Electrical connector

Abstract

The application discloses an electric connector, comprising: a plurality of pre-press terminals, each pre-press terminal having a main body part, an elastic arm, an elastic contact part and a pre-press part extending forward from the main body part in sequence; at least one metal body, having at least one wall, the wall having a first metal wall, a second metal wall and a third metal wall, the third metal wall being in front of the pre-press part and connecting the first metal wall and the second metal wall, the second metal wall having a limiting part, the pre-press part being between the first metal wall and the limiting part; wherein, before the electric connector and the mating connector are plugged, the pre-press part abuts the inner side of the limiting part; after the plugging is completed, the pre-press part is separated from the limiting part. The application can pre-press the pre-press terminal through the metal body, reduce the probability of damage of the limiting part, more effectively keep the elastic contact parts of the plurality of pre-press terminals at the same height position, and reduce the signal interference generated by the pre-press terminal to the outside.

Description

Technical Field

[0001] This invention relates to an electrical connector, and more particularly to an electrical connector that pre-compresses multiple conductive terminals and reduces external radiated interference signals. Background Technology

[0002] A conventional electrical connector is known for mating with a mating connector. The connector includes an insulating shell and a plurality of conductive terminals arranged in a row, each conductive terminal having a resilient contact portion. Since the resilient contact portion is flexible and deformable within a certain range, pre-compression is applied to the plurality of conductive terminals to maintain them at the same height position, thus avoiding poor contact or obstruction of mating of the mating connector. Therefore, multiple stops are typically provided in the insulating shell to restrict the position of the conductive terminals adjacent to the resilient contact portion, achieving the purpose of pre-compressing the plurality of conductive terminals. For example, CN200810135622.X, CN201310583508.4, and TWM551357U all pre-compress one end of the conductive terminal extending towards the mating connector onto the insulating shell.

[0003] However, the stop portion of the insulating shell is prone to deformation due to uneven heat dissipation during the molding process of the insulating shell, or to being bumped and scraped by the end of the conductive terminal during the insertion of the conductive terminal into the insulating shell, or to being broken during the molding and demolding process, which makes the stop portion easily damaged and fails to achieve the expected pre-pressure on the conductive terminal.

[0004] Therefore, it is necessary to design a new electrical connector to overcome the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an electrical connector that uses a limiting part on the metal body to pre-compress the pre-compressed terminals, eliminating problems such as uneven heat dissipation of the limiting part due to insulation material, scratch damage, or breakage during demolding. This reduces the probability of damage to the limiting part and more effectively keeps the elastic contact parts of multiple pre-compressed terminals at the same height, reducing the risk of poor contact or inability to mate with the mating connector. Furthermore, the first, second, and third metal walls of the metal body can form a shielding space, which can provide signal shielding for a short stub of wire formed from the contact point to the free end of the pre-compressed terminal, reducing signal interference generated by this short stub.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an electrical connector for forward insertion into a mating connector, comprising: a plurality of conductive terminals, including a plurality of pre-compression terminals, each pre-compression terminal having a main body and an elastic arm, an elastic contact portion, and a pre-compression portion extending forward sequentially from the main body; the elastic contact portions of the plurality of pre-compression terminals being arranged in a row along the left-right direction, and the elastic contact portions being used to contact the mating connector in the up-down direction; at least one metal body forming at least one wall, the wall having a first metal wall, a second metal wall, and a third metal wall, the inner sides of the first metal wall and the inner sides of the second metal wall facing each other along the up-down direction. Furthermore, the third metal wall is positioned at intervals, located in front of the pre-compression portion and connecting the first metal wall and the second metal wall. The second metal wall has a limiting portion located in front of the elastic contact portion. The pre-compression portion is located between the first metal wall and the limiting portion along the vertical direction. Before the electrical connector and the mating connector are inserted, the elastic contact portion exposes the metal body and protrudes from the limiting portion in a direction away from the first metal wall, and the pre-compression portion abuts against the inner side of the limiting portion. After the electrical connector and the mating connector are inserted, the elastic contact portion moves towards the first metal wall, and the pre-compression portion separates from the limiting portion.

[0007] Furthermore, the plurality of pre-compression terminals include at least one grounding terminal, the grounding terminal having an abutment portion extending from its pre-compression portion toward the first metal wall; wherein, before the electrical connector and the mating connector are inserted, the abutment portion is separated from the first metal wall, and after the electrical connector and the mating connector are inserted, the abutment portion abuts against the inner side of the first metal wall.

[0008] Furthermore, the second metal wall is provided with a first shielding portion located behind the limiting portion. The limiting portion and the first shielding portion are spaced apart by an opening along the front-back direction. The elastic contact portion protrudes from the opening to contact the mating connector. Before the electrical connector and the mating connector are inserted, the first shielding portion and the elastic arm are arranged facing each other and spaced apart along the up-down direction. After the electrical connector and the mating connector are inserted, the elastic arm is displaced in a direction away from the first shielding portion.

[0009] Furthermore, the plurality of preload terminals include at least one signal terminal, and the electrical connector further includes an insulating block covering and fixed outside the main body portion of the signal terminal; the second metal wall is provided with a stop portion located behind the elastic contact portion and a second shield portion located behind the stop portion, the second shield portion being connected to the stop portion and displaced relative to the limiting portion in a direction away from the first metal wall, the stop portion and the second shield portion forming a clearance space, and a portion of the insulating block extending into the clearance space.

[0010] Furthermore, the elastic arm of the signal terminal has an exposed portion extending forward beyond the insulating block; the second metal wall is provided with a first shielding portion located behind the limiting portion, the limiting portion and the first shielding portion being spaced apart by an opening along the front-rear direction, the elastic contact portion protruding from the opening to contact the mating connector, the exposed portion and the first shielding portion facing each other along the vertical direction, and along the vertical direction, the distance between the main body portion and the second shielding portion is greater than the distance between the exposed portion and the first shielding portion.

[0011] Furthermore, the second metal wall also has a stop portion connecting the first shielding portion and the second shielding portion. The insulating block has a body covering the main body and a first extension portion and a second extension portion extending forward from the block body. The elastic arm of the signal terminal is located between the first extension portion and the second extension portion along the vertical direction. The first extension portion is close to the first metal wall relative to the second extension portion. The first extension portion extends forward beyond the second extension portion. The second extension portion stops at the stop portion.

[0012] Furthermore, the insulating block has a body having two outer surfaces facing the first metal wall and the second shielding portion respectively. The insulating block also has at least one support post protruding from at least one of the outer surfaces of the block body. The support post abuts against the inner side of the first metal wall or the inner side of the second shielding portion. The inner side of the first metal wall or the inner side of the second shielding portion and the outer surface facing it are spaced apart.

