CN102270796B - Electric connector - Google Patents

Abstract

An electrical connector, comprising an insulating body and a plurality of conductive terminals held in the insulating body, the insulating body is provided with a plug-in port for accommodating a butt connector, and the conductive terminals include at least two pairs of differential signal terminals. A terminal, the first terminal is provided with a first contact portion extending forward into the insertion port and a first welding portion located behind the first contact portion along the insertion direction of the butt connector, and the electrical connector also includes a connection An adapter circuit board for the first contact portion and the first soldering portion, the adapter circuit board is provided with conductive lines electrically connected to the first contact portion and the first soldering portion respectively, the adapter circuit board is connected to the two The distance between the two pairs of conductive lines respectively connected to the differential signal terminals along the lateral direction of the insulating body is greater than the distance between the first contact parts of the two pairs of differential signal terminals, so that the two pairs of differential signal terminals can be effectively reduced. crosstalk phenomenon.

Description

electrical connector

【Technical field】

The invention relates to an electrical connector, in particular to an electrical connector capable of high-frequency signal transmission.

【Background technique】

At the end of 2008, the USB Association released the 3.0 version of the USB standard. This kind of USB 3.0 electrical connector is based on the original USB 2.0 electrical connector. 3.0 terminal to improve the transmission rate of the original USB electrical connector.

For the prior art related to the present invention, please refer to a USB 3.0B electrical connector disclosed in Chinese Utility Model Patent No. CN 201374399Y announced on December 30, 2009, which includes an insulating body and is held in the insulating body A number of conductive terminals and a shielding shell covering the insulating body; wherein the conductive terminals include a USB 3.0 terminal on the upper layer for transmitting USB 3.0 signals and a USB 2.0 terminal on the lower layer for transmitting USB 2.0 signals. Each of the USB 3.0 terminals includes a horizontal section extending along the front-to-back direction and a vertical section extending obliquely downward from the rear end of the horizontal section. The transverse section includes a contact portion located at the front end for electrical connection with the mating connector and a holding portion extending backward from the rear end of the contact portion to the rear side of the insulating body. The holding portion extends linearly from the contact portion to facilitate terminals installation and retention. From this point of view, the extension length of the horizontal section of the USB 3.0 terminal is longer, and the distance between adjacent terminals is consistent with the front contact part, so that the distance between adjacent terminals in the horizontal section is small, and the USB 3.0 connector is transmitting For high-frequency signals, crosstalk is prone to occur between two adjacent pairs of differential signal terminals due to the small spacing, which affects the high-frequency performance of the USB 3.0 connector.

Therefore, it is necessary to provide an electrical connector with an improved structure to overcome the above-mentioned defects.

【Content of invention】

The object of the present invention is to provide an electrical connector which can effectively prevent crosstalk to ensure high-frequency signal transmission.

In order to achieve the above object, the present invention adopts the following technical solutions: an electrical connector, including an insulating body and a plurality of conductive terminals held in the insulating body, the insulating body is provided with a socket for receiving a butt connector, the conductive The terminal includes a first terminal including at least two pairs of differential signal terminals, and the first terminal is provided with a first contact portion extending forward into the insertion port and a second contact portion located behind the first contact portion along the insertion direction of the mating connector. A soldering portion, the electrical connector also includes an adapter circuit board connecting the first contact portion and the first soldering portion, and the adapter circuit board is provided with electrical connections to the first contact portion and the first soldering portion respectively. The distance between the two pairs of conductive lines connected to the two pairs of differential signal terminals on the transfer circuit board along the transverse direction of the insulating body is greater than the distance between the first contact parts of the two pairs of differential signal terminals .

In a preferred embodiment, the first terminal further includes a ground terminal located between the two pairs of differential signal terminals, and all the first contact portions of the first terminal are arranged in a row along the transverse direction of the insulating body and are aligned with each other. The distance between two adjacent first contact parts is equal, and the transfer circuit board is arranged parallel to the first contact parts and located behind the first contact parts along the insertion direction of the mating connector.

