electrical connectors

Abstract

The present invention discloses an electrical connector that can be matched with a docking connector. The electrical connector includes an insulating body and a first terminal group and a second terminal group accommodated in the insulating body. The first terminal group includes a first row of terminals and a first fixing member, and the second terminal group includes a second row of terminals. The first row of terminals and the second row of terminals form a first docking port. The first row of terminals includes a signal terminal pair that can transmit differential signals and a grounding terminal arranged on one side of the signal terminal pair. Each of the signal terminals includes a tail, a contact portion and a main body. The main body includes a covering portion arranged in the first fixing member and a free portion exposed to the air. The grounding terminal includes a grounding tail, a grounding contact portion and a grounding main body located between the grounding tail and the grounding contact portion. The width dimension of the free portion of the main body is at least twice the width dimension of the grounding main body.

Description

Technical field

[0001] The present invention relates to an electrical connector, and in particular to an electrical connector suitable for transmitting high-speed signals. [Background Technology]

[0002] Please refer to U.S. Patent No. 8,764,464, issued on July 1, 2014, which discloses an electrical connector having a plurality of terminals. These terminals include a plurality of signal terminal pairs and ground terminals located on either side of the signal terminal pairs. A ground coupling assembly is required to electrically connect the ground terminals to adjust the performance of the electrical connector as needed. However, the ground coupling assembly complicates the electrical connector, not only complicating assembly but also increasing the cost of the electrical connector. Therefore, an improved electrical connector is needed to overcome the shortcomings of the existing technology. [Summary of the invention]

[0003] The main purpose of the present invention is to provide an electrical connector capable of transmitting high-speed signals.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an electrical connector that can be matched with a docking connector, the electrical connector comprising an insulating body and a first terminal group and a second terminal group housed in the insulating body, the first terminal group comprising a first row of terminals and a first fixing member for fixing the first row of terminals, the second terminal group comprising a second row of terminals, the first row of terminals and the second row of terminals forming a first docking port, the first row of terminals comprising a signal terminal pair capable of transmitting differential signals and a ground terminal disposed on one side of the signal terminal pair, the signal terminal pair comprising a pair of signal terminals, each of the signal terminals comprising a tail, a contact portion that mates with the docking connector, and a main body portion located between the tail and the contact portion, the main body portion comprising a covering portion disposed in the first fixing member and a free portion exposed to air, the ground terminal comprising a ground tail, a ground contact portion that mates with the docking connector, and a ground main body portion located between the ground tail and the ground contact portion, the width dimension of the free portion of the main body portion being at least twice the width dimension of the ground main body portion.

[0005] Furthermore, the width of the free portion of the signal terminal is greater than the width of the covering portion.

[0006] Furthermore, the length of the free portion of the signal terminal is greater than the length of the covering portion.

[0007] Furthermore, the covering portion includes a first covering portion, a second covering portion and a third covering portion which are spaced apart from each other along the length direction of the terminal, and the sizes and shapes of the first covering portion, the second covering portion and the third covering portion are different.

[0008] Furthermore, the width of the grounding body portion is constant.

[0009] Furthermore, the width of the ground contact portion is greater than the width of the contact portion.

[0010] Furthermore, the second terminal group includes a second fixing member for fixing the second row of terminals, the second row of terminals includes a second signal terminal pair for transmitting differential signals and a second grounding terminal arranged on one side of the second signal terminal pair, the second signal terminal pair includes a pair of second signal terminals, each of the second signal terminals includes a second tail, a second contact portion mating with the docking connector, and a second main body portion located between the second tail and the second contact portion, the second main body portion includes a second covering portion arranged in the second fixing member and a second free portion exposed to the air, the second grounding terminal includes a second grounding tail, a second grounding contact portion mating with the docking connector, and a second grounding main body portion located between the second grounding tail and the second grounding contact portion, and the width dimension of the second free portion of the second main body portion is at least twice the width dimension of the second grounding main body portion.

[0011] Furthermore, it further includes a third terminal group and a fourth terminal group, and the third terminal group and the fourth terminal group form a second docking interface.

[0012] Furthermore, the first pair of interfaces and the second pair of interfaces are arranged along the front-to-back direction and are used to connect to the same docking connector.

[0013] Furthermore, the length of the first row of terminals is greater than the length of the second row of terminals.