[0013] Furthermore, the plurality of conductive terminals include multiple pairs of signal terminals and multiple ground terminals arranged alternately along the left-right direction, and the metal body is also provided with multiple metal partitions, which are located between adjacent ground terminals and signal terminals along the left-right direction.

[0014] Furthermore, the plate surface of the main body of the grounding terminal faces the left and right direction, and the main body of the grounding terminal is provided with at least two protrusions. The two protrusions protrude toward the two metal partition walls adjacent to the grounding terminal, and the two protrusions contact the two metal partition walls respectively.

[0015] Furthermore, the plurality of conductive terminals are arranged in at least two rows, each row of conductive terminals includes a plurality of pre-compressed terminals arranged along the left-right direction, the metal body includes two walls that respectively house the two rows of conductive terminals, the metal body has a plug cavity, the plug cavity is located between the front ends of the two walls along the up-down direction and is used to house the mating connector, the elastic contact portions of the two rows of conductive terminals are arranged facing each other along the up-down direction and protrude toward the plug cavity; the metal body includes a first metal body and two second metal bodies for forming the two walls together, the two second metal bodies are respectively fixed to the upper and lower sides of the first metal body, the first metal walls of the two walls are respectively disposed on the two second metal bodies, the second metal walls of the two walls are both disposed on the first metal body, and the third metal walls of the two walls are disposed on the first metal body or respectively disposed on the two second metal bodies.

[0016] Furthermore, the first metal body has a stop portion behind the insertion cavity for blocking the mating connector. A portion of the second metal wall of the two walls merges to form a second shield portion. The second shield portion is located behind the stop portion and connected to the stop portion at the middle position in the vertical direction. The second shield portion and the stop portion together form two clearance spaces located on both sides of the second shield portion. Each row of multiple conductive terminals includes multiple pairs of signal terminals for transmitting differential signals. The main body of each pair of signal terminals is covered by an insulating block. The two clearance spaces are respectively located within the insulating blocks in the two walls. The second shield portion extends from the stop portion along the overall length of the main body of the signal terminal.

[0017] Furthermore, each of the insulating blocks has a plurality of support posts spaced apart in its extending direction and protruding toward the second shielding portion, the second shielding portion being held between the support posts of the insulating blocks on both sides.

[0018] Furthermore, the signal terminal also includes a conductive portion extending from the main body of the signal terminal, the conductive portion of the signal terminal extending out of the insulating block, and at least one of the support posts of the insulating block being adjacent to the conductive portion of the signal terminal along the extending direction of the signal terminal.

[0019] Furthermore, the second metal wall is provided with a first shielding portion located behind the limiting portion. The limiting portion and the first shielding portion are spaced apart by an opening along the front-rear direction. The elastic contact portion protrudes from the opening to contact the mating connector. The plurality of pre-compression terminals include at least one signal terminal. The elastic arm of the signal terminal and the first shielding portion are arranged facing each other. The operating wavelength of the signal transmitted by the signal terminal is defined as λ. The length of the first shielding portion extending along the front-rear direction is between 0.25λ and 0.5λ.

[0020] Furthermore, the plurality of pre-compression terminals include at least one signal terminal, and the electrical connector further includes an insulating block that covers and is fixed to the signal terminal. The insulating block has a body covering the main body and a first extension and a second extension extending forward from the block body. The elastic arm of the signal terminal is located between the inner side of the first extension and the inner side of the second extension in the vertical direction. The first extension is closer to the first metal wall than the second extension. Before the electrical connector and the mating connector are mated, there is a gap between the inner side of the first extension and the elastic arm of the signal terminal. The inner side of the second extension extends obliquely toward the second metal wall.

[0021] Compared with the prior art, the electrical connector provided by the present invention has the following beneficial effects:

[0022] This application, through the limiting portion of the metal body, allows the pre-pressed portions of multiple pre-pressed terminals to be pre-pressed onto the limiting portion before the mating connector is inserted into the electrical connector. This pre-pressure limits the height of the elastic contact portions of the multiple pre-pressed terminals, ensuring that the multiple elastic contact portions are kept at roughly the same horizontal height. Furthermore, compared to pre-pressing multiple pre-pressed terminals through an insulating shell, this application uses the metal body to pre-press the terminals, avoiding problems such as uneven heat dissipation of the insulating material, scratch damage, or breakage during demolding. This reduces the likelihood of damage to the limiting portion and more effectively prevents poor contact or hinders smooth mating of the mating connector and electrical connector due to large height differences among the multiple elastic contact portions. After the mating connector is mated, the elastic contact portions can elastically deform under the contact resistance of the mating connector, allowing the pre-pressed portions to separate from the limiting portion. Furthermore, a short stub is formed between the contact point of the elastic contact portion and the free end of the pre-compression terminal, and this stub emits a magnetic field. Especially for pre-compression terminals where the free end is not conductive, this stub will exhibit a "staking effect," resulting in even greater signal interference. Therefore, this application can also utilize the shielding space formed by the first, second, and third metal walls of the metal body to provide signal shielding for this short stub, reducing the signal interference it generates. In summary, the technical solution of this application can both pre-compress multiple pre-compression terminals using the metal body to maintain the elastic contact portions of the multiple pre-compression terminals at the same height and provide signal shielding for the short stub formed by the pre-compression terminals, reducing interference to the outside world. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the electrical connector according to the first embodiment of the present invention;

[0024] Figure 2 This is an exploded view of the electrical connector according to the first embodiment of the present invention;

[0025] Figure 3 This is an exploded view of one of the transmission modules in the electrical connector of the first embodiment of the present invention;

[0026] Figure 4 This is a three-dimensional schematic diagram of a pair of signal terminals and an insulating block in an electrical connector according to the first embodiment of the present invention;

[0027] Figure 5 This is a perspective view of a pair of signal terminals and an insulating block in an electrical connector according to the first embodiment of the present invention.

