 are provided. 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 position, so that an interval space is formed between two adjacent second limiting bodies 47 in the third direction and between two adjacent first limiting bodies 46 in the second direction, which is convenient for the operator to assemble the grounding contact member 7. In an implementation manner of this embodiment, the integrally connected first limiting body 46 and second limiting body 47 are integrally L-shaped, and the second limiting body 47 only cooperates with one shielding cylinder 71; in other implementation manners, the first limiting body 46 and the second limiting body 47 can also be integrally T-shaped, so that the second limiting body 47 can cooperate with two shielding cylinders 71 at the same time. Integrally connecting the first limiting body 46 and the second limiting body 47 can enhance their overall strength.

[0045] See Appendix Figure 18 , in other implementation manners, an elastic arm structure 72 can be processed on the cylinder wall of the shielding cylinder 71 in the second direction, and the elastic arm structure 72 is made to correspond to the interval space between two adjacent second limiting bodies 47 in the third direction, so that the elastic arm can contact the main partition plate 44, increasing the area of conductive contact and being able to play a certain role in preventing the shielding cylinder 71 from retreating.

[0046] The two ends of the first limiting body 46 in the third direction respectively form a first limiting portion 461 for limiting the shielding cylinder 71 in the third direction, and the end of the second limiting body 47 in the second direction forms a second limiting portion 471 for limiting the shielding cylinder 71 in the second direction. Both the first limiting portion 461 and the second limiting portion 471 include a limiting main body 4711 and a limiting protrusion 4712 protruding from the limiting main body 4711 and pressing against the shielding cylinder 71. The limiting protrusion 4712 is specifically a semi-cylindrical protrusion extending along the first direction. During the process of installing the shielding cylinder 71, the limiting protrusion 4712 can more easily deform and maintain close contact with the corresponding outer side surface of the shielding cylinder 71, ensuring good electrical conductivity and fixation.

[0047] See Appendix Figure 13, in addition to fixing the shielding cylinder 71, the first limiting body 46 and the second limiting body 47 also play a role in limiting. Specifically, the first limiting body 46 and the second limiting body 47 can keep a certain distance between the cylinder wall of the shielding cylinder 71 provided with the grounding spring claws and the corresponding main partition 44 or the limiting partition 45, so as to keep a certain distance between the grounding spring claws and the corresponding main partition 44 and the limiting partition 45, ensuring that the contacts on the mating connector can be inserted between the grounding spring claws and the corresponding main partition 44 or the limiting partition 45 to form a plug-in connection.

[0048] See Appendix Figure 14 , both the first limiting body 46 and the second limiting body 47 are located on the side of the limiting partition 45 away from the base 31 of the insulating shell 3 in the first direction. The first limiting body 46 is offset from the corresponding limiting partition 45 in the third direction, so that the end face of the limiting partition 45 away from the base 31 of the insulating shell 3 in the first direction can be exposed to abut against the end face of the shielding cylinder 71 in the first direction, thereby playing a role in limiting the shielding cylinder 71 during the installation process of the shielding cylinder 71.

[0049] See Appendix Figure 7 and Appendix Figure 14 , limiting posts 34 are provided on the base 31 of the insulating shell 3. Two limiting posts 34 correspond to each installation 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 on the insulating shell 3. However, setting the limiting posts 34 on the insulating shell 3 can form an intersecting matching structure between the insulating shell 3 and the shielding shell 4, which can avoid the shaking of the shielding shell 4 relative to the insulating shell 3 and improve 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 the assembly of the shielding cylinder 71. Therefore, both the limiting posts 34 and the limiting partition 45 constitute a limiting structure.

[0050] During the assembly process, first, the shielding shell 4 is 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 module presses the grounding contact 7 and the shielding shell 4, so that both sides of the grounding contact 7 and the shielding shell 4 in the first direction can be limited to maintain stability. After the terminal module is installed, the shielding cylinder 71 is electrically connected to the shielding sheet 6 in the terminal module through a conductive connection structure, so that each shielding sheet 6 is grounded.

