Connector

Abstract

The invention provides a connector, and belongs to the technical field of electric connection devices. The connector comprises a shell, the shell is provided with a fixing end used for being fixed to the printed board, a plurality of differential signal pairs arranged in a matrix mode and C-shaped shielding pieces arranged on the peripheries of the differential signal pairs in a one-to-one correspondence mode are fixed to the shell, a grounding net is assembled at the fixing end of the shell, and the grounding net is provided with a connecting part fixedly connected with the shell. The grounding grid comprises a plurality of grids, the plurality of grids surround each differential signal pair in a one-to-one correspondence manner, and the side wall of each grid is connected with a contact elastic claw which is in contact conduction with the corresponding C-shaped shielding sheet. The grounding grid adopts an independent assembly mode, the problems of difficulty in positioning and easiness in deformation during injection molding are solved, and the quality and the reliability of a product are more easily ensured.

Description

Technical Field

[0001] The invention relates to a connector, belonging to the technical field of electrical connection devices. Background Art

[0002] High-speed connectors are mainly used for the transmission and interconnection of high-speed data. In order to increase the transmission rate and reduce the crosstalk of the signals transmitted between the lines, high-speed connectors are usually provided with a shielding structure to improve the signal shielding effect. For example, the Chinese utility model patent with the authorization announcement number CN216214571U discloses a grounding assembly of a connector plug, wherein the connector includes a plug and a socket, and a plurality of pairs of differential signal contacts are fixed in the plug shell. The periphery of each pair of differential signal contacts is shielded by a plug shielding sheet. The plug shielding sheet is arranged in a matrix and includes a plurality of C-shaped shielding sheets and a plurality of plate-shaped shielding sheets. The plate-shaped shielding sheet and its corresponding C-shaped shielding sheet are integrally connected by a connecting arm. In order to achieve common grounding of multiple C-shaped shielding sheets and improve the shielding effect, the plug also includes a plug grounding frame. In one embodiment, the plug grounding frame is a grid frame structure, and each grid corresponds to a pair of differential signal contacts. The plug grounding frame is injection molded inside the plug shell, and the C-shaped shielding sheet is inserted into the corresponding grid. The inner wall of the grid of the plug grounding frame is integrally connected with a contact part, and the contact part abuts against the outer wall of the C-shaped shielding sheet, thereby realizing common ground conduction of each C-shaped shielding sheet.

[0003] The plug grounding frame (i.e., grounding grid) is integrally injection-molded within the plug housing, eliminating the need for assembly. However, in actual applications, it has been found that due to the complex structure of the grounding grid, it is difficult to obtain a good positioning in the injection mold. Furthermore, due to the thin wall thickness and weak strength of the grounding grid, it is easy to deform when the high-pressure plastic fills the mold cavity, affecting the quality and reliability of the injection-molded product. Summary of the Invention

[0004] The object of the present invention is to provide a connector to solve the problem that the grounding grid in the existing connector is difficult to position well and is easily deformed during injection molding, resulting in poor product quality and reliability.

[0005] To achieve the above objectives, the connector of the present invention adopts the following technical solutions: A connector includes a housing having a fixed end for fixing to a printed circuit board. The housing is fixed with multiple pairs of differential signal pairs arranged in a matrix and C-shaped shielding sheets arranged one-to-one around the periphery of each differential signal pair. The fixed end of the housing is equipped with a grounding grid, which has a connecting portion fixedly connected to the housing. The grounding grid includes multiple grids, and the multiple grids are one-to-one around the outside of each differential signal pair. The side wall of each grid is connected to a contact claw that contacts and conducts with the corresponding C-shaped shielding sheet.

[0006] The beneficial effect of the above technical solution is that: the present invention is an invention that changes the relationship between elements, and changes the fixed position of the grounding grid relative to the shell. The grounding grid is changed from being integrally injection-molded in the shell to being assembled at the fixed end of the shell, which is equivalent to taking the grounding grid out of the shell and separately assembling it at the fixed end of the shell. The grounding grid has a connection portion fixedly connected to the shell to achieve assembly and fixation between the grounding grid and the shell. The side walls of each grid of the grounding grid are connected to contact claws that contact and conduct with the corresponding C-shaped shielding sheet, ensuring that each C-shaped shielding sheet is connected to the common ground through the grounding grid. The grounding grid in the present invention is assembled separately, and the problems of difficult positioning and easy deformation during injection molding are avoided, making it easier to ensure product quality and reliability.

