Differential signal terminal pair and electric connector

Abstract

A differential signal terminal pair and an electric connector, the differential signal terminal pair comprises two differential terminals, each differential terminal comprises a base portion extending along the vertical direction, a butt joint portion connected with one end of the base portion and two elastic arms connected with the other end of the base portion, and the two elastic arms are used for elastically abutting against the same metal gasket of a circuit board. Each elastic arm comprises a first arm, a second arm, a bending section and a contact part, the first arm and the second arm are vertically separated, the bending section is used for connecting the first arm and the second arm, the contact part is positioned at the tail end of the second arm, the two first arms extend away from each other in the front-back direction, the two second arms extend close to each other in the front-back direction, and the two contact parts are positioned at the same height. And one part of the side surface, close to the other elastic arm, of each elastic arm is a tearing surface.

Description

[Technical field]

[0001] The utility model relates to a differential signal terminal pair and an electric connector, in particular to a differential signal terminal pair and an electric connector elastically abutting against a circuit board. [Background technology]

[0002] Modern data centers are constantly handling huge amounts of data. In order to meet the growing demand, the electrical connectors used in data centers or similar scenarios are required to achieve a transmission rate of 224Gb / s. Referring to the CN107093811B patent, in the past, this type of electrical connector generally forms an electrical connection with the circuit board through a press-fit technology, that is, the surface of the circuit board has a conductive through hole, and the differential terminal of the electrical connector has a press-fit portion that can be deformed by radial compression. The press-fit portion is inserted into a through hole of smaller size and contacts the conductive layer on the side of the through hole, thereby forming an electrical connection. However, only a part of this press-fit portion can contact the through hole. For example, in CN107093811B, only the opening 111 contacts the through hole, and the tip below the opening 111 does not contact the through hole. The tip is used to guide the entire press-fit portion to be inserted into the through hole, so its size is smaller than the through hole diameter, and naturally cannot contact the through hole, so the tip and the part of the through hole that does not contact the press-fit portion are not part of the signal conduction path, thereby forming an open stub. When transmitting 224Gb / s signals, the open-circuit stubs are prone to cause resonance, resulting in electromagnetic interference and damaging signal integrity. [Contents of the utility model]

[0003] In view of the background technology, the applicant provides a differential signal terminal pair and an electrical connector using the differential signal terminal pair, wherein each differential terminal of the differential signal terminal pair has two elastic arms, each of the elastic arms includes a first arm and a second arm separated into upper and lower parts, a bending section connecting the first arm and the second arm, and a contact portion located at the end of the second arm, the two first arms extend away from each other in the front-to-back direction, the two second arms extend close to each other in the front-to-back direction, the two contact portions are at the same height, and each of the elastic arms has a tearing surface on the side close to the other elastic arm.

[0004] In order to achieve the above purpose, the utility model adopts the following technical means:

[0005] An electrical connector comprises an insulating body and a plurality of transmission modules fixed in the insulating body, each of the transmission modules comprising a shielding sleeve, an insulating block surrounded by the shielding sleeve and a differential signal terminal pair fixed to the insulating block, the differential signal terminal pair comprising two differential terminals, each of the differential terminals comprising a base extending in the up-down direction, a docking portion connecting one end of the base and two elastic arms connecting the other end of the base, the two elastic arms being used to elastically abut against the same metal gasket of a circuit board, characterized in that each of the elastic arms comprises a first arm and a second arm separated up and down, a bending section connecting the first arm and the second arm, and a contact portion located at the end of the second arm, the two first arms extending away from each other in the front-to-back direction, the two second arms extending close to each other in the front-to-back direction, the two contact portions being at the same height, and a portion of the side surface of each elastic arm close to the other elastic arm being a tearing surface.

[0006] Furthermore, the tearing surface extends from the first arm to the second arm, and each of the elastic arms also has a cutting notch extending from the second arm to the contact portion. The width of the contact portion in the left-right direction is smaller than the width of the second arm, and the distance between the two contact portions in the left-right direction is greater than the distance between the two second arms.

