Backboard connector

Abstract

The invention provides a backboard connector, and belongs to the field of connecting devices. The backboard connector comprises a shell and a terminal module installed on the shell, the shell comprises a grounding end plate and a connecting part, the grounding end plate is provided with a signal via hole and a grounding via hole for a signal contact piece and a grounding contact piece on an adaptive connector to penetrate through respectively, and the back side of the grounding end plate is provided with a clamping bulge; and the shielding sheet of the terminal module is provided with a clamping groove which is clamped and conducted with the clamping bulge. The backboard connector has no shielding blind area, the shielding effect is good, the structure is compact, and the overall size is small.

Description

Technical Field

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

[0002] Existing backplane connectors generally include an insulating shell and multiple terminal modules mounted on the insulating shell. The rear side of the insulating shell is provided with a cavity for inserting the terminal modules. Connecting plates extending rearward are provided on both sides of the insulating shell. The inner side of the connecting plates is provided with guide grooves for guiding the terminal modules and locking holes for embedding and connecting with the terminal modules. The terminal modules include an insulator, signal terminals arranged in the insulator, and a shielding sheet arranged on at least one lateral side of the insulator. The signal terminals are arranged in differential pairs. As signal transmission rates increase, the shielding requirements of backplane connectors are also becoming increasingly stringent.

[0003] The existing Chinese invention patent application with application publication number CN118970553A discloses a connector. In addition to the above-mentioned structure, the connector also has a shielding shell (i.e., a second split body) installed between the insulating shell (i.e., the first split body) and the terminal module. The shielding shell is provided with a docking cavity for accommodating the signal terminal. The insulating shell is provided with an isolation plate that extends into the docking cavity and serves as an insulator between the cavity wall of the docking cavity and the signal terminal. In addition, the connector also has a shielding net provided between the shielding shell and the insulating shell. The shielding net is in contact with and conductive with the shielding shell. The shielding net is provided with a spring claw for contacting and conductive with the grounding portion of the adapter connector.

[0004] The shielding shell provides a fully enclosed shield for the mating ends of the signal terminals and is also grounded with the shielding plates of each terminal module, enhancing the shielding effect. Both the insulating shell and the shielding shell have a certain thickness. Nesting them together, the combined thickness of the insulating shell and shielding shell is greater than that of a single-layer shell, increasing the overall size of the connector. The front-to-back dimensions of the connector directly affect the space required for mating with the mating connector. In some devices, the limited mating space makes it impossible to add a shielding shell to the connector.

[0005] Moreover, although the shielding shell enhances the shielding effect, there is still a shielding blind area at the end wall of the plug-in end of the insulating shell, which causes the shielding effect of the backplane connector to be unable to meet the requirements of higher-speed signal transmission. Summary of the Invention

[0006] An object of the present invention is to provide a backplane connector to solve the technical problem of poor shielding effect of the backplane connector in the prior art.

[0007] To achieve the above objectives, the technical solution of the backplane connector provided by the present invention is: A backplane connector includes a shell and a terminal module installed on the shell, the shell includes a grounding end plate and a connecting portion integrally combined with the back side of the grounding end plate, the connecting portion is provided with a cavity for the terminal module to be installed, the grounding end plate is provided with signal vias and grounding vias for the signal contact and grounding contact on the adapter connector to pass through respectively, and the back side of the grounding end plate is provided with a snap-in protrusion; the terminal module includes an insulator, a signal terminal provided on the insulator and a shielding sheet provided on at least one side of the insulator, one end of the signal terminal extends out of the insulator and forms a contact portion that can elastically contact and conduct with the signal contact on the adapter connector, the end of the shielding sheet corresponding to the contact portion cantilevers out of the insulator and forms an overhanging portion that can provide shielding on one side of the contact portion, and the overhanging portion is provided with a card slot that is snap-in and conducts with the snap-in protrusion.

[0008] As a further improvement, shielding plates are provided on both sides of the terminal module, and two rows of snap-in protrusions are provided at the positions corresponding to each cavity on the grounding end plate. The two rows of snap-in protrusions are respectively snap-fitted with the slots on the two shielding plates on the same terminal module.

