Electric connector

Abstract

The utility model discloses an electric connector, which comprises an insulating shell, a plurality of conductive terminals, a plurality of metal sheets and a plug piece, the metal sheets are insulated and separated from grounding terminals in the conductive terminals, and shielding parts of the metal sheets protrude out of a main body part in the left-right direction; the two adjacent shielding parts in the two metal sheets are respectively used for partially shielding the middle sections of the two adjacent signal terminals, and meanwhile, the height of the shielding parts in the vertical direction is smaller than that of the main body part in the vertical direction, so that capacitive coupling at the positions of the signal terminals is increased, the difference value between the capacitive coupling and inductive coupling is reduced, and the coupling efficiency is improved. And meanwhile, the conductive part of the plug piece is electrically conducted with the grounding terminal to form a grounding loop, so that the shielding effect is optimized, the resonance is reduced, and the integrity of signal transmission is improved.

Description

[Technical Field]

[0001] This utility model relates to an electrical connector, and more particularly to an electrical connector that reduces far-end crosstalk to improve signal integrity. [Background Technology]

[0002] When multiple terminals in an electrical connector transmit data, they form multiple signal lines. When at least one of these adjacent signal lines is active, harmful electromagnetic coupling (i.e., crosstalk) from adjacent attackers occurs throughout the data transmission path. Crosstalk caused when the attacker's transmitter and the victim's receiver are physically close to each other is called near-end crosstalk (NEXT), and crosstalk caused when they are physically far apart is called far-end crosstalk (FEXT). Generally, the impact of near-end crosstalk is greater than that of far-end crosstalk. Therefore, most connectors typically consider how to reduce near-end crosstalk. For example, they may use grounding shields to connect the grounding terminals in the electrical connector together to shield against electromagnetic interference between adjacent signal lines, or they may use conductive plastic to absorb noise scattered between adjacent signal lines. However, on signal lines between two closely spaced transmitters or receivers, the distortion caused by far-end crosstalk during high-frequency connector signal transmission needs to be considered.

[0003] Therefore, it is necessary to provide an electrical connector that reduces far-end crosstalk to improve signal integrity in order to overcome the above-mentioned defects. [Utility Model Content]

[0004] In view of the problems in the background technology, the purpose of this utility model is to provide an electrical connector that reduces remote crosstalk to improve signal integrity.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: an electrical connector for mating with a plug-in, comprising: an insulating shell having a slot, a mounting slot, and a plurality of receiving slots, the slot extending in a left-right direction and communicating with the mounting slot in a vertical direction, the slot for receiving the plug-in, the plurality of receiving slots being disposed on at least one side of the slot in a front-back direction and communicating with the slot and the mounting slot; a plurality of conductive terminals, mounted to the plurality of receiving slots through the mounting slot, including signal terminals and grounding terminals disposed on one side of the signal terminals, each conductive terminal including a middle section and a contact portion and a tail portion located at both ends of the middle section, the contact portion being exposed in the slot, and the tail portion being exposed outside the insulating shell; a plurality of metal... Metal sheets are spaced apart in the insulating housing in the left-right direction. The metal sheets are insulated from the grounding terminals in the front-back direction. Each metal sheet has a main body and a shielding portion extending from at least one side of the main body in the left-right direction. The main body extends in the vertical direction and is disposed corresponding to the middle section of the grounding terminal. Each shielding portion shields the middle section of one signal terminal. The height of the shielding portion in the vertical direction is less than the height of the main body in the vertical direction. A plug is received in the mounting groove and includes a fixing base and a plurality of conductive portions extending toward the plurality of grounding terminals relative to the fixing base. The conductive portions and the metal sheets are respectively disposed opposite to each other on the front and back sides of the grounding terminals, and the conductive portions are electrically connected to the corresponding grounding terminals.

[0006] Furthermore, the two signal terminals located between two adjacent grounding terminals form a differential signal pair. The two adjacent shielding portions of the two adjacent metal sheets are used to partially shield the middle section of the two signal terminals in the differential signal pair, and the distance between the two adjacent shielding portions is not greater than the distance between the contact portions of the two signal terminals in the differential signal pair.

[0007] Furthermore, the shielding portion is provided on both the left and right sides of the main body, and the width of the main body in the left-right direction is smaller than the width of the shielding portion extending in the left-right direction.

[0008] Furthermore, the intermediate section includes a fixing part and an elastic part located between the contact part and the fixing part. The fixing part is embedded in a plastic part, and the elastic part and the tail part both extend out of the plastic part. The distance between the two elastic parts of a pair of signal terminals in the left-right direction is less than the distance between the two fixing parts in the left-right direction. The shielding part extends from the top of the main body in the left-right direction. The shielding part is located on the side of the fixing part close to the elastic part, and the projection of the shielding part in the front-back direction only partially overlaps with the fixing part of the signal terminal.

[0009] Furthermore, the multiple conductive terminals and the multiple metal sheets are embedded in a plastic part and assembled together with it to the insulating shell. The conductive terminals and the metal sheets are separated by the wall thickness gap of the plastic part. The plastic part is provided with a through hole that exposes the grounding terminal. The conductive part extends into the through hole and contacts the grounding terminal.

[0010] Furthermore, the plastic part has multiple through windows on the side away from the plug along the left-right direction, and the multiple windows expose the side of the multiple metal sheets away from the conductive terminals.

