CN112448235B

CN112448235B - Electric connector and circuit board thereof

Info

Publication number: CN112448235B
Application number: CN201910831023.XA
Authority: CN
Inventors: 杨云芳
Original assignee: Molex Interconnect Shanghai Co Ltd; Molex LLC
Current assignee: Molex Interconnect Shanghai Co Ltd; Molex LLC
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2022-05-31
Anticipated expiration: 2039-09-04
Also published as: TWM596987U; CN112448235A

Abstract

The invention provides an electric connector and a circuit board thereof. The electric connector comprises an insulating body, a plurality of first conductive terminals, a plurality of second conductive terminals and a shell; each conductive terminal comprises a contact part exposed on the tongue plate of the insulating body and a welding leg extending out of the insulating body; the first conductive terminal at least comprises two power terminals, two grounding terminals and three pairs of differential signal terminals; the solder tails of the three pairs of differential signal terminals are arranged in a first row along a transverse direction; a first space is formed between the two contact parts of each pair of differential signal terminals, a second space is formed between the two welding feet of each pair of differential signal terminals, and the second space is larger than the first space; the two grounding terminals and the welding feet of the two power terminals are transversely arranged into a second row; the solder tails of the second conductive terminals are arranged in a third row; the first row, the second row and the third row are sequentially arranged along the front-back direction. The invention can improve signal crosstalk and facilitate soldering to a circuit board.

Description

Electric connector and circuit board thereof

Technical Field

The present invention relates to electrical connectors, and more particularly, to an electrical connector that facilitates improved signal crosstalk and facilitates soldering to a circuit board.

Background

Chinese patent application CN105703157A discloses an electrical connector for mounting on a circuit board, the electrical connector comprising an insulating body and first terminals fixed on the insulating body, each of the first terminals comprising a middle portion fixed on the insulating body, a contact portion extending from the middle portion and a pin extending from the middle portion, the pin comprising a connection portion extending from the middle portion and a soldering portion extending from the connection portion for mounting on the circuit board; the first terminal comprises at least two ground/power terminals and a pair of differential pair terminals between the two ground/power terminals; the contact portions of the first terminals are arranged in a row; the welds of the pair of differential pair terminals are arranged in a first row and the welds of the two ground/power terminals are arranged in a second row, the first and second rows being parallel to each other; the connecting portions of the two ground/power terminals have ghost sections in a row with the connecting portions of the pair of differential pair terminals.

This Type of electrical connector is a USB Type-C connector, which has differential pair terminals for transmitting differential signals at high speed, so how to avoid signal crosstalk is a key problem to be solved in this Type of electrical connector. In addition, since the USB Type-C connector is a micro connector with a small size and the space between the soldering portions of adjacent terminals is small, how to reasonably improve the layout of the soldering portions of the terminals, reduce the difficulty of drilling holes on the circuit board and reduce the risk of tin adhesion during soldering still needs to be further improved based on the prior art.

Disclosure of Invention

The invention aims to solve the technical problem of providing an electric connector which can improve the signal crosstalk problem and is beneficial to being welded to a circuit board.

According to one aspect of the present invention, the present invention provides an electrical connector mountable on a circuit board, the electrical connector including an insulative housing, a plurality of first conductive terminals and a plurality of second conductive terminals fixed to the insulative housing, and a housing disposed around the insulative housing; the insulating body comprises a base and a tongue plate extending forwards from the base, and the shell surrounds the tongue plate and forms a butt joint cavity; each conductive terminal comprises a contact part exposed on the tongue plate and a welding leg extending outwards from the insulating body; the contact parts of the first conductive terminals are exposed on one surface of the tongue plate, and the contact parts of the second conductive terminals are exposed on the other surface of the tongue plate; the plurality of first conductive terminals at least comprise two power supply terminals and two ground terminals which are arranged at intervals, and three pairs of differential signal terminals; the solder tails of the three pairs of differential signal terminals are arranged in a first row along a transverse direction perpendicular to the front-to-back direction; the two contact parts of each pair of differential signal terminals have a first spacing, the two welding feet of each pair of differential signal terminals have a second spacing, and the second spacing is larger than the first spacing; the two ground terminals and the two power terminals have solder tails arranged in a second row along the transverse direction; the solder tails of the second conductive terminals are arranged in a third row along the transverse direction; the first row, the second row and the third row are sequentially arranged along the front-back direction.