[0009] As a further improvement, a support plate for supporting the overhanging parts and providing shielding between different signal terminal pairs of the same terminal module is fixed and conductively provided between the overhanging parts of the two shielding sheets, a mating protrusion is provided on the back side of the grounding end plate, and a mating groove is provided on the support plate which is engaged with and conductively connected to the mating protrusion.

[0010] As a further improvement, an insulating isolation cylinder extending toward the back side of the grounding terminal plate and used to separate the signal terminal and the shielding sheet is integrally combined with the side wall of the signal via hole.

[0011] As a further improvement, a connecting groove for connecting adjacent signal vias is provided on the front side of the grounding terminal plate, an insulating connector is provided in the connecting groove, and the insulating connector is integrated with the insulating isolation cylinders in the corresponding two adjacent signal vias.

[0012] As a further improvement, the signal via includes a wide hole section and a narrow hole section, the wide hole section corresponds to the front side of the grounding end plate, and the narrow hole section corresponds to the back side of the grounding end plate, so that the wall of the insulating isolation tube corresponding to the front side position of the grounding end plate is thickened.

[0013] As a further improvement, the backplane connector also includes a common ground grid fixed on the front side of the grounding end plate and connected to the grounding end plate. The common ground grid is provided with a grounding spring claw that extends into the grounding via and can elastically contact and conduct with the grounding contact piece on the adapter connector.

[0014] As a further improvement, the grounding via is provided with an avoidance groove for avoiding the grounding claw at the hole opening on the front side of the grounding end plate. The avoidance groove is located on the side corresponding to the grounding via and the grounding claw. When the grounding contact of the adapter connector enters the grounding via, the grounding claw elastically contacts the grounding contact and retreats into the avoidance groove under the push of the grounding contact.

[0015] As a further improvement, the common ground grid is fixed to the grounding end plate by welding.

[0016] As a further improvement, a cold rivet column is provided on the front side of the grounding end plate, and a connection hole for the cold rivet column to pass through is provided on the common ground network. The common ground network is fixedly connected to the grounding end plate by the cold rivet column that is deformed by riveting after passing through the connection hole.

[0017] As a further improvement, the connecting portion includes insulating side plates on both sides and a plurality of insulating partitions connected between the two insulating side plates, and the area surrounded by the insulating side plates and the insulating partitions constitutes a cavity.

[0018] As a further improvement, the outer side surface of the insulating side plate is provided with a guide ridge for guiding and cooperating with the adapter connector when plugging with the adapter connector. One end of the guide ridge extends to the front side of the grounding end plate and is combined with the front side of the grounding end plate.

[0019] As a further improvement, the shielding sheet is provided with a grounding spring arm for elastically contacting and conducting with a grounding contact piece on the adapter connector, and the grounding spring arm is located between adjacent pairs of signal terminals.

[0020] The beneficial effect is that the backplane connector provided by the present invention is a pioneering invention. The front end plate of the shell of the backplane connector is a grounding terminal plate, and the grounding terminal plate and each shielding plate are connected to a common ground, shortening the signal return path. The grounding terminal plate can also play a shielding role. The grounding terminal plate and each shielding plate together constitute a shielding structure that can provide more comprehensive shielding for the signal terminals and the signal contacts on the adapter connector. Compared with the existing technology without shielding blind spots, the shielding effect is effectively improved. Moreover, because the grounding terminal plate is part of the shell, the overall size of the shell is small, and the overall size of the backplane connector is also small, which is conducive to the compact and miniaturized design of the backplane connector and is convenient for use in environments with limited space. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the overall structure of embodiment 1 of the backplane connector of the present invention; Figure 2 Schematic diagram of the structure of the housing in embodiment 1 of the backplane connector of the present invention; Figure 3 This is a schematic structural diagram of the housing in Embodiment 1 of the backplane connector of the present invention from another perspective; Figure 4 Schematic diagram of the front side structure of the grounding terminal plate in embodiment 1 of the backplane connector of the present invention; Figure 5 Schematic diagram of the back side structure of the grounding terminal plate in embodiment 1 of the backplane connector of the present invention; Figure 6 This is a schematic structural diagram of a terminal module in Embodiment 1 of the backplane connector of the present invention; Figure 7 This is a schematic structural diagram of the terminal module in Embodiment 1 of the backplane connector of the present invention from another perspective; Figure 8 This is a schematic structural diagram of the backplane connector embodiment 1 of the present invention, wherein the terminal module is removed from the shielding sheet; Figure 9 Schematic diagram of the structure of a shielding sheet in embodiment 1 of the backplane connector of the present invention; Figure 10 Schematic diagram of the structure of another shielding sheet in embodiment 1 of the backplane connector of the present invention; Figure 11 Schematic diagram of the structure of the support plate in embodiment 1 of the backplane connector of the present invention; Figure 12 Schematic diagram of the structure of the plug end of embodiment 1 of the backplane connector of the present invention; Figure 13 This is a schematic structural diagram of a common ground network in Embodiment 1 of the backplane connector of the present invention; Figure 14 It is a cross-sectional view of a first embodiment of the backplane connector according to the present invention.

