Ultra-high transmission rate bus expansion connector

Abstract

The utility model provides a kind of bus expansion connector of ultrahigh transmission rate, including an insulating body, with a length slot, multiple terminal slots are respectively arranged in the length side wall of the both sides of slot, an anti-stupid part is arranged in slot, for the insulating body is separated into the power supply and low-speed signal area and high-speed signal area located at the both sides of anti-stupid part;Multiple terminals, including the differential signal terminal distributed in high-speed signal area and the remaining terminal distributed in high-speed signal area and power supply and low-speed signal area, every two differential signal terminals are adjacent, and every two adjacent differential signal terminals are embedded with one insulating block inserted in insulating body Forming, insulating block is hollow at the gap between two differential signal terminals;The remaining terminals are all independent terminals inserted in corresponding terminal slot of insulating body;The bus expansion connector of ultrahigh transmission rate can make signal transmission more good and stable.

Description

Technical Field

[0001] This utility model belongs to the field of connectors, specifically relating to a bus expansion connector with ultra-high transmission rate. Background Technology

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

[0003] The insulating body includes two side walls and a slot extending longitudinally between the two side walls, with the slot extending upwards. The side walls are provided with terminal slots extending downwards, and each terminal is received in its corresponding terminal slot. The side walls are provided with partition walls between adjacent terminal slots, and each terminal slot includes a fixing slot and a receiving slot.

[0004] Two rows of terminals are arranged inside corresponding sidewalls. Each terminal includes a retaining portion fixed in a retaining groove, an elastic portion extending upward from the retaining portion and passing through the receiving groove, and a lead extending out of the insulating body. The elastic portion has a contact portion protruding into the slot, the retaining portion has barbs on both sides that interfere with the sidewall, and the lead is used for soldering to the circuit board. The receiving groove is provided to allow the terminals to be assembled from bottom to top. The terminals include several signal terminals and several ground terminals. The two rows of terminals have roughly the same structure, and the signal terminals and ground terminals also have roughly the same structure. The edge connector also includes an additional slot extending longitudinally and existing independently. A power terminal is installed in the additional slot, and the power terminal has a roughly the same structure as the signal terminals and ground terminals.

[0005] The edge connector further includes an insulating block. The insulating block is filled into the receiving groove where the signal terminal is located, and the insulating block presses against the retaining portion corresponding to the signal terminal. The receiving groove where the ground terminal is located is not filled with an insulating block. By filling the receiving groove where the signal terminal is located with an insulating block, air is isolated, crosstalk between signal terminals is reduced, and the high-frequency performance of the edge connector is improved. The insulating block includes a filling portion located on the lateral outer side and a retaining portion located on the lateral inner side. The filling portion and the retaining portion are spaced apart from each other, and their bottoms are connected as one piece to form a connecting portion. The outer surface of the filling portion presses against the signal terminal, and the retaining portion is fastened to a stepped surface provided on the inner wall of the receiving groove.

[0006] The aforementioned edge-mounted connector can improve crosstalk between signal terminals. However, each signal terminal is located in its own independent terminal slot and is fixed by an insulating block pressing against the holding part of the differential signal terminal. Adjacent signal terminals are separated by a spacer wall that extends upwards from the holding part of the signal terminal to the top of the side wall of the insulating body. This prevents two differential signal terminals from getting closer together, since differential signal terminals need to be close to couple. The two differential signal terminals separated by the spacer wall from top to bottom have poor coupling, which can easily lead to large resonance during signal transmission and cannot ensure effective signal transmission. Therefore, improvements are needed. Utility Model Content

[0007] The purpose of this invention is to provide a bus expansion connector with ultra-high transmission rate to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the technical solution used in this utility model is as follows: A bus expansion connector with ultra-high transmission rate, comprising: 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 area, with each pair of differential signal terminals adjacent to each other, and each pair of adjacent differential signal terminals being embedded in an insulating block inserted into the insulating body, with the insulating block hollowed out in the gap between the two differential signal terminals; the other terminals are all independent terminals inserted into the corresponding terminal slots of the insulating body.

[0009] Furthermore, the insulating block has a through groove that runs through both the top and bottom surfaces of the insulating block between the two differential signal terminals, with the opposite sides of the two differential signal terminals exposed in the through groove.