[0051] See Appendix Figure 15, the conductive connection structure includes a slot 61 provided on the shielding sheet 6, and the barrel wall of the shielding cylinder 71 in the third direction can be inserted and fitted with the corresponding slot 61. The two side walls of the slot 61 are successively a guiding portion 611, a contact portion 612, and an adjusting portion 613 from the slot opening to the slot bottom. The slot width of the slot opening of the slot 61 is larger, the width at the contact portion 612 is smaller, and the guiding portion 611 transitions from the slot opening position to the contact portion 612. The guiding portion 611 is specifically an inclined side or an arc-shaped side, which is used to guide the shielding cylinder 71 during the assembly process so that the shielding cylinder 71 can accurately cooperate with the contact portion 612. The lengths of the guiding portions 611 on the two side walls of the slot 61 are not equal, and the longer guiding portion 611 is used as the primary guiding for inserting the shielding cylinder 71, and the shorter guiding portion is used as the secondary guiding for inserting the shielding cylinder 71.

[0052] The slot width of the slot 61 at the adjusting portion 613 is larger than that at the contact portion 612. The contact portion 612 forms a contact point for closely contacting the corresponding barrel wall of the shielding cylinder 71. On the one hand, it can ensure the effective contact between the shielding sheet 6 and the shielding cylinder 71 to achieve good electrical conductivity. On the other hand, it can also reduce the contact area, thereby reducing the assembly resistance and the assembly difficulty. The side wall of the slot 61 smoothly transitions from the guiding portion 611, the contact portion 612 to the adjusting portion 613, so as to facilitate the insertion of the shielding cylinder 71 and reduce the risk of generating metal wires or metal chips during the assembly process.

[0053] On the shielding sheet 6, two slots 61 that cooperate with the same shielding cylinder 71 form a slot pair, and a cantilever is naturally formed between two adjacent slot pairs. This cantilever is the second cantilever structure 64, and the length of the second cantilever structure 64 can be controlled by the length of the adjusting portion 613. The longer the length of the second cantilever structure 64, the stronger its deformation ability, and the smaller the resistance encountered during the assembly of the shielding cylinder 71. However, if the deformation ability of the second cantilever structure 64 is too strong, it may cause the contact pressure between the contact portion 612 and the shielding cylinder 71 to be too small to form a reliable electrical connection. Therefore, the length of the second cantilever structure 64 needs to be accurately controlled. Especially for the second cantilever structure 64 located at the edge of the shielding sheet 6, it is only in contact with the shielding cylinder 71 on one side and has no other support on the other side. Therefore, the length of this second cantilever structure 64 needs to be shorter to ensure its sufficient strength.

[0054] In order to reconcile the assembly resistance and the contact reliability, the slot depths of the two slots 61 in the same slot pair can be set to different values, which can ensure that the assembly resistance is not too large and can also ensure a reliable electrical connection. Regarding the slot depth of the slot 61, different adaptive adjustments can be made at different positions according to actual needs. Of course, the slot depths can also be set to the same value. The contact portions 612 of each slot 61 are all on the same plane. Therefore, by changing the length of the adjusting portion 613, the slot depth of the slot 61 can be adjusted.

[0055] Although increasing the depth of the slot 61 can improve the deformation ability of the cantilever, if the depth of the slot 61 is too deep, it may cause the shielding piece 6 to not completely cover the signal terminal 54 in the second direction, affecting the 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 corresponding to the contact portion 612 of the slot 61, so that the end of the second cantilever structure 64 forms a fork-like structure. In this way, the end of the second cantilever structure 64 has a strong deformation ability in the third direction, reducing the assembly resistance, thereby reducing the assembly difficulty, and also ensuring that the depth of the slot 61 is not too large, ensuring that the signal terminal 54 is completely covered by the shielding piece 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.

[0056] During the assembly of the shielding cylinder 71 and the shielding piece 6, the shielding cylinder 71 is mainly guided by the two guiding portions 611 located inside it. Therefore, the guiding portion 611 on the outer side of the shielding cylinder 71, that is, the guiding portion 611 on the second cantilever structure 64 described above, can be shorter and only needs to play a secondary auxiliary guiding role. After shortening the guiding portion 611 on the second cantilever structure 64, it is beneficial to reduce the width of the second cantilever structure 64, and then make the overall layout of the connector more compact.