[0011] Furthermore, the conductive terminals are arranged in two rows, the plug is disposed between the two rows of conductive terminals, and multiple metal plates are disposed on the outside of the two rows of conductive terminals; the electrical connector also includes a grounding component disposed between the plastic part and the fixing base, the grounding component includes a plate, a shielding part protruding from the upper end of the plate and a solder foot protruding from the lower end of the plate, multiple solder feet are exposed outside the insulating shell and are disposed one-to-one with the tails of multiple grounding terminals, the shielding part is higher than the plug and the plastic part in the vertical direction, the shielding part is used to shield the middle section of the corresponding signal terminal in the front-back direction, the shielding part and the shielding part are respectively disposed opposite to each other on the front and back sides of the signal terminal, and each shielding part is located between two adjacent conductive parts and electrically connected to them.

[0012] Furthermore, the plastic part is provided with a retaining post extending in the front-to-back direction, and the fixing seat is provided with a retaining hole corresponding to the retaining post. The retaining hole is located below the conductive part, and the plastic part is secured in the retaining hole in the front-to-back direction through the retaining post. The plate is provided with a through hole in the front-to-back direction, and the grounding member is sleeved on the retaining post through the through hole and clamped between the plastic part and the fixing seat.

[0013] Furthermore, the gap between the metal sheet and the corresponding grounding terminal in the front-to-back direction ranges from 0.2mm to 0.4mm.

[0014] This utility model also discloses an electrical connector for mating with a plug-in, comprising: an insulating shell having a slot, a mounting slot, and a plurality of receiving slots, the slot extending in a left-right direction and communicating with the mounting slot, the slot for receiving the plug-in, the plurality of receiving slots being disposed on at least one side of the slot in a front-back direction and communicating with the slot and the mounting slot; a plurality of conductive terminals mounted to the plurality of receiving slots through the mounting slot, including signal terminals and grounding terminals disposed on one side of the signal terminals, each conductive terminal including a middle section and a contact portion and a tail portion located at both ends of the middle section, the contact portion being exposed in the slot, and the tail portion being exposed in the insulating shell; a plurality of metal plates spaced apart in a left-right direction on the insulating shell, the metal plates being insulated from the grounding terminals in a front-back direction, each metal plate having a main body and a shielding portion extending from at least one side of the main body in the left-right direction, the main body extending in a vertical direction and corresponding to the middle section of the grounding terminal, with adjacent metal plates having a shielding portion extending from at least one side of the main body in the left-right direction, the main body extending in a vertical direction and corresponding to the middle section of the grounding terminal, the middle section of adjacent metal plates being shielded from the grounding terminals. Two adjacent shielding portions are used to shield the middle sections of two adjacent signal terminals, and the height of the shielding portions in the vertical direction is less than the height of the main body in the vertical direction; a plug is received in the mounting groove, including a fixing base and a plurality of conductive portions extending toward the conductive terminal relative to the fixing base, the conductive portions and the metal sheet are respectively disposed opposite to each other on the front and rear sides of the grounding terminal, and the conductive portions are electrically connected to the corresponding grounding terminals; a grounding member is located between the conductive terminal and the fixing base, including a plate, a shielding portion protruding from the upper end of the plate and a solder foot protruding from the lower end of the plate, the plurality of solder feet are exposed outside the insulating shell and are disposed one-to-one with the tails of the plurality of grounding terminals, the height of the shielding portion in the vertical direction is higher than that of the plug, the shielding portion is used to shield the middle section of the signal terminal in the front and rear direction, the shielding portion and the shielding portion are respectively disposed opposite to each other on the front and rear sides of the signal terminal, and each shielding portion is located between and electrically connected to two adjacent conductive portions.

[0015] The beneficial effects of this utility model are as follows: This utility model separates the metal sheet from the grounding terminal by insulation. The main body of the metal sheet is set corresponding to the middle section of the grounding terminal. At the same time, the height of the shielding part in the vertical direction is less than the height of the main body in the vertical direction. The two adjacent shielding parts of two adjacent metal sheets are used to shield the middle sections of two adjacent signal terminals, according to the formula: The magnitude of far-end crosstalk is related to the difference between capacitive coupling and inductive coupling. Increasing capacitive coupling is actually using more capacitive coupling to cancel inductive coupling. This setting not only reduces far-end crosstalk, but also makes the conductive part electrically connected to the ground terminal to form a grounding loop, which optimizes the shielding effect, reduces resonance, and improves the integrity of signal transmission. [Attached Image Description]

[0016] Figure 1 This is an exploded view of the electrical connector of this utility model along the vertical direction with respect to the electronic card and circuit board;

[0017] Figure 2 for Figure 1 Exploded view of CEC connectors;

[0018] Figure 3 for Figure 2 The diagram only shows an exploded view of the terminal module, plug, and grounding component;

[0019] Figure 4 for Figure 2 The diagram only shows the assembly of the terminal module, plug, and grounding component;

[0020] Figure 5 for Figure 4 From another perspective, only the combination diagram of the terminal module, plug and grounding component is shown;

[0021] Figure 6 This is an exploded view of a terminal module;

[0022] Figure 7 for Figure 2 The image shows only a partial side view of the terminal module, plug, and grounding component.

