High-speed backboard connector

Abstract

The invention provides a high-speed backboard connector, and belongs to the field of electric connectors. The high-speed backboard connector comprises a shell and a terminal module inserted in the shell, the shell comprises an insulating outer shell and a conductive inner shell arranged in the insulating outer shell, a slot is formed in the conductive inner shell, one end, used for being matched with an adaptive connector, of the terminal module is a front end and is located in the slot, and the terminal module is inserted into the slot. The terminal module comprises an insulator, a shielding sheet arranged on at least one side of the insulator, and a grounding terminal and a signal terminal which are fixed on the insulator, and the front end of the shielding sheet is located in the slot and is provided with a jacking part which is in jacking contact with the side wall of the corresponding slot; one side wall of the slot is provided with a bump which is used for abutting against and contacting with a grounding pin of an adaptive connector. According to the terminal module, the bumps are arranged on the side walls of the slots of the conductive inner shell, and a fixed arm and an elastic arm do not need to be arranged on the shielding sheet, so that the structure of the shielding sheet is simplified, and the processing efficiency of the shielding sheet and the assembling efficiency of the terminal module are improved.

Description

Technical Field

[0001] The invention belongs to the field of electrical connectors, and in particular relates to a high-speed backplane connector. Background Art

[0002] A common ground structure needs to be provided in an electrical connector for transmitting high-speed signals to make the shielding plates and grounding terminals in each terminal module share a common ground, thereby improving the shielding effect and ensuring the quality of signal transmission.

[0003] The existing Chinese utility model patent with authorization announcement number CN213093491U and authorization announcement date April 30, 2021 discloses a connector, which includes a shell and multiple transmission plates inserted in the shell, the shell includes an insulating outer shell and a conductive inner shell located in the insulating outer shell, the transmission plate includes an insulating frame, a signal terminal, a grounding terminal and a shielding plate, wherein the shielding plate includes a plate body and a fixed arm arranged at one end of the plate body, an elastic arm is arranged on the fixed arm, and a bulge is arranged on the elastic arm. A plurality of frame openings are formed on the conductive inner shell, and adjacent frame openings of the conductive shell are provided with series grooves for inserting the fixed arms, and a through opening connecting the two is opened between the series grooves and the corresponding frame openings, the elastic arm can enter the frame opening from the through opening to contact the grounding pin of the plug-in connector through the bulge, and at the same time, the grounding pin is inserted into the frame opening and also contacts the inner wall of the frame opening, and the spring sheet on the grounding terminal contacts the side of the grounding pin away from the elastic arm. In order to ensure reliable conductive contact between the fixed arm of the shielding sheet and the conductive inner shell, an interference area for enhancing the interference fit of the serial groove is also provided on the fixed arm.

[0004] However, the size of the serial connection slot is small. When assembling the transmission sheet (i.e., the terminal module), it is necessary to align the fixed arms of each shielding sheet with the mouth of the serial connection slot, and then insert the terminal module into the housing to complete the assembly. The shielding sheet is thin and the thickness of the serial connection slot is also small, so the operation is difficult, which seriously affects the assembly efficiency of the connector. In addition, the shielding sheet needs to be processed with structures such as fixed arms, elastic arms, and interference areas, and the shielding sheet needs to be subjected to complex punching and bending processes, resulting in low processing efficiency of the shielding sheet. Summary of the invention

[0005] The purpose of the present invention is to provide a high-speed backplane connector to solve the technical problems in the prior art that the fixed arm of the shielding plate of the terminal module needs to be aligned with the serial groove for assembly resulting in low assembly efficiency and the technical problem of low processing efficiency caused by the complex structure of the shielding plate.