[0057] On the shielding piece 6, a slotted opening 62 is also provided between the two slots 61 that cooperate with the same shielding cylinder 71. The slotted opening 62 can also make the part between the slotted opening 62 and the adjacent slot 61 form a cantilever. This cantilever is the first cantilever structure 63, and the first cantilever structure 63 helps the assembly of the shielding cylinder 71. One, two, or three slotted openings 62 can be provided, and the shape of the slotted opening 62 can also be determined as needed, so as to obtain the first cantilever structure 63 that meets the usage requirements between the slotted opening 62 and the slot 61. At the position on the insulator 53 corresponding to the signal spring claw 541, a reinforcing protrusion 532 protruding along the thickness direction of the terminal module 5 is provided. The positions of a part of all the slotted openings 62 correspond to the positions of the reinforcing protrusion 532. This part of the slotted opening 62 is used to form the first cantilever structure 63 and also serves as an avoidance slotted opening to avoid the reinforcing protrusion 532.

[0058] In order to enable the shielding cylinder 71 to be smoothly inserted into the slot 61 on the shielding sheet 6, an avoidance 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 avoidance groove 55 abuts against the end face of the shielding cylinder 71 in the first direction, so that the shielding cylinder 71 can be pressed by the terminal module after the terminal module is assembled. A guiding inclined surface is provided at the mouth of the avoidance groove 55 to facilitate the guiding of the shielding cylinder 71 during the assembly process. Moreover, in the insertion direction, the insulator 53 protrudes from the shielding sheet 6. During the assembly process of the shielding cylinder 71, it is first guided by the inclined surface at the mouth of the avoidance groove 55, and then guided by the guiding portion 611 on the shielding sheet 6.

[0059] In the present invention, the grounding contact 7 is first assembled on the shielding case 4, and the grounding contact 7 is fixed by the close fit between the limiting portion on the shielding case 4 and the outer wall surface of the shielding cylinder 71. Then, the grounding contact 7 is electrically connected to the shielding sheet 6 through the conductive connection structure. Compared with the prior art in which the grounding contact 7 is assembled and fixed on the terminal module, the assembly difficulty of the grounding contact 7 in the present invention is lower, and the structure of the grounding contact 7 is simpler, which is easy to process and manufacture.

[0060] See Attachment Figure 16 and Attachment Figure 17 Referring to the attached drawings, on the grounding contact 7, the grounding spring claws include a first grounding spring claw 73 and a second grounding spring claw 74. Among them, 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 projection area of the signal spring claw 541 in the differential pair in the second direction is small, so its external radiation in the second direction is also small. Only one first grounding spring claw 73 located in this direction can meet the requirements. The projection area of the signal spring claw 541 in the differential pair in the third direction is large, so its external radiation in the third direction is also large. At least two second grounding spring claws 74 located in this direction are required to meet the requirements.

[0061] In this embodiment, two second grounding spring claws 74 are provided on the corresponding side of the grounding contact 7, and the two second grounding spring claws 74 are respectively aligned with the two signal spring claws 541 in the corresponding differential pair in the third direction. This can meet the shielding requirements and also provide enough spacing between the two second grounding spring claws 74 to widen their roots, thereby ensuring better strength of a single second grounding spring claw 74. Of course, in other embodiments, three second grounding spring claws 74 can be provided on the corresponding side of the grounding contact 7, which will not be elaborated here.

[0062] The grounding contact member 7 in this embodiment has two forms, namely, a grounding contact member A and a grounding contact member B, wherein the grounding contact member A is provided with a first grounding spring claw 73 on both sides in the second direction and a second grounding spring claw 74 on only one side in the third direction, while the grounding contact member B is provided with a first grounding spring claw 73 on both sides in the second direction and a second grounding spring claw 74 on both sides in the third direction.