[0007] Furthermore, the tearing surface extends from the first arm to the contact portion, and the two second arms are horizontally twisted away from each other at the same angle, and the angle is greater than or equal to 2°.

[0008] Furthermore, in the front-to-back direction, the maximum distances between the two bending sections of the same differential terminal and the base are equal.

[0009] Furthermore, it is characterized in that: the tearing surface is only located at the contact portion, and the two contact portions are staggered front and back.

[0010] A differential signal terminal pair includes two differential terminals, each of the differential terminals includes a base extending in the up-down direction, a docking portion connecting one end of the base and two elastic arms connecting the other end of the base, the two elastic arms are used to elastically abut the same metal gasket of a circuit board, and is characterized in that each of the elastic arms includes a first arm and a second arm separated up and down, a bending section connecting the first arm and the second arm, and a contact portion located at the end of the second arm, the two first arms extend away from each other in the front-to-back direction, the two second arms extend close to each other in the front-to-back direction, the two contact portions are at the same height, and a portion of the side surface of each elastic arm close to the other elastic arm is a tearing surface.

[0011] Furthermore, the tearing surface extends from the first arm to the second arm, the two contact portions are opposite to each other on the left and right, and each elastic arm has a cutting notch extending from the second arm to the contact portion on one side close to the other elastic arm. The width of the contact portion in the left and right direction is smaller than the width of the second arm, and the distance between the two contact portions in the left and right direction is greater than the distance between the two second arms. The cutting notch is arranged adjacent to the upper end of the tearing surface.

[0012] Furthermore, the tearing surface extends from the first arm to the contact portion, and the two second arms are horizontally twisted away from each other at the same angle, and the angle is greater than or equal to 2°.

[0013] Furthermore, the two elastic arms have the same length, corresponding width and shape.

[0014] Furthermore, the tearing surface is only located at the contact portion, and the two contact portions are staggered in front and behind.

[0015] Furthermore, there is a feeding gap between the sides of the two elastic arms that are close to each other, a part of the feeding gap is located at the bending connection between the first arm and the base, and the feeding gap is arranged adjacent to the lower end of the tearing surface.

[0016] The above technical means have the following technical effects: the contact portion is located at the end of the elastic arm, and will not form an open circuit stump when it abuts against the metal gasket, thereby avoiding high-frequency resonance and corresponding electromagnetic interference; the two tearing surfaces minimize the distance between the two elastic arms in the left and right directions, thereby making the contact portions on the elastic arms close to each other in the left and right directions. Without reducing the size of the contact portion, the left and right sizes of the metal gasket of the circuit board that is in contact with the two contact portions at the same time can be reduced accordingly, thereby avoiding the impedance at the metal gasket being too low, and improving the minimum impedance value of the entire system when transmitting a 224Gb / s signal, which helps the entire electrical connection system to achieve better characteristic impedance matching and reduce the attenuation of the 224Gb / s signal. The two second arms extend toward each other in the front-to-back direction, so that the two contact portions at the ends of the second arms can be close to each other in the front-to-back direction, and the front-to-back size of the metal gasket can be reduced accordingly, similarly avoiding the impedance at the metal gasket being too low, and improving the minimum impedance value of the entire system when transmitting a 224Gb / s signal, which helps the entire electrical connection system to achieve better characteristic impedance matching and reduce the attenuation of the 224Gb / s signal. In addition, extending two elastic arms integrally from the same base simultaneously not only increases the conductive path, but also eliminates the need to weld two independent elastic arms to the base, thereby avoiding the need to add a new set of molds due to the addition of independent elastic arms, thereby reducing the mold cost for manufacturing the differential terminal.

