Daughter card structure, plug-in connectors and connectors

Abstract

This utility model relates to a daughter card structure, a plug-in connector, and a connector. The daughter card structure includes an insulating frame, a differential signal conductor, and a ground conductor. The signal conductor includes a signal contact, a signal crimping member, and a signal transmission section. The ground conductor includes a ground contact, a ground crimping member, and a ground transmission section. A torsion section is provided between the ground contact and the ground transmission section. The size of the torsion section is adapted to the thickness of the insulating frame. After being twisted by the torsion section, the ground transmission section connects to the first and second contact arms of the ground contact. Through the torsion of the torsion section, the first and second contact arms can respectively contact different sleeves of the mating connector, improving the electromagnetic shielding effect and signal transmission quality. The plug-in connector equipped with the above-mentioned daughter card structure has strong anti-interference ability and high signal quality. The signal of the connector composed of the above-mentioned plug-in connector has low crosstalk during transmission and has high stability and reliability.

Description

Technical Field

[0001] This utility model relates to the field of electrical connectors, and in particular to daughter card structures, plug-in connectors and connectors. Background Technology

[0002] High-speed backplane connectors serve as the "data arteries" of core systems such as servers, switches, and communication equipment. Through precise differential signal transmission, impedance matching, and electromagnetic shielding technologies, they have become fundamental components supporting key areas such as cloud computing, artificial intelligence, and 5G / 6G communication.

[0003] Shielding is the "invisible defense" of high-speed backplane connectors, and its performance directly determines whether the system can operate stably in high-frequency, high-density environments. Utility Model Content

[0004] Therefore, it is necessary to provide a daughter card structure with good shielding effect, a plug-in connector, and a connector.

[0005] A daughter card structure, comprising:

[0006] Insulating frame;

[0007] A differential signal conductor includes two pairs of signal conductors, each signal conductor including a signal contact, a signal crimping member, and a signal transmission section located between the signal contact and the signal crimping member, the signal transmission section being located within the insulating frame;

[0008] A grounding conductor is provided at an interval from the differential signal conductor. The grounding conductor includes a grounding contact, a grounding crimp, and a grounding transmission section located between the grounding contact and the grounding crimp, the grounding transmission section being located within the insulating frame.

[0009] A torsion section is provided between the grounding contact and the grounding transmission section. The size of the torsion section is adapted to the thickness of the insulating frame. After being twisted by the torsion section, the grounding transmission section is connected to the first contact arm and the second contact arm of the grounding contact.

[0010] This utility model also provides a plug-in connector including the above-mentioned sub-card structure, the plug-in connector including: a housing, a plurality of the above-mentioned sub-card structures, and a shielding sheet;

[0011] Multiple sub-card structures are stacked together, and shielding sheets are provided on opposite sides of each sub-card structure, with the shielding sheets in contact with the grounding conductor;

[0012] The sub-card structure and the shielding sheet are disposed in the housing.

[0013] This utility model also provides a connector including the above-mentioned plug-in connector, the connector comprising:

[0014] A plug connector and a mating connector that mates with the plug connector, the mating connector comprising a housing and a multi-row mating structure disposed on the housing, the mating structure corresponding to the plug structure and the receiving structure, each row of the mating structure comprising a plurality of sleeves arranged sequentially, the shape of the sleeves matching the shape of the receiving groove, the sleeves being located in the receiving groove.

[0015] The aforementioned daughter card structure, when applied to high-speed backplane connectors, allows the first and second contact arms to contact the grounding structure of the connector individually via a torsion section when mating with other connectors. This improves electromagnetic shielding and signal transmission quality. Simultaneously, the torsion of the grounding contact allows the first and second contact arms of one grounding contact to contact different grounding structures of other connectors, enhancing the overall grounding and shielding effect of the daughter card module and ensuring signal transmission quality. Connectors equipped with this daughter card structure exhibit strong anti-interference capabilities and high signal quality. Connectors composed of these connectors show low crosstalk during signal transmission, exhibiting high stability and reliability. Attached Figure Description

[0016] Figure 1 A perspective structural diagram of a connector according to one embodiment;

[0017] Figure 2 for Figure 1 A structural diagram of the connector from another perspective;

[0018] Figure 3 This is a schematic diagram of the structure of a plug-in connector according to one embodiment;

[0019] Figure 4 This is a schematic diagram of the sub-card structure of one embodiment;

[0020] Figure 5 This is a partial structural diagram of a sub-card structure according to one embodiment;

[0021] Figure 6 for Figure 5 A three-dimensional structural diagram of the sub-card structure shown;

[0022] Figure 7 for Figure 4 The diagram shows the structure of the grounding terminal in the sub-card structure.

[0023] Figure 8 for Figure 4 A schematic diagram of the grounding terminal from another perspective;

[0024] Figure 9 This is a schematic diagram of a sub-card structure with a shielding sheet installed according to one embodiment;

[0025] Figure 10 for Figure 9 A schematic diagram of the sub-card structure from another perspective;

[0026] Figure 11 for Figure 9 The cross-sectional view of sub-card structure B-B' shown;

[0027] Figure 12 for Figure 3 A schematic diagram of the housing of the plug-in connector shown;

[0028] Figure 13 for Figure 3 A schematic diagram of the housing of the plug-in connector from another perspective;

[0029] Figure 14 for Figure 3 A front view of the first surface of the housing of the plug connector shown;

[0030] Figure 15 for Figure 3 A front view of the second surface of the housing of the plug connector shown;

[0031] Figure 16 An exploded view of a mating connector (pins not shown) according to one embodiment;

[0032] Figure 17 A top view of a mating connector according to one embodiment;

[0033] Figure 18 for Figure 16 The front view of the mating connector shown;

[0034] Figure 19 for Figure 16 The diagram shows the three-dimensional structure of the mating connector.

[0035] Figure 20 for Figure 16 A three-dimensional structural diagram of the docking connector from another perspective;

[0036] Figure 21 for Figure 16 A three-dimensional structural diagram of the sleeve of the mating connector shown;

[0037] Figure 22 for Figure 16 A schematic diagram of the housing of the mating connector shown;

[0038] Figure 23 for Figure 16 A schematic diagram of the structure of the other side of the housing of the connector shown;

[0039] Figure 24 This is a partial structural schematic diagram of a connector according to one embodiment;

[0040] Figure 25 for Figure 1 The connector shown is in cross-sectional view along line A-A'.

[0041] Figure 26 for Figure 1 A schematic diagram of another type of connector sub-card structure is shown;

[0042] Figure 27 for Figure 16 The diagram shows a connector with one sleeve removed.

[0043] Figure 28 This is a three-dimensional structural diagram of the pins of the mating connector shown in Figure 16.