The invention also provides an electric connector and a circuit board thereof, wherein the electric connector is based on the electric connector, the electric connector is correspondingly welded to the circuit board, the circuit board is provided with three rows of welding pads corresponding to the welding feet of the first conductive terminals and the second conductive terminals, and two welding pads positioned in the center of the first row and two welding pads positioned in the center of the third row are electrically connected together in a staggered manner.

Compared with the prior art, the invention has at least the following advantages: in the electric connector, the welding feet of the three pairs of differential signal terminals are arranged in the first row, and the terminals in the second row and the second conductive terminals in the third row are separated, so that the differential signal terminals of the first conductive terminals and the differential signal terminals of the second conductive terminals have larger intervals, and the crosstalk between the differential signal terminals is reduced. Meanwhile, the welding feet of the first conductive terminals have larger space, so that the space between two adjacent welding pads which are electrically connected with the first conductive terminals in the circuit board is larger, circuits are more easily arranged in the circuit board, the arrangement of the welding pads is optimized, the punching processing is convenient, the voltage bearing capacity of the circuit board can be improved, the circuit board is prevented from being broken down by high voltage, meanwhile, the short circuit problem caused by the fact that tin paste filled in the welding pads is adhered together in the welding process can be greatly reduced, and the reliability of the circuit board is improved.

Drawings

Fig. 1 is a perspective view of an electrical connector and a circuit board thereof according to a preferred embodiment of the invention.

Fig. 2 is an exploded perspective view of fig. 1.

Fig. 3 is a front view of the electrical connector of fig. 1.

Fig. 4 is a sectional view a-a of fig. 3.

Fig. 5 and 6 are exploded perspective views of the electrical connector of fig. 1 from two different viewing directions.

Fig. 7 is a bottom view of the dielectric body of the electrical connector of fig. 1.

Fig. 8 is an exploded perspective view of fig. 7.

Fig. 9 and 10 are perspective exploded views of fig. 8 in two different viewing directions, further exploded.

Fig. 11 and 12 are two different perspective arrangements of the first conductive terminals of the electrical connector.

Fig. 13 is a circuit schematic of the pad connections of the circuit board of fig. 1.

Wherein the reference numerals are as follows: 100. an electrical connector; 200. a circuit board; 201. mounting holes; 202. a first pad; 203. a second pad;

1. an insulating body; 11. a base; 12. a tongue plate; 14. a first insulator; 15. a second insulator; 16. a third insulator; 18. a metal shielding plate; 181. an extension portion;

2. a first conductive terminal; 21. a contact portion; 22. welding feet; 23. a connecting portion; 231/231a, a first connecting section; 232/232a, a second connecting segment; 233/233a, a third connecting segment; 234. a fourth connection section;

3. A second conductive terminal; 31. a contact portion; 32. welding feet; 33. a connecting portion;

4. a housing; 41. a docking chamber; 42. a fixing leg;

5. a rear shield shell;

6. a seal ring;

7. and (3) waterproof glue.

Detailed Description

While this invention is susceptible of embodiment in different forms, there is shown in the drawings and will herein be described in detail, specific embodiments thereof with the understanding that the present description is to be considered as an exemplification of the principles of the invention and is not intended to limit the invention to that as illustrated.

Thus, a feature indicated in this specification is intended to describe one of the features of an embodiment of the invention and does not imply that every embodiment of the invention must have the described feature. Further, it should be noted that this specification describes many features. Although some features may be combined to show a possible system design, these features may also be used in other combinations not explicitly described. Thus, the combinations illustrated are not intended to be limiting unless otherwise specified.