[0022] Description of reference numerals: 1. Housing; 11. Grounding terminal plate; 111. Signal via; 1111. Narrow hole section; 1112. Wide hole section; 112. Grounding via; 113. Connecting groove; 114. Snap-fit ​​protrusion; 115. Matching protrusion; 116. Avoidance groove; 12. Connecting portion; 121. Insulating side plate; 122. Insulating partition; 123. Guide groove; 124. Snap-fit ​​hole; 125. Guide ridge; 13. Insulating spacer; 14. Insulating connector; 2. Terminal module ; 21. Signal terminal; 211. Contact part; 212. Signal fisheye; 22. Shielding plate; 221. Base part; 222. Overhanging part; 223. Grounding fisheye; 224. Positioning hole; 225. Grounding spring arm; 226. Slot; 23. Insulator; 24. Support plate; 241. Positioning protrusion; 242. Matching groove; 3. Fixing plate; 4. Positioning buckle plate; 5. Common ground grid; 51. Grounding claw; 6. Grounding contact; 7. Signal contact. DETAILED DESCRIPTION

[0023] The present invention is described in further detail below with reference to the examples.

[0024] Specific embodiment 1 of the backplane connector provided by the present invention: A backplane connector, see attached Figure 1 , comprising a housing 1 and terminal modules 2 mounted on the housing 1, as well as fixing plates 3 and positioning clips 4 for connecting the terminal modules 2 together. In this embodiment, the direction in which the backplane connector and the adapter connector are plugged together is the front-to-back direction, and the end where the backplane connector and the adapter connector are plugged together is the front end. In addition, the direction in which the terminal modules 2 are arranged is the transverse direction, and the direction perpendicular to the transverse and front-to-back directions is the longitudinal direction.

[0025] See attached Figure 2 and attached Figure 3 The housing 1 includes a grounding terminal plate 11 and a connecting portion 12 integrally combined with the back side of the grounding terminal plate 11. The connecting portion 12 is provided with a cavity for loading the terminal module 2. The grounding terminal plate 11 is provided with a signal via 111 and a ground via 112 for the signal contact 7 and the ground contact 6 on the adapter connector to pass through respectively.

[0026] See attached Figure 4 and attached Figure 5 The grounding terminal plate 11 is a metal part processed by the MIM process. The front side of the grounding terminal plate 11 is its front side, the rear side of the grounding terminal plate 11 is its back side, and the connecting part 12 is a plastic body integrally connected to the grounding terminal plate 11 by secondary injection molding.

[0027] The connecting portion 12 includes insulating side panels 121 located on either side in the longitudinal direction and a plurality of insulating partitions 122 integrally connected between the two insulating side panels 121. The insulating partitions 122 are arranged in a transversely spaced arrangement, and the front ends of the insulating side panels 121 and the insulating partitions 122 are both bonded to the back side of the grounding terminal plate 11. The area enclosed by the insulating side panels 121 and the insulating partitions 122 forms a cavity for receiving the terminal module 2. The inner sides of the insulating side panels 121 are provided with guide grooves 123 for guiding the terminal module 2 during installation. The insulating side panels 121 are also provided with latching holes 124 within the guide grooves 123 for engaging with latching protrusions on the terminal module 2 after the terminal module 2 is properly installed.