[0044] Figure label:

[0045] 1. Connector; 10. Housing; 12. Daughter Card Structure; 14. Shielding Plate; 16. Fixing Plate; 110. Base; 120. Side Wall; 112. Connecting Structure; 112a. First Connecting Cavity; 112b. Second Connecting Cavity; 113. Gap; 114. Receiving Structure; 116. Receiving Groove; 1160. Receiving Cavity; 1162. Isolator; 1164. Partition; 116a. Signal Hole; 1162a. Insertion Slot; 1200. Guide; 140. Groove;

[0046] 120. Insulator; 122. Differential signal conductor; 124. Grounding conductor; 126. Torsion section; 130. Bending section; 132. Insertion guide section; 1220. Signal contact; 1222. Signal crimping member; 1224. Signal transmission section; 1240. Grounding contact; 1242. Grounding crimping member; 1244. Grounding transmission section; 1240a. First contact arm; 1240b. Second contact arm; 1241. Connecting section;

[0047] 2. Connector; 20. Housing; 22. Ground plane; 210. Base; 220. Outer wall; 212. Connecting structure; 214. Sleeve mounting groove; 216. Pin retainer; 2120. Sleeve; 2140. Limiting element; 2160. Pin mounting hole; 2122. Pin; 2124. Pin; 200. First through hole; 202. Second through hole; Guide 222. Detailed Implementation

[0048] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0049] This invention relates to a high-speed backplane connector, which supports high-speed data transmission and signal interaction, and is widely used in high-speed communication and computing fields such as servers, switches, routers, and fiber optic transmission equipment. Generally, a high-speed backplane connector consists of two mating parts to complete the connection between the backplane and the daughterboard. The connector of this invention will be further described below with reference to the accompanying drawings.

[0050] like Figures 1-3 As shown, one embodiment of the connector includes a mating connector 1 and a connecting connector 2 that cooperate with each other. Specifically, the mating connector 1 and the connecting connector 2 achieve electrical connection through mating. In this embodiment, the mating connector 1 includes a housing 10, a plurality of stacked sub-card structures 12, and a shielding sheet 14. The plurality of sub-card structures 12 are disposed and held in the housing 10. The number of sub-card structures 12 can be selected according to actual needs. For example, in this embodiment, the mating connector 1 includes eight sub-card structures 12. In other embodiments, the mating connector 1 may also have other numbers of sub-card structures 12, which is not limited here.

[0051] The daughter card structure 12 (wafer) is a functional unit module for connecting the connector 1, such as... Figures 4-6 As shown, in this embodiment, the sub-card structure 12 includes an insulating frame 120, a differential signal conductor 122, and a ground conductor 124. The differential signal conductor 122 includes two paired signal conductors, each including a signal contact 1220, a signal crimping member 1222, and a signal transmission segment 1224 located between the signal contact 1220 and the signal crimping member 1222. The signal transmission segment 1224 is located within the insulating frame 120. The ground conductor 124 is spaced apart from the differential signal conductor 122 and includes a ground contact 1240, a ground crimping member 1242, and a ground transmission segment 1244 located between the ground contact 1240 and the ground crimping member 1242. The ground transmission segment 1244 is located within the insulating frame 120.

[0052] The insulating frame 120 can be a commonly used insulating frame in the art, used to hold or fix the differential signal conductor 122 and the ground conductor 124. The signal contact 1220 of the differential signal conductor 122 extends out of the insulating frame 120 to contact the pins of the mating connector 2, enabling signal transmission between the mating connector 2 and the plug connector 1. The signal crimp 1222 extends out of the insulating frame 120 for connection to the PCB board. The signal crimp 1222 can be a fisheye terminal; in other embodiments, the signal crimp 1222 can also be other types of terminals in the art, such as a straight pin, without limitation. Similarly, the ground conductor 124 is also provided with a ground crimp 1242 for connection to the PCB. The ground crimp 1242 can also adopt the same structure as the signal crimp 1222, such as a fisheye terminal or a straight pin. The connection method between the differential signal conductor 122 and the ground conductor 124 and the insulating frame 120 can adopt a connection method commonly used in the art, without limitation.

[0053] The grounding conductor 124 provides a stable reference level for the differential signal conductors, ensuring that the voltage difference of the signal can be accurately resolved. Simultaneously, the grounding conductor 124 forms a shielding layer around the differential signal conductors 122, preventing interference from external electromagnetic fields on the signal lines and reducing crosstalk between the differential signal conductors 122. The differential signal conductors 122 and grounding conductors 124 are spaced apart and adjacent to each other, with grounding conductors 122 on both sides of the differential signal conductors 122, providing shielding for signal transmission within the differential signal conductors 122. In the same chip card structure 12, multiple differential signal conductors 122 and grounding conductors 124 are included, spaced apart, for example, using BABABABAB (where A represents the differential signal conductor 122 and B represents the grounding conductor 124). It should be noted that the number of differential signal conductors 122 or grounding conductors 124 included in each chip card structure 12 can be selected according to actual needs and is not limited here.

[0054] Furthermore, such as Figures 5-8As shown, in this embodiment, a torsion section 126 is provided between the grounding contact 1240 and the grounding transmission section 1244. The size of the torsion section 126 is adapted to the thickness of the insulating frame 120. After being twisted by the torsion section 126, the grounding transmission section 1244 is connected to the first contact arm 1240a and the second contact arm 1240b of the grounding contact 1240. Here, "torsion" refers to the torsional deformation of the torsion section 126 connected to the grounding contact 1240, thereby placing the grounding contact 1240 and the grounding transmission section 1244 in different planes. The size of the torsion section 126 is adapted to the thickness of the insulating frame 120, thus encapsulating and fixing it within the insulating frame 120, fixing the grounding conductor 124 within the insulating frame 120. After being twisted by the torsion section 126, the grounding transmission section 1244 extends and then branches into the first contact arm 1240a and the second contact arm 1240b, forming the grounding contact 1240. In this embodiment, the torsion angle of the torsion section 126 is 44°-146°, thereby enabling the first contact arm 1240a and the second contact arm 1240b to contact the subsequent sleeve. Furthermore, in this embodiment, the torsion angle of the torsion section 126 is 90°. A torsion angle of 90° allows for more precise contact with the sleeve, improving the shielding effect.

[0055] The first ends of the first contact arm 1240a and the second contact arm 1240b are connected to the torsion section 126. The first contact arm 1240a and the second contact arm 1240b are bent from the first ends away from each other to form a bent portion 130, and then gradually approach each other along the extension direction, and then extend towards the end, and gradually approach each other along the extension direction. The distance between the first contact arm 1240a and the second contact arm 1240b at the end is smaller than the distance at the bent portion 130. The distance between the first contact arm 1240a and the second contact arm 1240b gradually decreases from the first end to the end, forming a spatial structure that is narrow at the top and wide at the bottom. The bent portion 130 is used to be engaged with the edges of two adjacent sleeves. When the first contact arm 1240a and the second contact arm 1240b are engaged with the edge of the sleeve through the bent portion 130, the narrower ends can stably abut against the sleeve, improving the stability of the contact between the grounding contact 1240 and the sleeve.