Brief Description of the Drawings

[0017] Figure 1 is a schematic diagram of an electrical connector of the present utility model;

[0018] Figure 2 is a schematic diagram of a first embodiment of a differential terminal;

[0019] Figure 3 It is a schematic diagram of the differential terminal of the first embodiment elastically abutting against the metal pad of the circuit board;

[0020] Figure 4 for Figure 2 A top view of

[0021] Figure 5 for Figure 2 Left view of

[0022] Figure 6 is a schematic diagram of a second embodiment of a differential terminal;

[0023] Figure 7 It is a schematic diagram of the differential terminal of the second embodiment elastically abutting against the metal pad of the circuit board;

[0024] Figure 8 for Figure 6 A top view of

[0025] Fig. 9 for Figure 6 Left view of

[0026] Fig.10 is a schematic diagram of a third embodiment of a differential terminal;

[0027] Fig.11 It is a schematic diagram of the differential terminal of the third embodiment elastically abutting against the metal pad of the circuit board;

[0028] Fig.12 for Fig.10 Front view of

[0029] Fig.13 for Fig.10 Left view of .

[0030] Description of Figure Numbers:

[0031] Insulation body 1 Transmission module 2 Shielding sleeve 21

[0032] Insulation block 22 Differential signal terminal pair 23 Differential terminal 230

[0033] Base 231 docking portion 232 elastic arm 233

[0034] First arm 2331 Second arm 2332 Bending section 2333

[0035] Contact portion 2334 Tearing surface 2335 Cutting notch 2336

[0036] Cutting gap 2337 circuit board 3 metal gasket 31 [Specific implementation method]

[0037] In order to facilitate a better understanding of the purpose, structure, features and functions of the present invention, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods.

[0038] Figure 1 It is a schematic diagram of the electrical connector of the utility model. The electrical connector includes an insulating body 1 and a plurality of transmission modules 2 fixed in the insulating body 1, each of the transmission modules 2 includes a shielding sleeve 21, an insulating block 22 surrounded by the shielding sleeve 21 and a differential signal terminal pair 23 fixed to the insulating block 22, and the differential signal terminal pair 23 includes two differential terminals 230 for transmitting differential signals. Each of the differential terminals 230 includes a base 231 extending in the up-down direction, a docking portion 232 connected to one end of the base 231, and two elastic arms 233 connected to the other end of the base 231. The docking portion 232 is used to electrically connect to the docking terminal of the docking connector (not shown), and the two elastic arms 233 are used to elastically abut the metal gasket 31 of the circuit board 3 (see for auxiliary reference). Figure 3 ).

[0039] For the convenience of detailed description in conjunction with the drawings below, the X1X2 direction in the drawings is designated as the front-to-back direction, the Y1Y2 direction in the drawings is designated as the left-right direction, and the Z1Z2 direction in the drawings is designated as the up-down direction, which does not limit the use direction of the present invention.

[0040] Figures 2 to 52 is a schematic diagram of a first embodiment of the differential signal terminal pair 23, wherein the two elastic arms 233 generally extend upward relative to the base 231. In this embodiment, each of the elastic arms 233 includes a first arm 2331 and a second arm 2332 separated from each other, a bending section 2333 connecting the first arm 2331 and the second arm 2332, and a contact portion 2334 located at the end of the second arm 2332. The two first arms 2331 extend away from each other in the front-to-back direction, and the two second arms 2332 extend toward each other in the front-to-back direction. The two contact portions 2334 are at the same height and opposite to each other. A portion of the side surface of each elastic arm 233 close to the other elastic arm 233 is a tearing surface 2335, and the tearing surface 2335 is formed by the tearing of the two elastic arms 233 from each other, and the tearing surface 2335 extends from the first arm 2331 to the second arm 2332. In this embodiment, the tearing surface 2335 extends approximately from the middle of the first arm 2331 to the middle of the second arm 2332. Each elastic arm 233 has a lower material notch 2336 extending from the second arm 2332 to the contact portion 2334 on one side close to the other elastic arm 233. The lower material notch 2336 is arranged adjacent to the upper end of the tearing surface 2335. The lower material notch 2336 makes the contact portion 2334 narrower in the left-right direction relative to the second arm 2332. The width of the contact portion 2334 in the left-right direction is smaller than the width of the second arm 2332. The distance between the two contact portions 2334 in the left-right direction is greater than the distance between the two second arms 2332, that is, the distance between the two contact portions 2334 is increased. There is a material clearance 2337 between the sides of the two elastic arms 233 that are close to each other. The material clearance 2337 is located at the bending connection between the first arm 2331 and the base 231. The material clearance 2337 is arranged adjacent to the lower end of the tear surface 2335, that is, the tear surface 2335 is not connected to the base 231, thereby avoiding the two elastic arms 233 from colliding with each other at the connection with the base 231.

