TWI766451B - Terminal and socket connectors - Google Patents

Abstract

A terminal and socket connector, the terminal includes a welding segment, an upright arm and a bent arm. The welding segment has a first end portion and a second end portion located at opposite ends and extending upward. The upright arm extends upwardly from the first end. The bending arm has an abutting section extending upward from the second end, a lower bending section extending obliquely upward from the abutting section to the direction away from the upright arm, and the lower bending section first extends away from the upright arm and then bends in the opposite direction. An elastic bending section extending obliquely upward in the direction close to the upright arm, an upper bending section extending upward from the elastic bending section, and a contact section extending upward from the upper bending section. Wherein, at least one of the upright arm and the curved arm forms a shoulder protruding from the side of the welding section on at least one side of the two sides at the joint with the welding section, so that the terminal is more stable when installed in the insulating shell better positioning effect and better signal integrity performance.

Description

Terminal and socket connectors

The present invention relates to a terminal and socket connector.

Patent No. WO 2019/245153 discloses a leaf spring type connection pin, the leaf spring type connection pin has a support pin extending in a vertical direction, a leaf spring spaced from the support pin at a predetermined interval, and a connection to the support pin The bridge between the pin and the leaf spring. The support pin has a curved lip at the upper end, a first base at the lower end, and locking projections protruding to both sides near the lip. The leaf spring has an upper probe portion extending in a direction perpendicular to the lip portion, a second base portion disposed at the same height as the first base portion, and a V-shaped portion disposed between the upper probe portion and the second base portion , an upper curved portion connecting the upper end of the V-shaped portion and the lower end of the upper probe portion, and a lower curved portion connecting the lower end of the V-shaped portion and the upper end of the second base portion. The bridge is bent at the lower end of the first base and the lower end of the second base to connect the two, and serves as a lower probe of the leaf spring type connecting pin. The leaf spring type connecting pin is engaged with the interior of the insulating housing by means of locking projections to help fix the position of the support pin.

When the leaf spring type connecting pin is installed on the insulating housing, since the position of the locking protrusion is higher than the first base and the second base and close to the lip, the positioning of the leaf spring type connecting pin is less stable, and the position of the leaf spring type connecting pin is relatively unstable. The upper probe part of the device is easy to shake when being crimped by the butted conductive pad, thereby affecting the stability of the electrical connection.

In addition, since the electrical connector needs to meet the low height and meet the electrical requirements of high-speed transmission, how to improve the signal integrity (SI) of the terminal and the electrical connector when transmitting signals is also a subject that needs to be improved.

Therefore, one of the objectives of the present invention is to provide a terminal that can solve the aforementioned problems.

Therefore, in some embodiments, the terminal of the present invention includes a welding section, an upright arm and a curved arm. The welding segment has a first end portion and a second end portion located at opposite ends and extending upward. The upright arm extends upwardly from the first end. The bending arm has an abutting section extending upward from the second end, a lower bending section extending obliquely upward from the abutting section in a direction away from the upright arm, and a lower bending section first leaving the The upright arm is extended in the direction of the upright arm and then bent in the opposite direction, and the elastic bending section extends obliquely upward in the direction close to the upright arm, an upper bending section which is bent and extends upward from the elastic bending section, and a contact section which extends upward from the upper bending section . Wherein, at least one of the upright arm and the curved arm forms a shoulder protruding from the side of the welding section on at least one side of the two sides at the joint with the welding section.

In some embodiments, at least one of the upright arm and the curved arm forms a shoulder protruding from the side of the welding section on both sides of the joint with the welding section.

In some embodiments, at least one side of the two sides of the upright arm and the curved arm at the joint with the welding section forms a shoulder that protrudes from the side of the welding section.

In some embodiments, both sides of the upright arm and the curved arm at the joint with the welding segment form a shoulder protruding from the side edge of the welding segment.

In some embodiments, the contact section is located above the upright arm and moves downward when pressed to bring the upper curved section into contact with the upright arm.

