Anti-interference structure of card edge connector terminal

Abstract

The invention discloses a card edge connector terminal anti-interference structure which is characterized in that two rows of terminals are symmetrically and fixedly mounted on two sides of a card slot of an insulating body, and two adjacent differential pair signal terminal groups in each row of terminals are separated by a grounding terminal; a grounding metal piece fixedly installed on the insulating body is provided with grounding antennas which can be in elastic contact conduction with the grounding terminals in each row of terminals, and a connecting part used for separating the grounding terminals of the differential pair signal terminal group is fixedly coated with a conductive plastic body. The insulation body is provided with a bottom grounding metal sheet accommodating groove corresponding to the card slot in position towards the circuit board, a bottom grounding metal sheet is fixedly accommodated in the bottom grounding metal sheet accommodating groove, and the upper side wall and the lower side wall of the bottom grounding metal sheet are respectively provided with grounding connecting sheets which are connected and conducted with the conductive plastic bodies on the grounding terminals. According to the invention, the anti-signal interference effect is good, the high-frequency requirement of a product can be better matched, and the required high-frequency effect is achieved.

Description

Technical Field

[0001] This invention relates to a connector, and more particularly to an anti-interference structure for the terminals of a snap-edge connector. Background Technology

[0002] Existing edge-mount connectors form signal terminal and ground terminal receiving slots within the insulating body. The signal and ground terminals are tightly inserted into these slots via retaining arms. The ground terminals are positioned on both sides of the paired differential signal terminals. A grounding housing is fixedly mounted on the upper outer side of the connector. Grounding is achieved through contact between the ground terminal and the elastic contact arm on the grounding housing, thus shielding against interference signals from the signal terminals. This traditional edge-mount connector structure offers poor shielding against interference signals and is insufficient for the high-frequency signal transmission performance required for edge-mount connectors. Summary of the Invention

[0003] To overcome the above deficiencies, the present invention provides an anti-interference structure for the terminal of a card edge connector. This anti-interference structure can improve the shielding effect against interference signals and improve the signal transmission stability and high-frequency transmission performance of the connector.

[0004] The technical solution adopted by this invention to solve its technical problem is: an anti-interference structure for a card edge connector terminal, including an insulating body, a grounding metal component, and terminals. The insulating body has a card slot extending along its long side. Two rows of terminals are symmetrically fixedly installed on both sides of the card slot of the insulating body. Each row of terminals includes several differential pair signal terminal groups composed of two rows of signal terminals and several ground terminals. Adjacent groups of differential pair signal terminal groups are separated by ground terminals. The grounding metal component is fixedly installed on the insulating body and has grounding antennas. The grounding antennas can elastically contact and conduct with the ground terminals in each row of terminals. The connecting portion of the ground terminals used to separate the differential pair signal terminal groups is fixedly covered with conductive plastic. A bottom grounding metal sheet is also provided. The insulating body has a bottom grounding metal sheet receiving groove corresponding to the card slot position facing the circuit board. The bottom grounding metal sheet is fixedly received in the bottom grounding metal sheet receiving groove. Grounding connecting pieces are respectively provided on the upper and lower side walls of the bottom grounding metal sheet, and the grounding connecting pieces are respectively connected and conduction-connected to the conductive plastic on each ground terminal.

[0005] As a further improvement of the present invention, the outer side of the connection portion of the two signal terminals of the differential pair signal terminal group is fixedly covered with an insulating plastic component.

[0006] As a further improvement of the present invention, the insulating body is provided with a first grounding terminal receiving groove and a first differential pair signal terminal group receiving groove on both sides of the card slot, respectively communicating with the card slot. The grounding terminal is inserted into the first grounding terminal receiving groove, and the outer side wall of the conductive plastic body is in close contact with the inner side of the first grounding terminal receiving groove. The grounding terminal is provided with a barb structure protruding from the outer side of the conductive plastic body, and the barb structure is embedded in the inner side wall of the first grounding terminal receiving groove. The differential pair signal terminal group is fixedly inserted into the first differential pair signal terminal group receiving groove, and the insulating plastic part is in close contact with the first differential pair signal terminal group receiving groove. The rear side of the insulating plastic part is stopped on the bottom grounding metal plate.