In the embodiments shown in the drawings, directional references (such as upper, lower, left, right, front and rear) are used to explain the structure and movement of the various elements of the invention, rather than absolute, and relative. These descriptions are appropriate when the elements are in the positions shown in the drawings. If the description of the positions of these elements changes, the indication of these directions changes accordingly.

The preferred embodiments of the present invention will be further described in detail with reference to the accompanying drawings.

Referring to fig. 1 and fig. 2, the present preferred embodiment provides an electrical connector 100 and a circuit board 200 thereof, wherein the electrical connector 100 is mounted on the circuit board 200. The electrical connector 100 is preferably a USB-C receptacle connector, which is mounted on the equipment side for receiving another plug connector (not shown) during use.

The circuit board 200 is provided with a plurality of mounting holes 201 for fixing the electrical connector 100. In this embodiment, the circuit board 200 is further provided with a set of first pads 202 in a through-via structure and a set of second pads 203 in a surface-mount manner for forming electrical connections with the electrical connector 100. The plurality of first pads 202 are arranged in two rows, and the plurality of second pads 203 are arranged in one row.

Referring to fig. 3 to 6, the electrical connector 100 includes an insulating body 1, a plurality of first conductive terminals 2 and a plurality of second conductive terminals 3 fixed on the insulating body 1, and a housing 4 covering the periphery of the insulating body 1. Further, a rear shield case 5 is included which is fixed to the rear end of the housing 4. In addition, a sealing ring 6 is sleeved at the front end of the shell 4, and a waterproof glue 7 is coated between the rear end of the insulating body 1 and the shell 4, so that the waterproof effect is improved.

The insulating body 1 includes a base 11 and a tongue plate 12 extending forward from the base 11. The insulating body 1 is preferably combined with the first conductive terminal 2 and the second conductive terminal 3 by an insert molding process. The housing 4 is sleeved on the periphery of the insulating body 1. The front end of the housing 4 surrounds the tongue plate 12, and a mating cavity 41 is formed between the front end of the housing and the tongue plate 12 for mating with another plug connector. The housing 4 is preferably injection molded from metal powder. A pair of fixing legs 42 protrude from both sides of the housing 4 for mounting to the circuit board 200. The rear shielding shell 5 is fixed to the rear end of the housing 4, shields the rear end of the insulating body 1, and plays a role in shielding electromagnetic interference.

As shown in fig. 4, each first conductive terminal 2 includes a contact portion 21 exposed on the lower surface of the tongue plate 12, a solder leg 22 extending outward from the insulating body 1, and a connecting portion 23 connected between the contact portion 21 and the solder leg 22. In the preferred embodiment, the solder tail 22 is a straight-insertion structure. The solder tails 22 of the plurality of first conductive terminals 2 are arranged in a first row P1 and a second row P2 spaced back and forth, and the first row P1 is spaced forward of the second row P2.

Referring to fig. 7 to 12, the contact portions 21 of the plurality of first conductive terminals 2 are arranged in parallel along the transverse direction on the lower surface of the tongue plate 12. The first conductive terminals 2 are arranged according to the USB Type-C terminals, and the number of the first conductive terminals is twelve, and the first conductive terminals include two pairs of high-speed differential signal terminals, a pair of low-speed differential signal terminals, two pairs of power/ground terminals, an auxiliary Signal (SBU) terminal and a direction detection (CC) terminal.

According to the view direction of fig. 7, the following are arranged in sequence from right to left: a ground terminal B1, a pair of high-speed differential signal transmission terminals B2 and B3, a power terminal B4, a direction detection terminal B5, a pair of low-speed differential signal terminals B6 and B7, an auxiliary signal terminal B8, a power terminal B9, a pair of high-speed differential signal reception terminals B10 and B11, and a ground terminal B12.