[0014] Compared with the prior art, the advantages of the present invention are that the width of the free portion of the signal terminal of the present invention is at least twice the width of the grounding body portion, so that it meets the characteristic impedance for transmitting high-speed signals, thereby facilitating the transmission of high-speed signals. At the same time, the present invention has a compact structure, simple assembly, and also reduces the cost of the electrical connector.

Brief Description of the Drawings

[0015] Figure 1 It is a three-dimensional diagram of the electrical connector according to the present invention and the circuit board matched therewith.

[0016] Figure 2 yes Figure 1 A three-dimensional view of the electrical connector and the circuit board mated therewith from another perspective.

[0017] Figure 3 yes Figure 1 A partially exploded view of the electrical connector is shown.

[0018] Figure 4 yes Figure 1 A partially exploded view of the electrical connector is shown.

[0019] Figure 5 yes Figure 4 A further exploded view of the electrical connector is shown.

[0020] Figure 6 yes Figure 5 A further exploded view of the electrical connector is shown.

[0021] Figure 7 yes Figure 6 A perspective view of the electrical connector from another perspective is shown.

[0022] Figure 8 yes Figure 7 A perspective view of the electrical connector from another perspective is shown.

[0023] Figure 9 yes Figure 6 A three-dimensional view of the terminal assembly and upper cover of the electrical connector is shown.

[0024] Figure 10 yes Figure 9 A perspective view of four rows of terminals of an electrical connector is shown.

[0025] Figure 11 yes Figure 10 A perspective view of the four rows of terminals of the electrical connector from another perspective is shown.

[0026] Figure 12 yes Figure 10 A front view of the electrical connector showing four rows of terminals.

[0027] Figure 13 yes Figure 10 Front view of the first of four rows of terminals shown.

[0028] Figure 14 yes Figure 1 The electrical connector is shown as a cross-sectional view along the AA direction.

[0029] Figure 15 yes Figure 1 The electrical connector is shown in a cross-sectional view along line BB.

[0030]

Main component symbol description

[0031] Electrical connector 100 Circuit board 200

[0032] Insulation body 50 guide groove 68

[0033] First terminal group 1 Second terminal group 2

[0034] Third terminal group 3 Fourth terminal group 4

[0035] Main body 6 Upper cover 7

[0036] Front side 601 Rear side 603

[0037] Side wall 61 Bottom wall 65

[0038] First installation slot 610 Second installation slot 620

[0039] Third mounting slot 630 Fourth mounting slot 640

[0040] Cover 70 Mounting portion 71

[0041] Slanted push portion 73 Positioning hole 701

[0042] First row of terminals 10 First fixing member 13

[0043] Signal terminal pair 101 Ground terminal 120

[0044] Signal terminal 110 tail 113

[0045] Contact part 115 Main body part 117

[0046] Covered portion 140 Free portion 150

[0047] Horizontal portion 118 Connecting portion 119

[0048] First covering portion 141 Second covering portion 142

[0049] The third covering portion 143 and the first fixing portion 131

[0050] Second fixing portion 132 Third fixing portion 133

[0051] Positioning column 180 First mounting portion 137

[0052] Ground tail 123 Ground contact portion 125

[0053] Grounding body 127 Grounding cover 128

[0054] Ground free portion 129 Second row of terminals 20

[0055] Second fixing member 23 Second signal terminal pair 201

[0056] Second ground terminal 220 Second signal terminal 210

[0057] Second signal tail 213 Second contact portion 215

[0058] Second main body portion 217 Second covering portion 240

[0059] Second free portion 250 Second ground tail 223

[0060] Second ground contact portion 225 Second ground main portion 227

[0061] Second mounting portion 237 Third row of terminals 30

[0062] The third fixing member 33 and the third signal terminal pair 301

[0063] Third ground terminal 320 Third tail portion 330

[0064] The third front fixing member 331 The third rear fixing member 333

[0065] Third signal terminal 310 Third mounting portion 337

[0066] Fourth row of terminals 40 Fourth fixing member 43

[0067] Fourth signal terminal pair 401 Fourth ground terminal 420

[0068] Fourth signal terminal 410 Fourth tail portion 430

[0069] Fourth front fixing member 431 Fourth rear fixing member 433

[0070] First pair of interfaces 8 Second pair of interfaces 9

[0071] First tail portion 130 Second tail portion 230

[0072] Fourth mounting portion 437 Partition wall 69

[0073] Inclined portion 108 Vertical portion 109 The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. [Specific implementation method]