[0007] As a further improvement of the present invention, the rear side of the insulating plastic part is provided with a shielding plate insertion groove extending forward and backward, and the two side walls of the grounding metal sheet are also provided with a number of shielding plates bent forward. The shielding plates on the two side walls of the bottom grounding metal sheet are respectively inserted into each shielding plate insertion groove, and the shielding plates cover the surface of the connection part of the two rows of signal terminals facing the card slot.

[0008] As a further improvement of the present invention, the insulating body is provided with a second grounding terminal receiving groove and a second differential pair signal terminal group receiving groove on both sides of the card slot, which are connected to the card slot. The second grounding terminal receiving groove and the second differential pair signal terminal group receiving groove are connected to form an integral groove. The connecting parts of the grounding terminals on both sides of the differential pair signal terminal group are bridged together to form an L-shaped structure. The conductive plastic body covering the outside of the connecting parts of the bridged grounding terminals also forms an L-shaped structure. The insulating plastic part on the outside of the differential pair signal terminal group can be accommodated inside the L-shaped structure of the conductive plastic body. The differential pair signal terminal group and the grounding terminals on both sides are respectively inserted into the second differential pair signal terminal group receiving groove and the second grounding terminal receiving groove. The conductive plastic body and the insulating plastic part are in close contact with the inner sidewall of the terminal receiving groove. The grounding terminal is provided with a barb structure protruding from the outside of the conductive plastic body. The barb structure is embedded in the inner sidewall of the terminal receiving groove. The conductive plastic body can be stopped and connected to the insulating plastic body.

[0009] As a further improvement of the present invention, the structure in which the conductive plastic body can be stopped and connected with the insulating plastic body is as follows: the bottom surface of the L-shaped structure of the conductive plastic body is provided with a notch, the outer side wall of the insulating plastic part is provided with a protrusion, the protrusion on the outer side wall of the insulating plastic part can be inserted into the notch structure of the conductive plastic body, and the rear side wall of the notch stops on the rear side of the protrusion.

[0010] As a further improvement of the present invention, the grounding connection pieces on both sides of the bottom grounding metal sheet are spring-loaded structures formed by bending, and the grounding connection pieces elastically press against each conductive plastic body.

[0011] As a further improvement of the present invention, the grounding connecting pieces on both sides of the bottom grounding metal sheet are a plurality of forward-bent insert structures, and the conductive plastic body is provided with connecting piece insertion slots, and the grounding connecting pieces are inserted into each connecting piece insertion slot in a corresponding manner.

[0012] As a further improvement of the present invention, the bottom grounding metal sheet is provided with forward-bent retaining arms on both sides of the bottom grounding metal sheet, and a plurality of heat-melting holes are provided at intervals on the bottom grounding metal sheet. The bottom surface of the bottom grounding metal sheet receiving groove of the insulating body is provided with retaining holes and heat-melting pillars. The retaining arms on the bottom grounding metal sheet are tightly inserted into the retaining holes, and the retaining arms are provided with barbs that can be embedded in the side wall of the retaining holes. The heat-melting pillars on the insulating body can pass through the heat-melting holes on the bottom grounding metal sheet one by one, and the ends of the heat-melting pillars can be heat-melted and deformed to form radial convex rings that tightly abut against the bottom grounding metal sheet.

