High-density ultra-high-speed bus expansion electric connector

Abstract

The invention provides a high-density ultra-high-speed bus expansion electric connector, which comprises an insulating body provided with a lengthwise slot, two sides of the slot are provided with a plurality of terminal slots, and a fool-proof part is arranged in the slot and is used for dividing the insulating body into a power supply and low-speed signal area and a high-speed signal area; the terminals comprise differential signal terminals distributed in the high-speed signal area and other terminals distributed in the high-speed signal area and the power supply and low-speed signal area, every two differential signal terminals are adjacent, and every two adjacent differential signal terminals and an insulating block inserted into the insulating body are formed in an embedded mode; the other terminals are all independent terminals inserted into the corresponding terminal grooves of the insulating body, and the other terminals comprise grounding terminals arranged in a high-speed signal area; the grounding shielding sheet is connected with each grounding terminal; the high-density ultra-high-speed bus expansion electric connector can enable signal transmission to be better and more stable.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of connectors, and particularly relates to a high-density super-high-speed bus expansion electrical connector. BACKGROUND

[0002] Chinese patent CN202110318799.9 discloses a card edge connector, which comprises a longitudinal insulating body, two rows of terminals fixed to the insulating body, and an insulating block.

[0003] The insulating body comprises two side walls and a clamping groove extending between the two side walls in the longitudinal direction, the clamping groove extending upward. The side wall is provided with a terminal groove extending downward, and the terminal is respectively received in the corresponding terminal groove. The side wall is provided with a partition wall between adjacent terminal grooves. Each terminal groove comprises a fixing groove and a receiving groove.

[0004] The two rows of terminals are arranged in the corresponding side wall, and the terminal comprises a holding portion fixed in the fixing groove, an elastic portion extending upward from the holding portion and penetrating the receiving groove, and a pin extending out of the insulating body. The elastic portion has a contact portion protruding into the clamping groove, and the holding portion has a barb on both sides interfering with the side wall. The pin is used for welding to the circuit board. The receiving groove is provided for the terminal to be assembled upward from the bottom surface. The terminal comprises a plurality of signal terminals and a plurality of ground terminals. The structures of the two rows of terminals are substantially the same, and the structures of the signal terminals and the ground terminals are also substantially the same. The card edge connector further comprises an additional clamping groove extending in the longitudinal direction and independently existing, and a power terminal is installed in the additional clamping groove. The structure of the power terminal is also substantially the same as that of the signal terminal and the ground terminal.

[0005] The card edge connector further comprises an insulating block, the receiving groove where the signal terminal is located is filled with the insulating block, and the insulating block is pressed against the holding portion of the corresponding signal terminal, while the receiving groove where the ground terminal is located is not filled with the insulating block. The receiving groove where the signal terminal is located is filled with the insulating block, which isolates air and reduces crosstalk between the signal terminals, thereby improving the high-frequency performance of the card edge connector. The insulating block comprises a filling portion located on the lateral outer side and a buckling portion located on the lateral inner side. The filling portion and the buckling portion are spaced apart from each other, and the bottoms of the two are connected to form a connecting portion. The outer side surface of the filling portion is pressed against the signal terminal, and the buckling portion is buckled on the stepped surface provided on the inner wall surface of the receiving groove.

[0006] The card edge connector can improve the crosstalk between the signal terminals, but each signal terminal is in a separate terminal slot and the differential signal terminals are fixed by pressing the holding part of the differential signal terminals by the insulating block, the adjacent signal terminals are separated by the spacing wall extending from the holding part of the signal terminal to the top of the side wall of the insulating body, so that the two differential signal terminals cannot be closer, and the differential signal terminals need to be close to better coupling, the two differential signal terminals separated by the spacing wall from top to bottom have poor coupling, and large resonance is easy to occur when transmitting signals, which cannot ensure effective transmission of signals. Therefore, it needs to be improved. SUMMARY

[0007] The purpose of the present application is to provide a high-density ultra-high-speed bus expansion electrical connector to solve the problems raised in the background art.

