Electrical connector

Abstract

The present invention discloses an electrical connector which can cooperate with a docking connector. The electrical connector includes an insulating body, a first terminal group and a second terminal group received in the insulating body. The first terminal group includes a first row of terminals and a first fixing member. 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 signal terminal pairs and a ground terminal disposed on one side of the signal terminal pairs. Each of the signal terminals includes a tail portion, a contact portion and a main body portion. The main body portion includes a coated portion disposed in the first fixing member and a free portion exposed to the air. There is a first center distance between the contact portions of the signal terminal pairs, a second center distance between the free portions, and a third center distance between the coated portions. The second center distance is less than the first center distance, and the third center distance is greater than the second center distance.

Description

Technical Field

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

Background Art

[0002] Please refer to U.S. Patent No. US8764464 announced on July 1, 2014, which discloses an electrical connector provided with a plurality of terminals. The terminals include a plurality of signal terminal pairs and ground terminals located on both sides of the signal terminal pairs, and a ground coupling component is required to be electrically connected to the ground terminals to adjust the performance of the electrical connector as needed. However, the ground coupling component makes the electrical connector complex in composition, not only complex to assemble but also increasing the cost of the electrical connector. Therefore, an improved electrical connector is needed to overcome the deficiencies of the prior art.

Summary of the Invention

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

[0004] To achieve the above object, the present invention adopts the following technical solutions: An electrical connector is adapted to cooperate with a mating connector. The electrical connector includes an insulating body, a first terminal group and a second terminal group received in the insulating body. The first terminal group includes a first row of terminals and a first fixing member for fixing the first row of terminals. 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 signal terminal pairs capable of transmitting differential signals and ground terminals disposed on one side of the signal terminal pairs. Each of the signal terminal pairs includes a pair of signal terminals. Each of the signal terminals includes a tail portion, a contact portion for mating with the mating connector, and a body portion located between the tail portion and the contact portion. The body portion includes a coated portion disposed in the first fixing member and a free portion exposed to the air. There is a first center distance between the contact portions of the signal terminal pairs, a second center distance between the free portions, and a third center distance between the coated portions. The second center distance is less than the first center distance, and the third center distance is greater than the second center distance.

[0005] Further, the third center distance is not greater than the first center distance.

[0006] Further, along the length direction of the signal terminal, the size of the free portion accounts for at least 70% of the size of the body portion.

[0007] Further, the width of the free portion of the signal terminal is greater than the width of the coated portion.

[0008] Further, the coated portion includes a first coated portion, a second coated portion, and a third coated portion spaced along the length direction of the terminal.

[0009] Further, the main body portion includes a horizontal portion extending horizontally backward from the contact portion and a connecting portion connecting the horizontal portion and the tail portion. The first covering portion and the second covering portion are disposed on the horizontal portion, and the third covering portion is disposed on the connecting portion.

[0010] Further, the fixing member includes a first fixing portion disposed on the first covering portion, a second fixing portion disposed on the second covering portion, and a third fixing portion disposed on the third covering portion. The first fixing portion is integrally formed with the first covering portion, the second fixing portion is integrally formed with the second covering portion, and the third fixing portion is thermally riveted to the third covering portion.

[0011] Further, the center distance between a pair of signal terminals of the signal terminal pair is not greater than the center distance at the corresponding position between the ground terminal and its adjacent signal terminal.

[0012] Further, the ground terminal includes a ground tail portion, a ground contact portion adapted to the docking connector, and a ground main body portion between the ground contact portion and the ground tail portion. The width of the ground main body portion is the same and constant.

[0013] Further, the insulating body includes a plurality of guiding grooves for receiving the contact portion and the ground contact portion, and partition walls separating the respective guiding grooves. The partition wall between the ground terminal and its adjacent signal terminal extends backward beyond the partition wall between the corresponding signal terminal pairs of the signal terminals.

[0014] Compared with the prior art, the advantages of the present invention are as follows: the second center distance of the present invention is less than the first center distance, and the third center distance is greater than the second center distance, so that the characteristic impedance for transmitting high-speed signals is satisfied, thereby facilitating the transmission of high-speed signals. At the same time, the structure of the present invention is compact, the assembly is simple, and the cost of the electrical connector is also reduced.

Description of the Drawings

[0015] Figure 1 is a perspective view of an electrical connector according to the present invention and a circuit board cooperating therewith.