[0013] As a further improvement of the present invention, it also includes an outer metal shell covering the insulating body. The outer metal shell also forms a card-avoiding structure that is directly opposite to the card slot of the insulating body. The grounding metal component includes an upper grounding metal frame and a lower grounding metal sheet. The grounding contact is an upper contact spring formed on the upper grounding metal frame and a lower contact spring formed on the lower grounding metal sheet. The lower contact spring always elastically abuts against the connection surface of each grounding terminal. The upper contact spring is directly opposite the elastic contact arm of each grounding terminal. After an electronic card is inserted into the card slot, the elastic contact arm of each grounding terminal can elastically swing to make close contact with the upper contact spring for conduction.

[0014] The beneficial technical effects of this invention are as follows: By fixing and covering the outer side of the connection part of the grounding terminal with conductive plastic, and fixing and installing the grounding metal part and the bottom grounding metal plate on the outer side of the insulating body, the connection and conduction are achieved through the grounding terminal, the grounding metal part and the bottom grounding metal plate, and surrounding the differential pair signal terminal group around and below, the anti-signal interference effect is effectively improved, so that the connector has better high-frequency performance. The conductive plastic has the characteristic of absorbing electromagnetic waves, thus providing excellent shielding effect. Furthermore, the impedance of the conductive plastic can be adjusted according to the high-frequency characteristic requirements, so as to better match the high-frequency requirements of the product and achieve the required high-frequency effect. Attached Figure Description

[0015] Figure 1 This is an exploded perspective view of the present invention;

[0016] Figure 2 This is an assembly state diagram of the differential pair signal terminal group in the first structure of the present invention;

[0017] Figure 3This is a schematic diagram of the assembly state of the differential pair signal terminal group within the insulating body in the first structure of the present invention;

[0018] Figure 4 This is an assembly diagram of the grounding terminal in the first structure of the present invention;

[0019] Figure 5 This is a diagram showing the completed terminal assembly state in the first structure of the present invention;

[0020] Figure 6 This is a schematic diagram of the assembly of the grounding terminal within the insulating body in the first structure of the present invention;

[0021] Figure 7 This is a schematic diagram of the assembly of the differential pair signal terminal group within the insulating body in the first structure of the present invention;

[0022] Figure 8 This is an assembly diagram of the bottom grounding metal sheet in the first structure of this invention group;

[0023] Figure 9 This is a diagram showing the completed assembly of the bottom grounding metal sheet in the first structure of the present invention;

[0024] Figure 10 This is a diagram showing the contact state between the bottom grounding metal sheet and the conductive plastic body in the first structure of the present invention;

[0025] Figure 11 This is a perspective view of the first structure of the present invention;

[0026] Figure 12 This is a front view of the first structure of the present invention;

[0027] Figure 13 This is a schematic diagram illustrating the grounding principle of the first structure of the card insertion module of the present invention;

[0028] Figure 14 This is a schematic diagram illustrating the grounding principle of the first structure of the present invention after inserting the card;

[0029] Figure 15 This is a schematic diagram illustrating the interference signal shielding principle of the differential pair signal terminal group in the first structure of the present invention.

[0030] Figure 16 This is a perspective view of the grounding terminal of the first structure of the present invention;

[0031] Figure 17 This is a perspective view of the grounding terminal of the first structure of the present invention after plastic coating;

[0032] Figure 18 This is a front view of the grounding terminal of the first structure of the present invention after plastic coating;

[0033] Figure 19 for Figure 18 Sectional view along line AA;

[0034] Figure 20 This is a right view of the grounding terminal of the first structure of the present invention after it has been plastic-coated;

[0035] Figure 21 This is a perspective view of the differential pair signal terminal group of the first structure of the present invention;

[0036] Figure 22 This is a perspective view of the differential pair signal terminal group of the first structure of the present invention after plastic coating;

[0037] Figure 23 This is a front view of the differential pair signal terminal group of the first structure of the present invention after plastic wrapping;

[0038] Figure 24 This is a right view of the differential pair signal terminal group of the first structure of the present invention after plastic wrapping;

[0039] Figure 25 This is a diagram showing the assembly state of the grounding terminal in the second structure of the present invention;

[0040] Figure 26 This is an assembly diagram of the bottom grounding metal sheet in the second structure of the present invention;

[0041] Figure 27 This is a front view of the second structure of the present invention;

[0042] Figure 28 This is a schematic diagram illustrating the grounding principle of the second type of insert card in this invention;

[0043] Figure 29 This is a schematic diagram illustrating the grounding principle of the second type of card insertion in this invention;

[0044] Figure 30 This is a schematic diagram illustrating the positioning principle of the differential pair signal terminal group in the second structure of the present invention.