In a preferred embodiment, the front side of the transfer circuit board is provided with a conductive piece connecting the first contact portion and the conductive circuit, and the rear side is provided with a through hole correspondingly connected to the rear end of the conductive circuit to connect the top of the soldering part.

In a preferred embodiment, the conductive circuit includes a first part extending obliquely outward from the rear side of the conductive sheet, a second part extending from the rear end of the first part along the insertion direction of the docking connector, and extending obliquely from the rear end of the second part. to connect the third portion of each weld.

In a preferred embodiment, the second portions of the two pairs of conductive lines corresponding to the first contact portions of the two pairs of differential signal terminals are respectively located outside the first contact portions along the lateral direction of the insulating body.

In a preferred embodiment, the first contact portion is provided with a flat first mating portion located at the front end and extending into the insertion port to connect with the mating connector, and a first connecting portion located at the rear end and extending in a curved shape. to abut against the adapter circuit board.

In a preferred embodiment, the first welding parts are arranged in a row along the lateral direction of the insulating body, and the distance between the first welding parts of the two pairs of differential signal terminals is greater than that of the two corresponding first welding parts. For the distance between the first contact parts, each first welding part is provided with a lead part fixed upwardly in the through hole along the up and down direction of the insulating body, a middle part extending vertically downward from the lead part, and a middle part extending vertically from the middle part. The lower end extends downward to connect with a solder pin on a mother circuit board.

In a preferred embodiment, the widths of all the middle parts of the first soldering part along the transverse direction of the insulating body are respectively larger than the widths of all the first contact parts, conducting parts and welding legs along the transverse direction of the insulating body, and the grounding The width of the middle part of the terminal along the transverse direction of the insulating body is greater than the width of the middle part of the differential signal terminal along the transverse direction of the insulating body.

In a preferred embodiment, the distance between two adjacent conducting portions and the two adjacent solder legs is larger than the distance between two adjacent first contact portions.

In a preferred embodiment, the electrical connector is a USB 3.0B socket connector, the first terminal is used to transmit USB 3.0 signals, and the conductive terminals also include four sockets located on the lower side of the first terminal to transmit USB 2. The second terminal of the 0 signal, the insulating body includes a base and a first tongue plate and a second tongue plate extending forward from the base into the insertion port, and the first tongue plate is provided with a number for receiving the first contact The first terminal receiving groove of the base is provided with a receiving cavity recessed from the rear surface of the base forward to accommodate the transfer circuit board and a number of first terminal receiving grooves and the receiving cavity communicating with the receiving cavity to hold the first contact part. A terminal receiving hole, the second tongue plate is provided with a plurality of second terminal receiving grooves for receiving the second terminals.

Compared with the prior art, the present invention has the following beneficial effects: the electrical connector of the present invention is connected by setting a transfer circuit board between the contact part and the welding part, and the transfer circuit board is respectively connected to two pairs of differential signal terminals The distance between the connected conductive lines is set to be greater than the distance between the contact parts of the two pairs of differential signal terminals, so that the interference generated during the transmission of two adjacent pairs of differential signals can be effectively reduced, and the high performance of the electrical connector of the present invention can be ensured. Frequency signal transmission performance.

【Description of drawings】

FIG. 1 is a three-dimensional assembled view of the electrical connector of the present invention.

FIG. 2 is a schematic diagram of another angle of FIG. 1 .

FIG. 3 is a partially exploded view of the electrical connector of the present invention after the shielding case is disassembled.

FIG. 4 is a schematic diagram of another angle of FIG. 3 .

FIG. 5 is a further exploded view of FIG. 4 .

FIG. 6 is an exploded perspective view of the electrical connector of the present invention.

FIG. 7 is a schematic diagram of another angle of FIG. 6 .

FIG. 8 is a three-dimensional exploded view of the first terminal, the switching circuit board and the insulating block in FIG. 6 .

FIG. 9 is a top view of the adapter circuit board in FIG. 8 .

【Detailed ways】

Please refer to Figures 1 to 9, the electrical connector 100 of the present invention is a USB 3.0B type socket connection that is welded on a mother circuit board (not shown) to be plugged into a mating connector (not shown) device. The docking connector may be a standard USB 3.0B plug connector (not shown), or a standard USB 2.0B plug connector (not shown). The electrical connector 100 includes an insulating body 1 , conductive terminals 2 fixed on the insulating body 1 , an adapter circuit board 8 connected to the conductive terminals 2 , and a shielding case 4 covering the periphery of the insulating body 1 .