[0041] like Figure 3 and Figure 4As shown, the distance between the two tearing surfaces 2335 in the left-right direction is the shortest distance between the two elastic arms 233 in the left-right direction. Ideally, the two tearing surfaces 2335 are in the same vertical plane, that is, the left-right distance between the two tearing surfaces 2335 can be as small as 0. The left-right width of each elastic arm 233 can be widened without increasing the total left-right width of the two elastic arms 233, so as to adjust the elasticity and impedance of each elastic arm 233. The tearing surfaces 2335 of each elastic arm 233 move away from each other along with the first arm 2331, and cannot overlap left and right due to the presence of the blanking notch 2336 and the blanking gap 2337, thereby avoiding the collision between the two tearing surfaces 2335 closest to each other in the left-right direction of the two elastic arms 233, and ensuring the stable elastic contact between the contact portion 2334 and the metal gasket 31. Under the premise that they do not collide with each other, the two elastic arms 233 tear each other and make the two elastic arms 233 as close to each other as possible in the left and right directions, so that the two contact parts 2334 located at the ends of the two elastic arms 233 are also close to each other in the left and right directions. At the same time, the area of ​​the metal gasket 31 contacting the two contact parts 2334 can be reduced accordingly, thereby increasing the impedance at the metal gasket 31, avoiding the impedance at the metal gasket 31 being too low, and improving the minimum impedance value of the entire system when transmitting 224Gb / s signals, which helps the entire electrical connection system to achieve better characteristic impedance matching and reduce the attenuation of 224Gb / s signals.

[0042] refer to Figures 2 to 5 In this embodiment, the contours of the two elastic arms 233 of the same differential terminal 230 are Figure 3 In the mirror symmetry, Figure 4 The two elastic arms 233 of the same differential terminal 230 are symmetrically rotated 180 degrees, so the length, corresponding width and shape of the two elastic arms 233 are the same, that is, the length and width of the two first arms 2331 are the same, the length, width and bending radius of the two bending segments 2333 are the same, the length and width of the two second arms 2332 are the same, and the farthest distance between the two bending segments 2333 of the same differential terminal 230 and the base 231 in the front-to-back direction is equal, so the electrical performance of the two elastic arms 233 of the same differential terminal 230 is the same, and the length of the conductive path is the same, which helps to reduce the signal loss of the differential signal terminal pair 23 when transmitting high-frequency signals. In this embodiment, the first arm 2331 is directly connected to the base 231, and in other embodiments, other structures can be additionally provided between the first arm 2331 and the base 231, such as an additional third arm and a connecting portion connecting the third arm to the first arm 2331.

[0043] The elastic arm 233 is formed by a stamping process, which includes a blanking process and a tearing process. "Blanking" refers to the stamping die cutting off the redundant parts of the metal substrate that are not used for subsequent processing. "Tearing" refers to the stamping die moving two parts that were originally on the same metal sheet in opposite directions, tearing the original connection between the two, and the tearing process will not significantly reduce the material. Different stamping processes are applied to different parts of the same elastic arm 233. The two elastic arms 233 are originally on the same metal plate and spliced ​​together along the tear surface 2335. The cutting notch 2336, the cutting gap 2337 and the outline of the elastic arm 233 except the tear surface 2335 are first cut and formed. The two contact parts 2334 are separated by the cutting notch 2336, and the connection between the first arm 2331 and the base 231 is separated by the cutting gap 2337. The two spliced ​​elastic arms 233 are then separated from each other by tearing to form the tear surface 2335. Finally, the two elastic arms 233 are bent as shown by a bending jig. Figures 2 to 5 Shape shown.