[0010] Furthermore, the through groove extends beyond the slot-facing surface of the differential signal terminal in the direction of the slot, and the upper and lower parts of the side of the insulating block away from the slot are provided with first recessed grooves. The two first recessed grooves are connected to the through groove, with the upper end of the upper first recessed groove open and the lower end of the lower first recessed groove open.

[0011] Furthermore, the side of the insulating block near the slot is recessed to form a second recessed groove, which extends away from the slot without exceeding the slot-facing surface of the differential signal terminal.

[0012] Furthermore, the top of the two opposite sidewalls of the second recessed groove is recessed to form a step, and the top surface of the step is lower than the bottom wall of the slot.

[0013] Furthermore, the insulating block is inserted into the insulating body and then fixed to the insulating body by laser welding.

[0014] Furthermore, the remaining terminals include grounding terminals disposed in the high-speed signal area; and also include a grounding shield disposed at the bottom of the insulating body and interconnected with each grounding terminal.

[0015] Furthermore, an insulating covering is provided at the bottom of the insulating body, which covers the grounding shield sheet inside.

[0016] Furthermore, the insulating cover is provided with a tab extending between each pair of differential signal terminals.

[0017] Furthermore, the insulating covering has slots spaced apart on both sides along the length direction in the width direction, and a grounding terminal is located at each slot position. There are protrusions between adjacent slots, and the outer side of some of the protrusions protrudes 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.

[0018] Furthermore, 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.

[0019] Furthermore, 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.

[0020] Furthermore, 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.

[0021] Furthermore, the outer surface of the longitudinal sidewall is provided with a longitudinal groove, and the microwave absorbing material is located in the groove.

[0022] Furthermore, the recessed groove is located in the high-speed signal region, and 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 region.

[0023] Furthermore, the bottom of the metal casing is provided with welding feet.

[0024] Furthermore, each of the terminals includes a fixing portion, an elastic arm extending upward from the fixing portion, and a welding 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 welding 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 welding portion is smaller than the gap between each differential signal terminal and the adjacent remaining terminals.

[0025] Furthermore, each of the insulating blocks 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 terminal. The partition separates a portion of the two differential signal terminals.

[0026] Furthermore, the separating portion extends upward to the top surface of the insulating body and downward to above the contact portion of the differential signal terminal, thus separating the portions above the contact portions of the two differential signal terminals.

[0027] Furthermore, 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, and the pre-pressure part contacts the pre-pressure wall before the electronic module is inserted into the slot.

[0028] Furthermore, 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.

[0029] Compared with the prior art, the main advantages of this utility model are reflected in: (1) By embedding two differential signal terminals into an insulating block, there is no need to design a locking point on the fixing part of the differential signal terminals. The opposite sides of the two differential signal terminals can also be designed to be closer together, so that the two differential signal terminals can be well coupled, so that the two differential signal terminals can reduce signal resonance when transmitting signals, ensure effective signal transmission, and thus make the signal transmission better and more stable.

[0030] (2) By setting a cutout, air can be used as a filling medium between the sides of the two differential signal terminals. The dielectric constant of the air medium is 1.0. Compared with using plastic to fill the cutout as a filling medium (the dielectric constant of the plastic medium is between 3.0 and 4.0), the air medium can reduce capacitance and reduce resonance.

[0031] (3) By setting the first recessed groove and the second recessed groove, not only can the weight of the insulating block be reduced, the use of materials be saved, and the cost be reduced, but the first recessed groove can also increase the air between the two differential signal terminals, further reducing resonance.

[0032] (4) By using a grounding shield to connect to the grounding terminal, external electromagnetic interference can be introduced into the ground, while preventing internal signals from radiating outward, thus giving the electrical connector a good shielding effect.

[0033] (5) By using an insulating cover to cover the grounding shield at the bottom of the insulating body, the influence of external electromagnetic interference on the internal signal of the electrical connector can be effectively isolated, and the internal signal can be prevented from radiating outward.

[0034] (6) The insulating cover is provided with a protrusion that extends between the two differential signal terminals. The protrusion is used as a plastic medium between the two differential signal terminals to increase the capacitance and reduce the characteristic impedance.

[0035] (7) By using a metal shell, external signal interference can be shielded; by setting up absorbing materials, resonance in high-frequency states can be improved, signal transmission loss can be greatly reduced, and the signal integrity performance of the electrical connector can be greatly improved, which can meet the needs of higher transmission rates.