[0074] Please refer to Figures 1 to 15As shown, the electrical connector 100 of the present invention can be mounted on an external circuit board 200 and can be mated with a mating connector (not shown). The electrical connector 100 includes an insulating body 50 and a terminal group disposed within the insulating body 50. The terminal group includes a first terminal group 1, a second terminal group 2, a third terminal group 3, and a fourth terminal group 4. For ease of understanding, the present invention defines the direction in which the electrical connector 100 and the mating connector are connected as the front-to-back direction, the direction in which the electrical connector 100 is mounted on the circuit board 200 as the up-to-down direction, and the direction perpendicular to the front-to-back and up-to-down directions as the left-to-right direction.

[0075] The insulating housing 50 includes a main body 6 and a top cover 7 that mates with the main body 6. The main body 6 includes a front side 601 located at the front, which interfaces with the docking connector, and a rear side 603 opposite the front side 601. The main body 6 is provided with left and right side walls 61 extending from the front side 601 to the rear side 603, and a bottom wall 65 connecting the side walls 61 and disposed at the bottom. The side walls 61 extend rearward beyond the bottom wall 65. The top of the main body 6 mates with the top cover 7. The opposing inner sides of the side walls 61 are provided with a first mounting slot 610, a second mounting slot 620 located above the first mounting slot 610, a third mounting slot 630 located above the second mounting slot 620, and a fourth mounting slot 640 located above the third mounting slot 630. The top cover 7 includes a cover body 70 and mounting portions 71 formed on both sides of the cover body 70. A downwardly slanted push portion 73 is provided at the rear of the cover body 70. The lower surface of the cover body 70 is provided with a plurality of positioning holes 701 , and the mounting portions 71 are engaged with the corresponding fourth mounting grooves 640 on the two side walls 61 .

[0076] The first terminal group 1 includes a first row of terminals 10 arranged in a left-right direction and a first fixing member 13 for securing the first row of terminals 10. The first row of terminals 10 includes a pair of signal terminals 101 capable of transmitting differential signals and a ground terminal 120 located on one side of the signal terminal pair. In this embodiment, the ground terminal 120 is spaced apart from the signal terminal pair 101. The signal terminal pair 101 includes a pair of signal terminals 110. The center-to-center distance between the pair of signal terminals 110 is no greater than the center-to-center distance between the corresponding positions of the ground terminal 120 and its adjacent signal terminal 110. In the present invention, center-to-center distance refers to the distance between the centerline of one terminal and the centerline of the corresponding portion of the other terminal. Each signal terminal 110 includes a tail portion 113 electrically connectable to an external circuit board 200, a contact portion 115 mating with a mating connector, and a main body portion 117 located between the tail portion 113 and the contact portion 115. The main body portion 117 includes a covering portion 140 disposed within the first fixing member 13 and a free portion 150 exposed to air. The width of the free portion 150 of the signal terminal 110 is greater than the width of the covering portion 140. The contact portions 115 of the pair of signal terminals 110 of the signal terminal pair 101 have a first center-to-center distance L1, a second center-to-center distance L2, and a third center-to-center distance L3. The second center-to-center distance L2 is less than the first center-to-center distance L1, and the third center-to-center distance L3 is greater than the second center-to-center distance L2. The third center-to-center distance L3 is no greater than the first center-to-center distance L1. The main body 117 includes a horizontal portion 118 extending horizontally and rearward from the contact portion 115 and a connecting portion 119 connecting the horizontal portion 118 and the tail portion 113. The connecting portion 119 includes an inclined portion 108 extending obliquely downward and downward, and a vertical portion 109 connecting the inclined portion 108 and the tail portion. The covering portion 140 includes a first covering portion 141, a second covering portion 142, and a third covering portion 143 spaced apart along the length. The first, second, and third covering portions 141, 142, and 143 all have different sizes and shapes. The first and second covering portions 141, 142 are located on the horizontal portion 118, while the third covering portion 143 is located on the vertical portion 109. The grounding terminal 120 includes a grounding tail 123 electrically connectable to the external circuit board 200, a grounding contact portion 125 adapted to mate with a mating connector, and a grounding body 127 disposed between the grounding contact portion 125 and the grounding tail 123. The grounding body 127 includes a grounding covering portion 128 encased in the first fixture 13 and a grounding free portion 129 exposed to air. The grounding covering portion 128 and the grounding free portion 129 are aligned with the corresponding covering portion 140 and free portion 150 of the signal terminal 110 in the left-right direction.The grounding cover portion 128 and the grounding free portion 129 exposed to air of the grounding main body 127 have the same width and are constant along the entire length. The width of the grounding contact portion 125 is greater than the width of the contact portion 115 of the signal terminal 110. The width of the free portion 150 of the main body 117 of the signal terminal 110 is at least twice the width of the grounding main body 127. The distance between the free portions 150 of the two signal terminals 110 of the signal terminal pair 101 is less than the distance between the corresponding grounding free portions 129 of the signal terminal 110 and the adjacent ground terminal 120. The main body 6 includes a plurality of guide grooves 68 at the front for accommodating the contact portions 115 of the signal terminals 110 and the grounding contact portions 125 of the grounding terminals 120, and partition walls 69 separating the guide grooves 68. The partition walls 69 between the grounding terminals 120 and the adjacent signal terminals 110 extend rearward beyond the partition walls 69 between the corresponding signal terminal pairs 101 of the signal terminals 110.