[0028] Figure 6This is a front-to-back plan view of one of the transmission modules in the electrical connector according to the first embodiment of the present invention;

[0029] Figure 7 In the first embodiment of the present invention, before the electrical connector mates with the mating connector, one of the transmission modules travels along... Figure 6 A cross-sectional view along line AA;

[0030] Figure 8 This is a cross-sectional view of one of the transmission modules at the signal terminal after the electrical connector of the first embodiment of the present invention has been mated with the mating connector;

[0031] Figure 9 for Figure 8 An enlarged view of part B in the image;

[0032] Figure 10 This is a three-dimensional schematic diagram of a grounding terminal in an electrical connector according to the first embodiment of the present invention;

[0033] Figure 11 In the first embodiment of the present invention, before the electrical connector mates with the mating connector, one of the transmission modules travels along... Figure 6 A cross-sectional view of the CC line;

[0034] Figure 12 This is a cross-sectional view of one of the transmission modules at the grounding terminal after the electrical connector of the first embodiment of the present invention has been mated with the mating connector;

[0035] Figure 13 One of the transmission modules in the first embodiment of the present invention is along Figure 6 A partial three-dimensional sectional view cut by the DD line;

[0036] Figure 14 One of the transmission modules in the first embodiment of the present invention is along Figure 6 A partial three-dimensional sectional view cut by the EE line;

[0037] Figure 15 This is a partial cross-sectional view of one of the transmission modules of the first embodiment of the present invention, cut along a plane perpendicular to the front-back direction;

[0038] Figure 16 This is a three-dimensional schematic diagram of a grounding terminal in an electrical connector according to a second embodiment of the present invention;

[0039] Figure 17 This is a cross-sectional plan view of one of the transmission modules of the electrical connector according to the second embodiment of the present invention at the grounding terminal.

[0040] Explanation of reference numerals in the accompanying drawings for the specific implementation methods:

[0041] Detailed Implementation

[0042] To facilitate a better understanding of the purpose, structure, features, and effects of this invention, the invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0043] To facilitate a better understanding of the technical solution of this invention, in the accompanying drawings, the X-axis of the three-dimensional coordinate axes is defined as the left-right direction, the Y-axis as the front-back direction, and the Z-axis as the up-down direction, with each of the X-axis, Y-axis, and Z-axis being perpendicular to the others.

[0044] Please see Figures 1 to 3 This is an electrical connector 100 provided in the first embodiment of the present invention, used to mate with a mating connector 200 and mounted on a circuit board (not shown, the same below). The electrical connector 100 includes an insulating body 1, two transmission modules T, and a rear plug 2. The two transmission modules T are housed within the cavity 11 of the insulating body 1. Each transmission module T includes a metal body 3 and a plurality of conductive terminals 4, wherein the plurality of conductive terminals 4 are housed within the metal body 3. The rear plug 2 is assembled to the rear side of the insulating body 1 and attached to the outer surface of the transmission module T. In this embodiment, an insulating partition 12 is provided in front of the insulating body 1 to isolate the front of the metal bodies 3 of the two transmission modules T. Of course, in other embodiments, the two metal bodies 3 can be electrically connected by conductive plastic or the like. The plurality of conductive terminals 4 are arranged in four rows, and each row of conductive terminals 4 is arranged along the left-right direction X.

[0045] Please see Figure 3For any one of the transmission modules T, its metal body 3 forms two walls 31, and the front end of each metal body 3 has a plug-in cavity 32, which is located between the front ends of the two walls 31 along the vertical direction Z. Each wall 31 has a first metal wall 35, a second metal wall 36, a third metal wall 37, and a plurality of metal partition walls 38. The inner sides of the first metal wall 35 and the inner sides of the second metal wall 36 are arranged facing each other and spaced apart along the vertical direction Z. The third metal wall 37 is located at the front end of the metal body 3 and connects the first metal wall 35 and the second metal wall 36. Each metal partition wall 38 is located between the first metal wall 35 and the second metal wall 36. The plurality of metal partition walls 38 divide the wall 31 into a plurality of receiving cavities to receive the corresponding conductive terminals 4. In this embodiment, each of the receiving cavities is formed by the first metal wall 35, the second metal wall 36, the third metal wall 37, and the metal partition wall 38. Of course, in other embodiments, the wall 31 may not be provided with the metal partition wall 38. Thus, the wall 31 forms one or more receiving cavities by the first metal wall 35, the second metal wall 36, and the third metal wall 37, and the multiple conductive terminals 4 and / or the conductive terminals 4 and the metal body 3 may be electrically isolated from each other as needed by insulating material.

[0046] Please see Figure 3 , Figure 6 and Figure 7 For each of the wall sections 31, the second metal wall 36 includes a limiting portion 361, a first shielding portion 363 located behind the limiting portion 361, a second shielding portion 365 located behind the first shielding portion 363, an opening 362 that separates the limiting portion 361 and the first shielding portion 363 in the front-rear direction Y, and a stop portion 364 connecting the first shielding portion 363 and the second shielding portion 365. The second shielding portion 365 is connected to the stop portion 364 and is displaced relative to the limiting portion 361 in a direction away from the first metal wall 35. The stop portion 364 and the second shielding portion 365 form a clearance space 39. In this embodiment, the first shielding portion 363 and the limiting portion 361 are located at the same height in the vertical direction Z, and both are located at different heights from the second shielding portion 365; in other embodiments, the first shielding portion 363 and the limiting portion 361 may also be located at different heights.

[0047] Please see Figure 2 and Figure 3In this embodiment, each metal body 3 includes a first metal body 33 and two second metal bodies 34 for forming two walls 31. The first metal walls 35 of the two walls 31 are respectively disposed on the two second metal bodies 34, the second metal walls 36 of the two walls 31 are both disposed on the first metal body 33, the third metal walls 37 of the two walls 31 are both disposed on the first metal body 33, and the two second metal bodies 34 are respectively mounted on the upper and lower sides of the first metal body 33. Of course, in other embodiments, the third metal walls 37 of the two walls 31 may be respectively disposed on the two second metal bodies 34. In this embodiment, the plurality of metal partition walls 38 of the two walls 31 in each metal body 3 are all disposed on the first metal body 33. Of course, in other embodiments, the metal partition wall 38 of one of the walls 31 in the metal body 3 can be disposed on the first metal body 33, and the metal partition wall 38 of the other wall 31 can be disposed on one of the second metal bodies 34, or the two walls 31 in the metal body 3 can be disposed on two second metal bodies 34 respectively. In this way, the metal body 3 is formed by the first metal body 33 and two upper and lower fixed second metal bodies 34, which reduces the molding difficulty of the metal body 3; and facilitates the connection of the two walls 31 to form a compact metal structure. Compared with the two walls 31 being completely separated from each other, this application is more conducive to the miniaturization design of the electrical connector 100. It should be noted that since the second metal body 34 in this embodiment only provides the first metal wall 35 of the wall 31 and does not provide other structures, the second metal body 34 in this embodiment is the first metal wall 35.