In some embodiments, the distal end of the upright arm extends obliquely upward in a direction away from the curved arm to form an inclined end portion against which the upper curved segment is pressed down.

In some embodiments, the width of the inclined end portion is greater than the width of the upper curved section.

In some embodiments, the soldering section further has a soldering portion connecting the first end portion and the second end portion, and the soldering portion has a downward soldering surface for soldering with a solder ball.

Another object of the present invention is to provide a socket connector that can solve the aforementioned problems.

Therefore, in some embodiments, the receptacle connector of the present invention includes an insulating housing and a plurality of terminals. The insulating case has a bottom surface, a top surface opposite to the bottom surface, and a plurality of terminal grooves. Each terminal groove has a positioning groove portion extending through the bottom surface and the top surface, and a receiving groove portion extending laterally from the positioning groove portion and passing through the top surface. And the wall surface defining the positioning groove portion includes two first sidewall surfaces spaced apart from each other, a second sidewall surface connecting one side of the first sidewall surfaces, and a second sidewall surface connecting the first sidewall surfaces and connecting with the first sidewall surface. The two sidewall surfaces are spaced apart from the opposite third sidewall surface. At least one of the first sidewall surfaces forms a protruding step portion near the bottom surface, and the height of the third sidewall surface is lower than the second sidewall surface so that the positioning groove portion communicates with the receiving groove portion . The wall surface defining the receiving groove portion includes a bottom wall surface facing the top surface and in contact with the third side wall surface, and the bottom wall surface forms a convex portion adjacent to the third side wall surface. The terminals are respectively arranged in the terminal slots. Each terminal includes a welding section adjacent to the bottom surface and a bending arm, the bending arm has an abutting section extending upward from one end of the welding section and adjacent to the third side wall surface, a contact section extending from the abutting section A lower curved section extending in the direction of the receiving groove and extending obliquely and close to the convex portion, a first extending from the lower curved section away from the second side wall surface, and then reversely bending and obliquely upward in the direction of approaching the second side wall surface An extending elastic bending section, an upper bending section extending upwardly from the elastic bending section, and a contact section extending upwardly from the upper bending section. At least one of the two sides of the abutting section where the welding section meets the welding section forms a shoulder protruding from the welding section, and the shoulder abuts against the corresponding step to be positioned.

In some embodiments, each of the first sidewall surfaces forms a protruding step near the bottom surface, and both sides of the abutting section at the joint with the welding section are formed at a side closer to the welding section. A shoulder part protruding from the edge, and the shoulder parts abut against the corresponding step part to be positioned.

In some embodiments, each terminal further includes an upright arm extending upward from the other end of the welding section and adjacent to the second sidewall surface.

In some embodiments, at least one side of the two sides of the upright arm at the joint with the welding section forms a shoulder that protrudes from the side of the welding section, and the shoulder of the upright arm abuts against the corresponding the steps to be positioned.

In some embodiments, each of the first sidewall surfaces forms a protruding step near the bottom surface, and both sides of the upright arm at the joint with the welding section are formed more than the sides of the welding section A protruding shoulder, and the shoulder of the upright arm abuts against the corresponding step to be positioned.

In some embodiments, the abutting section of each terminal is pressed against the third side wall surface and the upright arm thereof is pressed against the second side wall surface to have a preload force.

In some embodiments, the distal end of the upright arm extends obliquely upward in a direction away from the curved arm to form an inclined end portion against which the upper curved segment is pressed down.

In some embodiments, the width of the inclined end portion is greater than the width of the upper curved section.

In some embodiments, the soldering section has a downward soldering surface for soldering with a solder ball.