The high-speed differential signal transmitting terminals B2 and B3, the low-speed differential signal terminals B6 and B7, and the high-speed differential signal receiving terminals B10 and B11 are all used for transmitting signals, and the solder tails 22 of the six first conductive terminals 2 are arranged in a first row P1 along a transverse direction perpendicular to the front-back direction. The six solder fillets 22 of the first conductive terminal 2, i.e., the two ground terminals B1 and B12, the two power terminals B4 and B9, the auxiliary signal terminal B8, and the direction detection terminal B5, are arranged in a second row P2 in the transverse direction.

Referring to fig. 7, the contact portions 21 of the two high-speed differential signaling terminals B2 and B3 are substantially parallel, and the two contact portions 21 have a first distance D1 therebetween. The solder fillets 22 of the two high-speed differential signaling terminals B2, B3 are also substantially parallel, and the two solder fillets 22 have a second pitch D2 therebetween. The second distance D2 is preferably greater than the first distance D1, so that the first pads 202 penetrating through the circuit board 200 are conveniently formed to correspondingly receive the solder tails 22, and the circuit board 200 is not easily cracked due to the small distance between the first pads 202.

With reference to fig. 11 and 12, in the present embodiment, the pitch of the first conductive terminals 2 is changed by the bending shape of the connection portion 23.

The connecting portion 23 of the two high-speed differential signaling terminals B2 and B3 has a first connecting section 231 extending outwardly and biased with respect to the contact portion 21, a second connecting section 232 extending rearwardly from the first connecting section 231, a third connecting section 233 extending downwardly and biased with respect to the second connecting section 232, and a fourth connecting section 234 extending downwardly and biased with respect to the third connecting section 233. The first connection section 231, the second connection section 232 and the contact portion 21 are located on the same plane, and the second connection section 232 is parallel to the contact portion 21. The solder 22 extends downward from the lower end of the fourth connecting section 234, and the solder 22 is parallel to the third connecting section 233.

The first connection section 231, the second connection section 232 and the third connection section 233 of the two high-speed differential signaling terminals B2 and B3 are all substantially parallel, but the fourth connection section 234 is folded back, so that the solder feet 22 of the two high-speed differential signaling terminals B2 and B3 have a second distance D2 therebetween, and the second distance D2 is greater than the first distance D1 between the two contact portions 21.

The two high-speed differential signal receiving terminals B10, B11 are provided symmetrically to the two high-speed differential signal transmitting terminals B2, B3. The fourth connecting section (not numbered) is also oppositely biased, so that the solder tails 22 of the two high-speed differential signal receiving terminals B10 and B11 have a larger second spacing D2.

The first connecting sections 231 of the high-speed differential signal transmitting terminals B2 and B3 and the first connecting sections 231 of the high-speed differential signal receiving terminals B10 and B11 are deflected back to back in the front-to-back direction, so as to increase the distance between the solder tails 22 of the two pairs of differential signal terminals B2 and B3 and B10 and B11, and also increase the distance between the solder tails 22 of the two pairs of differential signal terminals B2 and B3 and B10 and B11 and the solder tails 22 of the low-speed differential signal terminals B6 and B7, thereby being beneficial to reducing crosstalk.

The connecting portion 23a of the two low-speed differential signal terminals B6 and B7 has a first connecting section 231a, a second connecting section 232a extending backward from the first connecting section 231a, and a third connecting section 233a extending downward from the second connecting section 232 a. The first connecting sections 231a of the two low-speed differential signal terminals B6 and B7 are deflected outward away from each other in the front-to-rear direction, the second connecting sections 232a and the third connecting sections 233a of the two low-speed differential signal terminals B6 and B7 are parallel, and the solder tails 22 of the two low-speed differential signal terminals B6 and B7 extend downward from the third connecting sections 233 a. The first connecting section 231a, which is oppositely biased, allows the solder tails 22 of the two low-speed differential signal terminals B6 and B7 to have a relatively larger second spacing D2 therebetween.