[0077] The first fixing member 13 includes a first fixing portion 131 disposed on the first covering portion 141, a second fixing portion 132 disposed on the second covering portion 142, and a third fixing portion 133 disposed on the third covering portion 143. The free portion 150 of the signal terminal 110 is longer than the length of the covering portion 140, maximizing exposure of the signal terminal 110 to air. This adjusts the characteristic impedance of the signal terminal 110 and enables high-speed signal transmission. In this embodiment, the free portion 150 accounts for at least 70% of the size of the main body 117 along the length of the signal terminal 110. The first and second fixing portions 131, 132 of the first fixing member 13 are arranged horizontally, while the third fixing portion 133 is arranged vertically. Several positioning posts 180 are provided on the upper surfaces of the first and second fixing portions 131, 132, which engage with the positioning holes 701. First mounting portions 137 are provided on the left and right sides of the first and second fixing portions 131, 132. The first mounting portion 137 engages with the third mounting slot 630. After the first terminal assembly 1 and the upper cover 7 are integrally assembled via the positioning posts 180 and the positioning holes, a forward force is applied to the oblique push portion 73 to assemble the first terminal assembly 1 and the upper cover 7 from the rear to the front into the main body 6. The first fixing portion 131 and the second fixing portion 132 are integrally formed to secure the signal terminals 110 and the grounding terminals 120, while the third fixing portion 133 secures the signal terminals 110 and the grounding terminals 120 via thermal rivets. In this embodiment, the first fixing portion 131 is integrally formed with the first covering portion 141 and the corresponding grounding covering portion 128 of the grounding terminal 120 corresponding to the first covering portion 141, the second fixing portion 132 is integrally formed with the second covering portion 142 and the corresponding grounding covering portion 128 of the grounding terminal 120 corresponding to the second covering portion 142, and the third fixing portion 133 is hot-riveted to the third covering portion 143 and the corresponding grounding covering portion 128 of the grounding terminal 120 corresponding to the third covering portion 143.

[0078] The second terminal group 2 includes a second row of terminals 20 arranged in a left-right direction and a second fixing member 23 that secures the second row of terminals 20. The second row of terminals 20 includes a second signal terminal pair 201 for transmitting differential signals and a second ground terminal 220 located on one side of the second signal terminal pair 201. The second signal terminal pair 201 includes a pair of second signal terminals 210. Each second signal terminal 210 includes a second signal tail 213, a second contact portion 215, and a second body portion 217 located between the second signal tail 213 and the second contact portion 215. The second body portion 217 includes a second covering portion 240 disposed within the second fixing member 23 and a second free portion 250 exposed to air. The second ground terminal 220 includes a second ground tail 223, a second ground contact portion 225 that mates with a mating connector, and a second ground body portion 227 located between the second ground tail 223 and the second ground contact portion 225. The second fixing member 23 is integrally formed to secure the second signal terminals 210 and the second ground terminals 220. The second fixing member 23 has second mounting portions 237 on both sides, which engage with the first mounting slot 610. The width of the second free portion 250 of the second signal terminal 210 is at least twice the width of the second grounding body 227.