[0016] Figure 2 is Figure 1 a perspective view of the electrical connector shown and the circuit board cooperating therewith from another perspective.

[0017] Figure 3 is Figure 1 a partial exploded view of the electrical connector shown.

[0018] Figure 4 is Figure 1 a partial exploded view of the electrical connector shown.

[0019] Figure 5 is Figure 4 a further exploded view of the electrical connector shown

[0020] Figure 6 is Figure 5 a further exploded view of the electrical connector shown

[0021] Figure 7 is Figure 6 a perspective view of the electrical connector shown from another angle

[0022] Figure 8 is Figure 7 a perspective view of the electrical connector shown from another angle

[0023] Figure 9 is Figure 6 a perspective view of the terminal assembly and the upper cover of the electrical connector shown

[0024] Figure 10 is Figure 9 a perspective view of the four - row terminals of the electrical connector shown

[0025] Figure 11 is Figure 10 a perspective view of the four - row terminals of the electrical connector shown from another angle

[0026] Figure 12 is Figure 10 a front view of the four - row terminals of the electrical connector shown

[0027] Figure 13 is Figure 10 a front view of the first row of terminals in the four - row terminals shown

[0028] Figure 14 is Figure 1 a sectional view of the electrical connector along the A - A direction shown

[0029] Figure 15 is Figure 1 a sectional view of the electrical connector along the B - B direction shown

[0030]

Description of Main Component Symbols

[0031] Electrical connector 100 Circuit board 200

[0032] Insulating body 50 Guide groove 68

[0033] First terminal group 1 Second terminal group 2

[0034] Third terminal group 3 Fourth terminal group 4

[0035] Body part 6 Upper cover 7

[0036] Front side 601 Rear side 603

[0037] Side wall 61 Bottom wall 65

[0038] First installation groove 610 Second installation groove 620

[0039] Third installation groove 630 Fourth installation groove 640

[0040] Cover body 70 Installation part 71

[0041] Oblique pushing part 73 Positioning hole 701

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

[0043] Signal terminal pair 101 Grounding terminal 120

[0044] Signal terminal 110 Tail part 113

[0045] Contact part 115 Main body part 117

[0046] Coated part 140 Free part 150

[0047] Horizontal part 118 Connecting part 119

[0048] First coated part 141 Second coated part 142

[0049] Third coated part 143 First fixing part 131

[0050] Second fixing part 132 Third fixing part 133

[0051] Positioning post 180 First installation part 137

[0052] Grounding tail part 123 Grounding contact part 125

[0053] Grounding main body part 127 Grounding coated part 128

[0054] Grounding free part 129 Second row of terminals 20

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

[0056] Second grounding terminal 220 Second signal terminal 210

[0057] Second signal tail part 213 Second contact part 215

[0058] Second main body part 217 Second coated part 240

[0059] Second free part 250, second grounded tail 223

[0060] Second grounding contact part 225, second grounding main body part 227

[0061] Second mounting part 237, third row of terminals 30

[0062] Third fixing part 33, third signal terminal pair 301

[0063] Third grounding terminal 320, third tail 330

[0064] Third front fixing part 331, third rear fixing part 333

[0065] Third signal terminal 310, third mounting part 337

[0066] Fourth row of terminals 40, fourth fixing part 43

[0067] Fourth signal terminal pair 401, fourth grounding terminal 420

[0068] Fourth signal terminal 410, fourth tail 430

[0069] Fourth front fixing part 431, fourth rear fixing part 433

[0070] First pair of interfaces 8, second pair of interfaces 9

[0071] First tail 130, second tail 230

[0072] Fourth mounting part 437, partition wall 69

[0073] Inclined part 108, vertical part 109 The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

Specific Embodiments

[0074] Please refer to Figures 1 to 15 As shown, the electrical connector 100 of the present invention can be mounted on an external circuit board 200 and can cooperate with a docking 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, in the present invention, the direction in which the electrical connector 100 is docked with the docking connector is defined as the front-back direction, the direction in which the electrical connector 100 is mounted on the circuit board 200 is defined as the up-down direction, and the direction perpendicular to the front-back direction and the up-down direction is defined as the left-right direction.