[0006] 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 comprises a shell and a terminal module inserted in the shell, the shell comprises an insulating outer shell and a conductive inner shell arranged in the insulating outer shell, a slot is arranged on the conductive inner shell, an end of the terminal module used for cooperating with an adapter connector is a front end and the end is located in the slot, the terminal module comprises an insulator, a shielding sheet arranged on at least one side of the insulator, and a grounding terminal and a signal terminal fixed on the insulator, the front end of the shielding sheet is located in the slot and has a pressing portion that is in top pressure contact with the corresponding side wall of the slot, and a bulge is arranged on one side wall of the slot for top pressure contact with the grounding pin of the adapter connector.

[0007] As a further improvement, at least one shielding sheet in the terminal module includes a sheet body and an elastic bending portion located at the front end of the sheet body, the elastic bending portion constitutes a pressing portion, and the shielding sheet is in elastic pressing contact with the corresponding slot side wall through the elastic bending portion.

[0008] As a further improvement, shielding plates are provided on both sides of the insulator in the terminal module, and the two shielding plates are respectively a first shielding plate and a second shielding plate. The first shielding plate is provided with the elastic bending portion, and the front end of the second shielding plate is rigidly in contact with the corresponding slot side wall.

[0009] As a further improvement, a first contact protrusion for rigidly contacting the second shielding sheet is provided on the side wall of the slot.

[0010] As a further improvement, at least two elastic bending portions are provided and the elastic bending portions are arranged at intervals.

[0011] As a further improvement, the elastic bending portion includes an arc segment and a straight segment, the central angle corresponding to the arc segment is 180°, one end of the arc segment is connected to the sheet body, and the other end is connected to the straight segment, and the straight segment is parallel to the sheet body.

[0012] As a further improvement, the inner wall of the slot is recessed inwardly at a position for cooperating with the elastic bending portion to form a cooperating groove.

[0013] As a further improvement, a second contact protrusion for pressing contact with the elastic bending portion is provided in the matching groove.

[0014] As a further improvement, the grounding spring formed by the insulator extending from the front end of the grounding terminal is provided with a bent fitting portion for pressing into contact with the grounding pin of the adapter connector, and the position of the bulge corresponds to the bent fitting portion to clamp the grounding pin of the adapter connector from both sides.

[0015] As a further improvement, the front ends of the ground terminal and the signal terminal extend out of the insulator and form a grounding spring and a signal spring respectively. The conductive inner shell also includes a separation rib arranged in the slot for separating the space where the grounding spring is located from the space where the adjacent signal spring is located.

[0016] The beneficial effect is that the high-speed backplane connector provided by the present invention belongs to the invention of element change type. The high-speed backplane connector ensures reliable conductive contact between the ground pin and the conductive inner shell by setting a bulge on the side wall of the slot to match the ground pin in the adapter connector, and realizes the rapid return of the signal without further setting the bulge on the shielding sheet. Therefore, there is no need to set a fixed arm and other structures on the shielding sheet, which effectively simplifies the structure of the shielding sheet and improves the processing efficiency of the shielding sheet; and because the fixed arm is no longer set, there is no need to align the fixed arm with the serial slot when assembling the terminal module, and it only needs to directly insert the front end of the terminal module into the slot, which effectively reduces the difficulty of assembling the terminal module and improves the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the high-speed backplane connector of the present invention; Figure 2 It is a structural schematic diagram of a housing in one embodiment of a high-speed backplane connector of the present invention; Figure 3 It is a schematic structural diagram of an insulating housing in one embodiment of a high-speed backplane connector of the present invention; Figure 4 It is a schematic structural diagram of a conductive inner shell in an embodiment of a high-speed backplane connector of the present invention; Figure 5 It is a schematic diagram of the partial structure of a conductive inner shell in one embodiment of the high-speed backplane connector of the present invention; Figure 6 A schematic structural diagram of a conductive inner shell in an embodiment of a high-speed backplane connector of the present invention from another perspective; Figure 7 It is a schematic structural diagram of a terminal module in an embodiment of the high-speed backplane connector of the present invention; Figure 8 It is a structural schematic diagram of a terminal module from another perspective in one embodiment of the high-speed backplane connector of the present invention; Fig. 9 A cross-sectional view of a housing in one embodiment of a high-speed backplane connector of the present invention; Fig.10 A schematic diagram of a plugged connection between a high-speed backplane connector and a matching connector in an embodiment of the high-speed backplane connector of the present invention.