[0023] Figure 8 for Figure 6 The terminal module in the middle section only shows a partial side view of the metal sheet and conductive terminals;

[0024] Figure 9 for Figure 2 The image shows only a partial top view of the terminal module, plug, and grounding component;

[0025] Figure 10 for Figure 7 A cross-sectional view along section line AA;

[0026] Figure 11 for Figure 7 A cross-sectional view along the BB section line;

[0027] Figure 12 for Figure 11 A magnified view of a section at point C;

[0028] Figure 13 Near-end crosstalk analysis diagram for the electrical connector of this utility model with conductive plastic and T-shaped metal strip;

[0029] Figure 14 A diagram showing the far-end crosstalk analysis of the electrical connector of this utility model with conductive plastic and T-shaped metal strip;

[0030] Figure 15 Near-end crosstalk analysis diagram for electrical connectors with only T-shaped metal tabs;

[0031] Figure 16 Analysis diagram of far-end crosstalk for electrical connectors with only T-shaped metal tabs.

[0032] Explanation of icon numbers:

[0033] Electrical connector 100 Insulating shell 1 Slot 11 Mounting slot 12 Side wall 13 Containment Slot 14 Conductive terminal 2 Signal terminal 2S Grounding terminal 2G Middle section 21 Fixing part 211 Elastic part 212 Contact Section 22 Tail 23 Metal sheet 3 Main body 31 Shielding part 32 Plastic Part 4 Covering part 41 Through hole 411 Window 412 Notch 413 Embedded post 42 Plug 5 Fixture 51 511 Embedded Card Hole Conductive plastic 52 Conductive part 521 Grounding component 6 Plate 61 611 piercing Shielding part 62 Solder foot 63 Electronic card 200 Circuit board 300

Detailed Implementation Methods

[0034] 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.

[0035] In this utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0036] like Figure 1 As shown, the electrical connector 100 of this utility model is used for electrical connection with the plug-in and the circuit board 300, respectively. That is, the circuit board 300 is electrically connected to the plug-in through the electrical connector 100 to transmit electrical signals from the circuit board 300 to the electrical connector 100, and then to the plug-in. The electrical connector 100 is located above the circuit board 300, and the plug-in is inserted downwards into the electrical connector 100. Specifically, in this embodiment, the electrical connector 100 is specifically an MCIO 7.0 slot connector, and the plug-in is specifically an electronic card 200. Of course, in other embodiments, it can also be other electrical connectors such as PCIE 7.0, and the plug-in can also be a mating connector, which is not limited here.

[0037] like Figure 2 and Figure 3As shown, the electrical connector 100 includes an insulating shell 1 and a terminal module, a plug 5, and a grounding component 6 disposed within the insulating shell 1. Specifically, there are two terminal modules, the plug 5 is disposed between the two terminal modules, and there are also two grounding components 6. The two grounding components 6 are respectively sandwiched between a terminal module and a plug 5. The terminal module is first assembled with the grounding component 6 and then with the plug 5, and then installed together into the insulating shell 1. It can be understood that in other embodiments, only one terminal module and only one grounding component 6 may be provided, that is, the plug 5 is disposed on one side of the terminal module.

[0038] like Figure 2 As shown, the insulating housing 1 is made of insulating material and has a slot 11, a mounting groove 12, and a plurality of receiving grooves 14. The slot 11 extends in the left-right direction and communicates with the mounting groove 12 in the up-down direction. The slot 11 is used to receive a connector. Specifically, the slot 11 and the mounting groove 12 are arranged opposite each other in the up-down direction. The slot 11 extends upward through the insulating housing 1, and the mounting groove 12 also extends in the left-right direction and extends downward through the insulating housing 1. The plurality of receiving grooves 14 are provided on at least one side of the slot 11 in the front-back direction and communicate with the slot 11 and the mounting groove 12. Specifically, the receiving grooves 14 are provided on the side walls 13 on the front and back sides of the insulating housing 1 and communicate with the slot 11 and the mounting groove 12 in the front-back direction.

[0039] like Figure 2 , Figure 11 and Figure 12 As shown, the terminal module is assembled from the mounting groove 12 to the insulating shell 1. Each terminal module includes multiple conductive terminals 2, multiple metal pieces 3 and a plastic part 4. The multiple conductive terminals 2 are arranged at intervals in the left and right direction and are housed in multiple receiving grooves 14 in a corresponding manner. The multiple metal pieces 3 are also arranged at intervals in the left and right direction. The conductive terminals 2 and the multiple metal pieces 3 are embedded in the plastic part 4 and assembled together to the insulating shell 1.

[0040] like Figure 8As shown, the multiple conductive terminals 2 include signal terminals 2S and ground terminals 2G disposed on one side of the signal terminals 2S. Specifically, the signal terminals 2S are arranged in pairs, and two signal terminals 2S located between two adjacent ground terminals 2G form a differential signal pair for transmitting differential signals. Since differential signals have better immunity to common-mode interference and their signal paths are symmetrical, signal integrity can be better guaranteed, and signal attenuation and distortion can be reduced. In other embodiments, the signal terminals 2S can also be arranged individually, that is, only one signal terminal 2S is provided between two ground terminals 2G, using single-channel signal transmission. This is not specifically limited here. Specifically, the ground terminals 2G and the metal sheet 3 are separated by the wall thickness gap of the plastic part 4, that is, the metal sheet 3 does not form a circuit loop with the ground terminals 2G. In other embodiments, the electrical connector 100 may also omit the plastic part 4. In this case, the conductive terminal 2 can be directly inserted into the receiving groove 14, and multiple metal pieces 3 are assembled in the front and rear side walls 13 of the insulating shell 1. That is, the metal pieces 3 and the grounding terminal 2G are insulated and separated by the wall thickness of the insulating shell 1.