[0028] The insulating side panels 121 are used to connect to the terminal modules 2. Because the snap-fit ​​protrusions 114 on the terminal modules 2 need to snap into the snap-fit ​​holes 124 on the insulating side panels 121, the insulating side panels 121 need to elastically deform outward during assembly. Made of plastic, the insulating side panels 121 possess good elasticity, facilitating assembly of the terminal modules 2 and the housing 1. The insulating partitions 122 both separate the terminal modules 2 and increase the contact area between the connector 12 and the grounding terminal plate 11, thereby enhancing the bonding strength between the connector 12 and the grounding terminal plate 11.

[0029] The outer side surface of the insulating side plate 121 is integrally provided with a guide ridge 125 made of the same plastic material and extending in the front-to-back direction. The guide ridge 125 is used to guide and cooperate with the adapter connector during the plug-in process of the backplane connector and the adapter connector. The front end surface of the guide ridge 125 extends forward and passes over the front side of the grounding end plate 11. The part of the guide ridge 125 located on the longitudinal side of the grounding end plate 11 is integrated with the longitudinal side of the grounding end plate 11. The part of the guide ridge 125 located in front of the front side of the grounding end plate 11 extends inward in the longitudinal direction and is integrated with the front side of the grounding end plate 11. The guide ridge 125 can not only guide the plugging process of the backplane connector and the adapter connector, but also increase the bonding area between the connecting part 12 and the grounding end plate 11, and enhance the bonding strength. Moreover, the part where the guide ridge 125 is bonded to the positive side of the grounding end plate 11 can also play a role of blocking and cooperating with the grounding end plate 11, further enhancing the bonding strength between the connecting part 12 and the grounding end plate 11, and preventing the connecting part 12 from being detached from the grounding end plate 11.

[0030] See attached Figure 6 and attached Figure 7 The terminal module 2 includes an insulator 23 and signal terminals 21 integrally injection-molded on the insulator 23, and shielding sheets 22 fixed to both sides of the insulator 23 by secondary hot riveting. The signal terminals 21 are arranged in pairs to transmit differential signals.

[0031] See attached Figure 8 One end of the signal terminal 21 extends forward from the insulator 23 and forms a contact portion 211 with a spring structure for elastically contacting and conducting with the signal contact 7 on the adapter connector. The other end of the signal terminal 21 extends from one longitudinal side of the insulator 23 and forms a signal fisheye 212 for crimping onto a printed circuit board.

[0032] See attached Figure 9 and attached Figure 10The shielding sheet 22 includes a base portion 221, an overhang portion 222 at the front end of the base portion 221, and multiple grounding fisheyes 223 located along one longitudinal side of the base portion 221. The grounding fisheyes 223 are also used for crimping onto the printed circuit board. The base portion 221 covers one lateral side of the insulator 23, and the overhang portion 222 extends forward from the insulator 23. The overhang portions 222 of the two shielding sheets 22 are located on either side of the contact portion 211 and provide lateral shielding for the contact portion 211.

[0033] See attached Figure 7 A support plate 24 is provided between the two overhangs 222. The support plate 24 is fixedly connected to and conductive with the overhangs 222. On the one hand, the support plate 24 is used to provide support for the overhangs 222 to prevent the overhangs 222 from deforming during the assembly process. On the other hand, the support plate 24 can also be used to provide shielding between the pairs of signal terminals 21 in the longitudinal direction.

[0034] See attached Figure 11 The support plate 24 is provided with positioning protrusions 241 on both lateral sides, and the overhang portion 222 is provided with positioning holes 224 at the position where the support plate 24 is mounted, into which the positioning protrusions 241 are inserted to position the support plate 24. After the positioning protrusions 241 on the support plate 24 are inserted into the positioning holes 224, the positioning protrusions 241 are fixedly connected to the side walls of the positioning holes 224 by laser welding.

[0035] See attached Figure 7 Each pair of signal terminals 21 is equipped with two support plates 24, one on each longitudinal side of the pair. The space between these two support plates 24 forms a signal plug-in cavity. The signal contacts on the adapter connector mate with the contact portions 211 of the signal terminals 21 within the cavity. The surrounding walls of the cavity provide shielding for the signal terminals 21 and the signal contact members 7 therein. Two support plates 24 are positioned between two adjacent pairs of signal terminals 21. The space between these two support plates 24 forms a grounding plug-in cavity. The overhang 222 of one shielding plate 22 is provided with a grounding spring arm 225 that protrudes into the grounding plug-in cavity. The grounding contact member 6 on the adapter connector mates with the grounding spring arm 225 within the cavity.