[0007] Furthermore, it is defined that there are N rows of differential signal pairs, N is a positive integer and N≥2, then the corresponding C-shaped shielding plates and the grounding grid have N rows respectively, the openings of the N rows of C-shaped shielding plates are oriented in the same direction and from the first row to the Nth row, the connector also includes a "I"-shaped shielding plate arranged in a one-to-one correspondence with the openings of the Nth row of C-shaped shielding plates, and the side walls of each grid of the Nth row of the grounding grid are also connected to end spring claws that are in contact and conductive with the corresponding "I"-shaped shielding plate.

[0008] Furthermore, the contact spring claw and the end spring claw are both bent at 90 degrees and extend toward the interior of the connector and away from the end surface of the fixed end.

[0009] Furthermore, a recessed groove is provided on the end surface of the fixed end, and the main body of the grounding grid except the contact spring claw and the end spring claw is located in the recessed groove, and the grounding grid does not protrude from the end surface of the fixed end.

[0010] Furthermore, each grid in the Nth row of the grounding grid has two end spring claws connected to the side wall, and each end spring claw is in contact and conductive with the side surface of the "I"-shaped shielding piece facing away from the corresponding C-shaped shielding piece; the C-shaped shielding piece includes two parallel side plates and an intermediate plate connected between the two side plates, and each grid in the second to Nth rows of the grounding grid is connected to a contact spring claw on three side walls respectively, and the contact claws on the three side walls are in contact and conductive with the inner wall surfaces of the two side plates and the intermediate plate of the corresponding C-shaped shielding piece respectively; each grid in the first row of the grounding grid is connected to a contact spring claw on side walls arranged opposite to each other in the row direction, so as to respectively contact and conductive with the inner wall surfaces of the two side plates of the corresponding C-shaped shielding piece; each grid in the first row of the grounding grid is connected to two contact spring claws on side walls in the column direction and close to the grounding grid frame for contacting and conductive with the outer wall surface of the intermediate plate of the corresponding C-shaped shielding piece; the outer shell is provided with slots for inserting each contact spring claw and end spring claw.

[0011] Furthermore, one of the end spring claw and the I-shaped shielding piece is provided with a convex bump that abuts against the other.

[0012] Furthermore, one of the contact claw and the C-shaped shielding piece is provided with a convex bump that abuts against the other.

[0013] Furthermore, the C-shaped shielding sheet includes two parallel side panels, both of which are connected with outward-pointing grounding fisheyes by bending, and the grounding fisheyes on the two side panels are arranged in parallel. The grounding grid includes a frame, multiple longitudinal ribs connected inside the frame, and multiple transverse ribs connected between two adjacent longitudinal ribs and between the outermost longitudinal ribs and the frame. The transverse ribs are located between two adjacent rows of differential signal pairs, and the longitudinal ribs are located between two adjacent differential signal pairs in each row. The longitudinal ribs are provided with perforations for the grounding fisheyes on the adjacent side panels of two adjacent C-shaped shielding sheets in each row to pass through.

[0014] Furthermore, the perforations on the longitudinal reinforcement include end perforations located at both ends and at least one middle perforation located between the end perforations at both ends. The end perforations are only for one grounding fisheye to pass through, and the middle perforations are for two grounding fisheyes to pass through at the same time.

[0015] Furthermore, the frame is provided with avoidance holes or avoidance grooves for the grounding fisheyes on the outer side panels of the endmost C-shaped shielding sheets of each row to pass through.

[0016] Furthermore, a heat rivet stud is provided at the fixed end of the shell, and the connecting portion is a connecting hole for the heat rivet stud to pass through.