[0048] In this embodiment, the first metal body 33 is provided with multiple protrusions, and the second metal body 34 is provided with multiple fixing holes. Each protrusion is fixedly engaged with the corresponding fixing hole, thereby realizing the mutual assembly and fixation of the first metal body 33 and the two second metal bodies 34. It should be noted that the metal body 3 can be made by powder metallurgy; alternatively, metal sheets can be cut, stamped, or processed into multiple sheets, and then the multiple sheets can be spliced ​​and assembled to form the metal body 3; alternatively, one part of the metal body 3 can be made by powder metallurgy, and the other part can be formed by metal sheet.

[0049] Please see Figure 2 and Figure 3Multiple rows of conductive terminals 4 are respectively housed within multiple walls 31 of the two metal bodies 3. Each row of conductive terminals 4 includes multiple pairs of signal terminals S and multiple ground terminals G arranged alternately along the left-right direction X. At least one ground terminal G is located between two adjacent pairs of signal terminals S. In this embodiment, the paired signal terminals S are used to transmit a pair of differential signals.

[0050] Please see Figure 3 , Figure 4 and Figure 7 as well as Figure 10 and Figure 11 In this embodiment, each signal terminal S and each ground terminal G in each row has a main body 41, a conductive portion 46 extending from the main body 41 toward the circuit board, and an elastic arm 42, an elastic contact portion 43, and a pre-pressure portion 44 extending forward from the main body 41 in sequence. The elastic contact portion 43 is used to contact the mating connector 200 in the vertical direction Z. The third metal wall 37 is located in front of the pre-pressure portion 44, the limiting portion 361 of the second metal wall 36 is located in front of the elastic contact portion 43, and the pre-pressure portion 44 is located between the first metal wall 35 and the limiting portion 361 in the vertical direction Z.

[0051] Please see Figure 7 and Figure 8 , Figure 11 and Figure 12For either the signal terminal S or the ground terminal G in this embodiment, before the electrical connector 100 and the mating connector 200 are inserted, the elastic contact portion 43 exposes the metal body 3 and protrudes from the limiting portion 361 in a direction away from the first metal wall 35, and the pre-pressing portion 44 abuts against the inner side of the limiting portion 361; after the electrical connector 100 and the mating connector 200 are inserted, the elastic contact portion 43 displaces towards the first metal wall 35, and the pre-pressing portion 44 separates from the limiting portion 361. This application, through the limiting portion 361 of the metal body 3, allows the pre-pressing portions 44 of multiple pre-pressed terminals to be pre-pressed against the limiting portion 361 before the mating connector 200 is inserted into the electrical connector 100. This pre-pressing force limits the height position of the elastic contact portions 43 of the multiple pre-pressed terminals, ensuring that the multiple elastic contact portions 43 are kept at approximately the same horizontal height. Moreover, compared to using an insulating shell to preload multiple preloaded terminals, this application uses the metal body 3 to preload multiple preloaded terminals, avoiding problems such as uneven heat dissipation of the insulating material, scratch damage, or breakage during demolding. This reduces the probability of damage to the limiting part 361, thus more effectively preventing poor contact or obstruction of smooth docking between the mating connector 200 and the electrical connector 100 due to large height differences among the multiple elastic contact parts 43. After the mating connector 200 is docked, the elastic contact part 43 can elastically deform under the contact thrust of the mating connector 200, allowing the preloaded part 44 to separate from the limiting part 361. In addition, since a short stub is formed between the contact point of the elastic contact part 43 and the free end of the preloaded terminal, this short stub emits a magnetic field. Especially for preloaded terminals whose free ends are not conductive, this short stub will have a stake effect, resulting in even greater signal interference. Therefore, this application can also utilize the shielding space formed by the first metal wall 35, the second metal wall 36, and the third metal wall 37 of the metal body 3 to provide signal shielding for the stub, reducing signal interference generated by the stub. In summary, the technical solution of this application can both pre-press the multiple pre-pressed terminals using the metal body 3 to maintain the elastic contact portions 43 of the multiple pre-pressed terminals at the same height, and provide signal shielding for the stub formed by the pre-pressed terminals, reducing interference to the outside world.

[0052] It is understandable that, since both the signal terminal S and the ground terminal G in the first embodiment are pre-pressed by the limiting part 361 of the metal body 3, both the signal terminal S and the ground terminal G in the first embodiment are pre-pressed terminals.

[0053] Please see Figure 7 and Figure 8 , Figure 11 and Figure 12 The elastic contact portion 43 of the signal terminal S or the ground terminal G protrudes from the corresponding opening 362 to contact the mating connector 200. Furthermore, before the electrical connector 100 and the mating connector 200 are inserted, the first shielding portion 363 of the second metal wall 36 and the elastic arm 42 of the signal terminal S or the ground terminal G are positioned opposite each other and spaced apart along the vertical direction Z. After the electrical connector 100 and the mating connector 200 are inserted, the elastic arm 42 of the signal terminal S or the ground terminal G is displaced away from the first shielding portion 363. Thus, before the mating connector 200 and the electrical connector 100 are inserted, the elastic arm 42 and the first shielding portion 363 are already spaced apart, and after the mating is completed, the elastic arm 42 is further moved away from the first shielding portion 363, preventing the first shielding portion 363 and the elastic arm 42 from contacting each other, and avoiding short circuits caused by contact with the first shielding portion 363 for the pre-pressurized terminal that is not intended to be grounded.

[0054] Please see Figures 7 to 9 The elastic arm 42 of the signal terminal S and the first shielding portion 363 are arranged facing each other. The operating wavelength of the signal transmitted by the signal terminal S is defined as λ. The length of the first shielding portion 363 extending along the front-rear direction Y is between 0.25λ and 0.5λ. With this arrangement, the first shielding portion 363 can reduce the operating resonance of the signal terminal S. At the same time, the first shielding portion 363 will not be too close to the elastic contact portion 43 and will not easily contact the signal terminal S, thus reducing the short-circuit risk of the signal terminal S.