In some embodiments, the receptacle connector of the present invention includes an insulating housing and a plurality of terminals. The insulating housing has a first terminal setting part, a second terminal setting part and an isolation part located between the first terminal setting part and the second terminal setting part distributed in a first direction. The terminals are arranged on the first terminal setting portion, the second terminal setting portion and the isolation portion. Wherein, the terminals arranged in the first terminal setting part and the second terminal setting part include a plurality of terminal groups, each terminal group is composed of four terminals and arranged side by side along a second direction perpendicular to the first direction, located in the middle The two terminals on the outer side are used as signal terminals and the two terminals on the outer side are used as the first ground terminals. Wherein, the plurality of terminals provided in the isolation portion are used as the second ground terminals.

In some embodiments, the terminals disposed in the first terminal setting portion and the second terminal setting portion are arranged in one terminal row along the second direction and are arranged in a plurality of terminal rows in the first direction, each terminal The row includes a plurality of terminal groups arranged at intervals along the second direction, and the positions of the terminal groups of adjacent terminal rows are offset in the first direction, and the second ground terminals arranged in the isolation portion are divided into two rows, one of which is A row of second ground terminals is adjacent to the first terminal setting portion, another row of second ground terminals is adjacent to the second terminal setting portion, and the positions of the second ground terminals in different rows are displaced in the first direction and are adjacent thereto The signal terminals of the terminal group are separated by a distance.

In some embodiments, each terminal row further has a terminal as a third ground terminal, and the third ground terminals of adjacent terminal rows are respectively located at two opposite end sides in the second direction and are connected to the same terminal row. The terminal groups are spaced apart.

The present invention has at least the following effects: when the terminal is arranged in the insulating casing, it has relatively stable positioning effect and better signal integrity performance.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are designated by the same reference numerals.

Referring to FIG. 1 to FIG. 4 , the first embodiment of the receptacle connector 100 of the present invention includes an insulating housing 1 and a plurality of terminals 2 disposed on the insulating housing 1 .

As shown in FIG. 3, the insulating housing 1 has a first terminal setting portion A1, a second terminal setting portion A2, and a first terminal setting portion A1 and the second terminal distributed in a first direction D1. The spacer A3 between the parts A2 is provided.

The terminals 2 are arranged on the first terminal setting portion A1 , the second terminal setting portion A2 and the isolation portion A3 . The terminals 2 provided in the first terminal setting portion A1 and the second terminal setting portion A2 include a plurality of terminal groups TG, each terminal group TG is composed of four terminals 2 and is along a second perpendicular to the first direction D1. The two terminals 2 located in the middle are used as the signal terminals S and the two terminals 2 located on the outer side are used as the first ground terminals G1. The plurality of terminals 2 provided in the isolation portion A3 serve as the second ground terminals G2.

In this embodiment, the terminals 2 provided in the first terminal setting portion A1 and the second terminal setting portion A2 are arranged in a terminal row TR along the second direction D2 and arranged in a plurality of terminals in the first direction D1 Row TR, each terminal row TR includes a plurality of terminal groups TG arranged at intervals along the second direction D2, and the positions of the terminal groups TG of adjacent terminal rows TR are displaced in the first direction D1. Each terminal row TR also has a terminal 2 as the third ground terminal G3, and the third ground terminals G3 of the adjacent terminal row TR are respectively located at the two opposite end sides of the second direction D2 and are connected with the same terminal row TR. The terminal groups TG are spaced apart. Specifically, the first terminal setting portion A1 and the second terminal setting portion A2 are respectively provided with four terminal rows TR, and each terminal row TR has four terminal groups TG and one third ground terminal G3. The terminal groups TG of adjacent terminal rows TR are phase-displaced in the first direction D1, so that the signal terminals S of the adjacent terminal rows TR are phase-displaced in the first direction D1, and the signal terminals S are aligned in the first direction D1. The space between the terminal groups TG of its adjacent terminal rows TR. The two first ground terminals G1 of each terminal group TG respectively correspond to the adjacent two terminal groups TG of the adjacent terminal row TR in the first direction D1, and are correspondingly located between the adjacent signal terminals S and the first ground terminals G1. between the location. In the direction shown in FIG. 3 , because the terminal groups TG are staggered in the first direction D1, the adjacent terminal row TR makes the outermost terminal group TG located on one of the left and right sides more protruding, and the terminal group TG is located on the outer side. There is no first ground terminal G1 of the adjacent terminal row TR between the signal terminal S and the first ground terminal G1, so the third ground terminal G3 of each terminal row TR is set on the outer side of the corresponding adjacent terminal row TR. The position between the signal terminal S and the first ground terminal G1 is such that each terminal group TG can correspond to the two ground terminals of the adjacent terminal row TR, so as to avoid imbalance between the two signal terminals S of the terminal group TG.