[0017] Furthermore, the grounding grid includes a rectangular frame, and a plurality of spaced connection plates are respectively connected to two frame edges in the width direction of the frame, and each connection plate is provided with the connection hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A perspective view of an embodiment of a connector of the present invention; Figure 2 An exploded view of an embodiment of a connector of the present invention; Figure 3 A bottom view of an embodiment of a connector of the present invention; Figure 4 for Figure 3 A partial enlarged view of the Figure 5 for Figure 3 A partial enlarged view after removing the grounding grid; Figure 6 for Figure 3 A partial enlarged view after removing the grounding grid, C-shaped shielding sheet, and "I"-shaped shielding sheet; Figure 7 This is a structural diagram of the grounding grid in the connector embodiment of the present invention; Figure 8 A partial three-dimensional diagram of a grounding grid in an embodiment of a connector of the present invention; Figure 9 A three-dimensional diagram of a C-shaped shielding sheet in an embodiment of a connector of the present invention; Figure 10 It is a three-dimensional diagram of the “I”-shaped shielding sheet in the connector embodiment of the present invention.

[0019] In the figure: 1. Shell; 11. Fixed end; 111. Sink; 112. Hot rivet column; 113. First limiting slot; 114. Second limiting slot; 115. End slot; 12. Mounting unit; 121. Mounting slot; 13. C-shaped hole; 14. Strip hole; 2. Signal terminal; 3. C-shaped shielding plate; 31. Side plate; 311. First grounding fisheye; 32. Middle plate; 321. Second grounding fisheye; 4. "I"-shaped shielding plate; 41. Straight plate; 411. End grounding fisheye; 42. Bending edge; 5. Grounding grid; 51. Frame; 52. Longitudinal rib; 53. Horizontal rib; 54. Contact claw; 55. End claw; 56. End through-hole; 57. Middle through-hole; 58. Avoidance groove; 59. Connecting plate; 591. Connecting hole. DETAILED DESCRIPTION

[0020] In response to the technical problems existing in the prior art, the basic concept of the present invention is to assemble the grounding grid separately, and no longer use the method of integral injection molding in the shell, so as to solve the problem that the grounding grid is difficult to position well and is easy to deform during injection molding, resulting in poor product quality and reliability.

[0021] The features and performance of the present invention are further described in detail below with reference to the embodiments.

[0022] Example 1 of the connector of the present invention: like Figure 1 and Figure 2 As shown, the connector includes a housing 1 having a fixed end 11 for fixing to a printed circuit board and a mating end for mating with an adapter connector. The housing 1 is fixed with a plurality of differential signal pairs arranged in a matrix and a C-shaped shielding sheet 3 arranged one by one around each differential signal pair. Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the housing 1 includes a plurality of mounting units 12 arranged in a matrix. Each mounting unit 12 is mounted with two signal terminals 2, which together form a differential signal pair. Each mounting unit 12 is provided with a C-shaped hole 13 around its periphery for mounting a C-shaped shielding sheet 3, so that the C-shaped shielding sheet 3 surrounds the corresponding differential signal pair.

[0023] like Figure 9As shown, the C-shaped shielding plate 3 includes two parallel side panels 31 and a middle panel 32 connected between the two side panels 31. Both side panels 31 are connected to outward-pointing grounding fisheyes, specifically first grounding fisheyes 311, by bending. The first grounding fisheyes 311 on the two side panels 31 are arranged in parallel, and the angle between the first grounding fisheyes 311 and the corresponding side panels 31 is obtuse. Two second grounding fisheyes 321 are connected to the middle panel 32, resulting in a total of four grounding fisheyes on a C-shaped shielding plate 3. Each grounding fisheye is used to press-fit to a printed circuit board and conduct electricity to the ground structure on the printed circuit board.