[0063] Taking one of the terminal modules as an example, the grounding contact B is only set at the differential pair at one end in the third direction, and the grounding contact A is set at the remaining differential pairs. The side of the grounding contact A where the second grounding claw 74 is not set is shielded by the second grounding claw 74 on the adjacent grounding contact 7. In this way, each differential pair can be surrounded by the grounding claws on all sides, ensuring a good shielding effect, which is also conducive to the close arrangement of the grounding contacts 7, thereby improving the overall structural compactness of the connector.

[0064] Of course, in other embodiments, all grounding contacts 7 may be grounding contacts B. In this embodiment, it is necessary to increase the number of limiting columns 34 on the insulating shell 3 to limit the grounding contacts 7. In other embodiments, the grounding contacts 7 may be used in conjunction with grounding contacts C and grounding contacts B. The grounding contacts C are provided with the first grounding claw 73 on only one side in the second direction and the second grounding claw 74 on only one side in the third direction. The combination of the grounding contacts C and the grounding contacts B is similar to the combination of the grounding contacts A and the grounding contacts B, and will not be described in detail here.

[0065] In this embodiment, the wall of the shielding tube 71 in the grounding contact A that is not provided with the grounding claw can also be used to stop and limit the corresponding limit partition 45 in the first direction. However, since the shielding tube 71 in the grounding contact B does not have a wall without the grounding claw, for the grounding contact B, the corresponding limit partition 45 needs to stagger the grounding claw on the grounding contact B to cooperate with the end surface of its shielding tube 71 in the first direction.

[0066] On the grounding contact 7, taking the grounding contact A as an example, the height of the first grounding claw 73 in the first direction is smaller than that of the second grounding claw 74, because the first grounding claw 73 needs to avoid the ribs on the insulating shell 3, and the shielding requirement of the signal claw 541 in the second direction is smaller. However, the first grounding claw 73 also needs to have a sufficiently long elastic deformation length so that it can deform normally when mating with the contact on the adapter connector. Therefore, in this embodiment, notches 75 are provided on both sides of the first grounding claw 73 on the shielding tube 71, extending the effective length of the first grounding claw 73 so that the first grounding claw 73 can be more easily elastically deformed.

[0067] For the grounding contact A, the barrel wall of the shielding barrel 71 without grounding spring claws is lower than the remaining barrel walls at the end facing the base body 31 of the insulating shell 3, so that the limiting partition 45 on the shielding shell 4 has a larger dimension in the first direction to provide a larger shielding range.

[0068] Specific Embodiment 2 of the high-speed backplane connector provided by the present invention: This embodiment is based on Embodiment 1, and the difference from Embodiment 1 is that the first limiting body and the second limiting body in this embodiment are separately arranged, and the first limiting body is a cross beam connected between two adjacent main partitions, and the second limiting body is a protrusion provided on the main partition and the second limiting body is located between two first limiting bodies adjacent in the third direction.

[0069] Specific Embodiment 3 of the high-speed backplane connector provided by the present invention: This embodiment is based on Embodiment 1, and the difference from Embodiment 1 is that in this embodiment, the first limiting portion is a protrusion structure provided on both sides of the limiting partition, and the second limiting portion is a protrusion structure provided on both sides of the main partition, and the shielding barrel is completely inserted into the space surrounded by the main partition and the limiting partition or the space surrounded by the main partition, the limiting partition and the frame. In this embodiment, the limiting partition no longer plays a role in limiting the shielding barrel in the first direction, and four limiting columns are provided at each installation position in this embodiment to limit the four corners of the shielding barrel in the first direction.

[0070] Specific Embodiment 4 of the high-speed backplane connector provided by the present invention: This embodiment is based on Embodiment 1, and the difference from Embodiment 1 is that in this embodiment, no limiting column is provided, and only the limiting partition is used to limit the shielding barrel in the first direction.

[0071] Specific Embodiment 5 of the high-speed backplane connector provided by the present invention: This embodiment is based on Embodiment 1, and the difference from Embodiment 1 is that in this embodiment, no limiting column is provided, nor is the limiting partition used to limit the shielding barrel. Instead, convex platforms are provided on both sides of the main partition in the first direction, and the convex platforms correspond to the four corners of the shielding barrel. When the shielding barrel is inserted, the convex platforms can provide limitation to the shielding barrel in the first direction.