[0056] In this embodiment, the ends of the first contact arm 1240a and the second contact arm 1240b are bent outward to form a mating guide 132. The distance between the closest points of the first contact arm 1240a and the second contact arm 1240b in the mating guide 132 is smaller than the distance at the bends 130. When the mating connector mates with the docking connector, the mating guide 132 guides the grounding contact 1240 to smoothly enter the sleeve. In this embodiment, the mating guide 132 is generally strip-shaped and bends towards the differential signal conductor 122, thereby giving the first contact arm 1240a and the second contact arm 1240b an arcuate protrusion in the direction of proximity to each other. This arcuate protrusion forms a contact point in subsequent contact with the sleeve.

[0057] Furthermore, a connecting section 1241 is provided between the torsion section 126 and the grounding contact 1240. This connecting section, via the torsion section 126, is located on a different plane from the grounding transmission section. The first contact arm 1240a and the second contact arm 1240b are located on opposite sides of the connecting section. The connecting section 1241 is generally a rectangular sheet structure. One side of this rectangle connects to the torsion section 126, and the other side has the first contact arm 1240a and the second contact arm 1240b. The first contact arm 1240a and the second contact arm 1240b extend from the connecting section 1241 in a direction away from it. That is, both the first contact arm 1240a and the second contact arm 1240b are conductors of a predetermined length to facilitate subsequent contact with the grounding component of the mating connector 2. The connecting section 1241, the torsion section 126, and the grounding transmission section 1244 are integrally formed and are all made of commonly used conductive metal materials in the art. Figure 6 and Figure 8 As shown, during manufacturing, the torsion section 126 is twisted relative to the plane of the connecting section 1241, so that the plane of the connecting section 1241 is on a different plane. The first contact arm and the second contact arm are located on opposite sides of the connecting section 1241 via the bending portion 130, facilitating contact with two different sleeves.

[0058] By twisting the grounding contact 1240 via the torsion section 126, the first contact arm 1240a and the second contact arm 1240b can make contact with different grounding structures of the mating connector 2, making the entire daughter card structure 12 share a common ground and improving the overall shielding effect of the daughter card structure 12. In addition, twisting the grounding contact 1240 can reduce the volume occupied by the grounding contact 1240, which is beneficial to reducing the size of the connector. At the same time, twisting the torsion section 126 can make the connecting section 1241 protrude from the plane where the differential signal conductor 122 is located, that is, both ends of the connecting section 1241 extend out of the insulating frame 120, which facilitates the subsequent connection with the shielding sheet 14 and helps to improve the shielding effect.

[0059] Please continue reading Figure 6 and Figure 8 In this embodiment, the first contact arm 1240a and the second contact arm 1240b are arranged along the length direction of the connecting segment 1241, that is, the first contact arm 1240a and the second contact arm 1240b are relatively offset. Relative offset means that the first contact arm 1240a and the second contact arm 1240b are face-to-face, but there is a certain angle or positional offset between them. This offset arrangement of the first contact arm 1240a and the second contact arm 1240b saves space occupied by the grounding contact 1240 and simplifies the manufacturing process. For example, the first contact arm 1240a and the second contact arm 1240b can be cut along the extension direction after being twisted by the twisting segment 126, saving subsequent welding processes and improving the stability of the grounding contact.

[0060] In other embodiments, the first contact arm 1240a and the second contact arm 1240b may also be configured in other ways, such as face-to-face.

[0061] Please continue reading. Figure 4 and Figure 5 In this embodiment, the differential signal conductor 122 is a differential signal pair, and the signal contact 1220 is a duckbill structure. When the plug connector 1 and the mating connector 2 are mated, the pins of the mating connector 2 are inserted into the signal contact 1220 of the duckbill structure, which improves the stability of the contact between the pins and the signal contact 1220 and is beneficial to improving the signal transmission quality.

[0062] The following will describe the plug-in connector 1 that includes the aforementioned sub-card structure 12.

[0063] like Figure 1 , Figure 2 , Figure 4 and Figure 10 As shown, one embodiment of the plug connector 1 includes a housing 10, a plurality of stacked sub-card structures 12, and shielding sheets 14. Each sub-card structure 12 has a shielding sheet 14 on each of its opposite sides, and the shielding sheet 14 is in contact with a grounding conductor 124. The plurality of sub-card structures 12 and shielding sheets 14 are all disposed in the housing 10.

[0064] Each sub-card structure 12 has shielding plates 14 on both opposite sides; that is, each sub-card structure 12 has two shielding plates 14, which are in contact with the grounding conductor 124. For details, please refer to [the relevant documentation / reference]. Figure 1 , Figure 5 , Figure 9 and Figure 11The shielding sheet 14 is recessed towards the ground transmission section 1244 corresponding to the ground conductor 124, that is, a groove 140 is formed on the surface of the shielding sheet 14. The extending direction of the groove 140 is consistent with the extending direction of the ground transmission section 1244, and the bottom of the groove 140 contacts the ground transmission section 1244. Through the grooves 140 of the shielding sheets 14 on both sides and the adjacent ground conductors 124 on both sides, a closed shielding structure can be formed around the differential signal conductor 122, reducing the impact of electromagnetic interference on signal transmission, improving the electromagnetic shielding effect, and ensuring the signal transmission quality.

[0065] A grounding conductor 124 is disposed within an insulating frame 120, which is perforated. The grounding transmission segment 1244 of the grounding conductor 124 protrudes from the insulating frame 120 through the perforated portion. Each shielding sheet 14 has a groove 140 corresponding to the exposed portion of the grounding transmission segment 1244, with the bottom of the groove 140 contacting the grounding transmission segment 1244. To improve the stability of the contact between the shielding sheet 14 and the grounding transmission segment 1244, the shielding sheet 14 can be spot-welded to the bottom of the groove 140. In other embodiments, solder joints may be omitted, and the groove 140 of the shielding sheet 14 can be directly connected to the grounding transmission segment 1244.

[0066] Furthermore, as described above, the first contact arm 1240a and the second contact arm 1240b of the grounding contact 1240 are twisted by the torsion section 126, causing both ends of the connecting section 1241 to protrude from the insulating frame 120. When the shielding sheet 14 is installed on both sides of the sub-card structure 12, the grounding conductor 124 can contact the shielding sheets 14 on both sides through the protruding ends of the connecting section 1241, further improving the shielding effect.

[0067] Please refer to the following: Figure 4 , Figure 9 , Figure 10 and Figure 11 The shielding plates 14 on both sides of the sub-card structure 12 extend parallel to the signal contact 1220 at the end near the signal contact 1220 until they are flush with the end of the signal contact 1220. Furthermore, the two shielding plates 14 are spaced apart on both sides of the signal contact 1220, forming a receiving space. The portion of the shielding plate 14 near the bottom of the signal contact 1220 bends away from the signal contact 1220 and then extends parallel to the signal contact 1220. The receiving space formed by the two shielding plates 14 on both sides of the signal contact 1220 serves to protect the signal contact 1220 and the grounding contact 1240, and also provides guidance when the sub-card structure 12 is installed into the housing 10.

