Shielded high-speed extension bus connector

Abstract

The invention provides a high-speed expansion bus connector with a shielding function, which comprises an insulating body, a central slot which is concaved downwards from the middle part of the top surface along the lengthwise direction, and terminal accommodating holes which penetrate through the top surface and the bottom surface of the insulating body are respectively formed in lengthwise side walls on two sides of the central slot; shielding piece side surface accommodating grooves along the lengthwise direction of the insulating body are formed in two sides of the width direction of the bottom surface of the insulating body; the plurality of metal terminals are respectively fixed in the corresponding terminal accommodating holes in a one-to-one correspondence manner, and comprise a plurality of grounding terminals and a plurality of signal terminals; the shielding piece comprises a bottom piece and two side pieces, the bottom piece is connected with the lengthwise bottom edges of the two side pieces, each side piece is fixed in the corresponding shielding piece side face accommodating groove, each side piece is provided with a plurality of grounding pieces, and each grounding piece is in contact with the holding part of the grounding terminal; one surface of the holding part of each grounding terminal is in contact with one or two grounding sheets, and when the holding part of each grounding terminal is in contact with one grounding sheet, the contact position is at the upper part, the middle part or the lower part of the holding part of the grounding terminal; when the holding part of each grounding terminal is in contact with the two grounding sheets, the contact positions of the two grounding sheet terminals are respectively at the upper part and the lower part, or the upper part and the middle part, or the middle part and the lower part of the holding part of the grounding terminal; the high-speed expansion bus connector with the shielding function is better in shielding effect, more effective in signal resonance reduction, higher in signal transmission speed and capable of meeting the requirements of higher transmission rate and transmission speed.

Description

Technical Field

[0001] The invention belongs to the field of connectors, and in particular relates to a shielded high-speed expansion bus connector. Background Art

[0002] Electronic and IT products require faster and faster transmission speeds, and products must be compatible with older versions while being updated. For example, the physical interface standards of PCIE slot connectors have not changed between PCIE 4.0 and PCIE 5.0, but the transmission speed of PCIE 5.0 has doubled. The transmission speed of PCIE 6.0 in the future will be doubled compared to PCIE 5.0, which places higher requirements on connector design to meet the increase in transmission speed.

[0003] Chinese patent CN202210537972.9 discloses a high-speed electrical connector, including an insulating body and a plurality of metal terminals and shielding members fixed in the insulating body. The middle of the top surface of the insulating body is concave in the longitudinal direction to form a central slot, and there are terminal accommodating holes on both sides of the central slot. There are shielding member side receiving grooves along the longitudinal direction of the insulating body on both sides of the bottom surface width direction of the insulating body. The insulating body is also provided with grounding plate accommodating grooves at some positions, and the grounding plate accommodating grooves are located between the terminal accommodating holes and the shielding member side receiving grooves and are connected to the terminal accommodating holes and the shielding member side receiving grooves. The metal terminal includes a plurality of grounding terminals and a plurality of signal terminals. The shielding member includes a bottom sheet and two side sheets, both of which are in a hollow state, the bottom sheet connects the longitudinal bottom edges of the two side sheets, the side sheets include an upper side, a lower side, and a side connecting sheet connecting the upper side and the lower side, the upper side and the lower side have absorbing sheets, and the lower side also has a grounding sheet.

[0004] The high-speed electrical connector greatly improves the resonance in high-frequency state, greatly reduces the loss of signal transmission, and greatly improves the signal integrity performance of the electrical connector, which can meet the needs of higher transmission rates. However, each grounding terminal of the high-speed electrical connector only contacts one grounding plate, and the height of each grounding plate is the same. This method still has the problem of signal resonance, which will slow down the signal transmission speed. Therefore, it needs to be improved. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a shielded high-speed expansion bus connector to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution used in the present invention is: A shielded high-speed expansion bus connector, comprising: An insulating body, having a central slot formed by being concave from the middle of the top surface along the longitudinal direction, the longitudinal side walls on both sides of the central slot are respectively provided with terminal receiving holes penetrating the top and bottom surfaces of the insulating body, and the two sides of the bottom surface of the insulating body in the width direction are provided with side receiving grooves of the shielding member along the longitudinal direction of the insulating body; A plurality of metal terminals are fixed in corresponding terminal receiving holes one by one, including a plurality of grounding terminals and a plurality of signal terminals; A shielding member, comprising a bottom sheet and two side sheets, the bottom sheet connecting the longitudinal bottom edges of the two side sheets, each side sheet being fixed in a corresponding side receiving groove of the shielding member, each side sheet being provided with a plurality of grounding sheets, each grounding sheet being in contact with a retaining portion of a grounding terminal; One side of the retaining portion of each grounding terminal contacts one or two upper and lower grounding plates. When the retaining portion of each grounding terminal contacts one grounding plate, the contact position is at the upper, middle or lower part of the retaining portion of the grounding terminal; when the retaining portion of each grounding terminal contacts two upper and lower grounding plates, the contact positions of the two grounding plate terminals are respectively at the upper and lower part, or the upper and middle part, or the middle and lower part of the retaining portion of the grounding terminal.