In this embodiment, the terminals 2 provided in the first terminal setting part A1 and the second terminal setting part A2 are respectively used for transmitting signals and receiving signals, and the first terminal setting parts A1 and The second terminal arrangement portion A2 is separated, so as to have better NEXT isolation. The second ground terminal G2 disposed on the isolation portion A3 is used for crosstalk blocking. Specifically, the second ground terminals G2 disposed in the isolation portion A3 are divided into two rows, wherein one row of the second ground terminals G2 is adjacent to the first terminal setting portion A1, and the other row of the second ground terminals G2 is in phase with the first terminal setting portion A1. Adjacent to the second terminal setting portion A2, the positions of the second ground terminals G2 in different rows are displaced in the first direction D1 and spaced apart from the signal terminals S of the nearby terminal group TG by a distance. Thereby, the second ground terminal G2 is far away from the signal terminal S to avoid affecting the signal integrity performance originally designed by the signal terminal S.

Referring to FIGS. 5 , 6 and 9 , the insulating case 1 has a bottom surface 11 , a top surface 12 opposite to the bottom surface 11 , and a plurality of terminal grooves 13 . Each terminal groove 13 is used for accommodating a terminal 2 and has a positioning groove portion 131 extending through the bottom surface 11 and the top surface 12 and a receiving groove portion extending laterally from the positioning groove portion 131 and passing through the top surface 12 132. And the wall surface defining the positioning groove portion 131 includes two first sidewall surfaces 131a spaced apart and opposite to each other, a second sidewall surface 131b connecting one side of the first sidewall surfaces 131a, and a connecting the first sidewall surfaces 131b. 131a and a third sidewall surface 131c opposite to the second sidewall surface 131b with an interval. At least one of the first sidewall surfaces 131a forms a protruding step portion 131d near the bottom surface 11 . In this embodiment, the first sidewall surfaces 131a each form a protrusion near the bottom surface 11 . the step portion 131d. The height of the third side wall surface 131c is lower than that of the second side wall surface 131b so that the positioning groove portion 131 communicates with the receiving groove portion 132 . A wall surface defining the receiving groove portion 132 includes a bottom wall surface 132a facing the top surface 12 and in contact with the third side wall surface 131c, and the bottom wall surface 132a forms a convex portion 132b adjacent to the third side wall surface 131c . In this embodiment, the accommodating groove portions 132 of the four terminal grooves 13 for accommodating the same terminal group TG (see FIG. 3 ) are communicated with each other.

Referring to FIG. 7 to FIG. 9 , each terminal 2 includes a welding section 21 , a standing arm 22 and a bending arm 23 . The welding section 21 has a welding portion 213 , a first end portion 211 and a second end portion 212 respectively located at opposite ends of the welding portion 213 and extending upward. The soldering portion 213 has a downward soldering surface 213a for soldering with a solder ball 3 . The upright arm 22 extends upward from the first end portion 211 . The curved arm 23 has an abutting section 231 extending upward from the second end 212 , a lower curved section 232 extending obliquely upward from the abutting section 231 in a direction away from the upright arm 22 , a lower curved section 232 extending from the bottom The bending section 232 first extends away from the upright arm 22 and then reversely bends an elastic bending section 233 extending obliquely upward toward the upright arm 22, an upper bending section 234 extending upward from the elastic bending section 233, and A contact section 235 extends upward from the upper curved section 234 .