[0068] Sub-card structures 12, each equipped with a shielding plate 14, are stacked sequentially within the housing 10 to form a plug-in connector 1. For example... Figure 12 and Figure 13 As shown, in this embodiment, the housing 10 includes a first surface and a second surface disposed opposite to each other. The first surface is provided with multiple rows of plug-in structures 112, and the second surface is provided with multiple rows of receiving structures 114. The receiving structures 114 correspond to the plug-in structures 112 and are connected to the plug-in structures 112.

[0069] The surface of the housing 10 closest to the sub-card structure 12 is the first surface, and the surface furthest from the sub-card structure 12 is the second surface. The insertion structure 112 on the first surface accommodates the signal contact 1220 and ground contact 1240 of the sub-card structure 12, while the receiving structure 114 on the second surface accommodates the structure of the mating connector 2. The insertion structure 112 on the first surface has multiple rows, the number of rows being the same as the number of sub-card structures 12. For example, when there are 8 sub-card structures 12, the corresponding number of rows of insertion structures 112 is also 8, with one sub-card structure 12 per row of insertion structures 112. Similarly, the receiving structure 114 on the second surface also has multiple rows, the number of rows being the same as the number of sub-card structures 12. That is, each row of insertion structures 112 corresponds to one row of receiving structures 114. The receiving structure 114 is connected to the plug-in structure 112 so that the signal contact 1220 and the ground contact 1240 of the daughter card structure 12 can be inserted into the plug-in structure 112 and the receiving structure 114 to facilitate mating with the docking connector 2.

[0070] Furthermore, such as Figure 14 As shown, in this embodiment, the plug-in structure 112 includes a first plug-in cavity 112a for accommodating a signal contact 1220 and a second plug-in cavity 112b for accommodating a ground contact 1240. In each row of plug-in structures 112, the number of first plug-in cavities 112a and the number of second plug-in cavities 112b are the same as the number of signal contacts 1220 and ground contacts 1240. For example, with... Figure 4Taking the sub-card structure 12 as an example, the sub-card structure 12 includes four differential signal conductors 122, each of which is a differential signal pair, and each differential signal pair includes two differential signals. Therefore, correspondingly, the plug-in structure 112 of the sub-card structure 12 includes eight first plug-in cavities 112a, each used to insert a signal contact 1220 for each of the eight differential signals. Grounding contacts 1240 are provided on both adjacent sides of each differential signal pair. Each grounding contact 1240 includes a first contact arm 1240a and a second contact arm 1240b, wherein each first contact arm 1240a corresponds to one second plug-in cavity 112b, and each second contact arm 1240b corresponds to one second plug-in cavity 112b. Therefore, the number of first plug-in cavities 112a corresponds to the number of differential signals, and the number of second plug-in cavities 112b corresponds to the number of first contact arms 1240a and second contact arms 1240b.

[0071] Insulating structures are provided between two adjacent first plug-in cavities 112a, and between a first plug-in cavity 112a and an adjacent second plug-in cavity 112b, to separate the two adjacent first plug-in cavities 112a and the first plug-in cavity 112a and the adjacent second plug-in cavity 112b. Both the first plug-in cavity 112a and the second plug-in cavity 112b are through-hole structures.

[0072] Please continue reading. Figure 10 and Figure 14 In this embodiment, the adjacent plug-in structures 112 are provided with gaps 113 for accommodating shielding sheets 14. As described above, shielding sheets 14 are provided on opposite sides of the sub-card structure 12, and the two shielding sheets 14 form a receiving space at one end near the signal contact 1220, which is used to accommodate the plug-in structure 112. When the sub-card structure 12 is installed into the housing 10, the signal contact 1220 is inserted into the first plug-in cavity 112a, and the ground contact 1240 is inserted into the second plug-in cavity 112b. The shielding sheets 14 on both sides of the signal contact 1220 and the ground contact 1240 are inserted into the gaps 133 between the two adjacent plug-in structures 112. The width of the receiving space formed by the two shielding plates 14 at the end near the signal contact 1220 matches the width of the plug-in structure 112, which allows the shielding plates 14 to be stably locked on both sides of the plug-in structure 112, improving the stability of the sub-clamp structure 12 and enhancing the stability of the plug-in positions of the signal contact 1220 and the grounding contact 1240 in the first plug-in cavity 112a and the second plug-in cavity 112b.

[0073] The shapes of the first insertion cavity 112a and the second insertion cavity 112b can be selected according to actual needs, for example, they can be square or circular. The depths of the first insertion cavity 112a and the second insertion cavity 112b are selected based on the lengths of the signal contact 1220 and the ground contact 1240, and are not limited here. Furthermore, the positions of the first insertion cavity 112a and the second insertion cavity 112b correspond to the positions of the signal contact 1220 and the ground contact 1240. For example, in a row of insertion structures 112, if the signal contacts 1220 are all on the same straight line, then the first insertion cavity 112a is also on the same straight line. In this embodiment, because the ground contact 1240 is twisted, the first contact arm 1240a and the second contact arm 1240b are offset, so correspondingly, the second insertion cavity 112b for accommodating the first contact arm 1240a and the second insertion cavity 112b for accommodating the second contact arm 1240b also need to be offset. For example, in Figure 13 In the middle, two adjacent second connectors 112b are staggered to match the positions of the first contact arm 1240a and the second contact arm 1240b.

[0074] The receiving structure 114 on the second surface of the housing 10 will be described next.

[0075] On the surface of the housing 10 for mating with the docking connector 2, i.e., the second surface, a receiving structure 114 is provided. The receiving structure 114 corresponds to and communicates with the insertion structure 112. The signal contact 1220, which is inserted into the first insertion cavity 112a in the insertion structure 112, can extend into the receiving structure 114 to mate with the pins of the docking connector 2. The second surface has multiple rows of receiving structures 114, and the number of rows of receiving structures 114 is the same as the number of rows of insertion structures 112. For example, if the number of rows of insertion structures 112 is 8, the number of rows of receiving structures 114 is also 8, and the rows of receiving structures 114 are arranged in parallel.

[0076] Please see Figure 12 and Figure 15 In this embodiment, each column of receiving structures 114 includes multiple receiving slots 116, which are arranged sequentially, and adjacent receiving slots 116 are separated by insulating components. The insulating components are made of the same material as the housing 10, and can be made of materials commonly used in the art, without limitation.

[0077] Furthermore, in this embodiment, the receiving groove 116 is an O-shaped or approximately rectangular closed structure. The receiving groove 116 is used to accommodate the sleeve of the mating connector 2. When the plug connector 1 mates with the mating connector 2, the signal contact 1220 of the differential signal conductor 122 is inserted into the first plug cavity 112a and then surrounded by the sleeve disposed in the receiving groove 116. The closed structure of the sleeve provides a closed shielding structure for signal transmission, improving the electromagnetic shielding effect. The receiving groove 116 is formed by recessing a certain distance from the second surface of the housing 10, or it can be formed by cutting or chiseling on the second surface. The receiving groove 116 has a certain width to accommodate the sleeve of the mating connector 2.