[0008] To achieve the above purpose, the technical scheme used by the present application is: A high-density ultra-high-speed bus expansion electrical connector, comprising: An insulating body having a longitudinal slot recessed downward from the top surface for inserting an electronic module, a plurality of terminal slots are arranged in the longitudinal side walls on both sides of the slot respectively, and a foolproof part is arranged in the slot for separating the insulating body into power and low-speed signal area and high-speed signal area on both sides of the foolproof part; A plurality of terminals, including differential signal terminals distributed in the high-speed signal area and the remaining terminals distributed in the high-speed signal area and the power and low-speed signal area, each two differential signal terminals are adjacent, and each two adjacent differential signal terminals are embedded with an insulating block inserted into the insulating body, the remaining terminals are all independent terminals inserted into the corresponding terminal slots of the insulating body, and the remaining terminals include ground terminals arranged in the high-speed signal area; and A ground shielding sheet is arranged at the bottom of the insulating body and connected with each ground terminal.

[0009] Further, the bottom of the insulating body is further provided with an insulating cover member, and the insulating cover member covers the ground shielding sheet.

[0010] Further, the insulating cover member is provided with a tab extending into the two differential signal terminals at each two differential signal terminals.

[0011] Further, the two sides of the insulating cover member in the width direction are spaced apart in the length direction and provided with slots, and each slot position corresponds to a ground terminal, and the adjacent slots are convex blocks, and the outer side of part of the convex blocks is protruded to form the tab; The two sides of the ground shielding sheet in the width direction are provided with contact arms corresponding to each slot position and contacting the corresponding ground terminals.

[0012] Further, one or two ground terminals are arranged on one side or both sides of each of the differential signal terminals, and the two ground terminals are connected together.

[0013] Further, a metal shell is arranged outside the insulating body, and a wave-absorbing material is arranged between the metal shell and the insulating body.

[0014] Further, a longitudinal recessed groove is arranged on the outer side of the longitudinal side wall, and the wave-absorbing material is arranged in the recessed groove.

[0015] Further, the recessed groove is arranged in the high-speed signal area, the groove wall at one end of the recessed groove in the length direction is flush with the inner side of the end wall of the insertion slot at one end of the fool-proof part, and the groove wall at the other end of the recessed groove in the length direction does not exceed the side surface of the fool-proof part facing the power supply and low-speed signal area.

[0016] Further, a welding foot is arranged at the bottom of the metal shell.

[0017] Further, each of the terminals comprises a fixed part, an elastic arm extending upward from the fixed part, and a welding part extending downward from the fixed part outside the bottom of the insulating body, the elastic arm has a contact part protruding into the insertion slot, and the portions of each two differential signal terminals below the contact part and above the welding part are close to each other, so that the gap between the portions of each two differential signal terminals below the contact part and above the welding part is smaller than the gap between each differential signal terminal and the adjacent remaining terminals.

[0018] Further, each of the insulating blocks and two adjacent differential signal terminals embedded in the insulating block are arranged in the same terminal slot, a partition part is arranged in the terminal slot accommodating the two differential signal terminals, the partition part extends upward to the top surface of the insulating body and downward above the contact part of the differential signal terminal, and the partition part separates a part of the two differential signal terminals.

[0019] Further, the partition part extends upward to the top surface of the insulating body and downward above the contact part of the differential signal terminal, and the partition part separates the portions above the contact part of the two differential signal terminals.

[0020] Further, the upper end of the elastic arm of each of the differential signal terminals is lower than the upper end of the elastic arm of the remaining terminals, the side wall of each terminal slot close to the insertion slot is a pre-pressing wall, the upper end of the elastic arm of each differential signal terminal is below the pre-pressing wall and does not contact the pre-pressing wall, and the end of the elastic arm of the remaining terminals extends upward to form a pre-pressing part, and the pre-pressing part contacts the pre-pressing wall before the electronic module is inserted into the insertion slot.

[0021] Further, the fixing part of the remaining terminals is provided with a clamping point clamped on the groove wall of the terminal groove.

[0022] Further, the insulating block is fixed in the insulating body by laser welding after being inserted into the insulating body.

[0023] Further, the width of the terminal groove accommodating the two differential signal terminals along the slot direction is greater than the sum of the widths of the terminal grooves accommodating any two remaining terminals along the slot direction. The terminal groove accommodating the two differential signal terminals and the adjacent terminal groove accommodating the remaining terminals are separated by a partition wall extending from the top surface of the insulating body to the bottom surface of the insulating body.

[0024] Further, the remaining terminals further include power supply terminals and low-speed signal terminals, and the power supply and low-speed signal areas are provided with the power supply terminals and low-speed signal terminals.