At least one of the upright arm 22 and the curved arm 23 forms a shoulder 24 protruding from the side of the welding section 21 on at least one side of the two sides at the joint with the welding section 21 . In this embodiment, , the upright arm 22 and the curved arm 23 form a shoulder 24 protruding from the side of the welding section 21 on both sides of the joint with the welding section 21, and the shoulder 24 of the curved arm 23 is located at the Where the abutting section 231 meets the welding section 21 . When the terminal 2 is disposed in the corresponding terminal slot 13, the welding section 21 is adjacent to the bottom surface 11, the abutting section 231 is pressed against the third side wall surface 131c, and the upright arm 22 is pressed against the second side wall surface 131b, thereby having a predetermined Loading force, the two shoulders 24 of the upright arm 22 abut against the two stepped portions 131d (see FIG. 10 ) respectively, and the two shoulders 24 of the curved arm 23 also abut against the two stepped portions 131d (see FIG. 11 ) respectively, so that the terminal 2 It is firmly positioned in the terminal slot 13 . In addition, increasing the width of the abutment section 231 by forming the shoulder 24 on the abutment section 231 reduces impedance to increase signal integrity performance.

The contact section 235 is located above the upright arm 22 and moves downward under pressure so that the upper curved section 234 contacts the upright arm 22 . In this embodiment, the distal end of the upright arm 22 extends obliquely upward in the direction away from the curved arm 23 to form an inclined end portion 221 against which the upper curved segment 234 is pressed down. The width of the inclined end portion 221 is greater than the width of the upper curved section 234 to ensure that the upper curved section 234 can indeed contact the inclined end portion 221 to form an electrical connection.

The elastic bending section 233 extends into the receiving groove 132, and the lower bending section 232 is close to the convex section 132b. When the contact section 235 is pressed, the elastic bending section 233 is also linked, and the convex section 132b supports the elastic bending section 233. The lower bending section 232 can prevent the elastic bending section 233 from being close to or contacting the bottom wall 132a, thereby preventing the elastic bending section 233 from being close to or contacting the insulating housing 1 (plastic) and slowing down the conduction speed.

12 to 15 , the second embodiment of the receptacle connector 100 of the present invention differs from the first embodiment in that, in the second embodiment, each terminal 2 does not have the upright arm 22 and the welding segment 21 does not have The other structures of the first end portion 211 connected to the upright arm 22 are the same as those of the first embodiment, and will not be repeated here.

However, the above are only examples of the present invention, and should not limit the scope of the present invention. Any simple equivalent changes and modifications made according to the scope of the application for patent of the present invention and the content of the patent specification are still within the scope of the present invention. within the scope of the invention patent.

100·· Receptacle Connectors 1・・・Insulating case 11... Bottom 12... top surface 13・・Terminal slot 131·· Positioning groove 131a · The first side wall 131b · Second side wall 131c · The third side wall 131d · Steps 132·· Receptacle 132a · Bottom wall 132b · Convex 2・・・Terminal 21・・・Welding segment 211·· First End 212·· Second End 213·· Welding Department 213a · Welding surface 22... Upright Arm 221·· Sloped ends 23... Bending arm 231·· Abutment Section 232» Lower Bend 233·· Elastic Bending Segments 234» Upper Bend 235» Contact Segment 24・・Shoulder 3・・・ Tin Ball A1... 1st terminal setting part A2...Second terminal setting part A3... Isolation Department D1... first direction D2... Second direction G1... First ground terminal G2・・・Second ground terminal G3... 3rd ground terminal S···· Signal terminal TG・・Terminal group TR・・Terminal block