[0078] Please continue reading. Figure 15 The receiving structure 114 also includes a signal hole 116a, which corresponds to and communicates with the first insertion cavity 112a. In this embodiment, each signal hole 116a corresponds to two first insertion cavities 112a, and the two first insertion cavities 112a are respectively used to accommodate differential signal pairs. Therefore, as Figure 14 and 15 As shown, taking one of the receiving slots 116 as an example, from the first surface of the housing 10, the two first insertion cavities 112a are separated by an insulating component. From the second surface of the housing 10, the two first insertion cavities 112a correspond to one signal hole 116a.

[0079] As described above, the receiving groove 116 and the signal hole 116a have the same center point, forming a nested rectangle, as shown. Figure 15 As shown, the receiving structure 114 also includes an isolator 1162, which is located between the signal hole 116a and the receiving groove 116. The receiving groove 116 communicates with the second insertion cavity 112b, and the grounding contact 1240 is located in the second insertion cavity 112b and the receiving groove 116. Figure 15 As shown, both the signal hole 116a and the receiving groove 116 are O-shaped or generally rectangular closed structures. Furthermore, the receiving groove 116 is a through groove, and a limiting structure is provided at the bottom of the receiving groove 116 to prevent the sleeve from protruding beyond the first surface of the housing 10. The isolator 1162 can be made of the same insulating material as the housing 10 and is integrally formed with the housing 10.

[0080] Furthermore, each row of receiving structures 114 includes multiple receiving slots 116, with adjacent receiving slots 116 separated by partitions 1164. In this embodiment, since the receiving slots 116 are closed structures, adjacent receiving slots 116 in each row of receiving slots 116 are isolated. The isolation structure between each receiving slot 116 is the partition 1164. Therefore, the partition 1164 is not a separately provided component, but a structure formed between adjacent receiving slots 116 by the closed structure of the receiving slots 116. The partition 1164 is part of the housing 10 and is integrally formed with the housing 10. Each partition 1164 has receiving slots 116 on both sides. Since the receiving slots 116 communicate with the second insertion cavity 112b, when the insertion connector 1 and the mating connector 2 are engaged, the first contact arm 1240a and the second contact arm 1240b of the grounding contact 1240 respectively contact two adjacent sleeves. That is, a grounding contact 1240 contacts the two sleeves simultaneously through the first contact arm 1240a and the second contact arm 1240b, realizing the overall common ground of the sub-card structure and improving the overall grounding effect.

[0081] In addition, such as Figure 13 and Figure 14 As shown, the housing 10 includes multiple rows of plug-in structures 112, with gaps 113 between adjacent rows of plug-in structures 112. These gaps 113 accommodate shielding plates 14. In this embodiment, a metal plate is also provided inside the housing 10, located within the gaps 113 and in contact with the shielding plates 14. When the plug-in connector 1 mates with the mating connector 2, the metal plate is located between the sleeve and the shielding plate 14, contacting both, thereby improving the grounding effect of the connector. In other embodiments, the metal plate may be omitted, and the sleeve may directly contact the shielding plate 14.

[0082] The following will further explain the arrangement of the housing structure 114.

[0083] As described above, the plug-in connector 1 includes multiple stacked daughter card structures 12. The multiple daughter card structures 12 can be identical or different in construction. For example, the daughter card structures 12 can adopt... Figure 4 The structure shown can also be adopted as follows: Figure 26 The structure shown, or simultaneously using Figure 4 and Figure 26 The structure shown. Figure 1 and Figure 2 Taking the plug connector 1 shown as an example, this plug connector 1 can use 8 pieces. Figure 4 The sub-card structure shown is 12, but it can also be 8 cards. Figure 26 The sub-card structure 12 shown can also be made of 4 cards. Figure 4 The sub-card structures 12 and 4 shown are shown. Figure 26 The sub-card structure 12 is shown.

[0084] The following will be described as 4 pieces of plug connector 1. Figure 4 The sub-card structure 12 (hereinafter referred to as "Type 1") and 4 blocks shown are shown. Figure 26 Taking the shown sub-card structure 12 (hereinafter referred to as "second type") as an example, the arrangement of the receiving structure 114 will be explained. When the plug connector 1 includes two types of sub-card connectors, the two types of connectors are arranged alternately, that is, stacked sequentially in the manner of first type / second type / first type / second type... The difference between the first type and the second type of sub-card structure 12 is that the structure of the insulating frame 120 is different. When the first type and the second type of sub-card structures are arranged adjacent to each other, the differential signal conductor 122 in the first type of sub-card structure 12 is offset from the differential signal conductor 122 in the second type of sub-card structure 12.

[0085] When adjacent sub-card structures 12 are of different types, the arrangement of the insertion structures 112 corresponding to the sub-card structure 12 will also change. Similarly, the arrangement of the receiving structures 114 corresponding to the sub-card structure 12 will also change. The offset between the receiving structures 114 of adjacent columns is 0.5mm-3mm, such as... Figure 12 and Figure 15 As shown, in this embodiment, the accommodating structures 114 of adjacent columns are staggered, with an offset of 2mm. Specifically, the accommodating structures 114 of odd-numbered columns are arranged identically, and the accommodating structures 114 of even-numbered columns are arranged identically, with the even-numbered columns offset relative to the odd-numbered columns. "Identical" here means that the starting and ending points of the accommodating structures 114 are on the same straight line. For example, the four starting points and four ending points of the four accommodating structures 114 of the four odd-numbered columns are on the same straight line. "Offset" means that the starting and ending points of the accommodating structures 114 of adjacent columns are not on the same straight line, but are moved upwards or downwards by a distance parallel to each other. Taking the accommodating structures 114 of column L1 and column L2 shown in the figure as examples, the offset distance between them is 2mm. That is, the offset of the accommodating structure 114 of column L2 relative to the accommodating structure 114 of column L1 is 2mm. The offset can be the distance between the starting ends of adjacent columns, as shown in h1 in the figure.

[0086] Since the receiving structure 114 and the plug-in structure 112 are arranged in a corresponding manner, when the receiving structure 114 is arranged in a staggered manner, the corresponding plug-in structure 112 is also arranged in a staggered manner. The offset of the plug-in structure 122 is the same as the offset of the receiving structure 114, which will not be described in detail here.

[0087] The staggered arrangement of the accommodating structure 114 can reduce interference between differential signals in adjacent columns and improve the signal transmission quality of the connector.

[0088] In other embodiments, when the sub-card structure 12 of the plug connector 1 is of the same type, the adjacent columns of receiving structures 114 have the same arrangement, that is, the starting ends of all receiving structures 114 are on the same straight line, and the ending ends are also on the same straight line.

[0089] Furthermore, the housing 10 in this embodiment adopts a one-piece structure and is made of insulating material. The type of insulating material can be any commonly used insulating material in the art, and is not limited here.

[0090] like Figure 13 As shown, in this embodiment, the housing 10 includes a base 110 and sidewalls 120 disposed on opposite sides of the base 110, with the base 110 and sidewalls 120 integrally formed. The base 110 has an open shape with an enclosing structure, and the sub-card structure 12 engages with the insertion structure 112 through the openness of the base 110 and is partially accommodated within the base 110. Multiple parallel slots are provided on the inner wall of the sidewalls 120, which are used to engage the insulating frame 120 of the sub-card structure 12, thereby retaining the sub-card structure 12 within the housing 10. The number of slots is the same as the number of sub-card structures 12.