[0036] (8) By setting a recessed groove on the outer side of the longitudinal sidewall, the outer side of the terminal can reduce the signal transmission loss through the set wave-absorbing material, thereby further improving the signal integrity performance of the electrical connector.

[0037] (9) Designing the recessed groove to not exceed the side of the anti-foolproof part facing the power supply and low-speed signal area can save the material used for absorbing materials and reduce costs.

[0038] (10) By setting a separator at a small section above the contact portion, the heads of the two differential signal terminals are prevented from coming together and causing a short circuit.

[0039] (11) The two differential signal terminals can bring the longer middle section closer together for better coupling, and the tabs can be used as plastic media between the two differential signal terminals to increase the capacitance of the two differential signal terminals at the tab position, reduce the characteristic impedance, and thus effectively improve the transmission efficiency of the connector.

[0040] (12) By designing the head of the differential signal terminal to be shorter than the heads of the other terminals, the stub (short stake or residual stake) can be reduced to prevent signal crosstalk and interference and ensure signal integrity.

[0041] (13) The insulating block is fixed in the insulating body by laser welding, which eliminates the need to set a blocking point on the differential signal terminal to avoid interference with the insulating body, thus improving the quality of signal transmission. At the same time, the laser welding weld has high precision, high connection strength, and high processing efficiency. Attached Figure Description

[0042] Figure 1 This is an exploded perspective view of the ultra-high transmission rate bus expansion connector of this utility model. Figure 2 This is an exploded perspective view of the insulating body, terminals, insulating covering, and grounding shield. The insulating covering and grounding shield are not separated from the terminals in the figure. Figure 3 for Figure 2 A three-dimensional composite diagram; Figure 4 for Figure 3 A three-dimensional diagram showing the combination with microwave absorbing materials; Figure 5 for Figure 2 The terminal is combined with the insulating body, but the insulating cover and grounding shield are in a decomposed state, as well as a schematic diagram of one insulating block and two differential signal terminals in a decomposed state; Figure 6 for Figure 5 A three-dimensional view of the insulating covering component combined with the grounding shielding sheet; Figure 7 for Figure 5 A three-dimensional view showing the grounding shield being positioned at the bottom of the insulating body; Figure 8 for Figure 5 A three-dimensional view showing the insulating covering and grounding shield integrated into one unit and located at the bottom of the insulating body; Figure 9 for Figure 5 A three-dimensional view showing the insulating block and two differential signal terminals combined in the image; Figure 10 for Figure 9 A three-dimensional view from another angle; Figure 11 for Figure 9 Cross-sectional view; Figure 12 A partial three-dimensional view of the insulating covering and grounding shield combined with the terminal; Figure 13 A partial front view of the insulating sheath and grounding shield combined with the terminals; Figure 14 This is a cross-sectional view at the center of the slot along the length of the insulating body; Figure 15 for Figure 14 A schematic diagram showing the connection with the terminal; Figure 16 This is a cross-sectional view along the length of the slot of the insulating body, near the longitudinal sidewall. Figure 17 for Figure 16 A schematic diagram showing the connection with the terminal; Figure 18 This is a cross-sectional view of the electrical connector at the differential signal terminal. The left side of the figure shows the differential signal terminal, and the right side shows the ground terminal (the right ground terminal in the figure is in the state after the electronic module is inserted into the slot and leaves the pre-compression wall). Figure 19 A three-dimensional view of some grounding terminals and differential signal terminals in the high-speed signal area; Figure 20 This is a front view of some grounding terminals and differential signal terminals in the high-speed signal area.

[0043] Reference numerals: Insulating body 1, slot 11, longitudinal side wall 12, end wall 13, terminal slot 14, wide slot 141, narrow slot 142, pre-compression wall 15, foolproof part 16, partition wall 17, separation part 18, recessed groove 19, terminal 2, fixing part 21, locking point 211, elastic arm 22, welding part 23, contact part 24, pre-compression part 25, insulating block 3, through groove 30, first recessed groove 31, second recessed groove 32, step 33, third recessed groove 34, power supply and low-speed signal area a, high-speed signal area b, metal shell 4, opening 41, connecting part 42, welding foot 43, absorbing material 5, metal foot 6, grounding shield 7, contact arm 71, insulating cover 8, protrusion 81, slot 82, protrusion 83. Detailed Implementation

[0044] To facilitate a better understanding of the purpose, structure, features, and effects of this utility model, the present utility model will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0045] like Figure 1-20 As shown, the ultra-high transmission rate bus expansion connector includes an insulating body 1, multiple terminals 2 and multiple insulating blocks 3 housed within the insulating body 1, a metal shell 4 covering the insulating body 1, a wave-absorbing material 5 disposed 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 shield 7 disposed at the bottom of the insulating body 1, and an insulating cover 8.