[0018] Description of reference numerals: 1. Insulating shell; 11. Shell body; 12. Isolation structure; 2. Conductive inner shell; 21. Inner shell body; 22. Slot; 23. Matching groove; 24. First contact protrusion; 25. Second contact protrusion; 26. Separation rib; 27. End plate; 28. Bump; 29. ​​Opening; 3. Insulator; 4. Signal spring; 5. Ground spring; 6. Bending matching part; 7. First shielding sheet; 71. Sheet body; 72. Elastic bending part; 8. Second shielding sheet; 9. Adapter connector; 91. Signal pin; 92. Ground pin. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with embodiments.

[0020] In order to solve the problems in the prior art, the basic concept of the present invention is to set a bulge on the side wall of the slot of the conductive inner shell, without setting a fixed arm and an elastic arm on the shielding sheet, thereby simplifying the structure of the shielding sheet and improving the processing efficiency of the shielding sheet and the assembly efficiency of the terminal module.

[0021] Specific embodiments of the high-speed backplane connector provided by the present invention: The present invention defines the plug-in direction of the high-speed backplane connector as a first direction, the second direction and the third direction are perpendicular to each other and to the first direction, and the end of the high-speed backplane connector used to mate with the adapter connector is its front end.

[0022] See attached Figure 1 The high-speed backplane connector includes a housing and terminal modules inserted into the housing from back to front, and each terminal module is arranged along a third direction.

[0023] See attached Figure 2 The housing includes an insulating outer shell 1 and a conductive inner shell 2 disposed in the insulating outer shell 1. The conductive inner shell 2 can be a metal shell, a conductive plastic shell, or a plastic shell with a conductive layer plated on the surface. The conductive inner shell 2 can be manufactured separately from the insulating outer shell 1 and then assembled together. Alternatively, the conductive inner shell 2 can be manufactured first, and then the insulating outer shell 1 and the manufactured conductive inner shell 2 are injection molded together. See Appendix Figure 4 and attached Figure 5 The conductive inner shell 2 includes an inner shell body 21 , on which slots 22 extending along the second direction and arranged along the third direction are formed, and one terminal module corresponds to one slot 22 .

[0024] See attached Figure 7 and attached Figure 8The terminal module includes an insulator 3, two shielding plates respectively arranged on both sides of the insulator 3, a grounding terminal and a signal terminal fixedly arranged on the insulator 3, the two signal terminals forming a differential pair, the grounding terminal and the differential pair are arranged alternately, the front ends of the grounding terminal and the signal terminal both extend out of the insulator 3 and form a grounding spring 5 and a signal spring 4 respectively, and the grounding spring 5 and the signal spring 4 are both provided with a bent mating portion 6, the bent mating portion 6 on the grounding spring 5 is used for press-fitting with the grounding pin 92 on the adapter connector 9, the bent mating portion 6 on the signal spring 4 is used for press-fitting with the signal pin 91 on the adapter connector 9, the setting method of the grounding terminal and the signal terminal is the same as the prior art, which will not be elaborated here. The terminal module includes a first terminal module and a second terminal module, and the grounding terminals and signal terminals in the first terminal module and the second terminal module are staggered in the second direction.

[0025] The two shielding sheets in the same terminal module are the first shielding sheet 7 and the second shielding sheet 8. During assembly, the terminal module is inserted into the housing from back to front, and the front end of the terminal module is located in the corresponding slot 22 on the conductive inner shell 2. The front end of the first shielding sheet 7 is pressed into a corresponding slot 22 on the conductive inner shell 2, and the second shielding sheet 8 is pressed into a corresponding slot 22 on the conductive inner shell 2. The first shielding sheet 7 and the second shielding sheet 8 are both conductively connected to the conductive inner shell 2 to form a common ground structure. The front ends of the first shielding sheet 7 and the second shielding sheet 8 have pressing portions that are in contact with the corresponding slot side walls.