[0045] Figure 31 This is a schematic diagram illustrating the interference signal shielding principle of the differential pair signal terminal group in the second structure of the present invention.

[0046] Figure 32 This is a front view of the grounding terminal connecting strip of the second structure of the present invention;

[0047] Figure 33 This is a front view of the grounding terminal of the second structure of the present invention after plastic coating and connecting strip;

[0048] Figure 34 This is a perspective view of the grounding terminal of the second structure of the present invention after plastic coating;

[0049] Figure 35This is a front view of the grounding terminal of the second structure of the present invention after plastic coating;

[0050] Figure 36 This is a right view of the grounding terminal of the second structure of the present invention after it has been plastic-coated;

[0051] Figure 37 This is a state diagram for the use of the present invention. Detailed Implementation

[0052] To make the advantages, technical solutions, and innovations of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the protection scope of this invention.

[0053] Example: An anti-interference structure for a snap-fit ​​connector terminal includes an insulating body 1, a grounding metal component, and terminals 3. The insulating body 1 has a slot 11 extending along its long side. Two rows of terminals 3 are symmetrically fixedly installed on both sides of the slot 11 of the insulating body 1. Each row of terminals 3 includes several differential pair signal terminal groups 3 composed of two rows of signal terminals 31 and several grounding terminals 32. Adjacent groups of differential pair signal terminals 31 are separated by grounding terminals 32. The grounding metal component is fixedly installed on the insulating body 1 and has grounding contacts that can contact each row of terminals. The grounding terminal 32 in terminal 3 is elastically contacted and conductive. The connection part of the grounding terminal 32 used to separate the differential pair signal terminal 3 groups is fixedly covered with conductive plastic body 321. It is also provided with bottom grounding metal plate 4. The insulating body 1 is provided with bottom grounding metal plate receiving groove 12 corresponding to the position of the card slot 11 facing the circuit board. The bottom grounding metal plate 4 is fixedly accommodated in the bottom grounding metal plate receiving groove 12. Grounding connecting pieces are provided on the upper and lower side walls of the bottom grounding metal plate 4 respectively. The grounding connecting pieces are respectively connected and conductive to the conductive plastic body 321 on each grounding terminal 32.

[0054] The grounding terminal 32, the grounding metal piece, and the bottom grounding metal piece 4 are connected and connected, and surround the differential pair signal terminals 3 around and below, which effectively improves the anti-signal interference effect and makes the connector have better high-frequency performance. The conductive plastic has the characteristics of absorbing electromagnetic waves and providing excellent shielding effect. The impedance of the conductive plastic can also be adjusted according to the high-frequency characteristics requirements, so as to better match the high-frequency performance requirements of the product and achieve the required high-frequency effect.

[0055] An insulating plastic component 311 is fixedly wrapped around the outer side of the connection portion of the two signal terminals 3 of the differential pair signal terminal group 3. The connection portion between the conductive plastic body 321 and the grounding terminal 32, and the connection portion between the insulating plastic component 311 and the differential pair signal terminal group 3 are all integrally molded structures by in-mold injection molding. The signal terminal 3 is preferably a structure of metal strips that have been bent multiple times. It has a signal solder foot 3101, a signal connection portion 3102, and a signal elastic contact portion 3103 in sequence. The signal connection portion forms a stepped structure through a change in width, thereby forming a stable connection with the insulating plastic component 311. The grounding terminal 32 is preferably a sheet metal blanking forming structure. Its vertical dimension is larger than that of the signal terminal 3, which plays an anti-interference role. It has a grounding solder foot 3201, a grounding connection portion 3202, and a grounding elastic contact portion 3203 in sequence. The grounding connection portion preferably has a through hole. During in-mold injection molding, the conductive plastic can enter the through hole to achieve a stable connection between the conductive plastic body 321 and the grounding connection portion.