[0046] The top surface of the insulating body 1 has a longitudinally recessed slot 11 formed in the middle. The slot 11 is used for inserting an electronic module. Longitudinal sidewalls 12 are arranged along the length of the slot 11 on both sides, and end walls 13 at both ends of the slot 11. Multiple terminal slots 14 are provided on each of the longitudinal sidewalls 12 on both sides of the slot 11. Each terminal slot 14 penetrates the bottom surface of the insulating body 1, penetrates the slot-facing surface of the longitudinal sidewall 12, and also penetrates the top surface of the longitudinal sidewall 12. The sidewall of each terminal slot 14 closest to the slot 11 is a pre-compression wall 15, and the terminal slots 14 penetrating the slot-facing surface of the longitudinal sidewall 12 are located below the pre-compression wall 15. A foolproof part 16 is provided inside the slot 11, connecting the two longitudinal sidewalls 12. The foolproof part 16 divides the slot 11 into a slot one and a slot two shorter than slot one, preventing the electronic module from being inserted in reverse. The foolproof section 16 is used to divide the insulating body 1 into a power supply and low-speed signal area a and a high-speed signal area b located on both sides of the foolproof section 16.

[0047] The outer surface of the longitudinal sidewall 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 region b. The groove wall at one end of the recessed groove 19 along the length direction is flush with the inner surface of the end wall 13 of the slot 11 away from the foolproof part 16. The groove wall at the other end of the recessed groove 19 along the length direction does not exceed the side of the foolproof part 16 facing the power supply and low-speed signal region a.

[0048] The plurality of terminals 2 include differential signal terminals S distributed in the high-speed signal region b and other terminals distributed in the high-speed signal region b and the power supply and low-speed signal region a. Every two differential signal terminals S are adjacent, and every two adjacent differential signal terminals S are embedded in an insulating block 3 inserted into the insulating body 1. This method of embedding two differential signal terminals S into an insulating block 3 eliminates the need for locking points on the fixing part 21 of the differential signal terminals S, allowing the opposite sides of the two differential signal terminals S to be designed closer together, enabling good coupling between the two differential signal terminals S, thereby making signal transmission better and more stable. The remaining terminals are independent terminals inserted into corresponding terminal slots 14 of the insulating body 1.

[0049] Each insulating block 3 and two adjacent differential signal terminals S embedded in the insulating block 3 are located in the same terminal slot 14, and the insulating block 3 is inserted into the terminal slot 14. The terminal slot 14 accommodating two differential signal terminals S has a larger width along the slot 11 direction, which is a wide slot 141. The terminal slot 14 accommodating each of the remaining terminals has a smaller width along the slot 11 direction, which is a narrow slot 142. At the same time, the width of the terminal slot 14 accommodating two differential signal terminals S (wide slot 141) along the slot 11 direction is greater than the sum of the widths of the terminal slots 14 accommodating any two remaining terminals (narrow slots 142) along the slot 11 direction. The terminal slot 14 accommodating two differential signal terminals S is separated from the adjacent terminal slot 14 accommodating the remaining terminals by a spacer wall 17 extending from the top surface of the insulating body 1 to the bottom surface of the insulating body 1. The terminal slot 14, which accommodates two differential signal terminals S, has no partition wall 17. However, the insulating body 1 has a partition 18 at the top of the terminal slot 14. The partition 18 extends upward to the top surface of the insulating body 1 and downward to above the contact portion 24 of the differential signal terminals S. The partition 18 separates the portions above the contact portion 24 of the two differential signal terminals S. By providing the partition 18 at a short distance above the contact portion 24, the heads of the two differential signal terminals S are prevented from touching each other, thus preventing a short circuit. The portions of the two differential signal terminals S below the partition 18 and the portions above the soldered portions of the differential signal terminals S can be designed to be closer together for better coupling, thereby effectively improving the transmission efficiency of the connector.