[0079] The third terminal group 3 includes a third row of terminals 30 arranged in a left-right direction and a third fixing member 33 fixed to the third row of terminals 30. The third row of terminals 30 includes a third signal terminal pair 301 for transmitting differential signals and a third ground terminal 320 located on either side of the third signal terminal pair 301. The third signal terminal pair 301 includes a pair of third signal terminals 310. The third row of terminals 30 includes a third tail portion 330 that can be soldered to the circuit board 200. The third fixing member 33 includes a third front fixing member 331 and a third rear fixing member 333 spaced apart from each other. The third rear fixing member 333 is located adjacent to the third tail portion 330. The third front fixing member 331 is integrally formed with the third signal terminal 310 and the third ground terminal 320. The third rear fixing member 333 is thermally riveted to the third signal terminal 310 and the third ground terminal 320. Third mounting portions 337 are provided on both sides of the third front fixing member 331, which engage with the third mounting slot 630.

[0080] The fourth terminal group 4 includes a fourth row of terminals 40 arranged in a horizontal direction and a fourth fixing member 43 disposed on the fourth row of terminals 40. The fourth row of terminals 40 includes a fourth signal terminal pair 401 for transmitting differential signals and a fourth ground terminal 420 disposed on either side of the fourth signal terminal pair 401. The fourth signal terminal pair 401 includes a pair of fourth signal terminals 410. The fourth row of terminals 40 includes a fourth tail portion 430 that can be soldered to the circuit board 200. The fourth fixing member 43 includes a fourth front fixing member 431 and a fourth rear fixing member 433 spaced apart from each other. The fourth rear fixing member 433 is located adjacent to the fourth tail portion 430. The fourth front fixing member 431 is integrally formed with the fourth signal terminal 410 and the fourth ground terminal 420. The fourth rear fixing member 433 is thermally riveted to the fourth signal terminal 410 and the fourth ground terminal 420. Fourth mounting portions 437 are provided on both sides of the fourth front fixing member 431, which engage with the third mounting slot 630.

[0081] The second terminal group 2, the third terminal group 3 and the fourth terminal group 4 are similar to the first terminal group 1, except that the dimensions along the length direction of the terminals are different. The dimensions of the first terminal group 1 along the length direction are larger than the dimensions of the second terminal group 2, the third terminal group 3 and the fourth terminal group 4 along the length direction. The first row of terminals 10 of the first terminal group 1 and the second row of terminals 20 of the second terminal group 2 form a first docking interface 8. The third terminal group 3 and the fourth terminal group 4 form a second docking interface 9, and the first docking interface 8 and the second docking interface 9 are arranged in the front-to-back direction for docking with the same docking connector. The first terminal group 1 and the upper cover 7 are combined into a whole and assembled into the main body 6 from the back side to the front. The second terminal group 2, the third terminal group 3 and the fourth terminal group 4 are all installed on the main body 6 from the back side 603 to the front. Specifically, in this embodiment, the second mounting portion 237 of the second terminal group 2 is installed from back to front into the first mounting groove 610, the fourth mounting portion 437 of the fourth terminal group 4 is installed from back to front into the second mounting groove 620, the third mounting portion 337 of the third terminal group 3 and the first mounting portion 137 of the first terminal group 1 are both installed from back to front into the third mounting groove 630, and the mounting portion 71 of the upper cover 7 cooperates with the fourth mounting groove 640. The tail 113 of the signal terminal 110 and the ground tail 123 of the ground terminal of the first terminal group 1 are arranged in the left-right direction to form a first tail 130, the second signal tail 213 of the second signal terminal 210 and the second ground tail 223 of the second ground terminal 220 of the second terminal group 2 are arranged in the left-right direction to form a second tail 230, the third terminal group 3 includes a third tail 330, and the fourth terminal group 4 includes a fourth tail 430. When the terminal groups are assembled into the main body 6, the second tail 230, the fourth tail 430, the third tail 330 and the first tail 130 are arranged in order from front to back.

[0082] The assembly method of the electrical connector 100 includes the following steps:

[0083] Providing the main body 6;

[0084] Providing the upper cover 7;

[0085] Providing the first terminal group 1, the second terminal group 2, the third terminal group 3 and the fourth terminal group 4;

[0086] Install the second terminal group 2 in the first installation groove 610 of the main body 6 from the rear side 603 to the front;

[0087] Install the fourth terminal group 4 in the second installation groove 620 of the main body 6 from the rear side 603 to the front;

[0088] Install the first terminal group 1 and the upper cover 7 as a whole from the rear side 603 to the front part in the third mounting groove 630 and the fourth mounting groove 640 of the main body 6, so that the first terminal group 1 fits in the third mounting groove 630 and the upper cover 7 fits in the fourth mounting groove 640;

[0089] Install the third terminal group 3 in the third installation groove 630 from the back side to the front side;

[0090] The first terminal group 1 and the upper cover 7 are fixed together as a whole and then assembled from the rear side to the front side to a predetermined position.