[0041] like Figure 12 As shown, the gap W1 between the metal piece 3 and the grounding terminal 2G along the front-to-back direction ranges from 0.2mm to 0.4mm. Within this gap W1 range, the far-end crosstalk of the electrical connector 100 of this utility model is significantly improved. When the gap W1 range is less than 0.2mm, the metal piece 3 is easily electrically coupled to the grounding terminal 2G, which results in the metal piece 3 and the grounding terminal 2G sharing the same ground and failing to improve the far-end crosstalk. When the gap W1 range is greater than 0.4mm, due to the small size of the metal piece 3, the increase in capacitive coupling will be affected when the distance is large. That is, the increase in capacitive coupling will be reduced compared to when the gap W1 range is 0.2mm-0.4mm, thus the effect of improving the far-end crosstalk becomes worse.

[0042] like Figure 1 , Figure 7 and Figure 8As shown, each conductive terminal 2 is provided with an intermediate section 21 and a contact portion 22 and a tail portion 23 located at both ends of the intermediate section 21. The contact portion 22 is exposed in the slot 11 in the front-back direction for electrical connection with the mating part inserted into the slot 11. The tail portion 23 is exposed outside the insulating shell 1. The tail portion 23 is soldered to the circuit board 300 by surface mount technology (SMT) to electrically connect to the circuit board 300. In other embodiments, the tail portion 23 can also be inserted into the circuit board 300 to electrically connect to the circuit board 300, which is not specifically limited here. The intermediate section 21 includes a fixed part 211 and an elastic part 212. The elastic part 212 is located between the contact part 22 and the fixed part 211. The fixed part 211 is embedded in the plastic part 4. The elastic part 212 and the tail part 23 both extend out of the plastic part 4. Specifically, in a pair of signal terminals 2S, the distance between the two elastic parts 212 in the left-right direction is smaller than the distance between the two fixed parts 211 in the left-right direction. That is, the two elastic parts 212 of the two signal terminals 2S are close to each other, and the signal terminals 2S are tightly coupled. This helps to reduce crosstalk during signal transmission.

[0043] like Figure 7 and Figure 8 As shown, each metal sheet 3 includes a main body 31 and a shielding portion 32 extending from at least one side of the main body 31 in the left-right direction. The height of the shielding portion 32 in the vertical direction is less than the height of the main body 31 in the vertical direction. It can be understood that the metal sheet 3 may have one shielding portion 32 or two shielding portions 32. Specifically, in this embodiment, the shielding portion 32 extends from the top of the main body 31 in the left-right direction. The shielding portion 32 is located on the side of the fixing portion 211 near the elastic portion 212. Specifically, it is located near the middle of the plastic part. The metal sheet 3 has two shielding portions 32, which are in the shape of a "T". The metal sheet 3 located at the left and right ends of the plastic part has only one shielding portion 32, which is in the shape of an "L". It can be understood that the setting of the shielding portion 32 depends on the arrangement of the conductive terminals 2. The metal sheet can also be set in other shapes such as a "+" shape or a "Y" shape, as long as the shielding portion 32 protrudes on the left and right sides of the main body 31 and the height of the shielding portion 32 in the vertical direction is less than the height of the main body 31 in the vertical direction. There is no limitation here, and it can be selected according to the actual situation.

[0044] like Figure 8 , Figure 11 and Figure 12As shown, the main body 31 extends in the vertical direction and is provided corresponding to the middle section 21 of the grounding terminal 2G. Each shielding part 32 shields the middle section 21 of one signal terminal 2S. The distance W2 between two adjacent shielding parts 32 is not greater than the distance W3 between the contact parts 22 of the two signal terminals 2S in the differential signal pair. Specifically, the main body 31 is provided corresponding to the fixing part 211 of the grounding terminal 2G, and the shielding part 32 is provided corresponding to the fixing part 211 of the signal terminal 2S. The projection of the shielding part 32 in the front-back direction only partially overlaps with the fixing part 211 of the signal terminal 2S. That is, the shielding part 32 only partially shields the fixing part 211 of the corresponding signal terminal 2S. This will not affect the tight coupling of the elastic part 212 of the signal terminal 2S. Two adjacent shielding portions 32 of the two metal plates 3 are used to shield the middle section 21 of an adjacent pair of signal terminals 2S. That is, in two adjacent signal terminals 2S, the fixing portion 211 of one signal terminal 2S is partially shielded by the shielding portion 32 of one metal plate 3, and the fixing portion 211 of the other signal terminal 2S is partially shielded by the shielding portion 32 of the other metal plate 3. In other words, the two metal plates 3 jointly shield a pair of signal terminals 2S. Compared with the prior art where one metal plate 3 shields multiple pairs of signal terminals 2S, the overlapping portion between the shielding portion 32 and the corresponding signal terminal 2S is larger, which leads to an excessive increase in capacitive coupling at the signal terminal 2S, resulting in a poor improvement in far-end crosstalk. In contrast, the arrangement of this utility model has less overlap between the shielding portion 32 and the corresponding signal terminal 2S, allowing for more precise adjustment of the capacitive coupling increment, thus greatly improving the far-end crosstalk of the electrical connector 100.