[0044] Figures 6 to 9 Schematic diagram of the second embodiment of the differential signal terminal pair 23. In this embodiment, each of the elastic arms 233 includes a first arm 2331 and a second arm 2332 separated from each other, a bending section 2333 connecting the first arm 2331 and the second arm 2332, and a contact portion 2334 located at the end of the second arm 2332. The two first arms 2331 extend away from each other in the front-to-back direction, and the two second arms 2332 extend toward each other in the front-to-back direction. The two contact portions 2334 are at the same height and opposite to each other left and right. Each elastic arm 233 has a tearing surface 2335 on the side close to the other elastic arm 233. The tearing surface 2335 is formed by tearing the two elastic arms 233 from each other. The tearing surface 2335 extends from the first arm 2331 to the contact portion 2334. Figure 8As shown, the two second arms 2332 are twisted horizontally at the same angle α away from each other, so that the distance between the two contact portions 2334 at the ends of the two second arms 2332 is increased, so as to prevent the two contact portions 2334 from colliding with each other after abutting the metal gasket 31. In this embodiment, each second arm 2332 is twisted outward by 2 degrees. The second arm 2332 can prevent the two contact portions 2334 from colliding with each other by twisting outward horizontally by 2 degrees or more. There is a material clearance 2337 between the sides of the two elastic arms 233 that are close to each other. The material clearance 2337 is located at the bending connection between the first arm 2331 and the base 231. The material clearance 2337 is arranged adjacent to the lower end of the tearing surface 2335, that is, the tearing surface 2335 is not connected to the base 231, so as to prevent the two elastic arms 233 from colliding with each other at the connection with the base 231.

[0045] refer to Figures 6 to 9 In this embodiment, the contours of the two elastic arms 233 of the same differential terminal 230 are Figure 7 In the mirror symmetry, Figure 8 The two elastic arms 233 of the same differential terminal 230 are symmetrical when rotated 180 degrees, so the length, corresponding width and shape of the two elastic arms 233 are the same, that is, the length and width of the two first arms 2331 are the same, the length, width and bending radius of the two bending sections 2333 are the same, the length and width of the two second arms 2332 are the same, and the farthest distance between the two bending sections 2333 of the same differential terminal 230 and the base 231 in the front-to-back direction is equal, so the electrical properties of the two elastic arms 233 of the same differential terminal 230 are the same, which helps to reduce the signal loss of the differential terminal 230 when transmitting high-frequency signals. In this embodiment, the first arm 2331 is directly connected to the base 231, and in other embodiments, other structures may be additionally provided between the first arm 2331 and the base 231, such as an additional third arm and a connecting portion connecting the third arm to the first arm 2331.

[0046] The forming process of the elastic arm 233 of the second embodiment is similar to that of the first embodiment, and the main difference is that the elastic arm 233 of the second embodiment does not have the blanking notch 2336, and the two contact portions 2334 of the same differential terminal 230 are spliced ​​with each other before separation, and the two contact portions 2334 are separated from each other by tearing. In order to avoid the two contact portions 2334 from colliding with each other, when the two elastic arms 233 are bent, the two second arms 2332 are twisted outward so that the two contact portions 2334 are away from each other.