[0024] The side plates 31 and the middle plate 32 of the C-shaped shielding piece 3 are both provided with convex bumps. When the C-shaped shielding piece 3 is installed in the C-shaped hole 13, the convex bumps are in interference contact with the hole wall of the C-shaped hole 13, thereby fixing the C-shaped shielding piece 3. Figure 5 and Figure 6 As shown, for each C-shaped hole 13, two first limiting grooves 113 are provided on one side of the fixed end 11 of the housing 1, communicating therewith. The orientation of the two first limiting grooves 113 corresponds to the two first grounding fisheyes 311 on the C-shaped shielding plate 3, allowing the first grounding fisheyes 311 to be inserted, serving as a position limit for the installation of the C-shaped shielding plate 3. After the C-shaped shielding plate 3 is in place, each grounding fisheye on it extends beyond the end surface of the fixed end 11 to be crimped and fixed to the printed circuit board.

[0025] It is defined that the differential signal pair is provided with N rows and M columns, N and M are positive integers and N ≥ 2, M ≥ 2 (in this embodiment, N = 4, M = 6), then the corresponding C-shaped shielding sheet 3 has N rows and M columns, such as Figure 1 、 Figure 2 and Figure 5 As shown, the openings of the N rows of C-shaped shielding sheets 3 are oriented in the same direction and from the first row toward the Nth row. The connector also includes an "I"-shaped shielding sheet 4 arranged one-to-one corresponding to the openings of the N-th row of C-shaped shielding sheets 3. The "I"-shaped shielding sheet 4 and the C-shaped shielding sheet 3 are separately arranged to facilitate processing and manufacturing.

[0026] like Figure 10 As shown, the "I"-shaped shielding sheet 4 includes a straight plate 41, one end of which is connected to two end grounding fisheyes 411. The end grounding fisheyes 411 correspond to the second grounding fisheyes 321 on the C-shaped shielding sheet 3 and are also used for crimping and fixing with the printed circuit board and conducting with the grounding structure on the printed circuit board. Figure 5 and Figure 6As shown, in addition to the C-shaped holes 13, the periphery of the Nth row of mounting units 12 also includes strip-shaped holes 14 for mounting the "I"-shaped shielding sheet 4. A convex bump is provided on the straight plate 41, which makes interference contact with the wall of the strip-shaped hole 14, thereby securing the "I"-shaped shielding sheet 4. Furthermore, a 90° bend connects two bent edges 42 on either side of the straight plate 41. For each strip-shaped hole 14, two second retaining grooves 114 are provided on the fixed end 11 of the housing 1, connecting thereto. The bent edges 42 engage with the corresponding second retaining grooves 114, acting as a limit for the installation of the "I"-shaped shielding sheet 4.

[0027] In the present invention, Figures 2 to 4 As shown, the fixed end 11 of the housing 1 is equipped with a grounding grid 5, combined with Figure 7 and Figure 8 The grounding grid 5 includes a rectangular frame 51, multiple longitudinal ribs 52 connected within the frame 51, and multiple transverse ribs 53 connected between adjacent longitudinal ribs 52 and between the outermost longitudinal ribs 52 and the frame 51. The transverse ribs 53 extend along the length of the frame 51 and are located between adjacent rows of differential signal pairs. The longitudinal ribs 52 extend along the width of the frame 51 and are located between adjacent differential signal pairs in each row. The longitudinal ribs 52 and transverse ribs 53 divide the grounding grid 5 into N rows and M columns of grids. Multiple grids correspond to each pair of differential signal pairs. The side walls of each grid are connected to contact claws 54 that contact and conduct with the corresponding C-shaped shielding sheet 3. At the same time, the side walls of each grid in the Nth row of the grounding grid 5 are also connected to end claws 55 that contact and conduct with the corresponding "I"-shaped shielding sheet 4. This allows each C-shaped shielding sheet 3 and the "I"-shaped shielding sheet 4 to achieve common ground connection through the grounding grid 5, ensuring the signal shielding effect of the connector and improving the transmission rate of the connector.

[0028] Specifically, the contact claws 54 and the end claws 55 are each bent at 90 degrees and extend toward the interior of the connector and away from the end face of the fixed end 11. All claws extend in the same direction, making processing easier and more convenient while also providing enhanced signal shielding. Furthermore, a recessed groove 111 is provided on the end face of the fixed end 11. The main portion of the grounding grid 5, excluding the contact claws 54 and the end claws 55, is located within the recessed groove 111. The grounding grid 5 does not protrude from the end face of the fixed end 11, facilitating direct contact between the end face of the fixed end 11 and the printed circuit board.