The extending direction of the first connecting section 231a of each low-speed differential signal terminal B6/B7 is the same as the extending direction of the first connecting section 231 of the adjacent high-speed differential signal transmitting terminal/high-speed differential signal receiving terminal B2/B3/B10/B11, but the extending length of the first connecting section 231a of the low-speed differential signal terminal B6/B7 is smaller than the extending length of the first connecting section 231 of the high-speed differential signal transmitting/receiving terminal B2/B3/B10/B11, so that a larger solder foot spacing exists between the low-speed differential signal terminal B6/B7 and the high-speed differential signal transmitting/receiving terminal B2/B3/B10/B11.

As shown in fig. 7, a third distance D3 is provided between the solder tail 22 of the low-speed differential signal terminal B6 and the solder tail 22 of the high-speed differential signal transmission terminal B3, a third distance D3 is also provided between the solder tail 22 of the low-speed differential signal terminal B7 and the solder tail 22 of the high-speed differential signal reception terminal B10, and the third distance D3 is greater than the second distance D2. The third distance D3 is set to have a larger interval between two adjacent pairs of differential signal terminals, so as to reduce crosstalk between two adjacent pairs of differential signal terminals.

When viewed from the front-rear direction, the fillet 22 of the auxiliary signal terminal B8 and the fillet 22 of the power terminal B9 are projected into the third distance D3 between the low-speed differential signal terminal B7 and the high-speed differential signal receiving terminal B10. The pad 22 of the direction detection terminal B5 and the pad 22 of the power supply terminal B4 are projected into the third distance D3 between the low-speed differential signal terminal B6 and the high-speed differential signal transmission terminal B3. That is, when viewed in the front-back direction and the transverse direction, the differential signal terminals B6/B7/B10/B11, the auxiliary signal terminals B8, the direction detection terminals B5 and the power supply terminals B4/B9 are arranged in a staggered manner, so that a larger interval is provided, and the phenomenon that soldering tin of the terminals is adhered when the terminals are soldered to the circuit board 200, and the product is poor is avoided.

The two high-speed differential signal transmitting terminals B2 and B3 and the power supply terminal B4 and the ground terminal B1 of the second row are arranged in an isosceles trapezoid, the two high-speed differential signal transmitting terminals B2 and B3 form the top of the isosceles trapezoid, and the power supply terminal B4 and the ground terminal B1 form the bottom of the isosceles trapezoid.

The two low-speed differential signal terminals B6, B7 and the direction detection terminal B5 and the auxiliary signal terminal B8 in the second row are arranged in an isosceles trapezoid, the two low-speed differential signal terminals B6, B7 form the top of the isosceles trapezoid, and the direction detection terminal B5 and the auxiliary signal terminal B8 form the bottom of the isosceles trapezoid.

The two high-speed differential signal receiving terminals B10 and B11 and the power supply terminal B9 and the ground terminal B12 in the second row are arranged in an isosceles trapezoid, the two high-speed differential signal receiving terminals B10 and B11 form the top of the isosceles trapezoid, and the power supply terminal B9 and the ground terminal B12 form the bottom of the isosceles trapezoid. By the staggered arrangement of the isosceles trapezoids, the adhesion of the soldering tin of the terminals when the terminals are welded to the circuit board 200 can be avoided.

Referring to fig. 4, each second conductive terminal 3 includes a contact portion 31 exposed on the upper surface of the tongue portion 12, a solder leg 32 extending outward from the insulating body 1, and a connecting portion 33 connected between the contact portion 31 and the solder leg 32. In the preferred embodiment, the solder tail 32 is a surface mount structure. The solder tails 32 of the second plurality of contacts 3 are arranged in a third row P3, the third row P3 being located behind the second row P2.

Referring to fig. 7 and 9, the contact portions 31 of the second conductive terminals 3 are arranged in parallel along the transverse direction, the connecting portions 33 are also arranged in parallel, the solder tails 32 of the second conductive terminals 3 are also arranged in parallel along the transverse direction, and the layout and the pitch of the solder tails 32 are the same as those of the contact portions 31.