[0056] The insulating body 1 is provided with a first grounding terminal receiving groove 13 and a first differential pair signal terminal group receiving groove 14 on both sides of the card slot 11, respectively communicating with the card slot 11. The grounding terminal 32 is inserted into the first grounding terminal receiving groove 13, and the outer side wall of the conductive plastic body 321 is in close contact with the inner side of the first grounding terminal receiving groove 13. The grounding terminal 32 is provided with a barb structure protruding from the outer side of the conductive plastic body 321, and the barb structure is embedded in the inner side wall of the first grounding terminal receiving groove 13. The differential pair signal terminal group 3 is fixedly inserted into the first differential pair signal terminal group receiving groove 14, and the insulating plastic part 311 is in close contact with the first differential pair signal terminal group receiving groove 14. The rear side of the insulating plastic part 311 is stopped on the bottom grounding metal plate 4. The first type of grounding terminal 32 is a split structure. Each grounding terminal 32 is located on both sides of a group of differential signal terminals 3. The grounding terminal 32 and the first grounding terminal receiving groove 13 are fixed and positioned by close contact and barbs. The group of differential signal terminals 3 and the first differential signal terminal receiving groove 14 are fixed and positioned by close contact and the blocking of the bottom grounding metal plate 4.

[0057] The insulating plastic part 311 has a shielding plate 43 insertion slot 3111 extending forward and backward on its rear side. The side walls of the grounding metal piece also have several forward-bent shielding plates 43. The shielding plates 43 on the side walls of the bottom grounding metal piece 4 are respectively inserted into the respective shielding plate 43 insertion slots 3111, and the shielding plates 43 cover the surface of the connection portion of the two rows of signal terminals 31 facing the insertion slot 11. The shielding plates 43 on the upper and lower side walls of the grounding metal piece are inserted into the shielding plate 43 insertion slots 3111 on the rear side of the insulating plastic part 311. This serves two purposes: firstly, it stops and positions the differential pair signal terminals 3 groups in the forward and backward direction; secondly, it covers the connection portion of the differential pair signal terminals 3 groups, achieving an interference signal shielding effect.

[0058] The insulating body 1 has a second grounding terminal receiving groove 15 and a second differential pair signal terminal group receiving groove 16 on both sides of the card slot 11, which are connected to the card slot 11. The second grounding terminal receiving groove 15 and the second differential pair signal terminal group receiving groove 16 are connected to form an integral groove. The connecting parts of the grounding terminals 32 on both sides of the differential pair signal terminal group 3 are bridged together to form an L-shaped structure. The conductive plastic body 321 covering the outside of the connecting parts of the bridged grounding terminals 32 also forms an L-shaped structure. The insulating plastic part 311 on the outside of the differential pair signal terminal group 3 is... The differential signal terminal group 3 and the grounding terminals 32 on both sides are respectively inserted into the second differential signal terminal group receiving groove 16 and the second grounding terminal receiving groove 15. The conductive plastic body 321 and the insulating plastic part 311 are in close contact with the inner wall of the terminal 3 receiving groove. The grounding terminal 32 is provided with a barb structure protruding from the outside of the conductive plastic body 321. The barb structure is embedded in the inner wall of the terminal 3 receiving groove. The conductive plastic body 321 can be stopped and connected to the insulating plastic body. The second structure designs the grounding terminals 32 located on both sides of the differential pair signal terminal group 3 as an integrated structure. The connection part of the two grounding terminals 32 is bridged together to form an L-shaped structure. After covering the conductive plastic body 321, a space is formed on the conductive plastic body 321 to accommodate the insulating plastic part 311 of the differential pair signal terminal group 3. During assembly, the differential pair signal terminal group 3 is first tightly inserted into the second differential pair signal terminal group receiving groove 16, and then the integrated grounding terminal 32 is tightly inserted into the receiving groove of the two grounding terminals 32. The conductive plastic body 321 on the grounding terminal 32 and the insulating plastic part 311 of the differential pair signal terminal group are stopped and positioned. At the same time, the grounding terminal 32 is fixed and positioned with the insulating body 1 by barbs. The conductive plastic body 321 can also be "U" shaped and covered on the outside of the insulating plastic part 311.