[0045] like Figure 4 , Figure 5 and Figure 6 As shown, the plastic part 4 is made of insulating material. The plastic part 4 includes a covering part 41 and a retaining post 42 extending from the covering part 41 in the front-back direction toward the slot 11. The covering part 41 covers the fixing part 211 of a row of conductive terminals 2 and a plurality of metal pieces 3. The wall thickness of the covering part 41 insulates and separates the plurality of metal pieces 3 from the plurality of conductive terminals 2. The retaining post 42 protrudes from the side of the covering part 41 near the plug 5. A plurality of retaining posts 42 are arranged at intervals in the left-right direction. The retaining posts 42 are used to fix the terminal module to the plug 5.

[0046] like Figure 3 and Figure 6 and Figure 12As shown, the covering part 41 includes multiple through holes 411, multiple notches 413 and multiple windows 412. The multiple through holes 411 penetrate the side of the covering part 41 near the plug 5 in the front-back direction. Specifically, the multiple through holes 411 expose the side of the multiple grounding terminals 2G near the slot 11 in a one-to-one correspondence. Each notch 413 corresponds to two adjacent signal terminals 2S, that is, a pair of differential signal pairs are set, and also passes through the cover part 41 near the slot 11 in the front-back direction. Specifically, the notch 413 and the through hole 411 are spaced apart and staggered in the left-right direction. Multiple windows 412 are set for multiple metal pieces 3. The windows 412 are located on the side of the plastic part 4 away from the plug 5. The windows 412 expose the side of the metal piece 3 away from the slot 11. The windows 412 are beneficial to the positioning of the metal piece 3 during injection molding, that is, multiple metal pieces 3 are injected into the plastic part 4 at one time, so that the gap W1 between the multiple metal pieces 3 and the multiple ground terminals 2G is fixed, thus improving the adjustment effect of far-end crosstalk.

[0047] like Figure 2 , Figure 3 and Figure 9 As shown, the plug 5 includes a fixing base 51 and a conductive plastic 52 disposed on the fixing base 51. The fixing base 51 is made of insulating material, and the conductive plastic 52 is conductive and is embedded in the upper part of the fixing base 51. The fixing part 211 includes a plurality of locking holes 511 extending in the front-back direction. The locking holes 511 are located below the conductive plastic 52 and are used to be engaged by the locking posts 42 of the plastic part 4, thereby fixing the terminal module to the plug. Specifically, the locking posts 42 can be configured in various ways. They can be configured as having hooks, or as being columnar with ribs. Of course, a combination of multiple configurations is also possible. No specific limitation is made here, as long as it can be secured.

[0048] like Figure 2 and Figure 5 As shown, the conductive plastic 52 is used to absorb noise between signal terminals 2S, which can improve resonance during signal transmission. Specifically, there are two conductive plastics 52. Each conductive plastic 52 has multiple conductive parts 521 corresponding to multiple ground terminals 2G in a row of conductive terminals 2. The multiple conductive parts 521 and multiple metal pieces 3 are respectively disposed on the front and rear sides of the ground terminals 2G, and each conductive part 521 is electrically connected to a corresponding ground terminal 2G. In this way, the conductive plastic 52 connects all the ground terminals 2G in a row of conductive terminals 2 in series to absorb noise between signal terminals 2S between adjacent ground terminals 2G and improve the resonance of signal transmission, thereby improving the signal integrity of the electrical connector.

[0049] like Figure 3 , Figure 10 and Figure 11As shown, the grounding component 6 is made of a metal sheet by stamping. The grounding component 6 is disposed between the fixing base 51 and the covering part 41. The grounding component 6 does not directly contact the grounding terminal 2G, but indirectly conducts electricity to the grounding terminal 2G through contact with the conductive plastic 52, thereby making the grounding component 6, the grounding terminal 2G and the conductive part 521 share the same ground. The grounding component 6 includes a plate body 61, a plurality of shielding parts 62 protruding from the upper end of the plate body 61, and a plurality of solder feet 63 protruding from the lower end of the plate body 61. The plate body 61 has a plurality of through holes 611 in the front-back direction. The grounding component 6 is sleeved on the insert post 42 through the through holes 611 and is clamped between the plastic part 4 and the fixing base 51. This makes it easier to assemble the grounding component 6 together with the terminal module and the plug 5 and then install it into the insulating shell 1, making the assembly more convenient. Multiple shielding portions 62 are spaced apart in the left-right direction, and the shielding portions 62 are positioned in the front-back direction corresponding to the middle section 21 of the signal terminal 2S. This is used to shield the electromagnetic waves scattered by the signal terminal 2S in one row of conductive terminals 2 to the signal terminal 2S in another row of conductive terminals 2, thereby reducing near-end crosstalk. Specifically, the shielding portions 62 and the shielding portions 32 are respectively positioned opposite each other on the front and back sides of the signal terminal 2S. Each conductive portion 521 passes through the gap between two adjacent shielding portions 62 and extends into the through hole 411 of the plastic part 4 to contact the grounding terminal 2G. The solder feet 63 correspond one-to-one with the tail 23 of the grounding terminal 2G in the front-back direction, and the solder feet 63 are also used to solder to the circuit board 300. In this way, on the one hand, the product strength of the electrical connector 100 can be increased, and on the other hand, a multi-point common ground effect can be formed to achieve the purpose of reducing crosstalk.