[0025] The beneficial effects of the present application over the prior art mainly include: (1) By embedding two differential signal terminals in one insulating block, no clamping point is designed on the fixing part of the differential signal terminals, and the opposite sides of the two differential signal terminals can be designed closer, so that the two differential signal terminals can be well coupled to reduce signal resonance during signal transmission, ensuring effective signal transmission, and further improving signal transmission stability.

[0026] (2) By connecting the grounding shielding sheet with the grounding terminal, external electromagnetic interference can be introduced into the ground, and internal signals can be prevented from radiating externally, so that the electrical connector has good shielding effect.

[0027] (3) By using the insulating cover provided at the bottom of the insulating body to cover the grounding shielding sheet, the influence of external electromagnetic interference on the internal signals of the electrical connector can be effectively isolated, and the external radiation of the internal signals can be prevented.

[0028] (4) The insulating cover extends into the space between the two differential signal terminals by setting the tab, and the tab is used as a plastic medium between the two differential signal terminals to improve the capacitance and reduce the characteristic impedance.

[0029] (5) By using a metal shell, the interference of external signals can be shielded; by setting the wave-absorbing material, the resonance under high frequency state can be improved, the signal transmission loss can be greatly reduced, the signal integrity performance of the electrical connector can be greatly improved, and the demand for higher transmission rate can be met.

[0030] (6) By setting a recessed groove on the outer side of the longitudinal side wall, the outer side of the terminal can be provided with wave-absorbing material to reduce signal transmission loss and further improve the signal integrity performance of the electrical connector.

[0031] (7) The recessed groove is designed to not exceed the side of the foolproof part facing the power supply and low-speed signal area, which can save the use of wave-absorbing material and reduce the cost.

[0032] (8) The separation part is arranged on the contact part, which prevents the two differential signal terminal heads from being close together and causing short circuit.

[0033] (9) The two differential signal terminals can be designed to be closer to each other to better couple, and the protruding part can be used as a plastic medium between the two differential signal terminals to improve the capacitance of the two differential signal terminals at the position of the protruding part, reduce the characteristic impedance, and effectively improve the transmission efficiency of the connector.

[0034] (10) The head of the differential signal terminal is designed to be shorter than the heads of the other terminals, which can reduce Stub (short stub line or residual stub line) to prevent signal crosstalk and interference and ensure signal integrity.

[0035] (11) The insulation block is fixed in the insulation body by laser welding, which can avoid setting the clamping point on the differential signal terminal to interfere with the insulation body, improve the quality of signal transmission, and the laser welding seam has high precision, high connection strength, and high processing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a perspective exploded view of the high-density ultra-high-speed bus expansion electrical connector of the present application; Figure 2 is a perspective exploded view of the insulation body and the terminal, the insulation covering member and the grounding shielding sheet, wherein the insulation covering member and the grounding shielding sheet are not exploded with the terminal; Figure 3 is a perspective assembly view of Figure 2 ; Figure 4 is a perspective view of Figure 3 combined with the wave-absorbing material; Figure 5 is a perspective view of Figure 2 , wherein the terminal and the insulation body are combined, but the insulation covering member and the grounding shielding sheet are in an exploded state, and one of the insulation blocks and the two differential signal terminals are in an exploded state; Figure 6 is a perspective view of the insulation covering member combined with the grounding shielding sheet in Figure 5 ; Figure 7 is a perspective view of the grounding shielding sheet arranged at the bottom of the insulation body in Figure 5 ; Figure 8 is a perspective view of Figure 5The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body; Figure 9 The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body; Figure 10 The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body; Figure 11 The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body; Figure 12 The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body; Figure 11 The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body; The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body; Figure 13 The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body; The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body; Figure 14 The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body; Figure 13 The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body; The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body; Figure 15 The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body; The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body; Figure 16 The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body; The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body. Figure 17 The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body. The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body.

[0037] The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body. DETAILED DESCRIPTION The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body.

[0038] The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body. The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body.

[0039] The insulating cover and the grounding shielding sheet are combined into one and arranged at the bottom of the insulating body. Figures 1-17As shown, the high-density ultra-high-speed bus extension electric connector comprises an insulating body 1, a plurality of terminals 2 accommodated in the insulating body 1, a plurality of insulating blocks 3, a metal shell 4 covering the insulating body 1, a wave-absorbing material 5 arranged between the metal shell 4 and the insulating body 1, metal feet 6 embedded and fixed at the bottom of both ends of the insulating body 1, a grounding shielding sheet 7 and an insulating covering member 8 arranged at the bottom of the insulating body 1.