[0059] The conductive plastic body 321 has a stop connection with the insulating plastic body as follows: the bottom surface of the L-shaped structure of the conductive plastic body 321 has a notch 3211, and the outer side wall of the insulating plastic part 311 has a protrusion 3112. The protrusion 3112 on the outer side wall of the insulating plastic part 311 can be inserted into the notch 3211 structure of the conductive plastic body 321, and the rear side wall of the notch 3211 stops against the rear side of the protrusion 3112. When assembling the grounding terminal 32, after the grounding terminal 32 is inserted, the protrusion 3112 on the outer side wall of the insulating plastic part 311 of the differential pair signal terminal 3 will be inserted into the notch 3211 on the conductive plastic, and then the bottom surface of the notch 3211 will abut against the protrusion 3112, preventing the differential pair signal terminal 3 from retracting.

[0060] The grounding connection pieces on both sides of the bottom grounding metal sheet 4 are spring-loaded structures 41 formed by bending, and the grounding connection pieces elastically press against each conductive plastic body 321. By bending the bottom grounding metal sheet 4 to form the spring-loaded structure 41, the grounding connection pieces use their elasticity to make close contact with the conductive plastic body 321, thereby realizing the electrical connection and conduction between the bottom grounding metal sheet 4 and the grounding terminal 32.

[0061] The grounding connecting pieces on both sides of the bottom grounding metal sheet 4 are several forward-bent insert structures 42. The conductive plastic body 321 is provided with connecting piece insertion slots 3212, and the grounding connecting pieces are inserted one-to-one into each connecting piece insertion slot 3212. By bending the bottom grounding metal sheet 4 to form the insert structure 42, and inserting it into the connecting piece insertion slot 3212 of the conductive plastic body 321, the bottom grounding metal sheet 4 and the grounding terminal 32 are electrically connected and connected.

[0062] The bottom grounding metal sheet 4 has forward-bent retaining arms 44 on both sides of its side walls. The bottom grounding metal sheet 4 also has several heat-melting holes 45 spaced apart. The bottom surface of the bottom grounding metal sheet receiving groove 12 of the insulating body 1 has retaining holes 17 and heat-melting pillars 18. The retaining arms 44 on the bottom grounding metal sheet 4 are tightly inserted into the retaining holes 17, and the retaining arms 44 are provided with barbs that can be embedded in the side walls of the retaining holes 17. The heat-melting pillars 18 on the insulating body 1 can pass through the heat-melting holes 45 on the bottom grounding metal sheet 4 one by one, and the ends of the heat-melting pillars 18 can be heat-melted and deformed to form radial protrusions that tightly abut against the bottom grounding metal sheet 4. The bottom grounding metal piece 4 is connected to the retaining hole 17 and the heat fusion post 18 on the rear side of the insulating body 1 through the retaining arms 44 at both ends and the heat fusion hole 45 in the middle. After the heat fusion post 18 is heat-fused, it is tightly combined with the bottom grounding metal piece 4, ensuring that the bottom grounding metal piece 4 will not be deformed, thereby ensuring its stable connection and conduction with the conductive plastic body 321.