[0091] The sidewall 120 extends from the base 110 in a direction away from the base 110, and is used to mate with the housing of the mating connector 2. In this embodiment, the outer surface of the sidewall 120 is provided with a guide 1200. The guide 1200 is used to provide guidance and fixation when mating with the mating connector 2. The guide 1200 is provided in a manner extending along the sidewall 120 and is integrally formed with the sidewall 120. The structure of the guide 1200 can be selected according to actual conditions; for example, the guide 1200 can be a guide rib or a guide groove. The number of guides 1200 can be selected according to actual needs and is not limited here.

[0092] The following describes the mating connector 2, which mates with the plug connector 1. When the mating connector 2 mates with the plug connector 1, a connector is formed, enabling signal transmission from one PCB board to another.

[0093] like Figure 1 , Figure 2 , Figure 16 and Figure 17As shown, in this embodiment, the connector includes the aforementioned plug connector 1 and a mating connector 2 that mates with the plug connector 1. The mating connector 2 includes a housing 20 and multiple rows of mating structures 212 disposed on the housing 20. The mating structures 212 correspond to the plug structure 112 and the receiving structure 114. The mating structures 212 communicate with the receiving structure 114 and the plug structure 112. When the mating structure 212 mates with the receiving structure 114, the signal contact 1220 and the ground contact 1240 are housed in the plug structure 112 and extend into the receiving structure 114. The signal contact 1220 and the ground contact 1240 contact the mating structure 212, thus forming a connector.

[0094] The mating structure 212 is disposed on the side of the housing 20 near the mating connector 2. Multiple rows of mating structures 212 are arranged in parallel. The arrangement of the mating structures 212 on the housing 20 is the same as the arrangement of the receiving structure 114 on the second surface. For example, when the receiving structure 114 has 8 rows, the mating structure 212 also has 8 rows. When the receiving structure 114 is staggered, the mating structure 212 is also staggered.

[0095] Furthermore, such as Figure 17-21 As shown, each row of docking structures 212 includes a plurality of sleeves 2120 arranged sequentially, the shape of which matches the shape of the receiving groove 116. The number of sleeves 2120 in each row of docking structures 212 is the same as the number of differential signal conductors 122 in the plug connector 1. In this embodiment, each daughter card structure 12 in the plug connector 1 includes 4 differential signal conductors 122, therefore, the number of sleeves 2120 in each row of docking structures 212 is also 4, and the 4 sleeves 2120 extend in a direction away from the outer shell 20.

[0096] In this embodiment, the sleeve 2120 is a cuboid structure with openings at both ends. One end is used to mate with the plug connector 1, and the other end is used to connect to the PCB board. The depth of the sleeve 2120 matches the depth of the receiving groove 116. As described above, the receiving structure 114 also includes an isolator 1162 and a signal hole 116a. The isolator 1162 surrounds the signal hole 116a. The receiving groove 116 communicates with the second plug cavity 112b, and the grounding contact 1240 is located in the second plug cavity 112b and the receiving groove 116. When the plug connector 1 mates with the mating connector 2, the side wall of the sleeve 2120 is inserted into the receiving groove 116, and the grounding contact 1240 contacts the sleeve 2120. The contact between the grounding contact 1240 and the sleeve 2120 can be either with the inner wall or the outer wall of the sleeve 2120, both of which can achieve the grounding effect. Alternatively, both the first contact arm 1240a and the second contact arm 1240b may contact the outer or inner wall of the sleeve 2120, or one may contact the inner wall of the sleeve 2120 and the other may contact the outer wall of the sleeve 2120. In this embodiment, both the first contact arm 1240a and the second contact arm 1240b are located inside the sleeve 2120 and abut against the inner wall of the sleeve 2120.

[0097] Furthermore, a partition 1164 is provided between adjacent receiving slots 116, and the first contact arm 1240a and the second contact arm 1240b are located on opposite sides of the partition 1164. Since the receiving slots 116 are closed structures, adjacent receiving slots 116 are isolated in each row of receiving slots 116. The isolation structure between each receiving slot 116 is the partition 1164. Therefore, the partition 1164 is not a separately provided component, but a structure formed between adjacent receiving slots 116 due to the closed structure of the receiving slots 116. Two adjacent sleeves 2120 are separated by the partition 1164, and the first contact arm 1240a and the second contact arm 1240b of the same grounding contact 1240 abut against the two adjacent sleeves 2120 respectively. Figure 24 and Figure 25 As shown, the first contact arm of the grounding contact G1 extends into the sleeve P1 and abuts against the inner wall of the sleeve P1. The second contact arm extends into the P2 sleeve and abuts against the inner wall of the P2 sleeve 2120. Therefore, one grounding contact G1 can simultaneously abut against both sleeves P1 and P2 via the first and second contact arms. Similarly, one sleeve 2120 can simultaneously connect to two grounding contacts 1240. Taking the P2 sleeve as an example, one of its inner walls abuts against the grounding contact G1, and the other inner wall abuts against the grounding contact G2. This configuration enables overall grounding of the connector, improving signal transmission quality.

[0098] Please continue reading. Figure 17In this embodiment, a pin 2122 is provided inside the sleeve 2120, and the pin 2122 corresponds to the first insertion cavity 112a. In the plug connector 1, the signal contact 1220 is inserted into the first insertion cavity 112a and extends into the signal hole 116a. When the plug connector 1 mates with the mating connector 2, the pin 2122 is inserted into the signal hole 116a and contacts the signal contact 1220.

[0099] Furthermore, in this embodiment, the sleeve 2120 contains two pins 2122. When the differential signal conductors 122 of the plug connector 1 are differential signal pairs, the two pins 2122 respectively contact the two differential signals. In this embodiment, the signal contact 1220 of the differential signal pair has a duckbill structure, which is used to accommodate the pins 2122 inside the sleeve 2120. The front end of the duckbill structure, i.e., the signal contact 1220, is designed in a shape similar to a duckbill, with two symmetrical contact arms, similar to the two beaks of a duck. When the mating connector 2 mates with the plug connector 1, the pins 2122 are inserted between the two contact arms of the duckbill structure. The duckbill structure has good elasticity and can provide appropriate pressure when the pins 2122 are inserted, ensuring a stable electrical connection and reducing the risk of poor contact.

[0100] The distance between the two pins 2122 inside the sleeve 2120 is 0.5-2mm. More specifically, in this embodiment, the distance between the two pins 2122 inside the sleeve 2120 is 1.45mm. The distance between the two pins 2122 inside the sleeve 2120 matches the distance between the two differential signals in the differential signal pair. Figure 28 As shown, in this embodiment, the pin 2122 is a straight pin structure. The height of the pin 2122 is less than the height of the sleeve 2120. The sleeve 2120 surrounds the pin 2122 and can protect the pin 2122. In addition, one end of the pin 2122 is used to contact the differential signal conductor 122, and the other end extends out of the outer shell 20 for connection with the PCB board.