[0007] Furthermore, at the position where two grounding terminals are adjacent, the retaining parts of the two grounding terminals only contact one grounding plate, and the height positions are inconsistent; at one grounding terminal, the upper part, middle part or lower part of the retaining part of one grounding terminal contacts one grounding plate.

[0008] Further, at a position where two grounding terminals are adjacent, the retaining portions of the two grounding terminals both contact two grounding sheets; at one grounding terminal, the retaining portion of the grounding terminal contacts two grounding sheets.

[0009] Furthermore, at a position where two grounding terminals are adjacent, the retaining portions of the two grounding terminals each only contact one grounding sheet, and the height positions are inconsistent; at one grounding terminal, the retaining portion of the grounding terminal contacts two grounding sheets.

[0010] Furthermore, the side piece includes an upper side, a lower side and a side connecting piece connecting the upper side and the lower side, the grounding piece contacting the upper part of the holding part is connected to the upper side, and the grounding piece contacting the lower part of the holding part is connected to the lower side.

[0011] Furthermore, there is a partition wall between the side receiving groove of the shielding member and the terminal accommodating hole. The grounding plate connected to the lower side is bent around the bottom of the partition wall and then extends into the terminal accommodating hole from the bottom of the terminal accommodating hole accommodating the grounding terminal to contact the retaining portion of the grounding terminal.

[0012] Furthermore, the grounding plate connected to the lower side includes a bending portion, which is located below the bottom of the partition wall, the outer end of the bending portion is connected to the lower side of the side plate, the inner end of the bending portion is bent upward and extends to form a contact arm, the inner surface of the upper end of the contact arm is in contact with the outer surface of the grounding terminal retaining portion, and the bending portion of the grounding plate is located above the welding portion of the grounding terminal that contacts the contact arm of the grounding plate.

[0013] Furthermore, the contact arm includes an inclined section and a contact section, the lower end of the inclined section is connected to the inner end of the bending portion, the upper end of the inclined section is connected to the lower end of the contact section, the inner surface of the contact section contacts the outer surface of the holding portion of the grounding terminal, the lower end of the inclined section is away from the holding portion, and the lower end of the holding portion is bent outward and extended to form the welding portion.

[0014] Furthermore, a side connecting piece is connected between the upper and lower sides of each of the side pieces, and absorbing pieces are arranged at the upper and lower sides at positions corresponding to two adjacent terminals which are signal terminals. The absorbing pieces are hollowed out in a ring shape, and the width of the absorbing pieces along the longitudinal direction of the shielding component does not exceed the spacing between the two opposite sides of the two signal terminals. The upper and lower absorbing pieces are not directly connected and conducted, but are indirectly connected and conducted through the upper side, the side connecting piece and the lower side. A bottom connecting piece is arranged between the grounding pieces at adjacent positions of the two grounding terminals to connect the bottom piece and the side pieces.

[0015] Furthermore, at least one of the two ends of the bottom sheet in the longitudinal direction is provided with an end connecting sheet to connect the bottom sheet with the two side sheets.