[0026] The first shielding sheet 7 includes a sheet body 71 and an elastic bending portion 72 located at the front end of the sheet body 71. The first shielding sheet 7 is in elastic contact with the corresponding side wall of the slot 22 through the elastic bending portion 72. Under the condition of ensuring reliable conductive connection between the first shielding sheet 7 and the side wall of the slot 22, the elastic bending portion 72 reduces the force between the first shielding sheet 7 and the corresponding side wall of the slot 22, which is convenient for assembly. The elastic bending portion 72 constitutes a top pressing portion on the first shielding sheet 7.

[0027] The elastic bending portion 72 includes an arc segment and a straight segment, the central angle corresponding to the arc segment is 180°, one end of the arc segment is connected to the sheet body, and the other end is connected to the straight segment, and the straight segment is parallel to the sheet body. The elastic bending portion can generate a good elastic force after deformation, and plays a guiding role when the terminal module is inserted into the slot 22, which is convenient for assembly.

[0028] On a first shielding sheet 7, a plurality of elastic bending portions 72 are provided, and each elastic bending portion 72 is arranged at intervals along the second direction, so that each elastic bending portion 72 can independently undergo elastic deformation, making deformation easier to occur. The specific number of elastic bending portions 72 can be two, three, four or five, which can be set according to actual needs. In other embodiments, only one elastic bending portion 72 can be provided, and the size of the elastic bending portion 72 in the second direction is equal to the size of the sheet body in the second direction.

[0029] The front end of the second shielding sheet 8 has no elastic bending portion 72, so the front end of the second shielding sheet 8 is in direct rigid contact with the side wall corresponding to the slot 22, and the front end of the second shielding sheet 8 constitutes a pressing portion on the second shielding sheet 8. This can further simplify the structure of the second shielding sheet 8 and improve the processing efficiency of the second shielding sheet 8. In addition, since the elastic bending portion 72 is already provided on the first shielding sheet 7, the second shielding sheet 8 and the side wall corresponding to the slot 22 can also ensure reliable conductive contact and a smaller force.

[0030] See attached Figure 4 and attached Figure 5 The side wall of the slot 22 that cooperates with the first shielding sheet 7 is recessed inward at a position for cooperating with the elastic bending portion 72 to form a mating groove 23. The elastic bending portion 72 can be embedded in the mating groove 23 to prevent a large gap from appearing between the sheet body 71 of the first shielding sheet 7 and the corresponding side wall of the slot 22, thereby affecting the overall size of the high-speed backplane connector in the third direction.

[0031] In order to further enhance the reliability of the conductive connection between the shielding sheet and the conductive inner shell 2 and ensure that the terminal module can be conveniently assembled with the shell, the present invention is provided with contact protrusions on the two opposite side walls of the slot 22, wherein the contact protrusion on the side wall where the slot 22 cooperates with the first shielding sheet 7 is the first contact protrusion 24, and the first contact protrusion 24 is located in the matching groove 23; the contact protrusion on the side wall where the slot 22 cooperates with the second shielding sheet 8 is the second contact protrusion 25. The contact protrusions can reduce the resistance during the assembly process, and the contact protrusions are all strip structures and extend along the first direction, so that in the process of assembling the terminal module with the shell, the contact protrusions can also play a guiding role, facilitating the assembly operation.

[0032] After the terminal module and the housing are assembled together, the grounding spring sheet 5 and the signal spring sheet 4 on the terminal module are both located in the slot 22. A partition rib 26 integrally formed with the inner wall of the slot 22 is provided in the slot 22. The partition rib 26 is used to separate the space where the grounding spring sheet 5 is located from the space where the adjacent signal spring sheet is located to form a better shielding effect.