[0101] As described above, when the plug connector 1 is composed of two types of daughter card structures 12 stacked alternately, the receiving structures 114 in adjacent columns are staggered. Correspondingly, the mating structures 212 of the mating connector 2 are also staggered, with an offset of 2 mm.

[0102] Please continue reading. Figures 18-21The sleeve 2120 is an open, through-hole cylindrical shape, including a mating end away from the housing 20 and a fixed end opposite to the mating end. The sleeve 2120 is connected to the housing 20 through the fixed end. The mating end of the sleeve 2120 is a flush port, the shape of which matches the shape of the receiving groove 116 of the plug connector. The sleeve 2120 is an open, through-hole cuboid shape, with a flush mating end and a fixed end including a narrow side and a wide side. The narrow side is provided with pins 2124, which pass through and extend out of the housing 20 for connection with the PCB board. The wide side is provided with tabs, which are inserted into and connected to the housing 20 to fix the sleeve 20 within the housing 20.

[0103] like Figure 19 and Figure 20 As shown, in this embodiment, the outer shell 20 includes a base 210 and an outer wall 220. The outer wall 220 is disposed on opposite sides of the base 210 and connected to the base 210. The outer wall 220 extends from the base 210 in a direction perpendicular to the base 210, and a guide 222 is provided on the inner side of the outer wall 220. The guide 222 extends along the extending direction of the outer wall 220 and matches the guide 1200 of the plug-in connector 1. For example, when the guide 1200 of the plug-in connector 1 is a guide rib, the guide 222 can be a guide groove. When the plug-in connector 1 and the mating connector 2 are engaged, the guide rib moves along the guide groove until the plug-in connector 1 and the mating connector 2 are connected. Similarly, when the guide 1200 of the plug-in connector 1 is a guide groove, the guide 222 can be a guide rib. In this embodiment, the base 210 and the outer wall 220 are integrally formed.

[0104] Additionally, the base 210 includes a first surface near the sleeve 2120 and a second surface away from the sleeve 2120. The first surface has a sleeve mounting groove 214 and a pin fixing member 216, with the sleeve mounting groove 214 surrounding the pin fixing member 216. The sleeve mounting groove 214 is used to mount the sleeve 2120, and the bottom of the sleeve 2120 is accommodated within it. The sleeve mounting groove 214 is a through groove of a certain depth, and a limiting part 2140 is provided at the bottom of the sleeve mounting groove 214. The limiting part 2140 is connected to the pin fixing member 216 and is integrally formed with the outer shell 20. The sleeve mounting groove 214 is generally rectangular, and limiting parts 2140 are provided at each of the four corners of the sleeve mounting groove 214 to maintain and restrict the position of the sleeve 2120. A short slit and a long slit are formed between adjacent limiting portions 2140, wherein the short slit is for the pin 2124 of the sleeve 2120 to pass through the housing 20. The long slit is for the tab of the sleeve 2120 to pass through and be fixed to the housing 20. The pin retainer 216 includes a mounting hole 2160 for fixing the pin.

[0105] like Figure 23As shown, in this embodiment, the second surface of the base 210 is provided with a ground plate 22, and the ground plate 22 is provided with a first through hole 200 and a second through hole 202. The first through hole 200 communicates with the mounting hole 2160 of the pin fixing member 216. Figure 27 and 28 As shown, in this embodiment, the insert pin 2122 is a straight pin, which is fixed to the mounting hole 2160 and extends out of the ground plate 22 through the first through hole 200. The second through hole 202 corresponds to the short slit of the sleeve mounting groove 214 and communicates with the sleeve mounting groove 214. The pin 2124 of the sleeve 2120 passes through the short slit and the second through hole 202 in sequence, and extends out of the second through hole 202 to contact the ground plate 22.

[0106] The connector will be further described below with specific embodiments.

[0107] like Figure 1 , Figure 2 and Figure 24 As shown, in this embodiment, the connector includes a plug connector 1 and a mating connector 2;

[0108] The plug-in connector 1 includes a housing 10, eight stacked daughter card structures 12, and a shielding plate 14. There are two types of daughter card structures 12, which are alternately arranged. Each daughter card structure 12 includes an insulating frame 120, adjacent differential signal conductors 122, and a ground conductor 124. Multiple daughter card structures 12 are fixed together by fixing plates. The shielding plates 14 are located on opposite sides of each daughter card structure 12.

[0109] The mating connector 2 includes a housing 20, a plurality of sleeves 2120 disposed in the housing 20, and pins 2122 located within the sleeves 2120.

[0110] The housing 10 of the plug connector 1 is inserted into the housing 20 of the mating connector 2.

[0111] The differential signal conductor 122 includes a duckbill-shaped signal contact 1220, a signal crimp 1222, and a ground transmission section 1244 located between the signal contact 1220 and the ground crimp 1242;

[0112] The grounding conductor 124 includes a grounding contact 1240, a grounding crimp 1242, and a grounding transmission section 1244 located between the grounding contact 1240 and the grounding crimp 1242. A torsion section 126 is provided between the grounding contact 1240 and the grounding transmission section 1244, and the torsion angle of the torsion section 126 is 90°. The grounding transmission member 1240 includes a first contact arm 1240a and a second contact arm 1240b connected to each other. The first contact arm 1240a and the second contact arm 1240b are offset and located on opposite sides of the connecting section 1241, respectively.

[0113] The housing 10 includes a first surface and a second surface disposed opposite to each other. The first surface has eight rows of insertion structures 112 for receiving the daughter card structure 12. Each insertion structure 112 includes a first insertion cavity 112a for accommodating differential signal pairs and a second insertion cavity 112b for accommodating grounding contacts 1240. Each first insertion cavity 112a includes two signal cavities, respectively accommodating the contacts of the two differential signals of the differential signal conductors 122. The second insertion cavity 112b is used to accommodate either the first contact arm 1240a or the second contact arm 1240b of the grounding contact 1240.

[0114] The second surface has eight rows of receiving structures 114, which are correspondingly arranged with the plug-in structures 112. Each row of receiving structures 114 includes multiple receiving slots 116. The receiving structure 114 also includes an isolator 1162 and a signal hole 116a. The isolator 1162 surrounds the signal hole 116a and is located between the signal hole 116a and the receiving slot 116. The signal hole 116a corresponds to and communicates with the first plug-in cavity 112a, and the receiving slot 116 communicates with the second plug-in cavity 112b. The signal contact 1220 is located in the first plug-in cavity 112a and the signal hole 116a, and the ground contact 1240 is located in the second plug-in cavity 112b and the receiving slot 116.

[0115] Sleeve 2120 is located in receiving groove 116, and two pins 2122 inside sleeve 2120 are respectively inserted into the duckbill structure of differential pair signal contact 1220 in first insertion cavity 112a. Sleeve 2120 forms a closed shielding structure around pins 2122 and signal contact 1220, and first contact arm 1240a and second contact arm 1240b respectively extend into two adjacent sleeves 2120 and abut against the inner wall of sleeve 2120.