[0050] The magnitude of far-end crosstalk (FEXT) is related to the difference between capacitive and inductive coupling. The FEXT coefficient is a direct measure of the peak voltage Vf of the far-end crosstalk, and is usually expressed as Vf. f With signal voltage V a The relationship between the ratios is as follows: FEXT represents the far-end crosstalk coefficient; V f V represents the voltage at the far end of the static line. a Represents the signal line voltage; Len represents the coupling length of the coupling region between the two lines; K f Represents the far-end coupling coefficient that is only related to the intrinsic terms; V represents the signal transmission speed on the line; C mL Indicates mutual compatibility per unit length; C L L represents the capacitance per unit length along the signal path. mL Indicates mutual inductance per unit length; L LThis represents the inductance per unit length along the signal path. As shown in the above formula, generally speaking, in high-speed connectors, capacitive coupling is less than inductive coupling. Increasing capacitive coupling essentially means using more capacitive coupling to offset inductive coupling, thus making the above formula... The value of capacitive coupling decreases, but if the increase in capacitive coupling is too large, the difference between capacitive coupling and inductive coupling will increase instead, which is not conducive to the improvement of far-end crosstalk. Therefore, the increase in capacitive coupling needs to be moderate. In this invention, by cutting a portion of the metal sheet 3, the metal sheet 3 forms a main body 31 and shielding portions 32 protruding from the left and right ends of the main body 31. The two adjacent shielding portions 32 of the two metal sheets 3 are used to shield the middle section 21 of the two adjacent signal terminals 2S. At the same time, the height of the shielding portion 32 in the vertical direction is less than the height of the main body 31 in the vertical direction. Compared with the rectangular uncut metal sheet 3, that is, the shielding portion 32 and the main body 31 are the same width in the vertical direction, the increase in capacitive coupling is too large, which increases the difference between capacitive coupling and inductive coupling. This not only has a poor effect on improving far-end crosstalk, but also produces other interference. Therefore, the increase in capacitive coupling in this invention is appropriate, that is, the difference in inductive coupling is small. Thus, the effect of far-end crosstalk of this electrical connector 100 is significantly improved.

[0051] like Figure 13 and Figure 16 As shown, under the same conditions, conductive plastic 52 is used as a variable for comparison. Here, S1 represents the crosstalk standard in the PCIE 7.0 specification when the port rate is 128GT / S, NEXT represents near-end crosstalk, S2 represents the amplitude of near-end crosstalk, FEXT represents far-end crosstalk, and S3 represents the amplitude of far-end crosstalk. Figure 13 , Figure 14 The diagram shown is an analysis of near-end crosstalk and far-end crosstalk in this embodiment, where conductive plastic 52 and T-shaped metal sheet 3 are provided. Figure 15 and Figure 16 The diagram shown is an analysis of near-end crosstalk and far-end crosstalk when only the T-shaped metal piece 3 is provided on the electrical connector. Figure 13 and Figure 15 The comparison shows that the near-end crosstalk is larger and the resonance amplitude is larger. Figure 14 and Figure 16 The comparison shows that when the conductive plastic 52 is not installed on the electrical connector, the improvement in far-end crosstalk is also better. Figure 14 The difference is that, compared to other solutions, the combination of the T-shaped metal sheet 3 and the conductive plastic 52 in this invention can not only improve far-end crosstalk but also not affect near-end crosstalk, thus reducing overall crosstalk and contributing to the integrity of signal transmission.

[0052] The beneficial effects of this utility model are as follows:

[0053] 1. The metal sheet 3 is insulated from the grounding terminal 2G. The shielding portion 32 of the metal sheet 3 protrudes from the main body 31 in the left-right direction. The two adjacent shielding portions 32 of the two metal sheets 3 are used to partially shield the middle section 21 of the two adjacent signal terminals 2S. At the same time, the height of the shielding portion 32 in the vertical direction is less than the height of the main body 31 in the vertical direction. In this way, the capacitive coupling at the position of the signal terminal 2S is increased. According to the formula: The magnitude of far-end crosstalk is related to the difference between capacitive coupling and inductive coupling. Increasing capacitive coupling is actually using more capacitive coupling to cancel inductive coupling. This setting not only reduces far-end crosstalk, but also makes the conductive part 521 electrically connected to the ground terminal 2G to form a grounding loop, which optimizes the shielding effect, reduces resonance, and improves the integrity of signal transmission.

[0054] 2. In high-frequency connectors, differential pairs are typically used to transmit high-frequency signals. Differential signals have better common-mode interference immunity and their signal paths are symmetrical, which can better ensure signal integrity and reduce signal attenuation and distortion. On this basis, the distance W3 between two adjacent shielding parts 32 is not greater than the distance W2 between the contact parts 22 of the two signal terminals 2S in the differential signal pair. That is, the overlap between the shielding part 32 and the middle section 21 of the corresponding signal terminal 2S is small. This makes it easier to adjust the capacitive coupling so that the difference between capacitive coupling and inductive coupling is reduced, thereby reducing far-end crosstalk and further improving the signal integrity of the differential signal.