The second conductive terminals 3 are also arranged according to USB Type-C, have twelve numbers, and include two pairs of high-speed differential signal terminals, one pair of low-speed differential signal terminals, two pairs of power/ground terminals, an auxiliary signal terminal, and a direction detection terminal. The arrangement of the second conductive terminals 3 and the arrangement sequence of the first conductive terminals 2 are in a central staggered symmetrical form, so that the bidirectional butt joint of 180 degrees can be supported.

Also according to the view direction of fig. 7, the plurality of second conductive terminals 3 are sequentially arranged from left to right as follows: a ground terminal a1, a pair of high-speed differential signal transmission terminals a2 and A3, a power supply terminal a4, a direction detection terminal a5, a pair of low-speed differential signal terminals a6 and a7, an auxiliary signal terminal A8, a power supply terminal a9, a pair of high-speed differential signal reception terminals a10 and a11, and a ground terminal a 12.

The solder tails 32 of the second conductive terminals 3 are arranged in a third row P3, and are spaced apart from the differential signal terminals of the first conductive terminals 2 arranged in the first row P1 by the terminals of the second row P2, so that the differential signal terminals of the first conductive terminals 2 and the differential signal terminals of the second conductive terminals 3 have a larger spacing therebetween, which is beneficial to reducing crosstalk between the differential signal terminals.

Referring to fig. 8 to 10, in a preferred manufacturing process, a first insulator 14 may be integrally formed on the plurality of first conductive terminals 2, so as to fix the relative positions of the plurality of first conductive terminals 2; a second insulator 15 is integrally formed on the plurality of second conductive terminals 3, so as to fix the relative positions between the plurality of second conductive terminals 3; then, a metal shielding plate 18 is disposed between the first insulator 14 and the second insulator 15, and a third insulator 16 is further formed by injection molding after being sequentially stacked, so as to form the insulator 1 combined with the plurality of first conductive terminals 2 and the plurality of second conductive terminals 3. The first insulator 14, the second insulator 15 and the third insulator 16 together constitute the insulator 1, and are divided into the base portion 11 and the tongue plate 12 in the front-rear direction in the overall configuration.

In the preferred embodiment, the metal shielding plate 18 plays a role of shielding, and is used for shielding signal crosstalk between the first conductive terminal 2 and the second conductive terminal 3. Preferably, an extending portion 181 extends from each of two sides of the rear end of the metal shielding plate 18. As shown in fig. 5, the extending portion 181 extends beyond the side of the insulating housing 1, and then bends upward to be welded to the housing 4, so that the insulating housing 1 and the housing 4 are fixed to form an integral structure, thereby improving the overall structural strength of the electrical connector 100. Meanwhile, the metal shielding plate 18 is electrically connected to the metal housing 4 to achieve grounding, thereby improving the signal shielding effect. As shown in fig. 7 and 9, the rear end of the metal shielding plate 18 is also bent downward to form two enhanced shielding portions 182, and the two enhanced shielding portions 182 are blocked between the solder tails 22 of the first conductive terminal 2 and the solder tails 32 of the second conductive terminal 3, so as to reduce crosstalk between high-frequency differential signals.

Referring to fig. 4 and 8, the connection portion 23 of the first conductive terminal 2 and a portion of the connection portion 33 of the second conductive terminal are exposed out of the insulating body 1, and the waterproof adhesive 7 covers the exposed portions of the connection portions 23/33, so that external water droplets can be prevented from flowing backwards into the electronic device from the front of the mating cavity 41 through the micro gap at the joint between the conductive terminal 2/3 and the insulating body 1, thereby achieving a better waterproof effect.

Referring to fig. 1 and 2, when the electrical connector 100 is used, the electrical connector 100 is mounted on the circuit board 200 through the two fixing pins 42 of the housing 4, each first conductive terminal 2 of the electrical connector 100 is electrically connected to a first pad 202 disposed on the circuit board 200, and each second conductive terminal 3 of the electrical connector 100 is electrically connected to a second pad 203 disposed on the circuit board 200.