[0040] A longitudinal slot 11 is formed in the middle of the top surface of the insulating body 1 by concave down along the longitudinal direction, the slot 11 is used for inserting an electronic module, both sides of the slot 11 have longitudinal side walls 12 arranged along the length direction of the slot 11, and both ends of the slot 11 have end walls 13 closing the slot 11. The longitudinal side walls 12 on both sides of the slot 11 are provided with a plurality of terminal grooves 14, each terminal groove 14 penetrates the bottom surface of the insulating body 1, each terminal groove 14 also penetrates the slot-facing surface of the longitudinal side wall 12, and each terminal groove 14 also penetrates the top surface of the longitudinal side wall 12. The side wall of each terminal groove 14 close to the slot 11 is a pre-pressing wall 15, and the terminal groove 14 penetrating the slot-facing surface of the longitudinal side wall 12 is located below the pre-pressing wall 15. A fool-proof part 16 connecting the two longitudinal side walls 12 is arranged in the slot 11, the fool-proof part 16 separates the slot 11 into a slot one and a slot two shorter than the slot one, and the fool-proof part 16 is used to prevent the electronic module from being inserted reversely. The fool-proof part 16 is used to separate the insulating body 1 into a power and low-speed signal area a and a high-speed signal area b on both sides of the fool-proof part 16.

[0041] The outer side surface of the longitudinal side wall 12 is provided with a longitudinal recessed groove 19, and the wave-absorbing material 5 is located in the recessed groove 19. The recessed groove 19 is located in the high-speed signal area b, the groove wall at one end of the length direction of the recessed groove 19 is flush with the inner side surface of the end wall 13 away from the fool-proof part 16 at one end of the slot 11, and the groove wall at the other end of the length direction of the recessed groove 19 does not exceed the side surface of the fool-proof part 16 facing the power and low-speed signal area a.

[0042] The plurality of terminals 2 comprises differential signal terminals S distributed in the high-speed signal area b and the remaining terminals distributed in the high-speed signal area b and the power and low-speed signal area a. Each two differential signal terminals S are adjacent, and each two adjacent differential signal terminals S are embedded and molded with an insulating block 3 inserted into the insulating body 1. This way of embedding and molding two differential signal terminals S in one insulating block 3 does not need to design a clamping point on the fixed part 21 of the differential signal terminal S, and the opposite sides of the two differential signal terminals S can also be designed closer, so that the two differential signal terminals S can be well coupled, and the signal transmission is more stable. The remaining terminals are all independent terminals inserted into the corresponding terminal grooves 14 of the insulating body 1.

[0043] Each of the insulation blocks 3 and two adjacent differential signal terminals S embeddedly molded with the insulation block 3 are located in the same terminal slot 14, and the insulation block 3 is inserted into the terminal slot 14. The terminal slot 14 accommodating two differential signal terminals S has a large width along the direction of the insertion slot 11, which is a wide slot 141, and the terminal slot 14 accommodating each of the remaining terminals has a small width along the direction of the insertion slot 11, which is a narrow slot 142. The width of the terminal slot 14 (wide slot 141) accommodating two differential signal terminals S along the direction of the insertion slot 11 is greater than the sum of the widths of the terminal slots 14 (narrow slots 142) accommodating any two remaining terminals along the direction of the insertion slot 11. The terminal slot 14 accommodating two differential signal terminals S is separated from the adjacent terminal slot 14 accommodating the remaining terminals by a partition wall 17 extending from the top surface of the insulation body 1 to the bottom surface of the insulation body 1. The terminal slot 14 accommodating two differential signal terminals S has no partition wall 17, but the insulation body 1 is provided with a partition portion 18 at the upper portion of the terminal slot 14 accommodating the two differential signal terminals S. The partition portion 18 extends upward to the top surface of the insulation body 1 and downward above the contact portions 24 of the differential signal terminals S. The partition portion 18 separates the portions above the contact portions 24 of the two differential signal terminals S. The partition portion 18 is provided at a small position above the contact portions 24 to prevent the heads of the two differential signal terminals S from being close to each other and causing short circuit. The portions of the two differential signal terminals S below the partition portion 18 and above the soldering portions of the differential signal terminals S can be designed to be closer to each other for better coupling, thereby effectively improving the transmission efficiency of the connector.