[0055] Please see Figure 4 and Figure 5 , Figure 7 and Figure 8The electrical connector 100 further includes a plurality of insulating blocks 5, each insulating block 5 covering the body portion 41 of a corresponding pair of signal terminals S; the insulating block 5 and the signal terminals S are housed within a corresponding wall 31, and a portion of the insulating block 5 extends into the clearance space 39 of the corresponding wall 31. Thus, since the clearance space 39 is formed by the stop portion 364 and the second shield portion 365, and the second shield portion 365 is relatively far from the first metal wall 35, compared to not having the clearance space 39, this embodiment allows the signal terminals S and the insulating blocks 5 to move as a whole away from the first metal wall 35, allowing the pre-compression portion 44 of the signal terminals S to be relatively close to the limiting portion 361 and relatively far from the first metal wall 35, facilitating the pre-compression of the signal terminals S and reducing the probability of the pre-compression portion 44 of the signal terminals S contacting the first metal wall 35, thereby reducing... The signal terminal S has a short-circuit risk; at the same time, compared with being exposed to air, the impedance of the signal terminal S within the insulating material will be relatively reduced, and the closer the signal terminal S is to the shielding structure, the lower its impedance. Therefore, under the premise that the main body 41 of the signal terminal S has a low impedance due to being covered by the insulating block 5, this embodiment can also increase the distance between the second shielding part 365 and the main body 41 of the signal terminal S, avoiding excessively lowering the impedance of the main body 41 of the signal terminal S due to the distance between the second shielding part 365 and the main body 41 of the signal terminal S being too small. This embodiment can facilitate the impedance consistency of the signal terminal S.

[0056] Furthermore, the elastic arm 42 of the signal terminal S has an exposed portion 421 extending forward beyond the insulating block 5. This exposed portion 421 faces the first shielding portion 363 of the second metal wall 36 along the vertical direction Z. Furthermore, along the vertical direction Z, the distance between the main body 41 of the signal terminal S and the second shielding portion 365 is greater than the distance between the exposed portion 421 and the first shielding portion 363. The exposed portion 421 extending beyond the insulating block 5 allows the elastic arm 42 to have greater elasticity to support the elastic deformation of the elastic contact portion 43. Since the exposed portion 421 is exposed to air, and the main body 41 is covered by the insulating block 5, the impedance of the main body 41 is relatively low. This application increases the capacitance of the exposed portion 421 by reducing the distance between the exposed portion 421 and the first shielding portion 363, thereby reducing the impedance of the exposed portion 421. This reduces the impedance difference between the exposed portion 421 and the main body 41, which is beneficial for the impedance consistency of the signal terminal S. Simultaneously, the first shielding portion 363 further shields the exposed portion 421 for signal transmission.

[0057] Please see Figure 4 , Figure 5 and Figure 9 Each pair of signal terminals S is covered by a corresponding insulating block 5. The insulating block 5 has a body 51 and a first extension 53 and a second extension 54 extending forward from the body 51. The body 51 covers the main body 41 of the signal terminal S. The elastic arm 42 of the signal terminal S is located between the inner side of the first extension 53 (i.e., the first inner side 531) and the inner side of the second extension 54 (i.e., the second inner side 541) along the vertical direction Z. The first extension 53 is closer to the first metal wall 35 than the second extension 54. The first extension 53 extends forward beyond the second extension 54, and the second extension 54 is stopped by the stop portion 364. By stopping the second extension 54 at the stop portion 364, the forward movement of the insulating block 5 can be restricted, reducing the displacement of the signal terminal S. The stop portion 364 can increase the material area of ​​the second metal wall 36, providing signal shielding for the signal terminal S. The first extension 53 and the limiting part 361 can limit the deformation of the elastic arm 42, preventing excessive deformation and damage or fatigue of the elastic arm 42. Furthermore, the elastic contact part 43, when subjected to the pushing force of the mating connector 200, tends to displace towards the first metal wall 35. This application, by setting the first extension 53 to be relatively long, provides a stronger force to limit the displacement of the elastic contact part 43, thus providing a stronger contact force and improving the contact stability between the elastic contact part 43 and the mating connector 200. Additionally, the stop part 364 can also be used to limit the insertion position of the mating connector 200. Furthermore, before the electrical connector 100 and the mating connector 200 mate, there is a gap between the inner side 531 of the first extension 53 and the elastic arm 42 of the signal terminal S, and the inner side 541 of the second extension 54 extends obliquely towards the second metal wall 36. Thus, the inner side of the second extension 54 is inclined, allowing the elastic arm 42 of the signal terminal S to tilt toward the second metal wall 36, facilitating the pre-pressing part 44 to be pre-pressed by the limiting part 361; at the same time, when the electrical connector 100 and the mating connector 200 are mated, the elastic arm 42 can be elastically displaced toward the first metal wall 35 through the gap between the inner side of the first extension 53 and the elastic arm 42.

[0058] Please see Figure 4 and Figure 5 , Figure 7 and Figure 8The insulating block 5 has a block body 51 with two outer surfaces 511 facing the first metal wall 35 and the second shielding portion 365 respectively. The insulating block 5 also has at least one support post 52 protruding from at least one of the outer surfaces 511 of the block body 51. The support post 52 abuts against the inner side of the first metal wall 35 or the inner side of the second shielding portion 365. The inner side of the first metal wall 35 or the inner side of the second shielding portion 365 and the outer surface 511 facing it are spaced apart. Specifically, in this embodiment, the insulating block 5 has a plurality of support posts 52. A portion of the support posts 52 protrudes towards the inner side of the first metal wall 35, and another portion of the support posts 52 protrudes towards the inner side of the second metal wall 365. In this embodiment, the inner side of the first metal wall 35 and the outer surface 511 facing it are spaced apart, and the inner side of the second shielding portion 365 and the outer surface 511 facing it are also spaced apart. In other embodiments, the insulating block 5 may only have the support post 52 protruding towards the first metal wall 35, or only have the support post 52 protruding towards the second shielding part 365. It should be noted that the insulating block 5 in this application does not completely fill the space between the first metal wall 35 and the second shielding part 365. The volume of the insulating block 5 is smaller than the volume of the space between the first metal wall 35 and the second shielding part 365, reducing the volume of insulating material around the main body 41 of the signal terminal S, and avoiding excessively low impedance of the main body 41 of the signal terminal S. In addition, if the insulating block 5 is assembled to the metal body 3, this application uses the support post 52 to abut against each other, reducing the contact area between the insulating block 5 and the first metal wall 35 or the second shielding part 365, and reducing the impact of molding errors of the insulating block 5 and the metal body 3 on their mutual assembly.