Referring to fig. 13, the plurality of first pads 202 are arranged in a first row Q1 and a second row Q2 spaced back and forth. The first pads 202 of the first row Q1 are respectively and correspondingly inserted into the solder tails 22 of the first conductive terminals 2 of the first row P1, and the first pads 202 of the second row Q2 are respectively and correspondingly inserted into the solder tails 22 of the first conductive terminals 2 of the second row P2. The second pads 203 are arranged in a third row Q3 along the transverse direction, and are correspondingly used for the bonding and welding of the solder tails 32 of the second conductive terminals 3 in the third row P3.

The circuit board 200 is provided with internal conductive traces to form an electrical connection relationship and support the functions of the first conductive terminals 2 and the second conductive terminals 3, and the electrical connection relationship between the pads is a connection line schematically shown in fig. 13.

Two first pads 202 located in the center of the first row Q1 correspond to the low-speed differential signal terminals B7 and B6 in the first conductive terminal 2, respectively, two second pads 203 located in the center of the third row Q3 correspond to a pair of low-speed differential signal terminals a6 and a7 in the second conductive terminal 3, respectively, the two first pads 202 and the two second pads 203 are electrically connected together in a staggered manner, so that the first conductive terminal B7 is electrically connected with the second conductive terminal a7, and the first conductive terminal B6 is electrically connected with the second conductive terminal a 6. The two first pads 202 and the two second pads 203 are arranged in the first row Q1 and the third row Q3, which have a larger interval, so that the wiring design in the circuit board 200 can be facilitated, and at the same time, the crosstalk of the first conductive terminals B7 and B6 on the high-frequency differential signal terminals in the second conductive terminal 3 is reduced.

The two first pads 202 located at the outermost side in the second row Q2 are ground pads corresponding to the two ground terminals B12 and B1 in the first conductive terminal 2, respectively. The two second pads 203 located at the outermost side in the third row Q3 are ground pads corresponding to the two ground terminals a1 and a12 in the second conductive terminal 3, respectively. Wherein the two first pads 202 connected to the ground terminals B12 and B1 are electrically connected together with the two second pads 203 connected to the ground terminals a1 and a12, respectively.

The two first pads 202 in the second row Q2 corresponding to the two power terminals B9 and B4 in the first conductive terminal 2, respectively, are power pads, the two second pads 203 in the third row Q3 corresponding to the two power terminals a9 and a4 in the second conductive terminal 3, respectively, are also power pads, and the two first pads 202 connected to the power terminals B9 and B4 and the two second pads 203 connected to the power terminals a9 and a4, respectively, are electrically connected together.

According to the above description of the structure of the electrical connector 100, in the electrical connector 100, the solder tails 22 of three pairs of differential signal terminals B2& B3, B6& B7 and B10& B11 are all arranged in the first row P1, and the terminals in the second row P2 are spaced apart from the second conductive terminals 3 in the third row P3, so that the differential signal terminals B2& B3, B6& B7, B10& B11 in the first conductive terminal 2 and the differential signal terminals a2& A3, A6& a7 and a10& a11 in the second conductive terminal 3 have larger spacing, and the crosstalk between the high-frequency differential signal terminals is reduced. Meanwhile, the solder tails 22 of the first conductive terminals 2 have a larger distance therebetween, so that a larger hole distance is formed between two adjacent first pads 202 in the circuit board 200, thereby facilitating the arrangement of circuits in the circuit board 200, optimizing the arrangement of the first pads 202 for facilitating the perforation processing, improving the voltage withstanding capability of the circuit board 200, avoiding the circuit board 200 from being broken down by high voltage, greatly reducing the short circuit problem caused by the adhesion of solder paste filled in the pads 202 during the soldering process, and improving the reliability of the circuit board 200. The invention can also reduce the processing difficulty of the first welding disc 202 in the circuit board 200 and the processing cost, and is particularly suitable for circuit boards with the thickness of more than 1.00mm in automobiles and general industries.