[0033] The separation rib 26 is a part of the conductive inner shell 2 , and the separation rib 26 divides the slot 22 into a ground cavity and a signal cavity, wherein the ground spring sheet 5 is located in the ground cavity, and the signal spring sheet 4 is located in the signal cavity.

[0034] The front end of the signal cavity is an open structure, see the attached Figure 2 and attached Figure 3 The insulating housing 1 includes a housing body 11 and an isolation structure 12 located inside the housing body 11 and inserted into the signal cavity from front to back, so as to isolate the signal spring 4 from the inner wall of the signal cavity and prevent the signal pin 91 on the adapter connector 9 or the signal spring 4 from contacting the inner wall of the signal cavity. Fig. 9 When plugged into the adapter connector 9, the signal pin 91 is sandwiched between the signal shrapnel 4 and the side wall of the isolation structure 12, so that there is a certain pressing force between the signal shrapnel 4 and the signal pin 91, ensuring a reliable conductive connection.

[0035] See attached Figure 6 and attached Fig. 9 The front end of the grounding cavity is integrally provided with an end plate 27, which is also a part of the conductive inner shell 2. The end plate 27 is provided with an opening 29 for inserting the grounding pin 92. The inner wall of the grounding cavity is provided with a bulge 28, which is located on the side wall of the slot 22. The position of the bulge 28 corresponds to the position of the bent matching portion 6 on the grounding spring 5. When not plugged in with the adapter connector 9, the bulge 28 is tightly pressed against the bent matching portion 6 on the grounding spring 5. When plugged in with the adapter connector 9, see the attached Fig.10 The grounding pin 92 is inserted between the bulge 28 and the bent mating portion 6 of the grounding spring sheet 5. The bent mating portion 6 and the bulge 28 clamp the grounding pin 92 from both sides of the grounding pin 92 of the adapter connector 9, so that there is a pressing force between the grounding pin 92 and the bulge 28, and between the grounding pin 92 and the grounding spring sheet 5, ensuring a reliable conductive connection.

[0036] The present invention allows the grounding pin 92 to be in direct conductive contact with the conductive inner shell 2, and a bulge 28 is provided on the conductive inner shell 2 to ensure reliable conductive connection between the grounding pin 92 and the conductive inner shell 2. Therefore, the present invention does not need to provide a bulge 28 on the shielding sheet, and the shielding sheet does not need to be provided with a fixed arm and other structures, which reduces the structural complexity of the shielding sheet and improves the processing efficiency of the shielding sheet. During the assembly process, the terminal module is installed in the slot 22 as a whole, and the shielding sheet is conductively connected to the conductive inner shell 2 by the top press fit between the shielding sheet and the side wall of the slot 22. Compared with the prior art method of aligning the fixed arm with the serial slot for insertion, the operation difficulty is effectively reduced, and the assembly efficiency is improved.

[0037] In other embodiments, the separating ribs may not be provided on the conductive inner shell as required.

[0038] In other embodiments, the position of the bulge may not correspond to the position of the bent matching portion on the grounding spring sheet. For example, the position of the bulge may be staggered with the position of the bent matching portion on the grounding spring sheet in the first direction. Alternatively, two bulges may be provided, one on the front side and the other on the rear side of the bent matching portion on the grounding spring sheet.

[0039] In other embodiments, the first contact protrusion and the second contact protrusion may be dot-shaped protrusions. In other embodiments, the first contact protrusion and the second contact protrusion may not be provided, and the shielding sheet is in surface contact with the corresponding slot side wall.

[0040] In other embodiments, the inner wall of the slot may not be provided with a matching groove.

[0041] In other embodiments, the elastic bending portion may also be straight, and a sharp-angle structure is formed between the elastic bending portion and the main body of the second shielding sheet by bending. The elastic bending portion in this embodiment may also make the second shielding sheet elastically contact with the corresponding side wall of the slot, and the elastic bending portion of this shape also has a stop-retreat function.