[0029] like Figures 4 to 8As shown, each grid in the Nth row of the grounding grid 5 has two end spring claws 55 connected to its side wall. Each end spring claw 55 contacts and conducts with the side surface of the "I"-shaped shielding sheet 4 facing away from the corresponding C-shaped shielding sheet 3, ensuring the shielding effect of the side paths. Each grid in the second through Nth rows of the grounding grid 5 has a contact spring claw 54 connected to each of its three side walls. These contact spring claws 54 contact and conduct with the inner surfaces of the two side panels 31 and the middle panel 32 of the corresponding C-shaped shielding sheet 3. Each grid in the first row of the grounding grid 5 has a contact spring claw 54 connected to its side walls, which are arranged opposite each other in the row direction, for contact and conduct with the inner surfaces of the two side panels 31 of the corresponding C-shaped shielding sheet 3. Each grid in the first row of the grounding grid 5 has two contact spring claws 54 connected to and conduct with the outer surface of the middle panel 32 of the corresponding C-shaped shielding sheet 3, ensuring the shielding effect of the side paths.

[0030] Contact and electrical continuity with the inner wall surfaces of the two side plates 31 of the C-shaped shielding piece 3 means that the contact claws 54 extend beyond the side plates 31 and into the C-shaped cavity enclosed by the C-shaped shielding piece 3. Similarly, contact and electrical continuity with the inner wall surface of the middle plate 32 of the C-shaped shielding piece 3 means that the contact claws 54 extend beyond the middle plate 32 and into the C-shaped cavity enclosed by the C-shaped shielding piece 3. Contact and electrical continuity with the outer wall surface of the middle plate 32 of the C-shaped shielding piece 3 means that the contact claws 54 are completely located outside the C-shaped shielding piece 3 and do not extend into the C-shaped cavity.

[0031] The longitudinal ribs 52 and the two frame edges of the frame 51 in the length direction are in contact and conductive with the inner wall surfaces of the two side plates 31 of the C-shaped shielding sheet 3 , so that they have a certain width respectively, thereby ensuring the overall structural strength of the grounding grid 5 .

[0032] Furthermore, the housing 1 is provided with slots for inserting the contact claws 54 and end claws 55. The slots for inserting the contact claws 54 that contact the inner wall of the C-shaped shielding sheet 3 (the claws on the three side walls of each grid in the second through Nth rows of the grounding grid 5, as well as the claws on the opposite side walls of each grid in the first row) are mounting slots 121, which are provided on the mounting unit 12. The slots for inserting the contact claws 54 that contact the outer wall of the C-shaped shielding sheet 3 (the claws that contact the outer wall of the middle plate 32 of the first row of C-shaped shielding sheets 3) and the slots for inserting the end claws 55 are end slots 115, respectively. End slots 115 are provided on the housing 1 outside the mounting unit 12. That is, the slots for inserting the single-sided single spring claws are all set on the mounting unit 12, and the slots for inserting the single-sided double spring claws are all set on the outer shell 1 outside the mounting unit 12. This can reduce the number of slots set on the mounting unit 12 and ensure the structural strength of the mounting unit 12 and the connection strength between the mounting unit 12 and the outer shell 1.

[0033] In this embodiment, one of the end spring claw 55 and the "I"-shaped shielding piece 4 is provided with a bulge that abuts against the other. For example, the "I"-shaped shielding piece 4 is provided with a bulge, and the part where the end spring claw 55 contacts the bulge is a plane, or the end spring claw 55 is provided with a bulge, and the part on the "I"-shaped shielding piece 4 that contacts the bulge is a plane, both of which can enhance the connection reliability between the end spring claw 55 and the "I"-shaped shielding piece 4.