5 to 7, the insulating body 1 is provided with a base 11, two side walls 110 extending forward from the left and right sides of the base 11, a bottom wall 111 extending forward from the lower end of the base 11, and a bottom wall 111 extending forward from the bottom of the base 11. A first tongue plate 112 and a second tongue plate 113 extend forward respectively at the upper and lower positions of the front end of the base portion 11 . A forward-opening socket 114 is formed between the two sidewalls 110 and the bottom wall 111 for accommodating a mating connector. The socket 114 includes a narrower first socket 1141 on the upper side and a second socket 1142 located on the lower side of the first socket 1141 and wider than the first socket 1141 along the lateral direction of the insulating body 1. The first plug port 1141 communicates with the second plug port 1142 along the up and down direction of the insulating body 1 . The first tongue 112 extends forward into the first insertion port 1141 , and the second tongue 113 extends forward into the second insertion port 1142 . The first tongue plate 112 and the second tongue plate 113 are parallel to each other, and the second tongue plate 113 is thicker than the first tongue plate 112 along the vertical direction of the insulating body 1 . The lower surface of the first tongue plate 112 is recessed with five first terminal receiving grooves 1121 extending along the front-back direction. The first terminal receiving groove 1121 does not penetrate through the front end surface of the first tongue plate 112 to limit and position the conductive terminal 2 . A pair of second terminal accommodating grooves 1131 are respectively recessed on the upper and lower surfaces of the second tongue plate 113 and extend to the rear end of the insulating body 1 along the front-back direction.

The base 11 is provided with a receiving cavity 115 recessed from the upper side of the rear end to accommodate the transfer circuit board 8, and five terminal receiving holes 116 communicating with the first terminal receiving groove 1121 and the receiving cavity 115 along the front and rear direction of the insulating body 1. . The base 11 is provided with a pair of ribs 1151 extending downward from the top wall of the receiving cavity 115 into the receiving cavity 115 to press the transfer circuit board 8 to prevent the transfer circuit board 8 from moving up and down the insulating body 1 . A holding groove 117 corresponding to the second terminal receiving groove 1131 along the up-down direction of the insulating body 1 is provided on the lower side of the rear end of the base 11 to accommodate and hold the rear end of the conductive terminal 2 . The two side walls 110 are respectively provided with a locking block 1101 extending outward, and a recessed portion 1102 located behind the locking block 1101 and recessed inward. The base 11 is further provided with grooves 118 recessed forward from both sides of the rear surface. The grooves 118 are located at the rear side of the recessed portion 1102 and penetrate through the recessed portion 1102 along the front-to-rear direction of the insulating body 1 .

Referring to FIG. 5 to FIG. 9 , the conductive terminal 2 includes a first terminal 21 on the upper layer and a second terminal 22 on the lower layer. The first terminal 21 is a USB 3.0 terminal for electrically connecting with a standard USB 3.0B plug connector to transmit USB 3.0 signals, so that the first terminal 21 includes two pairs of differential signal terminals 23 and two pairs of differential signal terminals 23. A ground terminal 24 between the signal terminals 23 . The second terminal 22 is a USB2.0 terminal for electrically connecting with a standard USB 2.0B plug connector to transmit USB 2.0 signals, so that the second terminal 22 includes a power terminal, a pair of differential signals terminal and a grounding terminal, and are respectively located on the upper and lower sides of the second tongue plate 113 .