[0116] The ends of the pins 2124 and pins 2122 of the sleeve 2120 extend out of the housing 20 and the ground plane 22 below the housing 20, and the pins 2124 of the sleeve 2120 are connected to the ground plane 22.

[0117] The receiving slots 116 in adjacent columns are staggered by an offset distance of 2mm. The receiving slots 116 in the interval columns are arranged in the same way.

[0118] like Figure 17 As shown, the sleeves 2120 in adjacent columns are staggered by an offset distance of 2mm. The distance h2 between the two pins 2122 inside the sleeve 2120 is 1.45mm, and the distance h3 between the mating structures of adjacent columns is 2mm. Here, the distance h3 between the mating structures of adjacent columns refers to the distance between the pins in adjacent columns.

[0119] In the aforementioned connector, the grounding contact 1240 is twisted via the torsion section 126, allowing one grounding contact 1240 to connect simultaneously to two adjacent sleeves 2120, thus achieving overall grounding of the connector and improving signal transmission quality. Furthermore, in terms of manufacturing, the torsion of the grounding contact 1240 via the torsion section 126 saves on welding steps, which helps to reduce costs.

[0120] Meanwhile, the pins 2122 inside the sleeve 2120 can stably contact the differential signal pair through the duckbill structure, ensuring good electrical and mechanical performance, enabling the connector to provide a stable signal transmission path and reduce signal distortion.

[0121] In addition, the sleeve 2120 is a through-tube structure, which can form a closed shielding structure around the signal contact 1220 and the pin 2122, resulting in good shielding effect. The staggered arrangement of the sleeve 2120 structure improves the connector's anti-interference capability and enhances signal transmission quality.

[0122] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0123] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A sub-card structure, characterized in that, include: Insulating frame; A differential signal conductor includes two pairs of signal conductors, each signal conductor including a signal contact, a signal crimping member, and a signal transmission section located between the signal contact and the signal crimping member, the signal transmission section being located within the insulating frame; A grounding conductor is provided at an interval from the differential signal conductor. The grounding conductor includes a grounding contact, a grounding crimp, and a grounding transmission section located between the grounding contact and the grounding crimp, the grounding transmission section being located within the insulating frame. A torsion section is provided between the grounding contact and the grounding transmission section. The size of the torsion section is adapted to the thickness of the insulating frame. After being twisted by the torsion section, the grounding transmission section is connected to the first contact arm and the second contact arm of the grounding contact.

2. The sub-card structure according to claim 1, characterized in that, The first end of the first contact arm and the second contact arm are connected to the torsion section. The first contact arm and the second contact arm are bent from the first end in a direction away from each other to form a bend, and then extend to the end and gradually approach each other along the extension direction. The distance between the first contact arm and the second contact arm at the end is smaller than the distance between the bends.

3. The sub-card structure according to claim 2, characterized in that, The ends of the first contact arm and the second contact arm are bent outward to form a plug-in guide; the distance between the closest points of the first contact arm and the second contact arm between the plug-in guide is less than the distance between the bent portions.

4. The sub-card structure according to any one of claims 1-3, characterized in that, The torsion section and the grounding transmission section are integrally formed.

5. The sub-card structure according to any one of claims 1-3, characterized in that, A connecting section is provided between the first contact arm and the second contact arm and the torsion section. The connecting section is located on a different plane from the grounding transmission section through the torsion section. The first contact arm and the second contact arm are located on opposite sides of the connecting section.

6. The sub-card structure according to any one of claims 1-3, characterized in that, The first contact arm and the second contact arm are offset relative to each other.

7. The sub-card structure according to any one of claims 1-3, characterized in that, The torsion angle of the torsion segment is 44°-146°.

8. A plug connector, comprising a housing, a plurality of daughter card structures as described in claim 1, and a shielding sheet; Multiple sub-card structures are stacked together, and shielding sheets are provided on opposite sides of each sub-card structure, with the shielding sheets in contact with the grounding conductor; The sub-card structure and the shielding sheet are disposed in the housing.

9. The plug connector according to claim 8, characterized in that, The housing includes a first surface and a second surface disposed opposite to each other. The first surface is provided with multiple rows of plug-in structures for inserting the sub-card structure. The second surface is provided with multiple rows of receiving structures, which correspond to and communicate with the plug-in structures.

10. The plug connector according to claim 9, characterized in that, The plug-in structure includes a first plug-in cavity for accommodating the signal contact and a second plug-in cavity for accommodating the ground contact. The accommodating structure includes a receiving groove, which communicates with the second plug-in cavity.

11. The plug connector according to claim 9, characterized in that, The accommodating structures of adjacent columns are staggered, with an offset of 0.5-3 mm between the accommodating structures of adjacent columns.

12. The plug connector according to any one of claims 8-11, characterized in that, The receiving structure includes a signal hole and an isolator, the isolator surrounding the signal hole and located between the receiving groove and the signal hole, the signal hole corresponding to and communicating with the first insertion cavity.

13. The plug connector according to claim 10 or 11, characterized in that, Each column of the receiving structure includes multiple receiving slots, with the first contact arm and the second contact arm located in two adjacent receiving slots, respectively.

14. The plug connector according to any one of claims 8-11, characterized in that, The two ends of the connecting section protrude from the insulating frame and contact the shielding sheet.

15. A connector comprising the plug connector of claim 8, and a mating connector cooperating with the plug connector, the mating connector comprising: The housing of the plug connector is located within the housing; The housing has multiple rows of docking structures, which correspond to the plug-in structure and the receiving structure. Each column of the docking structure includes multiple sleeves arranged in sequence. Each sleeve has a pin inside, which contacts the signal contact. The sleeve is located in the receiving groove and surrounds the pin and the signal contact pin. The first contact arm and the second contact arm respectively contact two adjacent sleeves in the same column.

16. The connector according to claim 15, characterized in that, The first contact arm and the second contact arm are respectively located in two adjacent sleeves and abut against the inner wall of the sleeve.

17. The connector according to claim 15 or 16, characterized in that, The sleeve is in contact with the shielding sheet.

18. The connector according to claim 17, characterized in that, The docking structures of adjacent columns are staggered by an offset of 0.5mm-3mm, and the offset of the docking structure is the same as the offset of the receiving structure.

19. The connector according to claim 17, characterized in that, The sleeve contains two straight pins, and the distance between the two pins is 0.5mm-2mm.

20. The connector according to claim 19, characterized in that, The signal contact is a duckbill structure, and the pin is located in the duckbill structure and abuts against the duckbill structure.

21. The connector according to claim 19 or 20, characterized in that, The offset of the docking structure between adjacent columns is 2mm, and the distance between the two pins inside the sleeve is 1.45mm.

22. The connector according to claim 15 or 16, wherein the torsion angle of the torsion segment is 90°, and the first contact arm and the second contact arm are located inside two adjacent sleeves and abut against the inner wall of the sleeve through the end.

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