The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the embodiments of the present invention, and those skilled in the art can easily make various changes and modifications according to the main concept and spirit of the present invention, so the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An electric connector can be arranged on a circuit board and comprises an insulating body, a plurality of first conductive terminals and a plurality of second conductive terminals which are fixed on the insulating body, and a shell which is sleeved on the periphery of the insulating body;

the insulating body comprises a base and a tongue plate extending forwards from the base, and the shell surrounds the tongue plate and forms a butt joint cavity;

each conductive terminal comprises a contact part exposed on the tongue plate, a welding leg extending outwards from the insulating body and a connecting part connected between the contact part and the welding leg; the contact parts of the first conductive terminals are exposed on one surface of the tongue plate, and the contact parts of the second conductive terminals are exposed on the other surface of the tongue plate; the plurality of first conductive terminals at least comprise two power supply terminals and two ground terminals which are arranged at intervals, and three pairs of differential signal terminals; the method is characterized in that:

The solder tails of the three pairs of differential signal terminals are arranged in a first row along a transverse direction perpendicular to the front-to-back direction; the two contact parts of each pair of differential signal terminals have a first spacing, the two welding feet of each pair of differential signal terminals have a second spacing, and the second spacing is larger than the first spacing; the two ground terminals and the two power terminals have solder tails arranged in a second row along the transverse direction; the solder tails of the second conductive terminals are arranged in a third row along the transverse direction; the first row, the second row and the third row are sequentially arranged along the front-back direction; a waterproof adhesive is coated between the insulating body and the shell, the connecting part of the first conductive terminal and a part of the connecting part of the second conductive terminal are exposed out of the insulating body, and the waterproof adhesive wraps the connecting part of the first conductive terminal and the connecting part of the second conductive terminal.

2. The electrical connector of claim 1, wherein said plurality of first conductive terminals further includes an auxiliary signal terminal and a direction detection terminal, and wherein said auxiliary signal terminal and said direction detection terminal are arranged with solder tails thereof arranged in said second row.

3. The electrical connector of claim 2, wherein the solder tails of two adjacent pairs of the three pairs of differential signal terminals have a third pitch therebetween, the third pitch being greater than the second pitch.

4. The electrical connector of claim 3, wherein the solder tails of said auxiliary signal terminals and the solder tails of one of said power terminals are projected into one of said third pitches, and the solder tails of said direction detection terminals and the solder tails of the other of said power terminals are projected into the other of said third pitches, as viewed in the front-to-rear direction.

5. The electrical connector of claim 1, wherein two differential signal terminals of each pair of differential signal terminals of the first row and two adjacent terminals of the second row are arranged in an isosceles trapezoid, wherein the two differential signal terminals form a top of the isosceles trapezoid and the two adjacent terminals of the second row form a bottom of the isosceles trapezoid.

6. The electrical connector of any one of claims 1-5, wherein the solder tails of the first plurality of conductive terminals are all in-line and the solder tails of the second plurality of conductive terminals are all surface mount.

7. The electrical connector of any one of claims 1-5, wherein the housing further comprises a metal shielding plate disposed between the first and second conductive terminals, and an extension portion extends from each of two sides of the metal shielding plate and is welded to the housing.

8. The electrical connector of any one of claims 1-5, wherein the solder tails of the second plurality of conductive terminals have the same layout as the contact portions thereof.

9. An electrical connector and a circuit board thereof, wherein the electrical connector is according to any one of claims 1 to 8, the electrical connector is correspondingly soldered to the circuit board, the circuit board is provided with three rows of pads corresponding to the solder tails of the first and second conductive terminals, wherein two pads located at the center of the first row and two pads located at the center of the third row are alternately electrically connected together.

10. The electrical connector and circuit board thereof according to claim 9, wherein the pads in the second row of the circuit board corresponding to the two ground terminals are electrically connected to the two ground pads in the third row respectively, and the pads in the second row of the circuit board corresponding to the two power terminals are electrically connected to the two power pads in the third row respectively.