[0063] It also includes an outer metal shell 2 covering the insulating body 1. The outer metal shell 2 also forms a card insertion avoidance structure that is directly opposite to the card insertion slot 11 of the insulating body 1. The grounding metal component includes an upper grounding metal frame 210 and a lower grounding metal sheet 220. The grounding contact is an upper contact spring 21 formed on the upper grounding metal frame 210 and a lower contact spring 22 formed on the lower grounding metal sheet 220. The lower contact spring 22 always elastically abuts against the connection surface of each grounding terminal 32. The upper contact spring 21 is directly opposite to the elastic contact arm of each grounding terminal 32. After an electronic card is inserted into the card insertion slot 11, the elastic contact arm of each grounding terminal 32 can elastically swing to make close contact with the upper contact spring 21 for conduction.

[0064] The lower contact spring 22 is always in close contact with the grounding terminal 32 for conduction. The upper contact spring 21 does not contact the contact arm of the grounding terminal 32 when no electronic card is inserted. When the electronic card is inserted, the contact arm of the grounding terminal 32 swings elastically, and the upper contact spring 21 and the contact arm of the grounding terminal 32 then make close contact for conduction. This avoids excessive wear from inserting and removing the electronic card and also ensures that the connector has a good grounding effect when transmitting signals.

Claims

1. An anti-interference structure for a snap-fit ​​connector terminal, comprising an insulating body (1), a grounding metal component, and terminals (3), wherein the insulating body has a slot (11) extending along its long side, and two rows of terminals are symmetrically fixedly installed on both sides of the slot of the insulating body, each row of terminals includes several differential pair signal terminal groups composed of two rows of signal terminals (31) and several ground terminals (32), adjacent groups of differential pair signal terminal groups are separated by ground terminals, the grounding metal component is fixedly installed on the insulating body, and the grounding metal component is provided with grounding contact angles, the grounding contact angles being able to elastically contact and conduct with the ground terminals in each row of terminals, characterized in that: The connection part of the grounding terminal used to separate the differential pair signal terminal group is fixedly covered with conductive plastic body (321), and is also provided with bottom grounding metal plate (4). The insulating body is provided with bottom grounding metal plate receiving groove (12) corresponding to the position of the card slot facing the circuit board. The bottom grounding metal plate is fixedly accommodated in the bottom grounding metal plate receiving groove. Grounding connection pieces are provided on the upper and lower side walls of the bottom grounding metal plate respectively. The grounding connection pieces are respectively connected and conductive to the conductive plastic body on each grounding terminal.

2. The anti-interference structure of the card edge connector terminal according to claim 1, characterized in that: An insulating plastic component (311) is fixedly wrapped around the outside of the connection portion of the two signal terminals of the differential pair signal terminal group.

3. The anti-interference structure of the card edge connector terminal according to claim 2, characterized in that: The insulating body is provided with a first grounding terminal receiving groove (13) and a first differential pair signal terminal group receiving groove (14) on both sides of the card slot. The grounding terminal is inserted into the first grounding terminal receiving groove, and the outer wall of the conductive plastic body is in close contact with the inner side of the first grounding terminal receiving groove. The grounding terminal is provided with a barb structure protruding from the outer side of the conductive plastic body. The barb structure is embedded in the inner wall of the first grounding terminal receiving groove. The differential pair signal terminal group is fixedly inserted into the first differential pair signal terminal group receiving groove, and the insulating plastic part is in close contact with the first differential pair signal terminal group receiving groove. The rear side of the insulating plastic part is stopped on the bottom grounding metal plate.

4. The anti-interference structure of the card edge connector terminal according to claim 3, characterized in that: The insulating plastic part has a shielding plate insertion groove (3111) extending forward and backward on the rear side. The grounding metal sheet has several shielding plates (43) bent forward on both sides. The shielding plates on both sides of the bottom grounding metal sheet are inserted into each shielding plate insertion groove one by one, and the shielding plates cover the surface of the connection part of the two rows of signal terminals facing the insertion slot.