[0050] The remaining terminals include power terminals, ground terminals G, and low-speed signal terminals. Power terminals and low-speed signal terminals are located in the power supply and low-speed signal area a (the two longitudinal sidewalls 12 at the corresponding slot two positions). The ground terminals G and other low-speed signal terminals are located in the high-speed signal area b (the two longitudinal sidewalls 12 at the corresponding slot one positions). One or two ground terminals G are provided on one or both sides of every two differential signal terminals S. Where there are only two ground terminals G on the sides of two differential signal terminals S, these two ground terminals G are connected together, specifically, the two ground terminals G are connected as one unit at the fixing part 21. This reduces the resonance between the two pairs of differential signal terminals on both sides of the two ground terminals G, improving the reliability of high-speed signal transmission of the electrical connector.

[0051] Each terminal 2 includes a fixing portion 21, an elastic arm 22 extending upward from the fixing portion 21, and a welding portion 23 extending downward from the fixing portion 21 beyond the bottom of the insulating body 1. The elastic arm 22 has a contact portion 24 protruding into the slot 11. The portions of each pair of differential signal terminals S below the contact portion 24 and above the welding portion 23 are brought close together, such that the gap d1 between the portions of each pair of differential signal terminals S below the contact portion 24 and above the welding portion 23 is smaller than the gap d2 between each differential signal terminal S and the adjacent remaining terminals (the remaining terminals adjacent to the differential signal terminal S are ground terminals G). The smaller gap between the portions of two differential signal terminals S below the contact portion 24 and above the welding portion 23 allows for good coupling between the two differential signal terminals S, thereby reducing signal resonance when the two differential signal terminals S transmit signals and ensuring effective signal transmission.

[0052] Multiple holes are provided on the fixing part 21 of the differential signal terminal S. When the insulating block 3 and the differential signal terminal S are integrally formed, plastic is poured into the holes so that the insulating block 3 and the differential signal terminal S are firmly bonded together.

[0053] The upper end of the elastic arm 22 of each differential signal terminal S is lower than the upper end of the elastic arm 22 of the other terminals (i.e., the head of the differential signal terminal S is shorter than the heads of the other terminals). The upper end of the elastic arm 22 of each differential signal terminal S is located below the pre-compression wall 15 and does not contact the pre-compression wall 15. The ends of the elastic arms 22 of the other terminals extend upward to form a pre-compression portion 25. The pre-compression portion 25 contacts the pre-compression wall 15 before the electronic module is inserted into the slot 11 and leaves the pre-compression wall 15 after the electronic module is inserted into the slot 11. By designing the head of the differential signal terminal S to be shorter than the heads of the other terminals, the stub (short stake or residual stake) can be reduced to prevent signal crosstalk and interference and ensure signal integrity.

[0054] The fixing part 21 of the remaining terminals (each power terminal, grounding terminal G, and low-speed signal terminal) is provided with a locking point 211 that is fixed to the groove wall of the terminal slot 14. The remaining terminals not only have a pre-compression part 25 hanging on the pre-compression wall 15, but also have a locking point 211 that is fixed to the insulating body 1, thereby ensuring that the size of the contact part 24 is more stable.

[0055] The insulating block 3 is inserted into the terminal slot 14 of the insulating body 1 and then fixed in the insulating body 1 by laser welding. This eliminates the need to set a jamming point on the differential signal terminal S to prevent interference with the insulating body 1, thus improving the quality of signal transmission. At the same time, laser welding has high weld precision (micron-level positioning accuracy can be achieved by using a laser beam for welding), high connection strength (the weld strength can reach the level of the base material), and high processing efficiency (the laser welding speed is several times higher than that of traditional welding, supporting automated production). Moreover, laser welding is a non-contact heating method, and the heat-affected zone is controllable, effectively reducing the risk of material deformation.

[0056] The insulating block 3 has a hollowed-out section in the gap between the two differential signal terminals S. A through-slot 30, forming a hollowed-out section, is provided between the two differential signal terminals S, penetrating both the top and bottom surfaces of the insulating block 3. The opposite sides (the sides closer to each other) of the two differential signal terminals S are exposed in the through-slot 30. This hollowed-out design allows air to fill the hollowed-out section as a medium. The dielectric constant of the air medium is 1.0, which, compared to using plastic to fill the hollowed-out section (the dielectric constant of plastic is between 3.0 and 4.0), reduces capacitance and resonance. The through-slot 30 extends beyond the slot-facing surface of the differential signal terminals S towards the slot. The upper and lower parts of the side of the insulating block 3 away from the slot 11 are provided with first recessed grooves 31. Both first recessed grooves 31 communicate with the through-slot 30. The upper end of the upper first recessed groove 31 is open, and the lower end of the lower first recessed groove 31 is open.