[0036] See attached Figure 2 and attached Figure 3 , and combined with the attached Figure 14Each signal via 111 is integrally connected to a rearward-extending insulating spacer 13 on its sidewall. The front end of the insulating spacer 13 is flush with the front side of the grounding terminal 11. After assembly, the insulating spacer 13 extends into the signal plug cavity and is located between the signal terminal 21 and the shielding plate 22, isolating the signal terminal 21 from the shielding plate 22 and preventing the signal terminal 21 from being grounded during use. When not plugged into the adapter connector, the contact portion 211 of the signal terminal 21 abuts the inner surface of the insulating spacer 13. After the adapter connector is plugged in, the signal contact 7 of the adapter connector is inserted between the contact portion 211 of the signal terminal 21 and the insulating spacer 13.

[0037] See attached Figure 4 Combined with the attached Figure 14 The signal via 111 includes a wide hole section 1112 and a narrow hole section 1111. The wide hole section 1112 is located in front of the narrow hole section 1111. The wide hole section 1112 corresponds to the front side of the grounding end plate 11, and the narrow hole section 1111 corresponds to the back side of the grounding end plate 11, so that the wall of the front end of the insulating isolation tube 13 is thickened. On the one hand, this can prevent the insulating isolation tube 13 from slipping out backwards, and a step structure is formed between the wide hole section 1112 and the narrow hole section 1111. The step surface of the step structure faces forward, so that the step surface of the step structure forms a blocking fit with the front end thickened part of the insulating isolation tube 13, which can prevent the isolation tube from withdrawing backwards from the signal via 111; on the other hand, the structural strength of the front end of the insulating isolation tube 13 is enhanced, and the front end of the insulating isolation tube 13 is not easy to curl during the plugging and unplugging process, thereby extending the service life of the backplane connector. Moreover, after the wide hole section 1112 is provided, the front end of the insulating spacer cylinder 13 is wider, which can also facilitate the provision of a guiding slope structure for guiding the signal contact 7 on the adapter connector on the inner side of the front end of the insulating spacer cylinder 13 .

[0038] A transversely extending connecting groove 113 is provided on the front side of the grounding terminal plate 11. This connecting groove 113 connects adjacent signal vias 111, and the bottom surface of the connecting groove 113 is flush with the stepped surface of the step structure. During the injection molding process, the connecting groove 113 is also filled with plastic, which forms an insulating connector 14 that connects the insulating spacers 13 in adjacent signal vias 111. The provision of insulating connector 14 further improves the connection reliability between the insulating spacers 13 and the grounding terminal plate 11, preventing the insulating spacers 13 from falling off.

[0039] See attached Figure 5 The back side of the grounding terminal plate 11 is provided with rows of clipping protrusions 114 arranged in a transverse direction, and the clipping protrusions 114 in each row are arranged in a longitudinal direction. Each cavity corresponds to two rows of clipping protrusions 114, and the positions of the two rows of clipping protrusions 114 correspond to the two shielding sheets 22 in the same terminal module 2. Figure 9 and attached Figure 10 The front end of the overhang portion 222 of the shielding piece 22 is provided with a latching groove 226 which is engaged with and communicated with the latching protrusion 114 .

[0040] See attached Figure 5 The back side of the ground terminal plate 11 is further provided with a matching protrusion 115, which is located between two rows of clamping protrusions 114 corresponding to the same terminal module 2, and the position of each matching protrusion 115 corresponds to the position of the support plate 24, see the attached Figure 11 The front end of the support plate 24 is provided with a matching groove 242 that is engaged with and communicated with the matching protrusion 115.

[0041] After the grounding contact piece 6 in the adapter connector contacts the grounding spring arm 225, the grounding contact piece 6 is connected to the corresponding shielding piece 22. At the same time, the grounding end plate 11 is connected to each shielding piece 22 and each support plate 24, shortening the signal return path. The grounding end plate 11 itself can also provide shielding for signal transmission. The grounding end plate 11 and the shielding piece 22 and support plate 24 cooperate to form a more comprehensive shielding structure, which effectively improves the shielding effect and improves crosstalk.