[0016] Compared with the prior art, the beneficial effects of the present invention are mainly reflected in that: by setting the holding portion of each grounding terminal to contact one or two grounding plates on one side, when the holding portion of each grounding terminal contacts one grounding plate, the contact position is at the upper part, middle part or lower part of the holding portion of the grounding terminal, and when the holding portion of each grounding terminal contacts two grounding plates, the contact positions of the two grounding plate terminals are respectively at the upper part and lower part, or the upper part and middle part, or the middle part and lower part of the holding portion of the grounding terminal, so that the shielding effect is better, the resonance of the signal is more effectively reduced, and the signal transmission speed is faster, which can meet the requirements of higher transmission rate and transmission speed (such as PCIe 6.0 performance requirements); by making the bent portion of the grounding sheet located above the welding portion of the grounding terminal in contact with the contact arm of the grounding sheet, if the grounding sheet falls, it will be held by the grounding terminal, and there is no need to worry about the grounding sheet falling out and causing the signal terminal to short-circuit; by designing absorbing sheets on the upper and lower sides, the absorbing sheets on the upper and lower sides are not directly connected and conducted but indirectly connected and conducted through the upper side, the side connecting sheet and the lower side, and the width of the absorbing sheet along the longitudinal direction of the shielding member does not exceed the spacing between the two opposite sides of the two signal terminals, thereby improving the resonance in the high-frequency state, greatly reducing the loss of signal transmission, and greatly improving the signal integrity performance of the electrical connector, which can meet the needs of higher transmission rates. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional exploded schematic diagram of a shielded high-speed expansion bus connector according to the first embodiment of the present invention; Figure 2 It is a three-dimensional assembly schematic diagram of a shielded high-speed expansion bus connector; Figure 3 It is a three-dimensional exploded schematic diagram of the insulating body and the shielding member; Figure 4 It is a three-dimensional schematic diagram of the combination of the insulating body and the shielding member; Figure 5 It is a partial enlarged view of the insulation body; Figure 6 is a top view of the shielding member; Figure 7 is a three-dimensional diagram of a shielding member; Figure 8 It is a partial schematic diagram of the shielding member after being cut longitudinally in the middle; Fig. 9 is a three-dimensional diagram of a metal terminal; Fig.10 The relationship between the metal terminal and the shield Figure 1 ; Fig.11 The relationship between the metal terminal and the shield Figure 2 ; Fig.12 The relationship between the metal terminal and the shield Figure 3 ; Fig.13 This is the cross section of the metal terminal when combined with the insulating body and shielding part. Figure 1 , the cutting position is at the center of the grounding terminal on one side of the bottom connecting piece; Fig.14 This is the cross section of the metal terminal when combined with the insulating body and shielding part. Figure 1 , the cutting position is at the center of the ground terminal on the other side of the bottom connecting piece; Fig.15 is a three-dimensional diagram of a shielding member according to a second embodiment of the present invention; Fig.16 for Fig.15 A partial stereogram of the connection with the metal terminal; Fig.17 It is a cross-sectional view of the shielding member, the metal terminal and the insulating body when they are combined in the second embodiment of the present invention; Fig.18 It is a three-dimensional diagram of a shielding element according to the third embodiment of the present invention.

[0018] Description of the accompanying drawings: insulating body 1, central slot 11, terminal accommodating hole 12, shielding member side receiving groove 13, partition wall 14, slot 15, hot melt block 16, metal terminal 2, contact portion 21, elastic arm 22, holding portion 23, welding portion 24, guide portion 25, pressing portion 26, extension portion 27, shielding member 3, bottom plate 31, end connecting plate 311, side plate 32, upper side 32a, lower side 32b, side connecting plate 32c, opening 32d, grounding plate 321, bending portion 321a, contact arm 321b, inclined section 321b1, contact section 321b2, bottom connecting plate 322, absorbing plate 323, iron foot 4. DETAILED DESCRIPTION

[0019] In order to facilitate a better understanding of the purpose, structure, characteristics and effects of the present invention, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods.

[0020] like Figure 1-14 As shown, the shielded high-speed expansion bus connector of the present invention comprises an insulating body 1 , a plurality of metal terminals 2 and a shielding member 3 fixed in the insulating body 1 .