[0091] The electrical connector of the present invention improves the signal transmission rate of the connector by changing the center distance between a pair of signal terminals of the signal terminal pair; exposing the signal terminals to the air as much as possible to adjust the characteristic impedance of the signal terminals, and the connector of the present invention is assembled into one piece by assembling the upper cover and the first terminal group into the main body, so that the longer first terminal group is assembled into the main body through the upper cover, making the electrical connector structure more compact, simple and convenient to assemble, and also reducing the cost of the electrical connector. The electrical connector 100 of this embodiment complies with the specification of QSFP-DD, which defines 8 transmitting channels and 8 receiving channels, and the signal transmission rate of each channel can reach 100Gbps. Of course, the present invention can also be applied to high-speed electrical connectors with high transmission rates such as SFP-DD, SFP, OSFP, etc.

[0092] The above description is only one embodiment of the present invention, not all or the only embodiment. Any equivalent changes made to the technical solution of the present invention by ordinary technicians in this field after reading the specification of the present invention shall be claims of the present invention.

Claims

1. An electrical connector capable of mating with a docking connector, the electrical connector comprising an insulating body and a first terminal group and a second terminal group housed within the insulating body, the first terminal group comprising a first row of terminals and a first fixing member securing the first row of terminals, the second terminal group comprising a second row of terminals, the first row of terminals and the second row of terminals forming a first mating interface, the first row of terminals comprising a signal terminal pair capable of transmitting differential signals and a ground terminal disposed on one side of the signal terminal pair, the signal terminal pair comprising a pair of signal terminals, each signal terminal comprising a tail portion, a contact portion mating with the docking connector, and a main body portion located between the tail portion and the contact portion, the main body portion comprising a covering portion disposed in the first fixing member and a free portion exposed to air, the ground terminal comprising a ground tail portion, a ground contact portion mating with the docking connector, and a ground main body portion located between the ground tail portion and the ground contact portion, characterized in that: The width of the free portion of the main body is at least twice the width of the grounding main body, and the width of the portion of the grounding main body covered by the first fixing member and the portion exposed to the air are the same and constant in the entire length direction.

2. The electrical connector according to claim 1, wherein: The width of the free portion of the signal terminal is greater than the width of the covering portion.

3. The electrical connector according to claim 2, wherein: The length of the free portion of the signal terminal is greater than the length of the covering portion.

4. The electrical connector according to claim 3, wherein: The covering portion includes a first covering portion, a second covering portion and a third covering portion which are spaced apart from each other along the length direction of the terminal. The sizes and shapes of the first covering portion, the second covering portion and the third covering portion are different.

5. The electrical connector according to claim 4, wherein: The width of the ground contact portion is greater than the width of the contact portion.

6. The electrical connector according to claim 1, wherein: The second terminal group includes a second fixing member for fixing the second row of terminals, the second row of terminals includes a second signal terminal pair for transmitting differential signals and a second grounding terminal arranged on one side of the second signal terminal pair, the second signal terminal pair includes a pair of second signal terminals, each of the second signal terminals includes a second tail, a second contact portion that cooperates with the docking connector, and a second main body portion located between the second tail and the second contact portion, the second main body portion includes a second covering portion arranged in the second fixing member and a second free portion exposed to the air, the second grounding terminal includes a second grounding tail, a second grounding contact portion that cooperates with the docking connector, and a second grounding main body portion located between the second grounding tail and the second grounding contact portion, and the width dimension of the second free portion of the second main body portion is at least twice the width dimension of the second grounding main body portion.

7. The electrical connector according to claim 6, wherein: It further includes a third terminal group and a fourth terminal group, and the third terminal group and the fourth terminal group form a second docking interface.

8. The electrical connector according to claim 7, wherein: The first pair of interfaces and the second pair of interfaces are arranged along the front-to-back direction and are used for connecting to the same docking connector.

9. The electrical connector according to claim 6, wherein: The length of the first row of terminals is greater than the length of the second row of terminals.

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