[0044] The remaining terminals include power supply terminals, ground terminals G, and low-speed signal terminals. The power supply terminals and the low-speed signal terminals are provided in the power supply and low-speed signal area a (the positions of the two longitudinal side walls 12 corresponding to the second insertion slots). The high-speed signal area b (the positions of the two longitudinal side walls 12 corresponding to the first insertion slots) is provided with the ground terminals G and other low-speed signal terminals. One or two ground terminals G are provided on one side or both sides of each of the two differential signal terminals S. The two ground terminals G are connected at the fixing portions 21, and thus the resonance between the two pairs of differential signal terminals on both sides of the two ground terminals G is reduced, and the reliability of the high-speed signal transmission of the electrical connector is improved.

[0045] Each of the terminals 2 comprises a fixed portion 21, an elastic arm 22 extending upwardly from the fixed portion 21, and a soldering portion 23 extending downwardly from the fixed portion 21 out of the bottom of the insulating body 1. The elastic arm 22 has a contact portion 24 protruding into the slot 11. Each of the two differential signal terminals S has a portion below the contact portion 24 and above the soldering portion 23, and the two differential signal terminals S are closer to each other at the portion below the contact portion 24 and above the soldering portion 23, so that the gap d1 between the two differential signal terminals S at the portion below the contact portion 24 and above the soldering portion 23 is smaller than the gap d2 between each of the differential signal terminals S and the adjacent remaining terminals (the remaining terminals adjacent to the differential signal terminals S are the ground terminals G). The smaller gap between the two differential signal terminals S at the portion below the contact portion 24 and above the soldering portion 23 allows better coupling between the two differential signal terminals S, so as to reduce signal resonance when the two differential signal terminals S transmit signals, and ensure effective transmission of the signals.

[0046] The upper end of the elastic arm 22 of each of the differential signal terminals S is lower than the upper end of the elastic arm 22 of the remaining terminals (i.e., the head of each of the differential signal terminals S is shorter than the head of the remaining terminals), and the upper end of the elastic arm 22 of each of the differential signal terminals S is below the pre-pressing wall 15 and does not contact the pre-pressing wall 15. The upper end of the elastic arm 22 of the remaining terminals extends upwardly to form a pre-pressing portion 25, which contacts the pre-pressing wall 15 before the electronic module is inserted into the slot 11 and leaves the pre-pressing wall 15 after the electronic module is inserted into the slot 11. By designing the head of each of the differential signal terminals S to be shorter than the head of the remaining terminals, the Stub (short stub line or residual stub line) can be reduced, so as to prevent signal crosstalk and interference and ensure signal integrity.

[0047] The fixed portion 21 of each of the remaining terminals (each of the power terminals, the ground terminals G, and the low-speed signal terminals) is provided with a clamping point 211 clamped to the slot wall of the terminal slot 14. The remaining terminals not only have the pre-pressing portion 25 hanging on the pre-pressing wall 15, but also have the clamping point 211 fixed to the insulating body 1, so as to ensure that the size of the contact portion 24 is more stable.

[0048] The insulating block 3 is inserted into the terminal slot 14 of the insulating body 1 and then fixed to the insulating body 1 by laser welding, so that the clamping point 211 of each of the differential signal terminals S does not interfere with the insulating body 1, the quality of signal transmission is improved, the precision of the laser welding seam is high (micron-level positioning precision can be achieved by laser beam welding), the connection strength is high (the strength of the welding seam can reach the level of the base material), the processing efficiency is high (compared with traditional welding, the speed of laser welding is several times higher, and automatic production is supported), and the laser welding is a non-contact heating method, the range of the heat-affected zone is controllable, and the risk of material deformation is effectively reduced.

[0049] The metal shell 4 covers the power supply and low-speed signal area a and the high-speed signal area b, and is used for shielding the interference of external signals. The top surface of the metal shell 4 is provided with an opening 41 corresponding to the slot 11, and the opening 41 is provided with a connecting portion 42 at the corresponding anti-falling portion 16. The bottom of the metal shell 4 is provided with a soldering leg 43.