[0059] Please see Figures 7 to 8In this embodiment, the stop portion 364 is located behind the insertion cavity 32. The stop portion 364 can be used to stop the mating connector 200. For each metal body 3, a portion of the second metal wall 36 of its two walls 31 merges to form the second shield portion 365. The second shield portion 365 is connected to the middle position of the stop portion 364, which refers to the middle of the stop portion 364 along the vertical direction Z. Thus, the second shield portion 365 and the stop portion 364 together form two clearance spaces 39, and the two clearance spaces 39 are respectively located on both sides of the second shield portion 365. The two clearance spaces 39 respectively give way to the insulating blocks 5 in the two walls 31. The second shield portion 365 extends from the stop portion 364 along the overall length of the main body portion 41. Thus, the insertion depth of the mating connector 200 can be limited by the stop portion 364, and the signal shielding of the two rows of conductive terminals 4 can be provided over a wider range by the second shield portion 365, reducing mutual interference between the two rows of conductive terminals 4.

[0060] Furthermore, each insulating block 5 has a plurality of support posts 52 spaced apart in its extending direction and protruding toward the second shielding portion 365, with the second shielding portion 365 sandwiched between the support posts 52 of the insulating blocks 5 on both sides. This prevents relative displacement between the metal body 3 and the insulating block 5, and the support posts 52 sandwiching the two sides of the second shielding portion 365 ensures relatively uniform force on both sides, reducing the probability of uneven force and deformation on both sides of the second shielding portion 365. Additionally, since the plurality of support posts 52 of the insulating block 5 are spaced apart, a larger air gap exists between the second shielding portion 365 and the block body 51 of the insulating block 5, reducing the volume of the insulating block 5 and preventing the main body 41 of the signal terminal S from being covered by excessive insulating material, which could lead to excessively low impedance. Furthermore, the conductive portion 46 of the signal terminal S extends from one end of its main body 41 away from the elastic contact portion 43, and the insulating block 5 extends from the conductive portion 46 of the signal terminal S. At least one of the support posts 52 of the insulating block 5 is adjacent to the conductive portion 46 along the extension direction of the signal terminal S. In this embodiment, one of the support posts 52 of the insulating block 5 is located adjacent to the conductive portion 46. Since the conductive portion 46 will contact other electronic components such as circuit boards, the signal interference emitted from the conductive portion 46 will be relatively numerous and dense. By placing at least one support post 52 adjacent to the conductive portion 46, the signal interference emitted by the conductive portion 46 can be isolated as early as possible through the support post 52, and then further isolated through the air gap between the second shielding portion 365 and the block body 51. Thus, the adverse effects of the signal interference emitted by the conductive portion 46 on the outside world can be reduced, such as reducing the far-end crosstalk caused by the conductive portion 46 to the elastic contact portion 43. In this embodiment, the second shielding portion is bent and has a vertical portion extending vertically in the vertical direction. One of the support posts of the insulating block is located adjacent to the conductive portion, that is, adjacent to the end of the vertical portion near the conductive portion, rather than located near the end of the vertical portion away from the conductive portion. In other embodiments, the distance between the support post adjacent to the conductive portion and the conductive portion may not exceed one-quarter of the length of the main body portion.

[0061] Please see Figures 10 to 12In this embodiment, the grounding terminal G further has an abutment portion 45 extending from its pre-compression portion 44 toward the first metal wall 35; wherein, before the electrical connector 100 and the mating connector 200 are inserted, the abutment portion 45 is separated from the first metal wall 35, and after the electrical connector 100 and the mating connector 200 are inserted, the abutment portion 45 abuts against the inner side of the first metal wall 35. Thus, a short stub is formed between the contact point of the elastic contact portion 43 of the grounding terminal G and the abutment portion 45. This application, by abutting the abutment portion 45 of the grounding terminal G against the first metal wall 35, makes the short stub electrically connected to the metal body 3, avoiding the "staking effect" of the short stub of the grounding terminal G and reducing interference with externally transmitted signals. In the first embodiment, the main body 41 of the grounding terminal G has a blanking sheet structure, and the elastic arm 42 of the grounding terminal G extends from the main body 41 by twisting and bending, so that the plate surface of the main body 41 of the grounding terminal G and the plate surface of the elastic arm 42 and the elastic contact portion 43 have different orientation directions.

[0062] Please see Figures 13 to 15 The metal partition wall 38 is located along the left-right direction X between the adjacent grounding terminal G and the signal terminal S. Thus, the at least three-layer grounding shielding structure formed by the two metal partition walls 38 and at least one grounding terminal G between two adjacent pairs of signal terminals S greatly reduces crosstalk interference between adjacent pairs of signal terminals S. Even in transmission scenarios with strong signal penetration capabilities, the electrical connector 100 is applicable to a certain extent. Furthermore, the plate surface of the main body 41 of the grounding terminal G faces the left-right direction X, and the main body 41 of the grounding terminal G has at least two protrusions 411. The two protrusions 411 protrude towards the two adjacent left and right metal partition walls 38, and the two protrusions 411 respectively contact the two left and right metal partition walls 38. The main body 41 of the grounding terminal G has its plate surface facing the left-right direction X, which reduces the size of the electrical connector 100 along the left-right direction X and allows for signal shielding of adjacent pairs of signal terminals S through its larger plate surface. The protrusion 411 contacts the metal partition wall 38, electrically connecting the grounding terminal G and the metal body 3 to form an integrated grounding shielding structure, improving the shielding effect of the electrical connector 100. Simultaneously, the two metal partition walls 38 and the two protrusions 411 contact each other, providing a clamping and fixing effect on the grounding terminal G, reducing its displacement.

[0063] The present invention also provides an electrical connector 100 according to a second embodiment, which is forwardly connected to a mating connector 200 and mounted on a circuit board (not shown, the same below) in the vertical direction Z. The difference between the second embodiment and the first embodiment is that the grounding terminal G of the second embodiment is different from that of the first embodiment. Specifically, in the second embodiment, the grounding terminal G has a main body 41, a conductive part 46 extending from the main body 41 toward the circuit board, an elastic arm 42 extending forward from the main body 41, and an elastic contact part 43 extending forward from the elastic arm 42. The grounding terminal G of the second embodiment does not have a pre-compression part 44 extending from the elastic contact part 43, nor does it have an abutment part 45 extending from the pre-compression part 44 toward the first metal wall 35 of the metal body 3. The grounding terminal G of the second embodiment is entirely a sheet structure of blanking, and the plate surface of each part of the grounding terminal G faces the left-right direction X. The signal terminal S of the second embodiment is configured the same as the signal terminal S of the first embodiment, so it will not be described again here. Understandably, in the first embodiment, both the signal terminal S and the ground terminal G have the pre-pressure portion 44, and both are pre-pressured through the limiting portion 361 of the metal body 3. In the second embodiment, the signal terminal S has the pre-pressure portion 44 and is pre-pressured through the limiting portion 361 of the metal body 3, but the ground terminal G does not have the pre-pressure portion 44 and is not pre-pressured through the metal body 3. Other structures in the second embodiment are similarly configured to those in the first embodiment, achieving similar technical effects, and will not be described further here.