[0072] Specific Embodiment 6 of the high-speed backplane connector provided by the present invention: This embodiment is based on Embodiment 1, and the difference from Embodiment 1 is that the installation position in this embodiment is an insertion hole provided on the main body frame, and the inner side walls of each insertion hole constitute a limiting portion.

[0073] Specific Embodiment 7 of the high-speed backplane connector provided by the present invention: This embodiment is based on Embodiment 1. The difference from Embodiment 1 is that the conductive connection structure in this embodiment is a card slot provided at one end of the shielding cylinder away from the base of the insulating shell, and the shielding piece can be inserted into the card slot and conductively connected to the shielding cylinder.

[0074] Specific Embodiment 8 of the high-speed backplane connector provided by the present invention: This embodiment is based on Embodiment 1. The difference from Embodiment 1 is that the two side walls of the slot in this embodiment are straight walls, and the shielding cylinder is in surface-to-surface contact with the side wall of the slot.

[0075] Specific Embodiment 9 of the high-speed backplane connector provided by the present invention: This embodiment is based on Embodiment 1. The difference from Embodiment 1 is that, referring to the attached Figure 21 and the attached Figure 22 , at both ends of the shielding cylinder 71 in the mating direction in this embodiment, they are respectively limited by a limiting structure provided on the insulating shell 3 and a limiting and mating structure provided on the shielding shell 4.

[0076] The limiting structure on the insulating shell 3 is a limiting post 34. The structure of the limiting post and the mating manner with the shielding cylinder are the same as those in Embodiment 1, and will not be elaborated here.

[0077] Referring to the attached Figure 23 and the attached Figure 24 , the shielding shell 4 in this embodiment includes a main body frame. A plurality of mounting holes penetrating the main body frame along the first direction are provided on the main body frame, and one mounting hole constitutes a mounting position. Referring to the attached Figure 20 , the shielding cylinder 71 is inserted into the corresponding mounting hole, and the outer side surface of the cylinder wall of the shielding cylinder is in close fit with the hole side wall surface of the mounting hole. In this embodiment, the hole side wall surface of the mounting hole constitutes a limiting portion that conducts the shielding shell 4 and the shielding cylinder 71 and fixes the shielding cylinder 71. Referring to the attached Figure 19 , a mating protrusion 76 protruding outward for close cooperation with the hole side wall of the mounting hole is provided on the side surface of the shielding cylinder. The mating protrusion 76 is a barbed structure, which can play a better anti-retreat role.

[0078] At least one limiting and mating structure is provided at each mounting hole. In one implementation manner of this embodiment, two limiting and mating structures are provided at each mounting hole, and the two limiting and mating structures are respectively located on opposite sides of the mounting hole. Referring to the attached Figure 24 , the limiting and mating structure includes a stop portion 48 and an inward-turning portion 49. The stop portion 48 is connected to one end of the shielding shell 4 away from the insulating shell and extends inside the mounting hole, so as to stop and limit one end of the shielding cylinder 71 away from the insulating shell 3 in the mating direction. The inward-turning portion 49 is located at the end of the stop portion 48. The inward-turning portion 49 is located inside the corresponding mounting hole and jointly forms a groove-like structure with the hole side wall of the mounting hole for clamping the shielding cylinder 71.

[0079] During the assembly process, first insert each shielding cylinder into the corresponding mounting hole along the first direction from front to back, then install the shielding shell into the insulating shell along the first direction from back to front. Finally, after inserting and fixing each terminal module to the insulating shell, the terminal module 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 stopping portion on the shielding shell and the limiting post on the insulating shell limit the shielding cylinder in the front-back direction to keep the shielding cylinder stable.

[0080] See the appendix Figure 19 , a receiving groove 77 is provided at the position of the shielding cylinder 71 corresponding to the stopping portion 48, and the stopping portion 48 is in stopping cooperation with the bottom of the receiving groove 77. During the assembly process, the stopping portion 48 can be embedded into the receiving groove 77. On the one hand, the cooperation between the stopping portion 48 and the receiving groove 77 can be used to improve the stability of the shielding cylinder 71. On the other hand, the rear end of the shielding cylinder 71 can be made to be as far back as possible, which is convenient for contacting and conducting with the shielding piece on the terminal module.