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: 1 is a perspective view of a first embodiment of a socket connector of the present invention; FIG. 2 is a perspective view of FIG. 1 from another perspective; Figure 3 is a top view of the first embodiment; Figure 4 is an exploded perspective view of the first embodiment; 5 is a top view of the insulating housing of the first embodiment; Fig. 6 is the partial area enlarged view of Fig. 5; 7 is a perspective view of the terminal of the first embodiment; Figure 8 is another perspective view of the terminal of the first embodiment; Fig. 9 is an incomplete sectional view taken along line IX-IX in Fig. 3; Figure 10 is an incomplete cross-sectional view taken along line X-X in Figure 3; Fig. 11 is an incomplete sectional view taken along line XI-XI in Fig. 3; 12 is a fragmentary perspective view of a second embodiment of the receptacle connector of the present invention; Figure 13 is an incomplete perspective exploded view of the second embodiment; Fig. 14 is another perspective exploded view of Fig. 13; and FIG. 15 is an incomplete cross-sectional view taken along the line XV-XV in FIG. 12 .

2・・・Terminal 21・・・Welding segment 211·· First End 212·· Second End 213·· Welding Department 22... Upright Arm 221·· Sloped ends 23... Bending arm 231·· Abutment Section 232» Lower Bend 233·· Elastic Bending Segments 234» Upper Bend 235» Contact Segment 24・・Shoulder

Claims (22)