[0034] Similarly, one of the contact claws 54 and the C-shaped shielding sheet 3 may be provided with a convex bump that abuts the other. For example, the C-shaped shielding sheet 3 may be provided with a convex bump and the portion where the contact claw 54 contacts the convex bump is a flat surface, or the contact claw 54 may be provided with a convex bump and the portion where the C-shaped shielding sheet 3 contacts the convex bump is a flat surface. Both of these can enhance the connection reliability between the contact claws 54 and the C-shaped shielding sheet 3. Furthermore, since there are a large number of contact claws 54, some may be provided with a convex bump and the corresponding portion of the C-shaped shielding sheet 3 may be a flat surface, while others may be provided with a flat surface and the corresponding portion of the C-shaped shielding sheet 3 may be provided with a convex bump, or a combination of these can be used.

[0035] In addition, if Figure 4 、 Figure 7 and Figure 8 As shown, the longitudinal ribs 52 are provided with through holes for the first grounding fisheyes 311 on the adjacent side plates 31 of two adjacent C-shaped shielding sheets 3 in each row to pass through. The through holes on the longitudinal ribs 52 include end through holes 56 at both ends and at least one middle through hole 57 between the end through holes 56 at both ends. The end through holes 56 are only for one first grounding fisheye 311 to pass through, and the middle through hole 57 is for two first grounding fisheyes 311 to pass through at the same time, which is convenient for processing and manufacturing.

[0036] The frame 51 is provided with an avoidance groove 58 for the first grounding fisheyes 311 on the outer side plates 31 of the endmost C-shaped shielding sheets 3 of each row to pass through, which facilitates the installation of the grounding grid 5 and has a relatively compact structure.

[0037] In addition, the grounding grid 5 has a connection portion fixedly connected to the outer shell 1. Specifically, a plurality of spaced connection plates 59 are connected to the two widthwise edges of the frame 51. Heat-riveted studs 112 are provided at corresponding positions of the recesses 111. The connection portions are connection holes 591 provided on each connection plate 59 for the corresponding heat-riveted studs 112 to pass through. Since the outer shell 1 is made of insulating material, the grounding grid 5 is fixed to the outer shell 1 through the heat-riveting process, which is simple and reliable.

[0038] The grounding grid 5 of the present invention is assembled separately, eliminating the issues of difficult positioning and deformation during injection molding, making it easier to ensure product quality and reliability. Furthermore, the present invention not only secures the grounding grid 5 to the housing 1, but also ensures that each C-shaped shielding piece 3 and the "I"-shaped shielding piece 4 are connected to the common ground, thus ensuring the shielding effectiveness of the connector.

[0039] In other embodiments of the connector: when the connecting portion is a connecting hole for the heating rivet to pass through, the connecting hole can be directly provided on the frame of the grounding grid, and in this case, there is no need to provide a connecting plate.

[0040] In other embodiments of the connector: the grounding grid and the shell can also be connected by screws. In this case, the connecting part of the grounding grid is a screw through-hole for the screw to pass through. To facilitate the connection, a metal insert is embedded in the shell, and the metal insert is provided with a threaded hole that cooperates with the screw.

[0041] In other embodiments of the connector: the grounding grid and the fixed end of the shell can also be fixed by snapping. In this case, the connecting part is a claw, which extends obliquely and has a protrusion at the end. The shell is provided with a slot for the claw to be inserted, and the end of the slot is provided with a limiting groove for the protrusion to be embedded in, so as to fix the grounding grid on the shell.

[0042] In other embodiments of the connector, the avoidance groove on the frame for the grounding fisheye to pass through can also be replaced by an avoidance hole.

[0043] In other embodiments of the connector: avoidance holes or avoidance grooves may no longer be provided on the frame. In this case, the grounding fisheyes on the side panels of the C-shaped shielding sheet need to extend further outward to avoid interference with the frame.

[0044] In other embodiments of the connector, all the through holes on the longitudinal reinforcement may be through holes for only one grounding fisheye to pass through.

[0045] In other embodiments of the connector: no perforations may be provided on the longitudinal ribs, and the positions on the longitudinal ribs corresponding to the grounding fisheyes may be arc-shaped or S-shaped to bypass the grounding fisheyes.