[0050] The wave-absorbing material 5 is a rectangular plate body, which is used for improving resonance in a high-frequency state, greatly reducing the loss of signal transmission, greatly improving the signal integrity performance of the electrical connector, and meeting the demand for higher transmission rate.

[0051] The ground shielding sheet 7 is connected with each ground terminal G, and is used for shielding the interference of internal signals of the electrical connector. The ground shielding sheet 7 is covered in the insulating cover 8, and the ground shielding sheet 7 and the insulating cover 8 are embedded and formed. The insulating cover 8 and the ground shielding sheet 7 are both longitudinally long structures, and the insulating cover 8 is fixed to the bottom of the insulating body 1. The insulating cover 8 is provided with a tab 81 extending into the space between every two differential signal terminals S at the position of the two differential signal terminals S. The tab 81 is used as a plastic medium between the two differential signal terminals S to improve the capacitance and reduce the characteristic impedance at this position. The two sides of the insulating cover 8 in the width direction are provided with slots 82 spaced apart in the length direction. Each slot 82 is provided with a ground terminal G at the position. The adjacent slots 82 are provided with a protrusion 83. The outer side of part of the protrusion 83 protrudes to form the tab 81. The two sides of the ground shielding sheet 7 in the width direction are provided with contact arms 71 contacting the corresponding ground terminals G at the positions of the slots 82.

[0052] In other embodiments, the part above the contact portion 24 of the two differential signal terminals S can also be provided with no separation portion 18, and the terminal slot accommodating the two differential signal terminals S penetrates through from the bottom surface of the insulating body to the top surface of the insulating body.

[0053] In other embodiments, the separation portion 18 can be arranged at the position corresponding to the contact portion 24 of the differential signal terminal S, or can be arranged at any position above the fixed portion 21 and below the contact portion 24 of the differential signal terminal S, as long as a small part of the elastic arm 22 of the two differential signal terminals S can be separated. Other positions of the elastic arm 22 of the two differential signal terminals S which are not separated can be designed to be closer to each other to be well coupled, so that the two differential signal terminals can reduce signal resonance when transmitting signals, ensure effective transmission of signals, and further make the signal transmission more stable.

[0054] In other embodiments, the partition 18 extends downward from the top surface of the insulating body 1 to above the insulating block 3, separating the entire elastic arms 22 of the two differential signal terminals S, but the width of the partition 18 along the length direction of the slot 11 is thinner than the width of the partition wall 17 along the length direction of the slot 11, so that the two differential signal terminals S can be designed closer to each other on the opposite sides.

[0055] In other embodiments, the concave groove can also be provided on the top surface of the longitudinal side wall 12, and the wave-absorbing material 5 can also be provided at the concave groove on the top surface.

[0056] The above describes the present application in combination with the best embodiments, but the present application is not limited to the above disclosed embodiments, and should cover various modifications, equivalent combinations according to the essence of the present application.

Claims

1. A high-density, ultra-high-speed bus expansion electrical connector, characterized in that, include: An insulating body has a longitudinally elongated slot recessed from top to bottom for inserting an electronic module. Multiple terminal slots are respectively provided in the longitudinally elongated sidewalls on both sides of the slot. A foolproof part is provided in the slot to divide the insulating body into a power supply and low-speed signal area and a high-speed signal area located on both sides of the foolproof part. Multiple terminals, including differential signal terminals distributed in the high-speed signal area and other terminals distributed in the high-speed signal area and the power supply and low-speed signal areas, wherein every two differential signal terminals are adjacent, and every two adjacent differential signal terminals are embedded in an insulating block inserted into the insulating body. The other terminals are independent terminals inserted into corresponding terminal slots in the insulating body, including grounding terminals located in the high-speed signal area; and A grounding shield is placed at the bottom of the insulating body and is connected to each grounding terminal.

2. The high-density ultra-high-speed bus expansion electrical connector according to claim 1, characterized in that: The bottom of the insulating body is also provided with an insulating cover, which covers the grounding shield inside.

3. The high-density ultra-high-speed bus expansion electrical connector according to claim 2, characterized in that: The insulating cover has a tab extending between each pair of differential signal terminals.

4. The high-density ultra-high-speed bus expansion electrical connector according to claim 3, characterized in that: The insulating cover has slots spaced apart on both sides in the width direction and along the length direction. Each slot has a corresponding grounding terminal. There are protrusions between adjacent slots, and some of the protrusions extend outward to form the protrusions. The grounding shield has contact arms on both sides of the width direction, which are provided at the corresponding slot positions to contact the corresponding grounding terminals.