[0081] In other embodiments, the mating protrusion can also be provided on the inner side of the shielding cylinder to form a tight fit with the inwardly turned portion.

[0082] In other embodiments, the mating protrusion can be a hemispherical bulge, and the mating protrusion can also be provided on the inwardly turned portion or the empty side wall of the mounting hole, which can also play a role in enabling good conduction between the shielding cylinder and the shielding shell.

[0083] In other embodiments, neither the shielding cylinder nor the shielding shell may be provided with a mating protrusion, and the shielding cylinder is in surface-to-surface contact with the side wall of the mounting hole.

[0084] In other embodiments, the limiting and mating structure only includes the stopping portion and does not provide the inwardly turned portion.

[0085] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still make modifications to the technical solutions recorded in the foregoing embodiments without creative efforts, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-speed backplane connector, comprising a terminal module (5), an insulating housing (3) and a shielding housing (4). The terminal module (5) includes an insulator (53), a shielding sheet (6) and signal terminals (54) fixed on the insulator (53). The signal terminals (54) are arranged in pairs to form differential pairs. 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) provided in one-to-one correspondence with differential pairs and grounding spring claws provided on at least two mutually perpendicular cylindrical walls of the shielding cylinders (71). The shielding cylinders (71) are in contact conduction with the shielding sheets (6). The shielding case (4) includes a main frame, and mounting positions for inserting the shielding cylinders (71) are provided on the main frame. At each mounting position, a limiting portion is provided for closely fitting with the corresponding side surface of the shielding cylinder (71) so that the shielding cylinder (71) is in conduction and fixed with the shielding case (4).

2. The high-speed backplane connector according to claim 1, characterized in that, A limiting structure for blocking and fitting one end of the shielding cylinder (71) in the mating direction of the high-speed backplane connector is provided on the insulating case (3) and / or the shielding case (4). The other end of the shielding cylinder (71) in the mating direction of the high-speed backplane connector is in blocking and fitting with the terminal module (5).

3. The high-speed backplane connector according to claim 2, wherein The main frame includes a frame border (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 inside the frame border (43) to form each mounting position. The main partition (44) is located between adjacent terminal modules (5), and the limiting partition (45) is located between the signal spring claws (541) of two adjacent differential pairs of the same terminal module (5). The limiting partition (45) is in blocking and fitting with the corresponding shielding cylinder (71) at the corresponding mounting position in the mating direction of the high-speed backplane connector, and the limiting partition (45) constitutes the limiting structure on the shielding case (4).

4. The high-speed backplane connector according to claim 3, wherein First limit bodies (46) and second limit bodies (47) are provided on the main partition (44) and on the inner side of a part of the frame border (43) parallel to the main partition (44). Define the mating direction of the high-speed backplane connector as the first direction, the thickness direction of the terminal module (5) as the second direction, and the direction perpendicular to both the first direction and the second direction as the third direction. The first limit bodies (46) are between two adjacent shielding cylinders (71) in the third direction, and first limit portions (461) for limiting the corresponding shielding cylinders (71) in the third direction are provided at both ends of the first limit bodies (46) in the third direction. The second limit bodies (47) are on one side of the shielding cylinder (71) in the second direction, and second limit portions (471) for limiting the corresponding shielding cylinders (71) in the second direction are provided at the ends of the second limit bodies (47) in the second direction. The first limit bodies (46) are staggeredly arranged with the corresponding limiting partitions (45) in the third direction so that the end surface of the limiting partition (45) facing the shielding cylinder (71) in the first direction is exposed, so as to be able to be in blocking and fitting with the corresponding shielding cylinder (71) in the first direction.

5. The high-speed backplane connector according to claim 4, wherein, The first limit bodies (46) and the second limit bodies (47) are provided in groups, and the first limit bodies (46) and the second limit bodies (47) in the same group are integrally connected. The internal angle structure formed by the first limit bodies (46) and the second limit bodies (47) cooperates with the external angle structure formed by two mutually perpendicular cylindrical walls on the shielding cylinder (71).