[0046] In other embodiments of the connector, either the contact claw or the C-shaped shielding piece may not be provided with a convex bump, and the two may be in surface contact.

[0047] In other embodiments of the connector, either the end spring claw or the I-shaped shielding piece may not be provided with a convex bump, and the two may be in surface contact.

[0048] In other embodiments of the connector: only one end spring claw that contacts an "I"-shaped shielding piece can be set. In this case, the end spring claw can be in contact and connected with the side of the "I"-shaped shielding piece facing the corresponding C-shaped shielding piece, and a slot for the end spring claw to be inserted is set on the mounting unit.

[0049] In other embodiments of the connector: there can be only one contact claw in the first row of the grounding grid that is in contact and conductive with the middle plate of the corresponding C-shaped shielding plate. At this time, the contact claw can be in contact and conductive with the inner wall surface of the middle plate, and a slot for inserting the contact claw is set on the mounting unit.

[0050] In other embodiments of the connector: no matter which side of the "I"-shaped shielding piece the end claw is in contact and conduction with, and no matter how many end claws there are, and no matter whether the contact claws of the first row of the grounding grid are in contact and conduction with the inner wall surface of the middle plate of the C-shaped shielding piece, or with the outer wall surface, and no matter how many contact claws there are, slots for inserting the contact claws and end claws may no longer be provided on the shell. For example, a part of the C-shaped hole is provided with a through hole connected to the C-shaped hole, and the contact claw is inserted into the through hole. Similarly, a part of the strip hole is provided with a through hole connected to the strip hole, and the end claw is inserted into the through hole. Or the contact part of the end claw with the "I"-shaped shielding piece is outside, and the end claw does not need to be inserted into the shell. Similarly, the contact part of the contact claw with the C-shaped shielding piece is outside, and the contact claw does not need to be inserted into the shell. In these cases, no slots or through holes are required.

[0051] In other embodiments of the connector: the end surface of the fixed end is no longer provided with a recessed groove. In this case, the grounding grid protrudes from the end surface of the fixed end, and the grounding grid contacts the printed circuit board.

[0052] In other embodiments of the connector: the contact claw and the end claw can also be located on one side of the end face of the fixed end, extending in a direction away from the end face of the fixed end. Of course, the contact claw and the end claw can also extend in opposite directions.

[0053] In other embodiments of the connector, depending on the specific needs of the product, there may be more than five rows of differential signal pairs, or there may be only three rows, but there should be at least two rows.

[0054] In other embodiments of the connector, the "I"-shaped shielding piece can be integrally connected to the Nth row of C-shaped shielding pieces.

[0055] In other embodiments of the connector, depending on the specific needs of the product, the "I"-shaped shielding piece may not be provided, and only the C-shaped shielding piece may be used to achieve the shielding effect.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A connector, characterized in that: The invention comprises a housing (1), the housing (1) having a fixed end (11) for fixing to a printed circuit board, a plurality of differential signal pairs arranged in a matrix and C-shaped shielding sheets (3) arranged one-to-one on the periphery of each differential signal pair fixed to the housing (1), a grounding grid (5) being assembled on the fixed end (11) of the housing (1), the grounding grid (5) having a connection portion fixedly connected to the housing (1), the grounding grid (5) comprising a plurality of grids and the plurality of grids correspondingly surrounding the outside of each differential signal pair, and a contact claw (54) contacting and conducting with the corresponding C-shaped shielding sheet (3) being connected to the side wall of each grid.

2. The connector according to claim 1, wherein: It is defined that the differential signal pair is provided with N rows, N is a positive integer and N ≥ 2, then the corresponding C-shaped shielding sheet (3) and the grounding grid (5) have N rows respectively, the openings of the N rows of C-shaped shielding sheets (3) are oriented in the same direction and from the first row to the Nth row, the connector further includes a "I"-shaped shielding sheet (4) arranged in a one-to-one correspondence with the openings of the Nth row of C-shaped shielding sheets (3), and the side wall of each grid of the Nth row of the grounding grid (5) is further connected with an end spring claw (55) that contacts and conducts with the corresponding "I"-shaped shielding sheet (4).