[0042] See attached Figure 12 and attached Figure 13 The backplane connector also includes a common ground grid 5 fixed to the front side of the ground terminal plate 11 and electrically connected to the ground terminal plate 11. The common ground grid 5 is provided with grounding claws 51 corresponding one-to-one with the grounding vias 112. The grounding claws 51 extend into the corresponding grounding vias 112. The front openings of the grounding vias 112 are located at positions corresponding to the grounding claws 51 and are provided with escape grooves 116 for accommodating the grounding claws 51. During the mating process between the backplane connector and the adapter connector, the grounding contacts 6 on the adapter connector will pass through the grounding vias 112. At this time, the grounding contacts 6 will come into close contact with the grounding claws 51, and the grounding claws 51 can be pushed back into the escape grooves 116 by the grounding contacts 6.

[0043] The common ground network 5 can realize the common grounding of the grounding contacts 6 on the adapter connector, further shorten the signal return path, and improve the crosstalk situation.

[0044] Cold rivet studs are provided on the front side of the grounding terminal plate 11, and connection holes for the cold rivet studs to pass through are provided on the common ground grid 5. When installing the common ground grid 5, the common ground grid 5 is first placed on the front side of the grounding terminal plate 11 and the cold rivet studs are passed through the grounding holes. The ends of the cold rivet studs are then pressed into a mushroom-shaped structure by cold pressing, thereby securely connecting the common ground grid 5 to the grounding terminal plate 11. In other embodiments, the grounding terminal plate 11 may not be provided with cold rivet studs. After the common ground grid 5 is placed tightly against the front side of the grounding terminal plate 11, the common ground grid 5 and the grounding terminal plate 11 are secured together by laser welding.

[0045] Specific embodiment 2 of the backplane connector provided by the present invention: This embodiment is based on embodiment 1, and differs from embodiment 1 in that no grounding spring arms are provided on the shielding sheets in this embodiment. After the grounding contact piece on the adapter connector contacts and is connected to the grounding spring claw on the common ground network, signal reflux can be achieved.

[0046] Specific embodiment 3 of the backplane connector provided by the present invention: This embodiment is based on embodiment 1, and differs from embodiment 1 in that the guide ridges in this embodiment are only used for guiding during the plugging process of the adapter connector, and are not used to increase the bonding area between the connecting portion and the grounding terminal plate.

[0047] In order to enhance the bonding strength between the connection part and the grounding end plate, a concave-convex structure may be provided at the position corresponding to the connection part on the back side of the grounding end plate to increase the bonding area between the connection part and the grounding end plate and improve the bonding strength between the connection part and the grounding end plate.

[0048] Specific embodiment 4 of the backplane connector provided by the present invention: This embodiment is based on embodiment 1, and differs from embodiment 1 in that, in this embodiment, the connecting portion is made of the same material as the grounding end plate and is integrated into one piece, so that the connecting portion can not only connect to each terminal module, but can also be used to shield electromagnetic waves in the surrounding environment, thereby reducing the impact of the surrounding environment on signal transmission.

[0049] Compared with the plastic connection part, the metal connection part has poor elastic deformation ability. In order to facilitate the installation of the terminal module into the connection part, the size of the snap protrusion on the terminal module can be slightly reduced.

[0050] Specific embodiment 5 of the backplane connector provided by the present invention: This embodiment is based on embodiment 1, and differs from embodiment 1 in that no avoidance groove is provided on the grounding via in this embodiment. At the same time, compared with embodiment 1, the length of the grounding claw in this embodiment is shorter. During the process of plugging and mating with the adapter connector, the deformation amplitude of the grounding claw is small, so no avoidance groove is required.

[0051] Specific embodiment 6 of the backplane connector provided by the present invention: This embodiment is based on embodiment 1, and differs from embodiment 1 in that a common ground grid is not provided in this embodiment. Since the grounding terminal plate and each shielding sheet and support plate are all connected to the common ground, a good shielding effect can be achieved without providing a common ground grid.