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

7. The high-speed backplane connector according to claim 6, characterized in that, The limiting mating structure includes a blocking portion (48) and an inwardly turned portion (49) located at the end of the blocking portion (48). The blocking portion (48) is located at one end of the shielding cylinder (71) away from the insulating housing (3) in the mating direction and blocks and limits the shielding cylinder (71) at this end. The inwardly turned portion is located inside the shielding cylinder, and the inwardly turned portion and the inner side wall of the corresponding mounting position form a groove-like structure for clamping the shielding cylinder (71).

8. The high-speed backplane connector according to claim 7, characterized in that, The side surface of the shielding cylinder is provided with a mating protrusion (76) that protrudes outward and tightly mates with the inner side wall surface of the mounting position, and the inner side wall surface of the mounting position constitutes a limiting portion.

9. The high-speed backplane connector according to claim 7, wherein A receiving groove (77) for receiving the blocking portion (48) is provided at the position of the shielding cylinder (71) corresponding to the blocking portion (48), and the blocking portion (48) is in blocking mating with the bottom of the receiving groove (77).

10. The high-speed backplane connector according to any one of claims 2-9, characterized in that, The insulating housing (3) is provided with limiting posts (34), and at least one limiting post (34) is correspondingly provided for each mounting position. The end surface of the limiting post (34) is in blocking mating with the end surface of the shielding cylinder (71) at the corresponding mounting position in the mating direction of the high-speed backplane connector, and the limiting post (34) constitutes the limiting structure on the insulating housing (3).

11. The high-speed backplane connector according to any one of claims 1-5, characterized in that, The limiting portion includes a limiting main body (4711) and a limiting protrusion (4712) that protrudes from the limiting main body (4711) and is in pressing mating with the shielding cylinder (71).

12. The high-speed backplane connector according to any one of claims 1-9, characterized in that, One end of the signal terminal (54) extends out of the insulator (53) to form a signal spring claw (541). The shielding sheet (6) is provided with a slot (61). The shielding cylinder (71) includes two relatively arranged first cylinder walls and two relatively arranged second cylinder walls. The first cylinder wall is perpendicular to the second cylinder wall, and the second cylinder wall is located between the signal spring claws (541) of two adjacent differential pairs on the same terminal module (5), and the second cylinder wall is inserted and mated with the corresponding slot (61).

13. The high-speed backplane connector according to claim 12, characterized in that, The two side walls of the slot (61) include a guiding portion (611) and a contact portion (612) arranged in sequence from the slot opening to the slot bottom. The width of the slot (61) at the slot opening is greater than the width of the slot (61) at the contact portion (612), and the guiding portion (611) is an inclined side or an arc-shaped side for guiding the shielding cylinder (71) to transition from the slot opening position to the contact portion (612).

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

15. The high-speed backplane connector according to claim 12, characterized in that, The shielding sheet (6) is provided with a slot (62) between the two slots (61) that cooperate with the same shielding cylinder (71), and the shielding sheet (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 according to claim 14, characterized in that, At a position of the insulator (53) corresponding to the signal spring claw (541), a reinforcing protrusion (532) protruding in the thickness direction of the terminal module (5) is provided, and at least one slotted opening (62) serves as an avoidance slotted opening for avoiding the reinforcing protrusion (532).

17. The high-speed backplane connector according to claim 12, wherein Two slots (61) cooperating with the same shielding cylinder (71) form a slot pair. The portion between adjacent slot pairs on the shielding piece (6) forms a second cantilever structure (64). A deformation adjustment slot (65) is provided at the end of the second cantilever structure (64) 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 according to any one of claims 1-9, characterized in that, 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 relatively arranged first cylinder walls and two relatively arranged second cylinder walls. 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 of the two first cylinder walls of the same shielding cylinder (71), and grounding spring claws are provided on at least one of the second cylinder walls of the same shielding cylinder (71).

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

20. The high-speed backplane connector according to claim 19, characterized in that, The number of the second grounding spring claws (74) provided on the same second cylinder wall is two. The two second grounding spring claws (74) are respectively 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 width of the root of the second grounding spring claw (74) is greater than the width of the end of the second grounding spring claw (74).

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