[0055] 3. The main body 31 is provided with shielding parts 32 on both the left and right sides. That is, a metal sheet 3 can shield the area of ​​two adjacent signal terminals 2S on the left and right sides of a grounding terminal 2G. Compared with a shielding part 32 on one side, the shielding area is continuously shielded by one of the signal terminals 2S of each of the two pairs of signal terminals 2S, which can better reduce the far-end crosstalk between two pairs of adjacent signal terminals 2S. The width of the main body 31 in the left and right direction is smaller than the width of the shielding part 32 extending in the left and right direction. The main body 31 does not shield the adjacent signal terminals 2S, only the shielding part 32 shields the signal terminals 2S. In this way, capacitive coupling will not be further increased, and the difference between capacitive coupling and inductive coupling can be reduced, thereby reducing far-end crosstalk.

[0056] 4. The distance between the two elastic parts 212 of two adjacent signal terminals 2S in the left-right direction is smaller than the distance between the two fixed parts 211 in the left-right direction. That is, the distance between the elastic parts 212 of each pair of signal terminals 2S is brought closer, and the terminals are tightly coupled. This helps to reduce crosstalk during signal transmission. On this basis, the fixed part 211 of the signal terminal 2S is partially covered by the shielding part 32, thus ensuring that the increase in capacitive coupling is appropriate.

[0057] 5. Compared with setting the metal sheet 3 in the side wall 13 of the insulating shell 1, embedding the metal sheet 3 and the conductive terminal 2 together in the plastic part 4 is beneficial to keep the gap W1 between the multiple grounding terminals 2G and the multiple metal sheets 3 consistent, so that each metal sheet can play the same role in reducing far-end crosstalk. At the same time, it is convenient to assemble the metal sheet 3 and the conductive terminal 2 together in the insulating shell 1.

[0058] 6. The plastic part 4 is provided with a window 412 that exposes part of the metal sheet 3. The window 412 is conducive to the positioning of the metal sheet 3 during injection molding. That is, during injection molding, multiple metal sheets are positioned in a fixed position to avoid the pressure during injection molding from pushing the metal sheet 3 out of place.

[0059] 7. The conductive terminals 2 are provided in two rows. There is near-end crosstalk between the two rows of conductive terminals 2. The grounding component 6 is in contact with the conductive part 521, and the conductive part 521 is in contact with the grounding terminal 2G. Therefore, the grounding component 6, the conductive part 521 and the grounding terminal 2G are connected in series and share a common ground. The shielding part 62 of the grounding component 6 is provided corresponding to the signal terminal 2S. In this way, the near-end crosstalk between the two rows of conductive terminals 2 is shielded. At the same time, the height of the shielding part 62 in the vertical direction is higher than that of the plug 5 and the plastic part 4. Thus, the shielding range of the shielding part 62 is larger, the shielding effect is better, and it is more conducive to reducing near-end crosstalk.

[0060] 8. The plastic part 4 is secured in the retaining hole 511 of the fixing base 51 by its retaining post 42. The plastic part 4 is first fixed to the fixing base 51 and then assembled together with the insulating shell 1. This makes it easier for the conductive part 521 to contact the grounding terminal 2G, and also makes it easier to assemble as a whole.

[0061] 9. The gap W1 between the metal piece 3 and the grounding terminal 2G in the front-to-back direction is 0.2mm-0.4mm. Within this gap W1 range, the far-end crosstalk of the electrical connector 100 of this utility model is significantly improved. When the gap W1 is less than 0.2mm, the metal piece 3 is easily electrically coupled to the grounding terminal 2G, which results in the metal piece 3 and the grounding terminal 2G sharing the same ground and failing to improve the far-end crosstalk. When the gap W1 is greater than 0.4mm, due to the small size of the metal piece 3, the increase in capacitive coupling will be affected when the distance is large. That is, the increase in capacitive coupling will be reduced compared to when the gap W1 is in the range of 0.2mm-0.4mm, thus the effect of improving the far-end crosstalk is worse.

[0062] The above detailed description is only a description of the preferred embodiment of this utility model and is not intended to limit the patent scope of this utility model. Therefore, all equivalent technical changes made using the content of this invention's specification and illustrations are included within the patent scope of this invention.

Claims

1. An electrical connector for mating with a plug, characterized in that, include: An insulating housing having a slot, a mounting slot and a plurality of receiving slots, the slot extending in a left-right direction and communicating with the mounting slot in a vertical direction, the slot being used to receive the connector, and the plurality of receiving slots being disposed on at least one side of the slot in a front-back direction and communicating with the slot and the mounting slot. Multiple conductive terminals are mounted to multiple receiving slots via the mounting slots, including signal terminals and grounding terminals disposed on one side of the signal terminals. Each conductive terminal includes a middle section and a contact portion and a tail portion located at both ends of the middle section. The contact portion is exposed in the slot, and the tail portion is exposed outside the insulating housing. Multiple metal sheets are spaced apart in the insulating housing in the left-right direction. The metal sheets are insulated from the grounding terminal in the front-back direction. Each metal sheet has a main body and a shielding portion extending from at least one side of the main body in the left-right direction. The main body extends in the up-down direction and is disposed corresponding to the middle section of the grounding terminal. Each shielding portion shields the middle section of one signal terminal. The height of the shielding portion in the up-down direction is less than the height of the main body in the up-down direction. A plug is received in the mounting groove, including a fixing base and a plurality of conductive portions extending toward a plurality of grounding terminals relative to the fixing base. The conductive portions and the metal sheet are respectively disposed opposite to each other on the front and rear sides of the grounding terminals, and the conductive portions are electrically connected to the corresponding grounding terminals.