[0021] The middle of the top surface of the insulating body 1 is concave in the longitudinal direction to form a central slot 11. The longitudinal side walls on both sides of the central slot 11 have terminal accommodating holes 12. The terminal accommodating holes 12 penetrate the top and bottom surfaces of the insulating body 1. The terminal accommodating holes 12 also penetrate the inner wall surface of the longitudinal side walls. The two sides of the bottom surface width direction of the insulating body 1 have shielding component side accommodating grooves 13 along the longitudinal direction of the insulating body 1. A partition wall 14 is provided between the shielding component side accommodating groove 13 and the terminal accommodating hole 12. The partition wall 14 is provided with slots 15 at the corresponding positions of each terminal accommodating hole 12. The bottom of the partition wall 14 and the bottom of the side wall outside the shielding component side accommodating groove 13 protrude to form a hot melt block 16. After hot melting, the hot melt block 16 can be fixedly embedded in the shielding component side accommodating groove 13. Iron feet 4 are fixed at the bottom of both ends of the insulating body 1 in the longitudinal direction. The iron feet 4 are used to fix the insulating body 1 on the circuit board.

[0022] The metal terminal 2 includes a plurality of ground terminals G and a plurality of signal terminals S, and the structure of the signal terminal S is the same as that of the ground terminal G. Each metal terminal 2 includes a contact portion 21, an elastic arm 22, a retaining portion 23 and a welding portion 24 connected in sequence from top to bottom, the upper end of the contact portion 21 is connected to the pressing portion 26 through a guide portion 25, and the lower end of the retaining portion 23 is connected to the welding portion 24 through an extension portion 27 (the lower end of the retaining portion 23 is bent outward and extended to form the welding portion 24). The retaining portion 23 is retained in the terminal accommodating hole 12 of the insulating body 1.

[0023] The shielding member 3 includes a bottom sheet 31 and two side sheets 32. The bottom sheet 31 is located below the bottom of the insulating body 1, and the bottom sheet 31 connects the longitudinal bottom edges of the two side sheets 32. An end connecting sheet 311 is provided at one end of the bottom sheet 31 in the longitudinal direction to connect the two side sheets 32 and the bottom sheet 31, and another end connecting sheet 311 is provided at the other end of the bottom sheet 31 in the longitudinal direction that is not connected to the bottom sheet 31, and the other end connecting sheet 311 connects the two side sheets 32.

[0024] The two side pieces 32 are identical and asymmetrical in structure. Each side piece 32 is provided with a plurality of grounding pieces 321 , each grounding piece 321 bends and extends toward the inside of the insulating body 1 and contacts the outer surface of the retaining portion 23 of the grounding terminal G facing the outside of the insulating body 1 . At the place where two grounding terminals G are adjacent, the retaining portions 23 of the two grounding terminals G only contact one grounding plate 321, and the height positions are inconsistent. Specifically, the upper portion of the retaining portion 23 of one grounding terminal G contacts one grounding plate 321, and the lower portion of the retaining portion 23 of the other grounding terminal G contacts the other grounding plate 321 (or the upper portion of the retaining portion 23 of one grounding terminal G contacts one grounding plate 321, and the middle portion of the retaining portion 23 of the other grounding terminal G contacts the other grounding plate 321; or the lower portion of the retaining portion 23 of one grounding terminal G contacts one grounding plate 321, and the middle portion of the retaining portion 23 of the other grounding terminal G contacts the other grounding plate 321); at the place where there is only one grounding terminal G, the upper portion, lower portion, or middle portion of the retaining portion 23 of one grounding terminal G contacts one grounding plate 321.

[0025] The side piece 32 includes an upper side 32a, a lower side 32b and a side connecting piece 32c connecting the upper side 32a and the lower side 32b. The grounding piece 321 contacting the upper part of the holding part 23 is connected to the upper side 32a, and the grounding piece 321 contacting the lower part of the holding part 23 is connected to the lower side 32b.

[0026] The grounding plate 321 connected to the lower edge 32 b is bent around the bottom of the partition wall 14 and extends from the bottom of the terminal accommodating hole 12 that accommodates the grounding terminal G into the terminal accommodating hole 12 and contacts the retaining portion 23 of the grounding terminal G. A portion of the grounding plate 321 extends into the slot 15. The grounding plate 321 connected to the lower edge 32b includes a bending portion 321a, which is located below the bottom of the partition wall 14 and outside the slot 15. The outer end of the bending portion 321a is connected to the lower edge 32b of the side plate 32, and the inner end of the bending portion 321a is bent and extended upward to form a contact arm 321b. The contact arm 321b extends into the slot 15, and the inner surface of the upper end of the contact arm 321b contacts the outer surface of the retaining portion 23 of the grounding terminal G. The bending portion 321a of the grounding plate 321 is located above the welding portion 24 and the extension portion 27 of the grounding terminal G that are in contact with the contact arm 321b of the grounding plate 321.