3. The connector according to claim 2, wherein: The contact spring claw (54) and the end spring claw (55) are both bent at 90 degrees and extend toward the interior of the connector and away from the end surface of the fixed end (11).

4. The connector according to claim 3, wherein: A recessed groove (111) is provided on the end surface of the fixed end (11), and the main body of the grounding grid (5) except for the contact spring claw (54) and the end spring claw (55) is located in the recessed groove (111), and the grounding grid (5) does not protrude from the end surface of the fixed end (11).

5. The connector according to any one of claims 2 to 4, characterized in that: The side walls of each grid in the Nth row of the grounding grid (5) are connected to two end spring claws (55), and each end spring claw (55) is in contact and conductive with the side surface of the "I"-shaped shielding sheet (4) facing away from the corresponding C-shaped shielding sheet (3); the C-shaped shielding sheet (3) includes two parallel side plates (31) and an intermediate plate (32) connected between the two side plates (31). The three side walls of each grid in the second row to the Nth row of the grounding grid (5) are respectively connected to a contact spring claw (54), and the contact spring claws (54) on the three side walls are respectively in contact with the two side plates (31) and the intermediate plate (32) of the corresponding C-shaped shielding sheet (3). The inner wall surface of the plate (32) is in contact and conductive; the side walls of each grid in the first row of the grounding grid (5) that are arranged opposite to each other in the row direction are respectively connected with a contact claw (54) to respectively contact and conduct with the inner wall surfaces of the two side plates (31) of the corresponding C-shaped shielding sheet (3); the side walls of each grid in the first row of the grounding grid (5) that are in the column direction and close to the grounding grid frame are respectively connected with two contact claws (54) for contacting and conducting with the outer wall surface of the middle plate (32) of the corresponding C-shaped shielding sheet (3); the housing (1) is provided with slots for inserting each contact claw (54) and the end claw (55).

6. The connector according to any one of claims 2 to 4, characterized in that: One of the end spring claw (55) and the "I"-shaped shielding piece (4) is provided with a convex bump that abuts against the other.

7. The connector according to any one of claims 1 to 4, characterized in that: One of the contact claw (54) and the C-shaped shielding piece (3) is provided with a convex bump that abuts against the other.

8. The connector according to any one of claims 1 to 4, characterized in that: The C-shaped shielding sheet (3) includes two parallel side plates (31), both of which are connected to outward-pointing grounding fisheyes by bending, and the grounding fisheyes on the two side plates (31) are arranged in parallel. The grounding grid (5) includes a frame (51), a plurality of longitudinal ribs (52) connected within the frame (51), and a plurality of transverse ribs (53) connected between two adjacent longitudinal ribs (52) and between the outermost longitudinal ribs (52) and the frame (51). The transverse ribs (53) are located between two adjacent rows of differential signal pairs, and the longitudinal ribs (52) are located between two adjacent differential signal pairs in each row. The longitudinal ribs (52) are provided with through-holes for the grounding fisheyes on the adjacent side plates (31) of two adjacent C-shaped shielding sheets (3) in each row to pass through.

9. The connector according to claim 8, wherein: The perforations on the longitudinal reinforcement (52) include end perforations (56) located at both ends and at least one middle perforation (57) located between the end perforations (56) at both ends. The end perforations (56) are only for one grounding fisheye to pass through, and the middle perforations (57) are for two grounding fisheyes to pass through at the same time.

10. The connector according to claim 8, wherein: The frame (51) is provided with an escape hole or an escape groove (58) for the grounding fisheye on the outer side plate (31) of each row of the endmost C-shaped shielding sheets (3) to pass through.

11. The connector according to any one of claims 1 to 4, characterized in that: The fixed end (11) of the housing (1) is provided with a heat rivet post (112), and the connecting portion is a connecting hole (591) through which the heat rivet post (112) passes.

12. The connector according to claim 11, wherein: The grounding grid (5) comprises a rectangular frame (51), and a plurality of spaced connection plates (59) are respectively connected to two frame edges in the width direction of the frame (51), and each connection plate (59) is provided with the connection hole (591).

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