5. The anti-interference structure for the card edge connector terminal according to claim 2, characterized in that: The insulating body is provided with a second grounding terminal receiving groove (15) and a second differential pair signal terminal group receiving groove (16) on both sides of the card slot. The second grounding terminal receiving groove and the second differential pair signal terminal group receiving groove are connected to form an integral groove. The connecting parts of the grounding terminals on both sides of the differential pair signal terminal group are bridged together to form an L-shaped structure. The conductive plastic body covering the outside of the connecting parts of the bridged grounding terminals also forms an L-shaped structure. The insulating plastic part on the outside of the differential pair signal terminal group can be accommodated inside the L-shaped structure of the conductive plastic body. The differential pair signal terminal group and the grounding terminals on both sides are respectively inserted into the second differential pair signal terminal group receiving groove and the second grounding terminal receiving groove. The conductive plastic body and the insulating plastic part are in close contact with the inner sidewall of the terminal receiving groove. The grounding terminal is provided with a barb structure protruding from the outside of the conductive plastic body. The barb structure is embedded in the inner sidewall of the terminal receiving groove. The conductive plastic body can be stopped and connected to the insulating plastic body.

6. The anti-interference structure for the card edge connector terminal according to claim 5, characterized in that: The structure that allows the conductive plastic body to be stopped and connected to the insulating plastic body is as follows: the bottom surface of the L-shaped structure of the conductive plastic body is provided with a notch (3211), and the outer side wall of the insulating plastic part is provided with a protrusion (3112). The protrusion on the outer side wall of the insulating plastic part can be inserted into the notch structure of the conductive plastic body, and the rear side wall of the notch stops on the rear side of the protrusion.

7. The anti-interference structure for the card edge connector terminal according to claim 1, characterized in that: The grounding connection pieces on both sides of the bottom grounding metal sheet are spring-loaded structures (41) formed by bending, and the grounding connection pieces elastically press against each conductive plastic body.

8. The anti-interference structure of the card edge connector terminal according to claim 1, characterized in that: The grounding connecting pieces on both sides of the bottom grounding metal sheet are several forward-bent insert structures (42). The conductive plastic body is provided with connecting piece insertion slots (3212), and the grounding connecting pieces are inserted into each connecting piece insertion slot in a corresponding manner.

9. The anti-interference structure of the card edge connector terminal according to claim 1, characterized in that: The bottom grounding metal sheet has forward-bent retaining arms (44) on both sides of its sidewalls. The bottom grounding metal sheet also has several heat-melting holes (45) spaced apart. The bottom surface of the bottom grounding metal sheet receiving groove of the insulating body has retaining holes (17) and heat-melting pillars (18). The retaining arms on the bottom grounding metal sheet are tightly inserted into the retaining holes, and the retaining arms are provided with barbs that can be embedded in the sidewalls of the retaining holes. The heat-melting pillars on the insulating body can pass through the heat-melting holes on the bottom grounding metal sheet one by one, and the ends of the heat-melting pillars can be heat-melted and deformed to form radial protrusions that tightly abut against the bottom grounding metal sheet.

10. The anti-interference structure for the edge connector terminal according to claim 1, characterized in that: It also includes an outer metal shell (2) covering the insulating body. The outer metal shell also forms a card avoidance structure that is directly opposite to the card slot of the insulating body. The grounding metal component includes an upper grounding metal frame (210) and a lower grounding metal sheet (220). The grounding contact is an upper contact spring (21) formed on the upper grounding metal frame and a lower contact spring (22) formed on the lower grounding metal sheet. The lower contact spring always elastically presses against the connection surface of each grounding terminal. The upper contact spring is directly opposite the elastic contact arm of each grounding terminal. After the electronic card is inserted into the card slot, the elastic contact arm of each grounding terminal can elastically swing and make close contact with the upper contact spring to conduct electricity.

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