[0075] The insulating body 50 includes a body portion 6 and an upper cover 7 that cooperates with the body portion 6. The body portion 6 includes a front side 601 located at the front and mating with the docking connector, and a rear side 603 opposite to the front side 601. The body portion 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 two side walls 61 and disposed at the bottom. The two side walls 61 extend backward beyond the bottom wall 65. The upper part of the body portion 6 cooperates with the upper cover 7. On the opposite inner side surfaces of the two side walls 61, there are provided a first mounting groove 610, a second mounting groove 620 located above the first mounting groove 610, a third mounting groove 630 located above the second mounting groove 620, and a fourth mounting groove 640 located above the third mounting groove 630. The upper cover 7 includes a cover body 70 and mounting portions 71 formed on both sides of the cover body 70. A slanting pushing portion 73 that slopes downward is provided at the rear of the cover body 70. A plurality of positioning holes 701 are provided on the lower surface of the cover body 70. The mounting portions 71 cooperate 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 the left-right direction and a first fixing member 13 for fixing the first row of terminals 10. The first row of terminals 10 includes a signal terminal pair 101 capable of transmitting differential signals and a ground terminal 120 provided on one side of the signal terminal pair. In this embodiment, the ground terminal 120 and the signal terminal pair 101 are arranged at intervals. The signal terminal pair 101 includes a pair of signal terminals 110. The center distance between the pair of signal terminals 110 is not greater than the center distance between the ground terminal 120 and the corresponding position of the adjacent signal terminal 110. In the present invention, the center distance refers to the distance between the center line of one terminal and the center line of the corresponding part of another terminal. Each of the signal terminals 110 includes a tail 113 that can be electrically connected to an external circuit board 200, a contact portion 115 that cooperates with a docking connector, and a main body portion 117 located between the tail 113 and the contact portion 115. The main body portion 117 includes a covered portion 140 provided in the first fixing member 13 and a free portion 150 exposed to the air. The width of the free portion 150 of the signal terminal 110 is greater than the width of the covered portion 140. There is a first center distance L1 between the contact portions 115 of the pair of signal terminals 110 of the signal terminal pair 101, a second center distance L2 between the free portions 150, and a third center distance L3 between the covered portions 140. The second center distance L2 is less than the first center distance L1, and the third center distance L3 is greater than the second center distance L2. The third center distance L3 is not greater than the first center distance L1. The main body portion 117 includes a horizontal portion 118 extending horizontally backward from the contact portion 115 and a connecting portion 119 connecting the horizontal portion 118 and the tail 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. The covered portion 140 includes a first covered portion 141, a second covered portion 142, and a third covered portion 143 arranged at intervals along the length direction. The sizes and shapes of the first covered portion 141, the second covered portion 142, and the third covered portion 143 are all different. The first covered portion 141 and the second covered portion 142 are provided on the horizontal portion 118, and the third covered portion 143 is provided on the vertical portion 109. The ground terminal 120 includes a ground tail 123 that can be electrically connected to an external circuit board 200, a ground contact portion 125 that cooperates with a docking connector, and a ground main body portion 127 between the ground contact portion 125 and the ground tail 123. The ground main body portion 127 includes a ground covered portion 128 covered in the first fixing member 13 and a ground free portion 129 exposed to the air. The ground covered portion 128 and the ground free portion 129 are aligned with the corresponding covered portion 140 and free portion 150 of the signal terminal 110 in the left-right direction.The widths of the grounded covering portion 128 and the grounded free portion 129 exposed to air of the grounded main body portion 127 are the same and constant in the entire length direction. The width dimension of the grounding contact portion 125 is greater than the width dimension of the contact portion 115 of the signal terminal 110. The width dimension of the free portion 150 of the main body portion 117 of the signal terminal 110 is at least twice the width dimension of the grounded main body portion 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 signal terminal 110 and the corresponding grounded free portion 129 of the adjacent grounded terminal 120. The main body portion 6 includes a plurality of guiding grooves 68 for receiving the contact portions 115 of the signal terminals 110 and the grounding contact portions 125 of the grounded terminals 120 at the front portion and partition walls 69 separating the respective guiding grooves 68. The partition wall 69 between the grounded terminal 120 and the adjacent signal terminal 110 extends backward beyond the partition wall 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 length dimension of the free portion 150 of the signal terminal 110 is greater than the length dimension of the covering portion 140, so that the signal terminal 110 is exposed to the air as much as possible, thereby adjusting the characteristic impedance of the signal terminal 110 so that the signal terminal 110 can transmit high-speed signals. In this embodiment, along the length direction of the signal terminal 110, the size of the free portion 150 accounts for at least 70% of the size of the main body 117. The first fixing portion 131 and the second fixing portion 132 of the first fixing member 13 are arranged horizontally, and the third fixing portion 133 is arranged vertically. A plurality of positioning columns 180 cooperating with the positioning holes 701 are arranged on the upper surfaces of the first fixing portion 131 and the second fixing portion 132. First mounting portions 137 are arranged on the left and right sides of the first fixing portion 131 and the second fixing portion 132. The first mounting portion 137 is matched with the third mounting groove 630. After the first terminal group 1 and the upper cover 7 are matched into a whole through the positioning column 180 and the positioning hole, a forward force is applied to the oblique push portion 73 to assemble the first terminal group 1 and the upper cover 7 from the rear side to the front side into the main body 6. The first fixing portion 131 and the second fixing portion 132 are integrally formed to fix the signal terminal 110 and the ground terminal 120, and the third fixing portion 133 is fixed by heat riveting to the signal terminal 110 and the ground terminal 120. 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 heat-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 the left - right direction and a second fixing member 23 for fixing 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 provided 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 main body portion 217 located between the second signal tail 213 and the second contact portion 215. The second main body portion 217 includes a second covering portion 240 provided in the second fixing member 23 and a second free portion 250 exposed to the air. The second ground terminal 220 includes a second ground tail 223, a second ground contact portion 225 for mating with a docking connector, and a second ground main body portion 227 located between the second ground tail 223 and the second ground contact portion 225. The second fixing member 23 integrally fixes the second signal terminals 210 and the second ground terminal 220. Second mounting portions 237 are provided on the left and right sides of the second fixing member 23, and the second mounting portions 237 cooperate with the first mounting groove 610. The width dimension of the second free portion 250 of the second signal terminal 210 is at least twice the width dimension of the second ground main body portion 227.