Each first terminal 21 includes a first contact portion 211 extending into the first insertion port 1141 and a first welding portion 212 located behind the first contact portion 211 along the front and back direction of the insulating body 1 (ie, the insertion direction of the docking connector). . The first contact portions 211 are arranged in a row along the lateral direction of the insulating housing 1 and are located on the same horizontal plane. The first welding portions 212 are also arranged in a row along the lateral direction of the insulating body 1 and are located on the same vertical plane. It can be seen that each first terminal 21 is divided into two parts extending horizontally and vertically respectively, and each part is designed in a sheet shape without excessive bending design, so that it is used to manufacture the first terminal 21 The mold (not shown) is relatively simple, which not only saves cost but is also convenient to manufacture, and the material used to stamp the first terminal 21 can be used effectively without generating too much waste. The first contact portions 211 have the same width along the lateral direction of the insulating body 1 and the distance between two adjacent first contact portions 211 is equal.

The transfer circuit board 8 is connected between the first contact portion 211 and the first soldering portion 212 . The transfer circuit board 8 is arranged parallel to the first contact portion 211 and is located behind the first contact portion 211 along the insertion direction of the mating connector. The adapter circuit board 8 is provided with a plurality of conductive strips 81 for connecting with the first contact portion 211, conductive lines 82 connected to the back side of the conductive strips 81, and corresponding to each conductive line 82 and along the insulating body. 1 through the through hole 83 of the adapter circuit board 8 in the up and down direction. The conductive sheet 81 is located at the front end of the transfer circuit board 8, the through hole 83 is located at the rear end of the transfer circuit board 8 to connect and fix the first soldering portion 212, and the conductive circuit 82 is electrically connected to the conductive circuit board 8. between the sheet 81 and the through hole 83 .

Each first contact portion 211 is provided with a first fixing portion 2110 fixed in the terminal receiving hole 116 , and a flat first abutting portion 2111 extending forward from the front end of the first fixing portion 2110 into the first terminal receiving groove 1121 . And the first connecting portion 2112 is bent and extended downward from the rear end of the first fixing portion 2110 to connect with the conductive sheet 81 . The first connecting portion 2112 extends in a curved shape to guide the interposer circuit board 8 to be inserted into the receiving cavity 115 from back to front, and abuts against the conductive sheet 81 along the up-down direction of the insulating body 1 .

Each first welding portion 212 is provided with a lead portion 2121 welded upwardly in the through hole 83 along the up-down direction of the insulating body 1, a middle portion 2122 vertically extending downward from the lead portion 2121, and a downward direction from the lower end of the middle portion 2122. Solder pins 2123 extending to connect with the mother circuit board. The widths of all the middle portions 2122 of the first terminal 21 along the transverse direction of the insulating body 1 are respectively larger than the widths of the first contact portion 211 , the conducting portion 2121 and the soldering leg 2123 along the transverse direction of the insulating body 1 . The distance between two adjacent conducting parts 2121 and two adjacent welding legs 2123 along the transverse direction of the insulating body 1 is greater than the distance between two adjacent first contact parts 211 and adjacent two intermediate parts 2122 along the transverse direction of the insulating body 1 . The distance between them can be widened so that the distance between two adjacent first terminals 21 can be widened to prevent mutual collision during installation or molding, and it can be conveniently welded on the adapter circuit board 8 and the mother circuit board without difficulty. A solder connection that is used to solder causes a short circuit. In this embodiment, the distance between two adjacent connecting parts 2121 along the transverse direction of the insulating body 1 is the same as the distance between two adjacent welding legs 2123 along the transverse direction of the insulating body 1. The leading part of the ground terminal 24 2121 and the distance between the lead portion 2121 of the differential signal terminal 23 adjacent to the ground terminal 24 is greater than the distance between the lead portions 2121 of each pair of differential signal terminals 23, and the middle portion 2122 of the ground terminal 24 The width along the transverse direction of the insulating body 1 is greater than the width of the middle portion 2122 of the differential signal terminal 23 along the transverse direction of the insulating body 1, so that the two pairs of first welding portions 212 of the two pairs of differential signal terminals 23 are along the insulating body 1. The distance between the lateral direction is greater than the distance between the two pairs of first contact portions 211 corresponding to the two pairs of first soldering portions 212, thereby reducing the crosstalk between the two pairs of differential signal terminals 23; and the ground terminal The middle part 2122 of 24 is wider than the middle part 2122 of the differential signal terminal 23 along the transverse direction of the insulating body 1, which can adjust the impedance change caused by widening the distance between the first welding parts 212 of the two pairs of differential signal terminals 23 , the crosstalk between two adjacent pairs of differential signal terminals 23 can be further reduced.