[0027] The contact arm 321b includes an inclined section 321b1 and a contact section 321b2, the lower end of the inclined section 321b1 is connected to the inner end of the bending portion 321a, the upper end of the inclined section 321b1 is connected to the lower end of the contact section 321b2, the inner surface of the contact section 321b2 is in contact with the outer surface of the retaining portion 23 of the ground terminal G, and the lower end of the inclined section 321b1 is away from the retaining portion 23.

[0028] A side connecting piece 32c is provided between the upper side 32a and the lower side 32b at a position corresponding to only one signal terminal S. A side connecting piece 32c and two openings 32d are provided between the upper side 32a and the lower side 32b at a position corresponding to two adjacent metal terminals, which are both grounding terminals G. The two grounding terminals G correspond to the two openings 32d one by one, and the side connecting piece 32c is located between the two openings 32d. A bottom connecting piece 322 is provided between the grounding pieces 321 at positions corresponding to the grounding terminals G of the two adjacent metal terminals, connecting the bottom piece 31 and the bottom side 32b of the side piece 32. The end connecting piece 311 is connected to the bottom side 32b of the two side pieces 32. Each bending portion 321a is integrally connected to the outer end of a bottom connecting piece 322.

[0029] The upper side 32a and the lower side 32b are provided with absorbing plates 323 at positions corresponding to the two signal terminals S. The absorbing plates 323 of the upper side 32a and the lower side 32b are not directly connected and conducted, but are indirectly connected and conducted through the upper side 32a, the side connecting plate 32c and the lower side 32b. The absorbing plates 323 are hollowed out in a ring shape; the width D1 of the absorbing plates 323 along the longitudinal direction of the shielding member 3 does not exceed the spacing D2 between the two opposite sides of the two signal terminals S.

[0030] Compared with the prior art, the beneficial effects of the present invention are mainly reflected in that: at the place where two grounding terminals G are adjacent, the upper part of the retaining portion 23 of one grounding terminal G contacts a grounding plate 321, and the lower part of the retaining portion 23 of the other grounding terminal G contacts another grounding plate 321 (or the upper part of the retaining portion 23 of one grounding terminal G contacts a grounding plate 321, and the middle part of the retaining portion 23 of the other grounding terminal G contacts another grounding plate 321; or the lower part of the retaining portion 23 of one grounding terminal G contacts a grounding plate 321, and the middle part of the retaining portion 23 of the other grounding terminal G contacts another grounding plate 321); at the place where there is only one grounding terminal G, the upper part, lower part or middle part of the retaining portion 23 of one grounding terminal G contacts a grounding plate 321, so that the shielding effect is better, the resonance of the signal is reduced more effectively, and the signal transmission speed is faster, which can meet the requirements of higher transmission rate and transmission speed (such as PCIe 6.0 performance requirements); by making the bent portion 321a of the grounding sheet 321 located above the welding portion 24 of the grounding terminal G in contact with the contact arm 321b of the grounding sheet 321, if the grounding sheet 321 falls, it will be supported by the grounding terminal G, and there is no need to worry that the grounding sheet 321 will fall out and cause a short circuit of the signal terminal S; by designing the bottom sheet 31 to connect the two side sheets 32, the side sheet 32 ​​is designed to be an upper side 32a and a lower side 32b, and the side connecting sheet 32c is designed to connect the upper side 32a and the lower side 32b, and the absorbing sheet 323 is designed on the upper side 32a and the lower side 32b, and the absorbing sheet 323 is designed on the lower side 32b. The grounding sheet 321 and the bottom connecting sheet 322 are designed, and the contact position between the grounding sheet 321 and the grounding terminal G is changed, so that the absorbing sheet 323 of the upper side 32a and the lower side 32b are not directly connected and conducted but indirectly connected and conducted through the upper side 32a, the side connecting sheet 32c and the lower side 32b, and the width of the absorbing sheet 323 along the longitudinal direction of the shielding member 3 does not exceed the distance between the two opposite sides of the two signal terminals S. This improves the resonance in the high-frequency state, greatly reduces the loss of signal transmission, and greatly improves the signal integrity performance of the electrical connector, which can meet the needs of higher transmission rates.