[0052] Specific embodiment 7 of the backplane connector provided by the present invention: This embodiment is based on embodiment 1, and differs from embodiment 1 in that the signal via holes in this embodiment are holes of uniform size, so the wall thickness of the insulating spacer tube in the signal via holes is also relatively uniform.

[0053] In some embodiments of this embodiment, in order to enhance the bonding strength between the insulating isolation tube and the grounding end plate, a pit can be set on the side wall of the signal via. The pit can create a protrusion on the outside of the insulating isolation tube that extends into the groove, thereby increasing the bonding area between the insulating isolation tube and the grounding end plate.

[0054] Specific embodiment 8 of the backplane connector provided by the present invention: This embodiment is based on embodiment 1, and differs from embodiment 1 in that, in this embodiment, the connection groove is provided on the back side of the grounding end plate, and an insulating connector connecting adjacent insulating spacer cylinders can also be formed.

[0055] Specific embodiment 9 of the backplane connector provided by the present invention: This embodiment is based on embodiment 1, and differs from embodiment 1 in that, in this embodiment, no connection groove is provided on the grounding end plate, and each insulating isolation cylinder is independently provided.

[0056] Specific embodiment 10 of the backplane connector provided by the present invention: This embodiment is based on embodiment 1, and differs from embodiment 1 in that no insulating isolation tube is provided on the grounding end plate in this embodiment. Instead, the insulating isolation tube is separately formed and embedded in the signal plug-in cavity to achieve isolation between the signal terminal and the shielding plate.

[0057] Specific embodiment 11 of the backplane connector provided by the present invention: This embodiment is based on embodiment 1, and differs from embodiment 1 in that no insulating isolation tube is provided in this embodiment. This embodiment is suitable for backplane connectors with a larger space in the signal plug-in cavity. Since there is sufficient space for isolation, the signal terminal and the shielding sheet will not come into contact.

[0058] Specific embodiment 12 of the backplane connector provided by the present invention: This embodiment is based on embodiment 1, and differs from embodiment 1 in that no support plate is provided in this embodiment, and therefore no signal plug cavity and ground plug cavity are formed.

[0059] In some embodiments of this embodiment, a shielding wall can be set on the back side of the grounding end plate, and a shielding wall is set on both longitudinal sides of each signal via. After assembly, the shielding wall is inserted between the overhanging parts of the two shielding plates of the same terminal module, thereby replacing the support plate in embodiment 1 to play a shielding and supporting role.

[0060] Specific embodiment 13 of the backplane connector provided by the present invention: This embodiment is based on Embodiment 1 and differs from Embodiment 1 in that, of the two shielding sheets on the terminal module in this embodiment, only one has an overhanging portion, the front end of which is provided with a slot. A support plate is also not required in this embodiment.

[0061] Specific embodiment 14 of the backplane connector provided by the present invention: This embodiment is based on Embodiment 1 and differs from Embodiment 1 in that a shielding sheet is provided on only one side of the terminal module in this embodiment, and the shielding sheet is provided with an overhanging portion, the front end of which is provided with a slot. A support plate is not required in this embodiment.

[0062] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments without inventive effort, or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A backplane connector, characterized in that: The invention comprises a housing (1) and a terminal module (2) mounted on the housing (1), wherein the housing (1) comprises a grounding terminal plate (11) and a connecting portion (12) integrally combined with the back side of the grounding terminal plate (11), the connecting portion (12) is provided with a cavity for receiving the terminal module (2), the grounding terminal plate (11) is provided with a signal through hole (111) and a grounding through hole (112) for respectively passing the signal contact piece (7) and the grounding contact piece (6) on the adapter connector, and the back side of the grounding terminal plate (11) is provided with a snap-fit ​​protrusion (114); the terminal module (2) comprises an insulator (23), a A signal terminal (21) on an insulator (23) and a shielding sheet (22) provided on at least one side of the insulator (23), one end of the signal terminal (21) extending out of the insulator (23) and forming a contact portion (211) capable of elastically contacting and conducting with a signal contact piece (7) on an adapter connector, an end of the shielding sheet (22) corresponding to the contact portion (211) extending out of the insulator (23) and forming an overhanging portion (222) capable of providing shielding on one side of the contact portion (211), and a card slot (226) being provided on the overhanging portion (222) being engaged with and conducting with the card protrusion (114).