[0064] Understandably, since the signal terminal S in the second embodiment is pre-pressed by the limiting part 361 of the metal body 3, and the ground terminal G is not pre-pressed by the metal body 3, the signal terminal S in the second embodiment is a pre-pressed terminal, and the ground terminal G is not a pre-pressed terminal. Alternatively, in other embodiments, the ground terminal G may have a pre-pressing part 44 so that the ground terminal G is pre-pressed by the limiting part 361 of the metal body 3, and the signal terminal S is not provided with the pre-pressing part 44. In this case, the ground terminal G is a pre-pressed terminal, and the signal terminal S is not a pre-pressed terminal. Furthermore, in other embodiments, multiple terminals of other types besides the signal terminal S and the ground terminal G can also be used as pre-pressed terminals. For example, multiple conductive terminals 4 may include multiple power terminals, and if the multiple power terminals are pre-pressed by the metal body 3, then the multiple power terminals are multiple pre-pressed terminals. This application does not limit the use of only the signal terminal S and / or the ground terminal G as pre-pressed terminals, as long as it is necessary to pre-press multiple conductive terminals 4 to keep multiple elastic contact parts 43 at the same height.

[0065] It should be noted that in the first and second embodiments described above, one insulating block 5 corresponds to a pair of signal terminals S, simultaneously covering the main body 41 of the pair of signal terminals S; one metal body 3 is provided with two walls 31 respectively accommodating two rows of conductive terminals 4; the metal body 3 basically surrounds all parts of the conductive terminals 4. However, in other embodiments, one signal terminal S may be covered and fixed by one insulating block 5; one metal body 3 may have only one wall 31 to accommodate one row of conductive terminals 4, or two or more walls 31 to accommodate multiple rows of conductive terminals 4; or one wall 31 may be formed by multiple independent sub-walls 31 arranged side by side along the left-right direction X, and one independent sub-wall 31 may only accommodate one or more conductive terminals 4, thereby accommodating and fixing a row of conductive terminals 4 through the wall 31 formed by multiple sub-walls 31 arranged side by side. In other embodiments, the metal body 3 may only surround a portion of the conductive terminal 4. For example, the metal body 3 may only surround the pre-compression portion 44 and extend rearward to the position of the elastic arm 42, but not extend all the way to the position of the conductive portion 46. This application does not limit the metal body 3 to substantially surrounding the entire conductive terminal 4.

[0066] In summary, the electrical connector 100 provided by the present invention has the following beneficial effects:

[0067] 1. This application uses the limiting part 361 of the metal body 3 to pre-press the pre-pressing parts 44 of multiple pre-pressed terminals onto the limiting part 361. This pre-pressure restricts the height position of the elastic contact parts 43 of the multiple pre-pressed terminals, ensuring that the multiple elastic contact parts 43 are kept at roughly the same horizontal height. Furthermore, compared to pre-pressing multiple pre-pressed terminals using an insulating shell, this application avoids problems such as uneven heat dissipation of the insulating material, scratch damage, or breakage during demolding, reducing the likelihood of damage to the limiting part 361. This more effectively prevents poor contact or hinders the smooth docking of the connector 200 and the electrical connector 100 due to large differences in the height positions of the multiple elastic contact parts 43. Additionally, this application can also utilize the shielding space formed by the first metal wall 35, the second metal wall 36, and the third metal wall 37 of the metal body 3 to provide signal shielding for the short section of wire formed from the contact point to the free end of the pre-pressed terminal, reducing signal interference generated by this short section.

[0068] 2. The clearance space 39 formed by the second shielding part 365 and the blocking part 364 allows the insulating block 5 to be properly positioned, which facilitates the pre-pressure of the signal terminal S and reduces the probability that the pre-pressure part 44 of the signal terminal S will contact the first metal wall 35, thereby reducing the risk of short circuit of the signal terminal S. Furthermore, it avoids excessively lowering the impedance of the main body 41 of the signal terminal S due to the small distance between the second shielding part 365 and the main body 41 of the signal terminal S, thus promoting impedance consistency of the signal terminal S.

[0069] 3. The distance between the main body 41 of the signal terminal S and the second shield 365 is greater than the distance between the exposed part 421 and the first shield 363, which can increase the capacitance of the exposed part 421 and thereby reduce the impedance of the exposed part 421, thus reducing the impedance difference between the exposed part 421 and the main body 41, which is beneficial to the impedance consistency of the signal terminal S.

[0070] 4. The insulating block 5 abuts against the first metal wall 35 or the second shielding part 365 by setting the support column 52, instead of the outer surface 511 of the entire block directly contacting the metal body 3. This makes the volume of the insulating block 5 smaller than the space volume between the first metal wall 35 and the second shielding part 365, thereby reducing the volume of insulating material around the main body part 41 of the signal terminal S and preventing the impedance of the main body part 41 of the signal terminal S from being too low.

[0071] 5. Define the operating wavelength of the signal transmitted by the signal terminal S as λ, and the length of the first shielding portion 363 is between 0.25λ and 0.5λ. Thus, the first shielding portion 363 can reduce the operating resonance of the signal terminal S and simultaneously reduce the short-circuit risk of the signal terminal S.

[0072] 6. A short stub is formed between the contact point of the elastic contact portion 43 of the grounding terminal G and the abutment portion 45. This application makes the short stub electrically connected to the metal body 3 by abutting the abutment portion 45 of the grounding terminal G to the first metal wall 35, thereby avoiding the short stub of the grounding terminal G from generating a stake effect and reducing signal interference transmitted to the outside.

[0073] The above detailed description is only an illustration of a preferred embodiment of the present invention and is not intended to limit the patent scope of the present invention. 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 forward insertion into a mating connector, characterized in that, include: Multiple conductive terminals, including multiple pre-compression terminals, each of the pre-compression terminals having a main body and an elastic arm, an elastic contact portion and a pre-compression portion extending forward from the main body in sequence, the elastic contact portions of the multiple pre-compression terminals being arranged in a row along the left-right direction, and the elastic contact portions being used to contact the mating connector in the up-down direction. At least one metal body is formed with at least one wall, the wall having a first metal wall, a second metal wall and a third metal wall, the inner sides of the first metal wall and the inner sides of the second metal wall facing each other and spaced apart along the vertical direction, the third metal wall being located in front of the pre-compression part and connecting the first metal wall and the second metal wall, the second metal wall having a limiting part located in front of the elastic contact part and a first shielding part located behind the limiting part, the limiting part and the first shielding part being spaced apart by an opening along a front-back direction, the elastic contact part protruding from the opening to contact the mating connector, and the pre-compression part being located between the first metal wall and the limiting part along the vertical direction; Before the electrical connector and the mating connector are inserted, the elastic contact portion exposes the metal body and protrudes from the limiting portion in a direction away from the first metal wall. The first shielding portion and the elastic arm are arranged facing each other and spaced apart in the vertical direction. The pre-compression portion abuts against the inner side of the limiting portion. After the electrical connector and the mating connector are inserted, the elastic contact portion is displaced in the direction of the first metal wall and in a direction away from the first shielding portion, and the pre-compression portion separates from the limiting portion.