2. The electrical connector as described in claim 1, characterized in that: Two signal terminals located between two adjacent grounding terminals form a differential signal pair. Two adjacent shielding portions of two adjacent metal plates are used to partially shield the middle section of the two signal terminals in the differential signal pair, and the distance between the two adjacent shielding portions is not greater than the distance between the contact portions of the two signal terminals in the differential signal pair.

3. The electrical connector as described in claim 1, characterized in that: The main body is provided with the shielding portion on both the left and right sides, and the width of the main body in the left and right direction is smaller than the width of the shielding portion extending in the left and right direction.

4. The electrical connector as described in claim 1, characterized in that: The intermediate section includes a fixing part and an elastic part located between the contact part and the fixing part. The fixing part is embedded in a plastic part, and the elastic part and the tail part both extend out of the plastic part. The distance between the two elastic parts of a pair of signal terminals in the left-right direction is less than the distance between the two fixing parts in the left-right direction. The shielding part extends from the top of the main body in the left-right direction. The shielding part is located on the side of the fixing part closer to the elastic part, and the projection of the shielding part in the front-back direction only partially overlaps with the fixing part of the signal terminal.

5. The electrical connector as described in claim 1, characterized in that: Multiple conductive terminals and multiple metal sheets are embedded in a plastic part and assembled together with it to the insulating shell. The conductive terminals and the metal sheets are separated by the wall thickness gap of the plastic part. The plastic part has a through hole that exposes the grounding terminal. The conductive part extends into the through hole and contacts the grounding terminal.

6. The electrical connector as described in claim 5, characterized in that: The plastic part has multiple through windows along the left-right direction on the side away from the plug, and the multiple windows expose the side of the multiple metal sheets away from the conductive terminals.

7. The electrical connector as claimed in claim 5, characterized in that: The conductive terminals are arranged in two rows, the plug is disposed between the two rows of conductive terminals, and a plurality of metal plates are disposed on the outside of the two rows of conductive terminals. The electrical connector also includes a grounding component disposed between the plastic part and the fixing base. The grounding component includes a plate, a shielding part protruding from the upper end of the plate, and solder feet protruding from the lower end of the plate. A plurality of solder feet are exposed outside the insulating shell and are disposed one-to-one with the tails of the plurality of grounding terminals. The shielding part is higher than the plug and the plastic part in the vertical direction. The shielding part is used to shield the middle section of the corresponding signal terminal in the front-back direction. The shielding part and the shielding part are respectively disposed opposite to each other on the front and back sides of the signal terminal. Each shielding part is located between two adjacent conductive parts and is electrically connected to them.

8. The electrical connector as claimed in claim 7, characterized in that: The plastic part has a protruding insert post extending in the front-to-back direction. The fixing base has an insert hole corresponding to the insert post. The insert hole is located below the conductive part. The plastic part is secured in the insert hole in the front-to-back direction through the insert post. The plate has a through hole in the front-to-back direction. The grounding component is sleeved on the insert post through the through hole and is clamped between the plastic part and the fixing base.

9. The electrical connector as claimed in claim 1, characterized in that: The gap between the metal sheet and the corresponding grounding terminal in the front-to-back direction is in the range of 0.2mm-0.4mm.

10. An electrical connector for mating with a plug, characterized in that, include: An insulating housing has a slot, a mounting slot, and a plurality of receiving slots. The slot extends in a left-right direction and communicates with the mounting slot. The slot is used to receive the plug-in. The plurality of receiving slots are located on at least one side of the slot in a front-back direction and communicate with the slot and the mounting slot. Multiple conductive terminals are mounted to multiple receiving slots via the mounting slots, including signal terminals and grounding terminals disposed on one side of the signal terminals. Each conductive terminal includes a middle section and a contact portion and a tail portion located at both ends of the middle section. The contact portion is exposed in the slot, and the tail portion is exposed outside the insulating housing. Multiple metal sheets are arranged at intervals in the left-right direction in the insulating housing. The metal sheets are insulated from the grounding terminal in the front-back direction. Each metal sheet has a main body and a shielding portion extending from at least one side of the main body in the left-right direction. The main body extends in the up-down direction and is disposed corresponding to the middle section of the grounding terminal. Two adjacent shielding portions of two adjacent metal sheets are used to shield the middle sections of two adjacent signal terminals. The height of the shielding portion in the up-down direction is less than the height of the main body in the up-down direction. The plug, housed in the mounting groove, includes a fixing base and a plurality of conductive portions extending toward the conductive terminal relative to the fixing base. The conductive portions and the metal sheet are respectively disposed opposite to each other on the front and rear sides of the grounding terminal, and the conductive portions are electrically connected to the corresponding grounding terminals. A grounding component, located between the conductive terminal and the fixing base, includes a plate, a shielding portion protruding from the upper end of the plate, and solder feet protruding from the lower end of the plate. Multiple solder feet are exposed outside the insulating shell and correspond one-to-one with the tail portions of multiple grounding terminals. The shielding portion is higher than the plug in the vertical direction and is used to shield the middle section of the signal terminal in the front-back direction. The shielding portion and the shielding portion are respectively disposed opposite to each other on the front and back sides of the signal terminal. Each shielding portion is located between and electrically connected to two adjacent conductive portions.

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