[0057] The insulating block 3 has a recessed side near the slot 11 forming a second recessed groove 32. The second recessed groove 32 faces opposite to the first recessed groove 31. The second recessed groove 32 extends away from the slot 11 but does not exceed the slot-facing surface of the differential signal terminal S. The second recessed groove 32 reduces the weight of the insulating block 3 and saves material. The second recessed groove 32 communicates with the through groove 30. The top of the two opposite sidewalls of the second recessed groove 32 is recessed to form a step 33. The top surface of the step 33 is lower than the bottom wall of the slot 11 to avoid interfering with the smooth insertion of the electronic module into the slot 11. The two sides of the insulating block 3 perpendicular to the length direction of the slot 11 also have third recessed grooves 34. The third recessed grooves 34 also reduce the weight of the insulating block 3. The side of the two differential signal terminals S that is far apart from each other is exposed in the third recessed groove 34.

[0058] The metal casing 4 covers the power supply and low-speed signal area a and the high-speed signal area b to shield against external signal interference. The top surface of the metal casing 4 has an opening 41 corresponding to the slot 11, and the opening 41 has a connecting part 42 at the corresponding anti-fooling part 16. The bottom of the metal casing 4 has a welding foot 43.

[0059] The absorbing material 5 is a rectangular plate used to improve resonance at high frequencies, greatly reduce signal transmission loss, and significantly improve the signal integrity performance of the electrical connector, thus meeting the requirements of higher transmission rates.

[0060] The grounding shield 7 is interconnected with each grounding terminal G to shield the internal signal interference of the electrical connector. The insulating cover 8 encloses the grounding shield 7, and the grounding shield 7 and the insulating cover 8 are embedded and formed. Both the insulating cover 8 and the grounding shield 7 are longitudinally elongated structures. The insulating cover 8 is fixed to the bottom of the insulating body 1. The insulating cover 8 has a protrusion 81 extending between each pair of differential signal terminals S. The protrusion 81 serves as a plastic medium between the two differential signal terminals S to increase the capacitance and reduce the characteristic impedance. The insulating cover 8 has slots 82 spaced along its length on both sides in the width direction. Each slot 82 corresponds to a grounding terminal G. Between adjacent slots 82 are protrusions 83, and the outer side of some of the protrusions 83 protrudes to form the protrusion 81. The grounding shield 7 has contact arms 71 on both sides in the width direction corresponding to each slot 82, which contact the corresponding grounding terminal G. The grounding shield 7 has multiple holes. When the insulating cover 8 is integrally formed with the grounding shield 7, plastic is poured into the holes so that the grounding shield 7 and the insulating cover 8 are firmly bonded together.

[0061] In other embodiments, the portion above the contact portion 24 of the two differential signal terminals S may also be without the partition portion 18, and the terminal slot accommodating the two differential signal terminals S extends from the bottom surface of the insulating body to the top surface of the insulating body.

[0062] In other embodiments, the separator 18 can be located at the contact portion 24 of the corresponding differential signal terminal S, or it can be located at any position below the contact portion 24 of the corresponding differential signal terminal S and above the fixing portion 21, as long as it can separate a small portion of the elastic arms 22 of the two differential signal terminals S. Other positions where the elastic arms 22 of the two differential signal terminals S are not separated can be designed to be closer together for good coupling, so as to reduce signal resonance when the two differential signal terminals transmit signals, ensure effective signal transmission, and thus make the signal transmission better and more stable.

[0063] In other embodiments, the separator 18 extends downward from the top surface of the insulating body 1 to the top of the insulating block 3, separating the entire elastic arm 22 of the two differential signal terminals S. However, the width of the separator 18 along the length of the slot 11 is thinner than the width of the partition wall 17 along the length of the slot 11, which also allows the two differential signal terminals S to be designed to be closer to each other.

[0064] In other embodiments, a recessed groove may also be provided on the top surface of the longitudinal sidewall 12, and a wave-absorbing material 5 may also be provided in the recessed groove on the top surface.