[0079] The third terminal group 3 includes a third row of terminals 30 arranged in the 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 provided on one 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 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 that are spaced apart front and rear. The third rear fixing member 333 is close to the third tail 330. The third front fixing member 331 is integrally formed on the third signal terminals 310 and the third ground terminal 320. The third rear fixing member 333 is thermally riveted to the third signal terminals 310 and the third ground terminal 320. Third mounting portions 337 are provided on the left and right sides of the third front fixing member 331, and the third mounting portions 337 cooperate with the third mounting groove 630.

[0080] The fourth terminal group 4 includes a fourth row of terminals 40 arranged in the left-right direction and a fourth fixing member 43 provided 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 provided on one 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 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 that are spaced apart front and rear. The fourth rear fixing member 433 is close to the fourth tail 430. The fourth front fixing member 431 is integrally formed on 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 left and right sides of the fourth front fixing member 431, and the fourth mounting portions 437 are engaged with the third mounting grooves 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 their dimensions along the length direction of the terminals are different. The dimension of the first terminal group 1 along the length direction is greater 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 pair of interfaces 8. The third terminal group 3 and the fourth terminal group 4 form a second pair of interfaces 9. The first pair of interfaces 8 and the second pair of interfaces 9 are arranged in the front-back direction and are used to dock with the same docking connector. The first terminal group 1 and the upper cover 7 are assembled together as a whole and are assembled into the body part 6 from the rear side forward. The second terminal group 2, the third terminal group 3, and the fourth terminal group 4 are all installed on the body part 6 from the rear side 603 forward. Specifically, in this embodiment, the second mounting portion 237 of the second terminal group 2 is installed into the first mounting groove 610 from the rear to the front, the fourth mounting portion 437 of the fourth terminal group 4 is installed into the second mounting groove 620 from the rear to the front, 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 into the third mounting groove 630 from the rear to the front, and the mounting portion 71 of the upper cover 7 cooperates with the fourth mounting groove 640. The tails 113 of the signal terminals 110 of the first terminal group 1 and the grounding tails 123 of the grounding terminals are arranged in a first tail 130 in the left-right direction. The second signal tails 213 of the second signal terminals 210 of the second terminal group 2 and the second grounding tails 223 of the second grounding terminals 220 are arranged in a second tail 230 in the left-right direction. The third terminal group 3 includes a third tail 330, and the fourth terminal group 4 includes a fourth tail 430. After the respective terminal groups are assembled into the body part 6, the second tail 230, the fourth tail 430, the third tail 330, and the first tail 130 are arranged in the order from the front to the rear.