2. The electrical connector as claimed in claim 1, characterized in that, The plurality of pre-compression terminals include at least one ground terminal, the ground terminal having an abutment portion extending from its pre-compression portion toward the first metal wall; wherein, before the electrical connector and the mating connector are inserted, the abutment portion is separated from the first metal wall, and after the electrical connector and the mating connector are inserted, the abutment portion abuts against the inner side of the first metal wall.

3. The electrical connector as described in claim 1, characterized in that, The plurality of preload terminals include at least one signal terminal, and the electrical connector further includes an insulating block covering and fixed to the body portion of the signal terminal; The second metal wall has a stop portion located behind the elastic contact portion and a second shield portion located behind the stop portion. The second shield portion is connected to the stop portion and is displaced relative to the limiting portion in a direction away from the first metal wall. The stop portion and the second shield portion form a clearance space, and a portion of the insulating block extends into the clearance space.

4. The electrical connector as described in claim 3, characterized in that, The elastic arm of the signal terminal has an exposed portion extending forward beyond the insulating block; the exposed portion faces the first shielding portion in the vertical direction, and in the vertical direction, the distance between the main body and the second shielding portion is greater than the distance between the exposed portion and the first shielding portion.

5. The electrical connector as described in claim 4, characterized in that, The second metal wall also has a stop portion connecting the first shielding portion and the second shielding portion. The insulating block has a body covering the main body and a first extension portion and a second extension portion extending forward from the block body. The elastic arm of the signal terminal is located between the first extension portion and the second extension portion in the vertical direction. The first extension portion is close to the first metal wall relative to the second extension portion. The first extension portion extends forward beyond the second extension portion. The second extension portion stops at the stop portion.

6. The electrical connector as claimed in claim 3, characterized in that, The insulating block has a body with two outer surfaces facing the first metal wall and the second shielding part, respectively. The insulating block also has at least one support post protruding from at least one of the outer surfaces of the block body. The support post abuts against the inner side of the first metal wall or the inner side of the second shielding part. The inner side of the first metal wall or the inner side of the second shielding part and the outer surface facing it are spaced apart.

7. The electrical connector as claimed in claim 1, characterized in that, The plurality of conductive terminals include multiple pairs of signal terminals and multiple ground terminals arranged alternately along the left-right direction. The metal body is also provided with multiple metal partitions, which are located between adjacent ground terminals and signal terminals along the left-right direction.

8. The electrical connector as claimed in claim 7, characterized in that, The main body of the grounding terminal faces the left and right direction. The main body of the grounding terminal is provided with at least two protrusions. The two protrusions protrude towards the two metal partition walls adjacent to the grounding terminal, and the two protrusions contact the two metal partition walls respectively.

9. The electrical connector as claimed in claim 1, characterized in that, The plurality of conductive terminals are arranged in at least two rows, each row of conductive terminals includes a plurality of pre-compressed terminals arranged along the left-right direction, the metal body includes two walls that respectively house the two rows of conductive terminals, the metal body has a plug cavity, the plug cavity is located between the front ends of the two walls along the up-down direction and is used to house the mating connector, the elastic contact portions of the two rows of conductive terminals are arranged facing each other along the up-down direction and protrude toward the plug cavity; The metal body includes a first metal body and two second metal bodies for forming the two walls. The two second metal bodies are respectively fixed to the upper and lower sides of the first metal body. The first metal walls of the two walls are respectively disposed on the two second metal bodies. The second metal walls of the two walls are both disposed on the first metal body. The third metal walls of the two walls are disposed on the first metal body or respectively disposed on the two second metal bodies.

10. The electrical connector as claimed in claim 9, characterized in that, The first metal body has a stop portion at the rear of the insertion cavity to block the mating connector. A portion of the second metal wall of the two walls merges to form a second shield portion. The second shield portion is located behind the stop portion and connected to the middle position of the stop portion in the vertical direction. The second shield portion and the stop portion together form two clearance spaces located on both sides of the second shield portion. Each row of multiple conductive terminals includes multiple pairs of signal terminals for transmitting differential signals. The main body of each pair of signal terminals is covered by an insulating block. The two clearance spaces are respectively located within the insulating blocks in the two walls. The second shielding portion extends from the blocking portion along the overall length of the main body of the signal terminal.

11. The electrical connector as claimed in claim 10, characterized in that, Each of the insulating blocks has a plurality of support posts spaced apart in its extending direction and protruding toward the second shielding portion, the second shielding portion being held between the support posts of the insulating blocks on both sides.

12. The electrical connector as claimed in claim 11, characterized in that, The signal terminal further includes a conductive portion extending from the main body of the signal terminal, the conductive portion of the signal terminal extending out of the insulating block, and at least one of the support posts of the insulating block being adjacent to the conductive portion of the signal terminal along the extending direction of the signal terminal.

13. The electrical connector as claimed in claim 1, characterized in that, The plurality of preload terminals include at least one signal terminal, wherein the elastic arm of the signal terminal and the first shield are arranged facing each other, the operating wavelength of the signal transmitted by the signal terminal is defined as λ, and the length of the first shield extending along the front-back direction is between 0.25λ and 0.5λ.

14. The electrical connector as claimed in claim 1, characterized in that, The plurality of pre-loaded terminals include at least one signal terminal, and the electrical connector further includes an insulating block that covers and is fixed to the signal terminal. The insulating block has a body that covers the main body and a first extension and a second extension that extend forward from the block body. The elastic arm of the signal terminal is located between the inner side of the first extension and the inner side of the second extension in the vertical direction. The first extension is closer to the first metal wall than the second extension. Before the electrical connector and the mating connector are mated, there is a gap between the inner side of the first extension and the elastic arm of the signal terminal, and the inner side of the second extension extends obliquely toward the second metal wall.

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