[0047] refer to Figures 10 to 13FIG. 1 is a schematic diagram of a third embodiment of the differential signal terminal pair. Fig.10 In this embodiment, each of the elastic arms 2330 includes a first arm 2331 and a second arm 2332 separated into upper and lower parts, a bending section 2333 connecting the first arm 2331 and the second arm 2332, and a contact portion 2334 located at the end of the second arm 2332. The two contact portions 2334 are at the same height. In this embodiment, the contact portion 2334 is located at the end of the second arm 2332 and extends toward the other second arm 2332 in the left and right direction. The two first arms 2331 extend away from each other in the front-to-back direction, and the two second arms 2332 extend close to each other in the front-to-back direction. Each of the contact portions 2334 has a tearing surface 2335 facing the other second arm 2332, and the two tearing surfaces 2335 are formed by tearing the two contact portions 2334. Fig.11 and Fig.12 As shown, each contact portion 2334 extends toward the other second arm 2332 in the left-right direction, and the distance between the two tearing surfaces 2335 in the left-right direction is the shortest distance between the two elastic arms 2330 in the left-right direction. Ideally, the projections of the two tearing surfaces 2335 along the front-to-back direction are aligned, that is, the two tearing surfaces 2335 are located in the same vertical plane, that is, the left-right distance between the two tearing surfaces 2335 can be as small as 0. In order to avoid mutual collision, the two tearing surfaces 2335 are staggered one in front and one in back. In this embodiment, one of the tearing surfaces 2335 exceeds the front side of the base 231, and the other tearing surface 2335 exceeds the rear side of the base 231. In this embodiment, as Fig.11 and Fig.12 As shown, each of the elastic arms 2330 has a cutting gap 2337 on one side close to the other elastic arm 2330. The cutting gap 2337 extends from the base 231 along the elastic arm 2330 and is arranged adjacent to the lower end of the tear surface 2335. Each of the contact portions 2334 and its tear surface 2335 are opposite to the cutting gap 2337 on the left and right sides, and the spacing of the same differential terminal 2 at the cutting gap 2337 in the left and right directions is greater than the spacing between the two tear surfaces 2335.

[0048] refer to Figures 10 to 13 In this embodiment, the base 231 is in the shape of a flat plate, and the two tearing surfaces 2335 pass over the front and rear sides of the base 231 along the front-to-back direction. Fig.11 Rotate 180 degrees to be symmetrical. Fig.12 The center axis L of the base 231 is mirror-symmetrical, so the reference Fig.11 and Fig.12, the length, corresponding width and shape of the two elastic arms 2330 of the same differential terminal 23 are the same, the length and width of the two first arms 2331 are the same, the length, width and bending radius of the two bending sections 2333 are the same, the length and width of the two second arms 2332 are the same, and the farthest distance between the two bending sections 2333 of the same differential terminal 23 and the base 231 in the front-to-back direction is equal, so the electrical performance of the two elastic arms 2330 of the same differential terminal 23 is the same, which helps to reduce the signal loss of the differential terminal 23 when transmitting high-frequency signals. In this embodiment, the first arm 2331 is directly connected to the base 231, while in other embodiments, other structures may be additionally provided between the first arm 2331 and the base 231, such as an additional third arm and a connecting portion connecting the third arm to the first arm 2331.

[0049] The differential signal terminal pair 23 and the electrical connector of the utility model have the following beneficial effects:

[0050] (1) The contact portion 2334 is located at the end of the elastic arm 233, and does not form an open circuit stump when it abuts against the metal gasket 31, thereby avoiding high-frequency resonance and corresponding electromagnetic interference; the two tear surfaces 2335 minimize the distance between the two elastic arms 233 in the left-right direction, thereby making the contact portions 2334 on the elastic arms 233 close to each other in the left-right direction. Without reducing the size of the contact portion 2334, the left-right size of the metal gasket 31 of the circuit board 3 that is in contact with the two contact portions 2334 can be reduced accordingly, thereby avoiding too low impedance at the metal gasket 31 and improving the transmission efficiency of the entire system. The lowest impedance value when transmitting 224Gb / s signal helps the entire electrical connection system to achieve better characteristic impedance matching and reduce the attenuation of 224Gb / s signal. The two second arms 2332 extend toward each other in the front-to-back direction, so that the two contact parts 2334 at the ends of the second arms 2332 can be close to each other in the front-to-back direction, and the front-to-back dimensions of the metal gasket 31 can be correspondingly reduced, which also avoids the impedance at the metal gasket 31 being too low, and improves the lowest impedance value of the entire system when transmitting 224Gb / s signal, which helps the entire electrical connection system to achieve better characteristic impedance matching and reduce the attenuation of 224Gb / s signal. In addition, extending two elastic arms 233 from the same base 231 at the same time not only increases the conductive path, but also eliminates the need to weld and fix the two independent elastic arms 233 to the base 231, avoiding the need to add a new set of molds due to the addition of independent elastic arms 233, and reducing the mold cost of manufacturing the differential terminal 230.