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

[0083] Provide the body part 6;

[0084] Provide the upper cover 7;

[0085] Provide 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 into the first mounting groove 610 of the body part 6 from the rear side 603 forward;

[0087] Install the fourth terminal group 4 into the second mounting groove 620 of the body part 6 from the rear side 603 forward;

[0088] First, the integral body formed by fixing the first terminal group 1 and the upper cover 7 is installed from the rear side 603 to the front part in the third installation groove 630 and the fourth installation groove 640 of the main body part 6, so that the first terminal group 1 cooperates with the third installation groove 630, and the upper cover 7 cooperates with the fourth installation groove 640;

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

[0090] Further assemble the integral body formed by fixing the first terminal group 1 and the upper cover 7 from the rear side to the front to a predetermined position.

[0091] In the present invention, the electrical connector adjusts the characteristic impedance of the signal terminals by changing the center distance between a pair of signal terminals of the signal terminal pair, and exposes the signal terminals to the air as much as possible, thereby improving the signal transmission rate of the connector. And the connector of the present invention assembles the upper cover and the first terminal group into one body and then assembles them into the main body part. The longer first terminal group is assembled into the main body part through the upper cover, making the structure of the electrical connector more compact, the assembly simple and convenient, and at the same time reducing the cost of the electrical connector. The electrical connector 100 of this embodiment complies with the QSFP-DD specification, which defines 8 transmit channels and 8 receive channels, and the signal transmission rate of each channel can reach 100 Gbps. Of course, the present invention can also be applied to high-speed electrical connectors with similar high transmission rates such as SFP-DD, SFP, and OSFP.

[0092] The above is only one implementation manner of the present invention, not all or the only implementation manner. Any equivalent changes made by those of ordinary skill in the art to the technical solution of the present invention by reading the specification of the present invention are covered by the claims of the present invention.

Claims

1. An electrical connector capable of mating with a docking connector, the electrical connector comprising an insulating body, a first terminal group and a second terminal group received in the insulating body, the first terminal group including a first row of terminals and a first fixing member for fixing the first row of terminals, the second terminal group including 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 including 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 including a pair of signal terminals, each of the signal terminals including a tail portion, a contact portion for mating with the docking connector, and a main body portion located between the tail portion and the contact portion, the main body portion including a covered portion disposed in the first fixing member and a free portion exposed to the air, a first center distance being provided between the contact portions of the signal terminal pair, a second center distance being provided between the free portions, and a third center distance being provided between the covered portions, characterized in that: The second center distance is less than the first center distance, the third center distance is greater than the second center distance, the center distance refers to the distance between the center line of one terminal and the corresponding part of the center line of another terminal, and the second terminal group is assembled into the insulating body from the back to the front.

2. The electrical connector according to claim 1, wherein: The third center distance is not greater than the first center distance.

3. The electrical connector according to claim 1, wherein: Along the length direction of the signal terminal, the dimension of the free part accounts for at least 70% of the dimension of the main body part.

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

5. The electrical connector according to claim 4, characterized in that: The covering part includes a first covering part, a second covering part, and a third covering part that are arranged at intervals along the length direction of the terminal.

6. The electrical connector according to claim 5, wherein: The main body part includes a horizontal part that extends horizontally backward from the self-contact part and a connecting part that connects the horizontal part and the tail part. The first covering part and the second covering part are arranged on the horizontal part, and the third covering part is arranged on the connecting part.

7. The electrical connector according to claim 6, wherein: The fixing member includes a first fixing part arranged on the first covering part, a second fixing part arranged on the second covering part, and a third fixing part arranged on the third covering part. The first fixing part is integrally formed on the first covering part, the second fixing part is integrally formed on the second covering part, and the third fixing part is thermally riveted to the third covering part.

8. The electrical connector according to claim 1, wherein: The center distance between a pair of signal terminals of the signal terminal pair is not greater than the center distance between the ground terminal and the corresponding position of its adjacent signal terminal.

9. The electrical connector according to claim 8, characterized in that: The ground terminal includes a ground tail part, a ground contact part that cooperates with the docking connector, and a ground main body part between the ground contact part and the ground tail part. The width of the ground main body part is the same and constant.

10. The electrical connector according to claim 9, wherein: The insulating body includes a plurality of guiding grooves for accommodating the contact part and the ground contact part and partition walls that separate the guiding grooves. The partition wall between the ground terminal and its adjacent signal terminal extends backward beyond the partition wall between the corresponding signal terminal pairs of the signal terminals.

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