[0065] The present invention has been described above in conjunction with the preferred embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations made in accordance with the essence of the present invention.

Claims

1. An ultra-high transfer rate bus expansion connector, comprising: 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 area, with each pair of differential signal terminals adjacent to each other, and each pair of adjacent differential signal terminals being embedded in an insulating block inserted into the insulating body, with the insulating block hollowed out in the gap between the two differential signal terminals; the other terminals are all independent terminals inserted into the corresponding terminal slots of the insulating body.

2. The ultra-high transfer rate bus expansion connector of claim 1, wherein: The insulating block has a through slot that runs through both the top and bottom surfaces of the insulating block between the two differential signal terminals, with the opposite sides of the two differential signal terminals exposed in the through slot.

3. The ultra-high transfer rate bus expansion connector of claim 2, wherein: The through slot extends beyond the slot-facing surface of the differential signal terminal in the direction of the slot. The upper and lower parts of the side of the insulating block away from the slot are provided with first recessed grooves. The two first recessed grooves are connected to the through slot. The upper end of the upper first recessed groove is open, and the lower end of the lower first recessed groove is open.

4. The ultra-high transfer rate bus expansion connector of claim 2, wherein: The insulating block has a recessed side near the slot to form a second recessed groove, which extends away from the slot without exceeding the slot-facing surface of the differential signal terminal.

5. The ultra-high transfer rate bus expansion connector of claim 4, wherein: The top of the two opposite sidewalls of the second recessed groove is recessed to form a step, and the top surface of the step is lower than the bottom wall of the groove.

6. The ultra-high transfer rate bus expansion connector of claim 1, wherein: The insulating block is inserted into the insulating body and then fixed in the insulating body by laser welding.

7. The ultra-high transfer rate bus expansion connector of any of claims 1 to 6, wherein: The remaining terminals include grounding terminals located in the high-speed signal area; and a grounding shield located at the bottom of the insulating body and interconnected with each grounding terminal.

8. The ultra-high transfer rate bus expansion connector of claim 7, wherein: The bottom of the insulating body is also provided with an insulating cover, which covers the grounding shield inside.

9. The ultra-high transfer rate bus expansion connector of claim 8, wherein: The insulating cover has a tab extending between each pair of differential signal terminals.

10. The ultra-high transfer rate bus expansion connector of claim 9, wherein: 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.

11. The ultra-high transfer rate bus expansion connector of claim 7, wherein: 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.

12. The ultra-high transfer rate bus expansion connector of claim 7, wherein: 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.

13. The ultra-high transfer rate bus expansion connector of any one of claims 1 to 6 or any one of claims 8 to 12, wherein: 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.

14. The ultra-high transfer rate bus expansion connector of claim 13, wherein: The outer surface of the longitudinal sidewall is provided with a longitudinal groove, and the microwave absorbing material is located in the groove.

15. The ultra-high transmission rate bus expansion connector according to claim 14, characterized in that: The recessed groove is located in a high-speed signal area, and a groove wall at one end of the recessed groove in the length direction is flush with an inner side surface of an end wall at one end of the insertion slot away from the fool-proof part, and a groove wall at the other end of the recessed groove in the length direction does not exceed a side surface of the fool-proof part facing the power supply and low-speed signal area.

16. The ultra-high transfer rate bus expansion connector of claim 13, wherein: The bottom of the metal shell is provided with a welding foot.

17. The ultra-high transfer rate bus expansion connector of any one of claims 1 to 6 or any one of claims 8 to 12 or any one of claims 14 to 16, wherein: Each of the terminals comprises a fixed part, an elastic arm extending upward from the fixed part, and a welding part extending out of 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.

18. The ultra-high transfer rate bus expansion connector of claim 17, wherein: Each of the insulating blocks and two adjacent differential signal terminals embedded in the insulating block are located in the same terminal slot, and 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.

19. The ultra-high transfer rate bus expansion connector of claim 18, wherein: 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.

20. The ultra-high transfer rate bus expansion connector of claim 17, wherein: 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 located below the pre-pressing wall and does not contact the pre-pressing wall, the upper 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.

21. The ultra-high transfer rate bus expansion connector of claim 17, wherein: The fixed part of the remaining terminals is provided with a clamping point clamped to the groove wall of the terminal slot.

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