[0051] (2) The two contact portions 2334 are at the same height, so that the two contact portions 2334 can elastically abut against the same metal gasket 31 at the same time. The two contact portions 2334 have the same contact stability, which also helps to maintain the same conductive path length of the two elastic arms 233, thereby ensuring that the differential terminal 230 and the differential signal terminal pair 23 can exert the predetermined high-frequency performance.

[0052] (3) In one embodiment, the tearing surface 2335 extends from the first arm 2331 to the second arm 2332, and the end of each elastic arm 233 is provided with a cutting notch 2336 near the side of the other elastic arm 233, and the cutting notch 2336 extends from the contact portion 2334 to the second arm 2332. The width of the contact portion 2334 in the left-right direction is smaller than the width of the second arm 2332, and the distance between the two contact portions 2334 in the left-right direction is larger than the distance between the two second arms 2332, so as to avoid the two contact portions 2334 from colliding with each other during the elastic abutment against the metal gasket 31, thereby preventing the two contact portions 2334 from aligning and abutting against the same metal gasket 31.

[0053] (4) In one embodiment, the tearing surface 2335 extends from the first arm 2331 to the contact portion 2334, and the two second arms 2332 are horizontally twisted away from each other at the same angle, so that the distance between the two contact portions 2334 at the ends of the two second arms 2332 is increased, thereby preventing the two contact portions 2334 from colliding with each other during the process of elastically abutting the metal gasket 31, thereby preventing the two contact portions 2334 from being able to align and abut the same metal gasket 31.

[0054] (5) In one embodiment, the tearing surface 2335 is only provided at the contact portion 2334, which directly reduces the left-right spacing between the two contact portions 2334. While maintaining the original width of each contact portion 2334, the width of the metal gasket 31 abutting against the two contact portions 2334 along the left-right direction can be minimized, thereby effectively improving the impedance at the metal gasket 31, thereby improving the minimum impedance value of the entire system when transmitting a 224Gb / s signal, helping the entire electrical connection system to achieve better characteristic impedance matching and reduce the attenuation of the 224Gb / s signal. The two contact portions 2334 are staggered front to back to avoid collision between the two contact portions 2334 during the elastic compression of the elastic arm 233.

[0055] (6) There is a material clearance 2337 between the sides of the two elastic arms 233 that are close to each other. The material clearance 2337 is located at the bending connection between the first arm 2331 and the base 231. The material clearance 2337 is arranged adjacent to the lower end of the tear surface 2335, so that the tear surface 2335 is not connected to the base 231, thereby avoiding the two elastic arms 233 from colliding with each other at the connection with the base 231 and facilitating the bending and forming of the elastic arms 233 from the base 231.

[0056] (7) The lengths, corresponding widths and shapes of the two elastic arms 233 are the same, so that the conductive path lengths of the two elastic arms 233 are equal. The same signal can reach the metal gasket 31 at the same time after passing through the two elastic arms 233, thereby avoiding periodic resonance caused by asynchronous signal transmission due to unequal conductive paths.

[0057] (8) The two contact portions 2334 are arranged opposite to each other on the left and right sides, thereby minimizing the front-to-back dimensions occupied by the two contact portions 2334. While maintaining the original length of each contact portion 2334 unchanged, the length of the metal gasket 31 abutting against the two contact portions 2334 along the front-to-back direction can be minimized, thereby effectively improving the impedance at the metal gasket 31.