2. The backplane connector according to claim 1, wherein: Shielding sheets (22) are provided on both sides of the terminal module (2), and two rows of snap-fit ​​protrusions (114) are provided on the grounding end plate (11) at positions corresponding to each cavity, and the two rows of snap-fit ​​protrusions (114) are respectively snap-fitted with the slots (226) on the two shielding sheets (22) on the same terminal module (2).

3. The backplane connector according to claim 2, wherein: A support plate (24) for supporting the overhanging portion (222) and providing shielding between different signal terminals (21) pairs of the same terminal module (2) is fixed and conductively provided between the overhanging portions (222) of the two shielding sheets (22). A mating protrusion (115) is provided on the back side of the grounding terminal plate (11), and a mating groove (242) is provided on the support plate (24) for engaging and conducting with the mating protrusion (115).

4. The backplane connector according to any one of claims 1 to 3, wherein: An insulating isolation cylinder (13) extending toward the back side of the grounding terminal plate (11) and used for separating the signal terminal (21) and the shielding plate (22) is integrally bonded to the side wall of the signal via hole (111).

5. The backplane connector according to claim 4, wherein: A connecting groove (113) for connecting adjacent signal vias (111) is provided on the front side of the grounding end plate (11), an insulating connector (14) is provided in the connecting groove (113), and the insulating connector (14) is integrally combined with the insulating isolation cylinders (13) in the corresponding two adjacent signal vias (111).

6. The backplane connector according to claim 4, wherein: The signal via (111) includes a wide hole section (1112) and a narrow hole section (1111), wherein the wide hole section (1112) corresponds to the front side of the grounding end plate (11), and the narrow hole section (1111) corresponds to the back side of the grounding end plate (11), so that the wall of the insulating isolation tube (13) corresponding to the front side of the grounding end plate (11) is thickened.

7. The backplane connector according to any one of claims 1 to 3, wherein: The backplane connector further comprises a common ground grid (5) fixed to the front side of the grounding terminal plate (11) and conductively connected to the grounding terminal plate (11); the common ground grid (5) is provided with a grounding spring claw (51) which is cantilevered into the grounding via (112) and can elastically contact and conduct with the grounding contact piece (6) on the adapter connector.

8. The backplane connector according to claim 7, wherein: The grounding via (112) is provided with an avoidance groove (116) for avoiding the grounding claw (51) at the opening of the positive side of the grounding end plate (11). The avoidance groove (116) is located on the side of the grounding via (112) corresponding to the grounding claw (51). When the grounding contact piece (6) of the adapter connector enters the grounding via (112), the grounding claw (51) elastically contacts the grounding contact piece (6) and retreats into the avoidance groove (116) under the push of the grounding contact piece (6).

9. The backplane connector according to claim 7, wherein: The common ground grid (5) is fixed to the grounding end plate (11) by welding.

10. The backplane connector according to claim 7, wherein: A cold rivet post is provided on the front side of the grounding end plate (11), and a connection hole for the cold rivet post to pass through is provided on the common ground grid (5). The common ground grid (5) is fixedly connected to the grounding end plate (11) by the cold rivet post that passes through the connection hole and is deformed by riveting.

11. The backplane connector according to any one of claims 1 to 3, wherein: The connecting portion (12) comprises insulating side plates (121) on both sides and a plurality of insulating partitions (122) connected between the two insulating side plates (121); the area enclosed by the insulating side plates (121) and the insulating partitions (122) constitutes a cavity.

12. The backplane connector according to claim 11, wherein the insulation The outer side surface of the side plate (121) is provided with a guide ridge (125) for guiding and cooperating with the adapter connector when plugging with the adapter connector, and one end of the guide ridge (125) extends to the front side surface of the grounding end plate (11) and is combined with the front side surface of the grounding end plate (11).

13. The backplane connector according to any one of claims 1 to 3, wherein: The shielding sheet (22) is provided with a grounding elastic arm (225) for elastically contacting and conducting with a grounding contact piece (6) on the adapter connector. The grounding elastic arm (225) is located between adjacent pairs of signal terminals (21).

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