[0042] In other embodiments, the structure of the second shielding sheet may be the same as that of the first shielding sheet, also including a sheet body and an elastic bending portion. In this embodiment, both the second shielding sheet and the first shielding sheet are in elastic contact with the corresponding side walls of the slot via the elastic bending portion.

[0043] In other embodiments, the first shielding sheet and the second shielding sheet may not be provided with an elastic bending structure. In this embodiment, the first shielding sheet and the second shielding sheet are in rigid contact with the corresponding slot side walls.

[0044] In other implementations, only one shielding sheet may be provided in one terminal module as required. In this implementation, an elastic bending structure may or may not be provided on the shielding sheet.

[0045] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-speed backplane connector, characterized in that: The invention comprises a housing and a terminal module inserted in the housing, wherein the housing comprises an insulating outer shell (1) and a conductive inner shell (2) arranged in the insulating outer shell (1), a slot (22) being arranged on the conductive inner shell (2), an end of the terminal module for mating with an adapter connector (9) being a front end and the end being located in the slot (22), the terminal module comprising an insulator (3), a shielding sheet arranged on at least one side of the insulator (3), and a grounding terminal and a signal terminal fixed on the insulator (3), the front end of the shielding sheet being located in the slot (22) and having a pressing portion for pressing against a corresponding side wall of the slot (22), and a bulge (28) for pressing against a grounding pin (92) of the adapter connector (9) being arranged on a side wall of the slot (22).

2. The high-speed backplane connector according to claim 1, characterized in that: At least one shielding sheet in the terminal module comprises a sheet body (71) and an elastic bending portion (72) located at the front end of the sheet body (71); the elastic bending portion (72) constitutes a pressing portion; and the shielding sheet is in elastic pressing contact with a corresponding slot (22) side wall via the elastic bending portion (72).

3. The high-speed backplane connector according to claim 2, characterized in that: Shielding sheets are provided on both sides of the insulator (3) in the terminal module, the two shielding sheets being respectively a first shielding sheet (7) and a second shielding sheet (8), the first shielding sheet (7) being provided with the elastic bending portion (72), and the front end of the second shielding sheet (8) being in rigid contact with the side wall of the corresponding slot (22).

4. The high-speed backplane connector according to claim 3, characterized in that: A first contact protrusion (24) for rigidly contacting the second shielding sheet (8) is provided on a side wall of the slot (22).

5. The high-speed backplane connector according to any one of claims 2 to 4, characterized in that: At least two elastic bending portions (72) are provided, and the elastic bending portions (72) are arranged at intervals.

6. The high-speed backplane connector according to any one of claims 2 to 4, characterized in that: The elastic bending portion (72) comprises an arc segment and a straight segment, the central angle corresponding to the arc segment is 180°, one end of the arc segment is connected to the sheet body (71), and the other end is connected to the straight segment, and the straight segment is parallel to the sheet body (71).

7. The high-speed backplane connector according to claim 6, characterized in that: The inner wall of the slot (22) is recessed inwardly at a position for cooperating with the elastic bending portion (72) to form a matching groove (23).

8. The high-speed backplane connector according to claim 7, characterized in that: A second contact protrusion (25) for pressing into contact with the elastic bending portion (72) is provided in the matching groove (23).

9. The high-speed backplane connector according to any one of claims 1 to 4, characterized in that: A grounding spring (5) formed by the front end of the grounding terminal extending out of the insulator (3) is provided with a bent fitting portion (6) for pressing against a grounding pin (92) of the adapter connector (9), and the position of the bulge (28) corresponds to the bent fitting portion (6) so as to clamp the grounding pin (92) of the adapter connector (9) from both sides.

10. The high-speed backplane connector according to any one of claims 1 to 4, characterized in that: The front ends of the grounding terminal and the signal terminal extend out of the insulator (3) and form a grounding spring (5) and a signal spring (4), respectively. The conductive inner shell (2) further comprises a separation rib (26) disposed in the slot (22) and used for separating a space where the grounding spring (5) is located from a space where an adjacent signal spring (4) is located.

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