[0031] In other embodiments, the end connecting pieces 311 at both ends of the bottom piece 31 connect the bottom piece 31 and the two side pieces 32 .

[0032] In other embodiments, Figure 15-17As shown, at a location where two grounding terminals G are adjacent, the retaining portions 23 of the two grounding terminals G both contact two grounding plates 321, specifically, the upper and lower portions of the retaining portion 23 of each grounding terminal G respectively contact one grounding plate 321 (or the upper and middle portions of the retaining portion 23 of each grounding terminal G may respectively contact one grounding plate 321; or the lower and middle portions of the retaining portion 23 of each grounding terminal G may respectively contact one grounding plate 321); at a location where there is only one grounding terminal G, the retaining portion of the grounding terminal contacts two grounding plates 321, specifically, the upper and lower portions of the retaining portion 23 of one grounding terminal G may respectively contact one grounding plate 321 (or the upper and middle portions of the retaining portion 23 of one grounding terminal G may respectively contact one grounding plate 321; or the lower and middle portions of the retaining portion 23 of one grounding terminal G may respectively contact one grounding plate 321). Because the upper and lower parts, or the upper and middle parts, or the middle and lower parts of the retaining portion 23 of each grounding terminal G are in contact with a grounding plate 321, the shielding effect is better, the resonance of the signal is reduced more effectively, and the signal transmission speed is faster, which can meet the higher requirements of transmission rate and transmission speed (such as the performance requirements of PCIe 6.0).

[0033] In other embodiments, Fig.18 As shown, at the adjacent part of the two grounding terminals G, the retaining portions of the two grounding terminals only contact one grounding sheet, and the height positions are inconsistent. Specifically, the upper portion of the retaining portion 23 of one grounding terminal G contacts one grounding sheet 321, and the lower portion of the retaining portion 23 of the other grounding terminal G contacts the other grounding sheet 321 (or the upper portion of the retaining portion 23 of one grounding terminal G contacts one grounding sheet 321, and the middle portion of the retaining portion 23 of the other grounding terminal G contacts the other grounding sheet 321; or the lower portion of the retaining portion 23 of one grounding terminal G contacts the other grounding sheet 321). The upper and lower parts of the holding part 23 of one ground terminal G respectively contact one grounding sheet 321, and the middle part of the holding part 23 of another grounding terminal G contacts another grounding sheet 321); at a location where there is only one grounding terminal G, the holding part 23 of the grounding terminal G contacts two grounding sheets 321, specifically, the upper and lower parts of the holding part 23 of one grounding terminal G respectively contact one grounding sheet 321 (or the upper and middle parts of the holding part 23 of one grounding terminal G respectively contact one grounding sheet 321; or the lower and middle parts of the holding part 23 of one grounding terminal G respectively contact one grounding sheet 321). This method can also make the shielding effect better, reduce the resonance of the signal more effectively, make the signal transmission speed faster, and meet the requirements of higher transmission rate and transmission speed (such as the performance requirements of PCIe 6.0).

[0034] The present invention has been described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. A shielded high-speed expansion bus connector, characterized in that: include: An insulating body, having a central slot formed by being concave from the middle of the top surface along the longitudinal direction, the longitudinal side walls on both sides of the central slot are respectively provided with terminal receiving holes penetrating the top and bottom surfaces of the insulating body, and the two sides of the bottom surface of the insulating body in the width direction are provided with side receiving grooves of the shielding member along the longitudinal direction of the insulating body; A plurality of metal terminals are fixed in corresponding terminal receiving holes one by one, including a plurality of grounding terminals and a plurality of signal terminals; A shielding member, comprising a bottom sheet and two side sheets, the bottom sheet connecting the longitudinal bottom edges of the two side sheets, each side sheet being fixed in a corresponding side receiving groove of the shielding member, each side sheet being provided with a plurality of grounding sheets, each grounding sheet being in contact with a retaining portion of a grounding terminal; One side of the retaining portion of each grounding terminal contacts one or two grounding plates. When the retaining portion of each grounding terminal contacts one grounding plate, the contact position is at the upper, middle or lower part of the retaining portion of the grounding terminal; when the retaining portion of each grounding terminal contacts two grounding plates, the contact positions of the two grounding plate terminals are respectively at the upper and lower part, or the upper and middle part, or the middle and lower part of the retaining portion of the grounding terminal.