[0058] The above detailed description is only an explanation of the preferred embodiment of the present utility model, and does not limit the patent scope of the present utility model. Therefore, all equivalent technical changes made by using the description and illustrations of the present utility model are included in the patent scope of the present utility model.

Claims

1. An electrical connector, comprising an insulating body and a plurality of transmission modules fixed in the insulating body, each of the transmission modules comprising a shielding sleeve, an insulating block surrounded by the shielding sleeve and a differential signal terminal pair fixed to the insulating block, the differential signal terminal pair comprising two differential terminals, each of the differential terminals comprising a base extending in the up-down direction, a docking portion connected to one end of the base and two elastic arms connected to the other end of the base, the two elastic arms being used to elastically abut against the same metal gasket of a circuit board, characterized in that: Each of the elastic arms includes a first arm and a second arm separated into upper and lower parts, a bending section connecting the first arm and the second arm, and a contact portion located at the end of the second arm, the two first arms extend away from each other in the front-to-back direction, the two second arms extend close to each other in the front-to-back direction, the two contact portions are at the same height, and a portion of the side surface of each elastic arm close to the other elastic arm is a tearing surface.

2. The electrical connector according to claim 1, wherein: The tearing surface extends from the first arm to the second arm, and each of the elastic arms also has a lower material notch extending from the second arm to the contact portion. The width of the contact portion in the left-right direction is smaller than the width of the second arm, and the distance between the two contact portions in the left-right direction is greater than the distance between the two second arms.

3. The electrical connector according to claim 1, wherein: The tearing surface extends from the first arm to the contact portion, and the two second arms are horizontally twisted away from each other at the same angle, and the angle is greater than or equal to 2°.

4. The electrical connector according to claim 1, wherein: The maximum distances between the two bending sections of the same differential terminal and the base in the front-to-back direction are equal.

5. The electrical connector according to claim 1, wherein: The tearing surface is only located at the contact portion, and the two contact portions are staggered front and back.

6. A differential signal terminal pair, comprising two differential terminals, each of the differential terminals comprising a base extending in the up-down direction, a docking portion connected to one end of the base, and two elastic arms connected to the other end of the base, the two elastic arms being used to elastically abut against the same metal pad of a circuit board, characterized in that: Each of the elastic arms includes a first arm and a second arm separated into upper and lower parts, a bending section connecting the first arm and the second arm, and a contact portion located at the end of the second arm, the two first arms extend away from each other in the front-to-back direction, the two second arms extend close to each other in the front-to-back direction, the two contact portions are at the same height, and a portion of the side surface of each elastic arm close to the other elastic arm is a tearing surface.

7. The differential signal terminal pair according to claim 6, wherein: The tearing surface extends from the first arm to the second arm, and the two contact portions are opposite to each other on the left and right. The side of each elastic arm close to the other elastic arm also has a cutting notch extending from the second arm to the contact portion. The width of the contact portion in the left and right direction is smaller than the width of the second arm, and the distance between the two contact portions in the left and right direction is greater than the distance between the two second arms. The cutting notch is arranged adjacent to the upper end of the tearing surface.

8. The differential signal terminal pair according to claim 6, wherein: The tearing surface extends from the first arm to the contact portion, and the two second arms are horizontally twisted away from each other at the same angle, and the angle is greater than or equal to 2°.

9. The differential signal terminal pair according to claim 6, wherein: The two elastic arms have the same length, corresponding width and shape.

10. The differential signal terminal pair according to claim 6, wherein: The tearing surface is only located at the contact portion, and the two contact portions are staggered one in front and one behind.

11. The differential signal terminal pair according to claim 6, wherein: A feeding gap is provided between the sides of the two elastic arms that are close to each other. A part of the feeding gap is located at the bending connection between the first arm and the base. The feeding gap is arranged adjacent to the lower end of the tearing surface.

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