A terminal is suitable for being arranged in a terminal groove of an insulating casing, and a protruding step is formed in the terminal groove near the bottom surface. A first end and a second end extending upward; an upright arm extending upward from the first end; and a curved arm having an abutment extending upward from the second end Section, a lower curved section that bends and extends obliquely upward from the abutting section to the direction away from the upright arm, a lower curved section that first extends away from the upright arm and then reversely bends to the direction close to the upright arm to extend obliquely upward The elastic bending section, an upper bending section extending upward from the elastic bending section, and a contact section extending upward from the upper bending section; wherein, at least one of the upright arm and the bending arm is in contact with the At least one side of the two sides where the welding sections meet is formed with a shoulder protruding from the sides of the welding section, and the shoulder is used to abut against the corresponding step to be positioned. The terminal of claim 1, wherein at least one of the upright arm and the curved arm forms a shoulder protruding from the side of the welding section on both sides of the connection with the welding section. The terminal of claim 1, wherein at least one of the two sides of the upright arm and the curved arm at the joint with the welding section forms a shoulder protruding from the side of the welding section. The terminal as claimed in claim 1, wherein both sides of the upright arm and the curved arm at the joint with the welding section are formed to protrude from the sides of the welding section of one shoulder. The terminal of claim 1, wherein the contact section is located above the upright arm and moves downward when pressed to bring the upper curved section into contact with the upright arm. The terminal of claim 5, wherein the end of the upright arm extends obliquely upward in a direction away from the bending arm to form an inclined end portion against which the upper bending section is pressed down. The terminal of claim 6, wherein the width of the inclined end portion is greater than the width of the upper curved section. The terminal of claim 1, wherein the soldering portion has a soldering surface facing downwards for soldering with a solder ball. The terminal of claim 1, wherein the upright arm and the abutting section are used to press against two opposite sidewall surfaces defining the terminal slot respectively to have a preload force. A socket connector, comprising: an insulating shell having a bottom surface, a top surface opposite to the bottom surface, and a plurality of terminal grooves, each terminal groove having a positioning groove portion penetrating the bottom surface and the top surface and a The accommodating groove portion extends laterally from the positioning groove portion and penetrates through the top surface, and the wall surface defining the positioning groove portion includes two first side wall surfaces spaced apart and opposite to each other, a first side wall surface connecting one side of the first side wall surfaces Two sidewall surfaces, and a third sidewall surface connecting the first sidewall surfaces and spaced apart from the second sidewall surface, at least one of the first sidewall surfaces forms a protruding step near the bottom surface , the height of the third side wall surface is lower than that of the second side wall surface so that the positioning groove portion is communicated with the receiving groove portion, and the wall that defines the receiving groove portion The surface includes a bottom wall surface facing the top surface and connected with the third side wall surface, and the bottom wall surface forms a convex portion adjacent to the third side wall surface; and a plurality of terminals, respectively disposed in the terminal grooves , each terminal includes a welding section adjacent to the bottom surface and a bending arm, the bending arm has an abutting section extending upward from one end of the welding section and adjacent to the third side wall surface, a The lower curved section extends from the lower curved section to the direction away from the second side wall surface and then reversely bends to the direction close to the second side wall surface. An elastic bending section extending upward, an upper bending section extending upward from the elastic bending section, and a contact section extending upward from the upper bending section, the abutting section is at two points where the abutting section meets the welding section. At least one side of the sides forms a shoulder protruding from the side of the welding section, and the shoulder abuts against the corresponding step to be positioned. The socket connector of claim 10, wherein each of the first side wall surfaces forms a protruding step near the bottom surface, and the abutting section is formed on both sides of the contact section with the welding section A shoulder protrudes from the side of the welding section, and the shoulders abut against the corresponding step to be positioned. The receptacle connector of claim 10, wherein each terminal further includes an upright arm extending upward from the other end of the welding section and adjacent to the second side wall surface. The socket connector of claim 12, wherein at least one of the two sides of the upright arm at the joint with the welding section forms a shoulder that protrudes from the side of the welding section, and the upright arm is The shoulders abut the corresponding steps to be positioned. The socket connector of claim 12, wherein each of the first sidewall surfaces forms a protruding step near the bottom surface, and the upright arm is formed with a relatively large portion on both sides of the connection with the welding section. A shoulder protrudes from the side of the welding section, and the shoulder of the upright arm abuts against the corresponding step to be positioned. The socket connector of claim 12, wherein the abutting section of each terminal is pressed against the third side wall surface and the upright arm thereof is pressed against the second side wall surface to have a preload force. The socket connector of claim 12, wherein the end of the upright arm extends obliquely upward in a direction away from the curved arm to form an inclined end portion against which the upper curved segment is pressed down. The receptacle connector of claim 16, wherein the width of the beveled end is greater than the width of the upper curved section. The socket connector of claim 10, wherein the soldering segment has a soldering surface facing downwards for soldering with a solder ball. A socket connector, comprising: an insulating housing with a first terminal setting part, a second terminal setting part and a second terminal setting part located between the first terminal setting part and the second terminal setting part distributed in a first direction an isolation part between; and a plurality of terminals, which are arranged in the first terminal setting part, the second terminal setting part and the isolation part, wherein the terminals arranged in the first terminal setting part and the second terminal setting part include A plurality of terminal groups, each terminal group is composed of four terminals and arranged side by side along a second direction perpendicular to the first direction, the two terminals located in the middle are used as signal terminals and the two terminals located on the outer side are used as signal terminals. It is a first ground terminal, wherein a plurality of terminals provided in the isolation portion are used as a second ground terminal. The receptacle connector of claim 19, wherein the terminals provided in the first terminal setting portion and the second terminal setting portion are arranged in one terminal row along the second direction and are arranged in a plurality of terminals in the first direction row, each terminal row includes a plurality of terminal groups arranged at intervals along the second direction and the positions of the terminal groups of adjacent terminal rows are displaced in the first direction, and the second ground terminals provided in the isolation portion are divided into Two rows, one row of second ground terminals is adjacent to the first terminal setting portion, the other row of second ground terminals is adjacent to the second terminal setting portion, and the positions of the second ground terminals in different rows are in the first direction The phases are misaligned and spaced a distance from the signal terminals of the adjacent terminal groups. The socket connector of claim 20, wherein each terminal row further has one terminal as a third ground terminal, and the third ground terminals of adjacent terminal rows are respectively located at two opposite end sides in the second direction And spaced from the terminal group of the same terminal block. The receptacle connector of claim 19, wherein each terminal is the terminal of any one of claims 1 to 9.

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