2. The shielded high-speed expansion bus connector according to claim 1, characterized in that: At the position where two grounding terminals are adjacent, the retaining parts of the two grounding terminals only contact one grounding plate, and the height positions are inconsistent; at one grounding terminal, the upper part, middle part or lower part of the retaining part of one grounding terminal contacts one grounding plate.

3. The shielded high-speed expansion bus connector according to claim 1, characterized in that: At a location where two grounding terminals are adjacent, the retaining portions of the two grounding terminals both contact the two grounding sheets; at one grounding terminal, the retaining portion of the grounding terminal contacts the two grounding sheets.

4. The shielded high-speed expansion bus connector according to claim 1, characterized in that: At the position where two grounding terminals are adjacent, the retaining portions of the two grounding terminals only contact one grounding sheet, and the height positions are inconsistent; at one grounding terminal, the retaining portion of the grounding terminal contacts two grounding sheets.

5. The shielded high-speed expansion bus connector according to claim 2, 3 or 4, characterized in that: The side piece includes an upper side, a lower side and a side connecting piece connecting the upper side and the lower side. The grounding piece contacting the upper part of the holding part is connected to the upper side, and the grounding piece contacting the lower part of the holding part is connected to the lower side.

6. The shielded high-speed expansion bus connector according to claim 5, characterized in that: There is a partition wall between the side receiving groove of the shielding member and the terminal accommodating hole. The grounding plate connected to the lower side is bent around the bottom of the partition wall and then extends into the terminal accommodating hole from the bottom of the terminal accommodating hole accommodating the grounding terminal to contact the retaining portion of the grounding terminal.

7. The shielded high-speed expansion bus connector according to claim 6, characterized in that: The grounding plate connected to the lower side includes a bending portion, which is located below the bottom of the partition wall. The outer end of the bending portion is connected to the lower side of the side plate. The inner end of the bending portion is bent upward and extends to form a contact arm. The inner surface of the upper end of the contact arm contacts the outer surface of the grounding terminal retaining portion. The bending portion of the grounding plate is located above the welding portion of the grounding terminal that contacts the contact arm of the grounding plate.

8. The shielded high-speed expansion bus connector according to claim 7, characterized in that: The contact arm includes an inclined section and a contact section, the lower end of the inclined section is connected to the inner end of the bending portion, the upper end of the inclined section is connected to the lower end of the contact section, the inner surface of the contact section contacts the outer surface of the holding portion of the grounding terminal, the lower end of the inclined section is away from the holding portion, and the lower end of the holding portion is bent outward and extended to form the welding portion.

9. The shielded high-speed expansion bus connector according to claim 5, characterized in that: A side connecting piece is arranged between the upper and lower sides of each side piece at a position corresponding to only one signal terminal; a side connecting piece and two openings are arranged between the upper and lower sides at positions corresponding to two adjacent metal terminals which are both grounding terminals G, the two grounding terminals correspond one to one to the two openings, and the side connecting piece is located between the two openings; an absorbing piece is arranged at positions corresponding to two adjacent terminals which are both signal terminals on the upper and lower sides, the absorbing piece is hollowed out in a ring shape, the width of the absorbing piece along the longitudinal direction of the shielding component does not exceed the spacing between the two opposite sides of the two signal terminals, the absorbing pieces on the upper and lower sides are not directly connected and conducted, but are indirectly connected and conducted through the upper side, the side connecting piece and the lower side, and a bottom connecting piece is arranged between the grounding pieces at adjacent positions of the two grounding terminals to connect the bottom piece and the side piece.

10. The shielded high-speed expansion bus connector according to claim 5, characterized in that: At least one end of the two ends of the bottom sheet in the longitudinal direction is provided with an end connecting sheet to connect the bottom sheet with the two side sheets.

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