5. The high-density ultra-high-speed bus expansion electrical connector according to claim 1, characterized in that: One or two grounding terminals are provided on one or both sides of each pair of differential signal terminals, and the two grounding terminals are connected together at the location where there are only two grounding terminals next to the two differential signal terminals.

6. The high-density ultra-high-speed bus expansion electrical connector according to any one of claims 1 to 5, characterized in that: It also includes a metal casing that covers the insulating body, and a wave-absorbing material is disposed between the metal casing and the insulating body.

7. The high-density ultra-high-speed bus expansion electrical connector according to claim 6, characterized in that: The outer surface of the longitudinal sidewall is provided with a longitudinal groove, and the microwave absorbing material is located in the groove.

8. The high-density ultra-high-speed bus expansion electrical connector according to claim 7, characterized in that: The recessed groove is located in the high-speed signal area. The groove wall at one end along the length direction is flush with the inner side of the end wall of the slot away from the foolproof part. The groove wall at the other end along the length direction does not exceed the side of the foolproof part facing the power supply and low-speed signal area.

9. The high-density ultra-high-speed bus expansion electrical connector according to claim 6, characterized in that: The bottom of the metal casing is provided with welding feet.

10. The high-density ultra-high-speed bus expansion electrical connector according to any one of claims 1 to 5, or 7 or 8, characterized in that: Each terminal includes a fixing portion, an elastic arm extending upward from the fixing portion, and a solder portion extending downward from the fixing portion beyond the bottom of the insulating body. The elastic arm has a contact portion protruding into the slot. The portions of each pair of differential signal terminals below the contact portion and above the solder portion abut each other, such that the gap between the portions of each pair of differential signal terminals below the contact portion and above the solder portion is smaller than the gap between each differential signal terminal and the adjacent remaining terminals.

11. The high-density ultra-high-speed bus expansion electrical connector according to claim 10, characterized in that: Each insulating block and two adjacent differential signal terminals embedded in the insulating block are located in the same terminal slot. At the same time, a partition is provided in the terminal slot that houses the two differential signal terminals. The partition extends upward to the top surface of the insulating body and downward to the contact portion above the differential signal terminals. The partition separates a portion of the two differential signal terminals.

12. The high-density ultra-high-speed bus expansion electrical connector according to claim 10, characterized in that: The separator extends upward to the top surface of the insulating body and downward to the contact portion of the differential signal terminal, separating the portions above the contact portions of the two differential signal terminals.

13. The high-density ultra-high-speed bus expansion electrical connector according to claim 10, characterized in that: The upper end of the elastic arm of each differential signal terminal is lower than the upper end of the elastic arm of the other terminals. The side wall of each terminal slot near the slot is a pre-pressure wall. The upper end of the elastic arm of each differential signal terminal is located below the pre-pressure wall and does not contact the pre-pressure wall. The ends of the elastic arms of the other terminals extend upward to form a pre-pressure part. The pre-pressure part contacts the pre-pressure wall before the electronic module is inserted into the slot.

14. The high-density ultra-high-speed bus expansion electrical connector according to claim 10, characterized in that: The fixing part of the remaining terminals is provided with locking points that hold and fix it to the groove wall of the terminal slot.

15. The high-density ultra-high-speed bus expansion electrical connector according to claim 10, characterized in that: The insulating block is inserted into the insulating body and then fixed in the insulating body by laser welding.

16. The high-density ultra-high-speed bus expansion electrical connector according to claim 11, characterized in that: Meanwhile, the width of the terminal slot accommodating the two differential signal terminals along the slot direction is greater than the sum of the widths of the terminal slots accommodating any two other terminals along the slot direction. The terminal slot that houses two differential signal terminals is separated from the adjacent terminal slot that houses the remaining terminals by a partition wall extending from the top surface of the insulating body to the bottom surface of the insulating body.

17. The high-density ultra-high-speed bus expansion electrical connector according to any one of claims 1 to 5, 7 to 9, or 11 to 15, characterized in that: The remaining terminals also include power terminals and low-speed signal terminals, and the power supply and low-speed signal areas are provided with the power terminals and low-speed signal terminals.

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