The electrical connector 100 also includes an insulating block 5 that is injection molded around the first welding portion 212 to prevent two adjacent first welding portions 212 from contacting each other and causing a short circuit when assembled, and to make the first welding portion 212 Mounted as a unit, making assembly easy. A pair of protrusions 52 are respectively extended outward on both sides of the insulating block 5 , and the protrusions 52 respectively abut against the upper and lower inner walls of the groove 118 to prevent the insulating block 5 from moving up and down.

The conductive lines 82 include two pairs of first conductive lines 821 located on both sides correspondingly connected to the two pairs of differential signal terminals 23 , and a second conductive line 822 located in the middle to be connected to the ground terminals 24 . The conductive sheet 81 is disposed corresponding to the first contact portion 211 along the front and back directions of the insulating housing 1 . The first conductive line 821 is provided with a first part 8211 obliquely extending outward from the rear side of the conductive sheet 81, a second part 8212 extending from the rear end of the first part 8211 along the insertion direction of the mating connector, and a second part 8212 extending from the back of the second part 8212. The end extends obliquely to be electrically connected to the third portion 8213 of the first soldering portion 212 . The length of the second portion 8212 extending along the front-back direction of the insulating body 1 is greater than the lengths of the first portion 8211 and the third portion 8213 extending along the front-back direction of the insulating body 1 . The second conductive circuit 822 extends linearly along the insertion direction of the mating connector to electrically connect the first contact portion 211 and the first welding portion 212 of the ground terminal 24 .

The distance between each pair of first conductive lines 821 corresponding to each pair of differential signal terminals 23 on the transfer circuit board 8 is smaller than the distance between a first conductive line 821 adjacent to a second conductive line 822 and a first conductive line 821 adjacent to a second conductive line 822 . The distance between the two conductive lines 822 . And the two pairs of second parts 8212 corresponding to the two pairs of differential signal terminals 23 are respectively located on both sides of all the first contact parts 211 along the lateral direction of the insulating body 1, so that the two pairs of second parts 8212 are located between the two pairs of the second part 8212 along the lateral direction of the insulating body 1. The distance between the two pairs of differential signal terminals 23 is greater than the distance between the first contact portions 211 of the two pairs of differential signal terminals 23, thereby greatly widening the distance between the two pairs of first conductive lines 821 for transmitting differential signals, and reducing the distance between the two pairs of differential signal terminals 23. crosstalk phenomenon during signal transmission; in addition, by setting the transfer circuit board 8 to widen the distance between the two pairs of differential signal transmission paths, it is convenient to adjust and control the impedance change caused by widening the distance between the two pairs of differential signals , making the signal transmission stable.

In the present invention, the conductive sheet 81 and the conductive circuit 82 are all arranged on the same side of the transfer circuit board 8. Of course, in other embodiments, the conductive sheet 81 and the conductive circuit 82 can also be respectively arranged on the same side of the transfer circuit board 8. sides. When assembling, first install the first contact portion 211 of the first terminal 21 on the first tongue plate 112 from back to front, at this time, the fixing portion 2110 is fixed in the terminal receiving hole 116, and the first connecting portion 2112 is accommodated in the accommodation cavity 115; then, the adapter circuit board 8 fixed with the first soldering portion 212 is installed into the accommodation cavity 115 from the rear to the front, and at this time, the first connecting portion 2112 presses downward against the On the conductive sheet 81 , the protruding rib 1151 also presses down the adapter circuit board 8 to fix the adapter circuit board 8 on the insulating body 1 .

The second terminal 22 is provided with a second holding portion 222 held in the second terminal receiving groove 1131 on the base 11 , and a second contact extending forward from the front end of the second holding portion 222 into the second socket 1142 . part 221 , and a second welding part 223 vertically extending downward from the rear end of the second holding part 222 . The second contact portions 221 are respectively cantilevered in two rows and accommodated in the second terminal receiving grooves 1131 on the upper and lower surfaces of the second tongue plate 113 to electrically connect with the USB 2.0B plug connector. The second welding portions 223 are arranged in two rows along the front and back direction of the insulating body 1 , and are accommodated in the holding groove 117 at the rear side of the base 11 to prevent left and right shaking. A pair of protrusions 51 protruding forward are provided on the lower side of the front end of the insulating block 5. The protrusions 51 press against the rear end of the second welding portion 223 and are received in the holding groove 117 forward, so that The second welding portion 223 is prevented from moving backward. When the USB 2.0B plug connector is inserted into the socket 114, the USB 2.0B plug connector is only accommodated in the second socket 1142, and is only electrically connected to the second contact portion 221 to transmit USB 2.0 signals and when the USB 3.0B type plug connector is inserted into the socket 114, the USB 3.0B type plug connector fills up the first and second sockets 1141, 1142, and simultaneously contacts the first and second contact portions 211 , 221 are electrically connected to transmit USB 3.0 signals.

The shielding shell 4 includes a first shell 41 and a second shell 42 interlocked along the front and rear directions. The first housing 41 includes a top wall 411 covering the top of the insulating body 1, two side walls 412 bent downward from both sides of the top wall 411 to cover both sides of the insulating body 1, and a front end of the top wall 411 facing toward the The butt wall 413 formed by bending down. The docking wall 413 defines an opening 4131 corresponding to the socket 114 for the docking connector to pass through. Both sides of the abutting wall 413 are respectively bent backwards to engage with the two side walls 412 to prevent the abutting wall 413 from tilting forward. The two sidewalls 412 are respectively provided with a pair of fastening holes 4121 for fastening with the fastening blocks 1101 on the insulating body 1 and behind the fastening holes 4121 for fastening with the second housing 42 The elongated keyhole 4122. The two sidewalls 412 are respectively provided with a resisting elastic piece 4123 that is bent inward from the front end and then extended backward, and a holding foot 4124 that extends downward from the lower end to hold the mother circuit board and is bent inward from the lower end. The buckling piece 4125 extends to buckle with the bottom wall 111 of the insulating housing 1 . The pressing elastic piece 4123 extends backward into the insertion port 114 and is located on the left and right sides of the second tongue plate 113 to press against both sides of the docking connector, so that the docking connector is not easy to fall off when plugged in and used. The second housing 42 has a rear wall 421 covering the rear side of the insulating body 1 , side edges 422 extending forward from both sides of the rear wall 421 , and a top edge 423 extending forward from the top of the rear wall 421 . The two side edges 422 are respectively provided with a locking portion 4221 extending inwardly and then forwardly. The locking portion 4221 includes a flat portion 4222 accommodated in the concave portion 1101 and locking pieces 4223 respectively extending outward from upper and lower sides of the flat portion 4222 . The locking piece 4223 is locked in the locking hole 4122 to lock the first and second shells 41 and 42 together.

From the above, it can be concluded that the electrical connector 100 of the present invention is connected by providing an adapter circuit board 8 between the first contact portion 211 and the first welding portion 212 of the first terminal 21, and the adapter circuit board 8 is connected to the The distance between the two pairs of first conductive lines 8211 connected to the two pairs of differential signal terminals 23 is set to be greater than the distance between the first contact portions 211 of the two pairs of differential signal terminals 23, so that the distance between two adjacent pairs of conductive lines 8211 is effectively reduced on the horizontal plane. interference during differential signal transmission; in addition, the distance between the first welding portions 212 of the two pairs of differential signal terminals 23 along the lateral direction of the insulating housing 1 is greater than that between the first contact portions 211 of the two pairs of differential signal terminals 23 The distance between the two pairs of differential signal terminals 23 is widened, and the interference phenomenon in the transmission process of the two pairs of differential signals is further reduced on the vertical plane, thereby improving the high frequency performance of the electrical connector 100 of the present invention to a greater extent .

In summary, the above are only preferred embodiments of the present invention, and should not limit the scope of the present invention, that is, all simple equivalent changes and modifications made according to the claims of the present invention and the contents of the description of the invention are all Should still belong to the scope covered by the patent of the present invention.

Claims (10)

1. An electrical connector, comprising an insulating body, a plurality of conductive terminals held in the insulating body and a switching circuit board, the insulating body is provided with a plug-in port for accommodating a docking connector, and the conductive terminals include at least The first terminal of the two pairs of differential signal terminals, the first terminal is provided with a first contact portion extending forward into the socket and a first welding portion located behind the first contact portion along the insertion direction of the butt connector, so The transfer circuit board is connected between the first contact part and the first welding part, and the transfer circuit board is provided with conductive lines electrically connected to the first contact part and the first welding part respectively. The distance between the two pairs of conductive lines connected to the two pairs of differential signal terminals on the circuit board along the transverse direction of the insulating body is greater than the distance between the first contact parts of the two pairs of differential signal terminals, and the feature is that the turning The connecting circuit board is arranged in parallel with the first contact part and is located behind the first contact part along the insertion direction of the docking connector. The front side of the transfer circuit board is provided with a conductive sheet connecting the first contact part and the conductive circuit. The first contact part There is a first connecting portion located at the rear end and extending in a curved shape for abutting against the conductive sheet. 2. The electrical connector according to claim 1, wherein the first terminal further comprises a ground terminal located between the two pairs of differential signal terminals, and all first contact portions of the first terminal are along the The insulating body is arranged in a row in the lateral direction, and the distance between two adjacent first contact parts is equal. 3 . The electrical connector as claimed in claim 2 , wherein a through hole correspondingly connected to the rear end of the conductive circuit to connect to the top of the soldering portion is formed on the rear side of the switching circuit board. 4 . 4. The electrical connector according to claim 1, wherein the conductive circuit includes a first part extending obliquely outward from the rear side of the conductive sheet, and a second part extending from the rear end of the first part along the insertion direction of the mating connector. part and a third part extending obliquely from the rear end of the second part to connect each welding part, and the second parts of the two pairs of conductive lines corresponding to the first contact parts of the two pairs of differential signal terminals are respectively located along the lateral direction of the insulating body outside of the first contact portion. 5. The electrical connector according to claim 1, wherein the insulating body comprises a base and a first tongue and a second tongue extending forward from the base into the socket, the first tongue There are several first terminal accommodating grooves for accommodating the first contact parts on the top, and the insulative body is provided with a receiving cavity recessed forward from its rear surface to accommodate the transfer circuit board, extending downward from the top wall of the accommodating cavity A pair of protruding ribs that are inserted into the receiving cavity to press the transfer circuit board and a plurality of first terminal receiving holes that communicate with the receiving cavity and the first terminal receiving groove to hold the first contact portion. 6 . The electrical connector according to claim 1 , wherein the first contact portion is further provided with a flat first mating portion located at the front end and extending into the insertion opening for connecting with the mating connector. 6 . 7. The electrical connector according to claim 3, wherein the first welding portions are arranged in a row along the lateral direction of the insulating body, and the distance between the first welding portions of the two pairs of differential signal terminals is greater than The distance between the two pairs of first contact parts corresponding to the first welding part, each first welding part is provided with a guide part fixed in the through hole along the up and down direction of the insulating body, from the guide part down The vertically extending middle part and the welding feet extending downward from the lower end of the middle part to connect with a mother circuit board. 8. The electrical connector according to claim 7, wherein the widths of all the middle parts of the first welding part along the transverse direction of the insulating body are respectively larger than the widths of all the first contact parts, conducting parts and welding legs along the insulating body. The width in the transverse direction of the body, and the width of the middle part of the ground terminal along the transverse direction of the insulating body is greater than the width of the middle part of the differential signal terminal along the transverse direction of the insulating body. 9 . The electrical connector as claimed in claim 7 , wherein the distance between two adjacent conducting portions and the two adjacent solder legs is greater than the distance between two adjacent first contact portions. 10 . 10. The electrical connector according to claim 5, wherein the electrical connector is a USB3.0B socket connector, the first terminal is used to transmit USB3.0 signals, and the conductive terminal further includes Four second terminals are located on the lower side of the first terminals for transmitting USB2.0 signals, and the second tongue plate is provided with a plurality of second terminal receiving slots for receiving the second terminals.

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