TWI723536B - Electrical connector - Google Patents

Abstract

The present invention relates to an electrical connector comprising an insulative housing and a plurality of power contact pairs. The insulative housing includes a mounting portion for installing on a printed circuit board, a tongue portion extending forwardly from the mounting portion and a plurality of contact-receiving slots extending along a front-and-back direction. The power contact pairs are received in the relative contact-receiving slots and divided into at least two rows arranged in a height direction, and each power contact pair in each row includes two power contacts, each power contact defines a retaining portion held in the corresponding contact-receiving slot, a plurality of contacting portions extending forwardly from a front end of the retaining portion, a soldering portion extending from a back end of the retaining portion. The soldering portion defines a plurality of soldering legs extending downwards, and the contacting portions of the two power contacts of each power contact pair are arranged alternately in a transverse direction.

Description

Electrical connector

The invention relates to an electrical connector, in particular to an electrical connector capable of effectively improving the heating of conductive terminals.

The power terminals of traditional electrical connectors usually form one or more contact arms from the front end of the metal sheet. When the electrical connector transmits current, the highest temperature position of the power terminals is the contact point area of the contact arm. The contact method of the contact point is only line contact, which limits the current channel. In the case of the limited width of the power terminal, the power terminal is easily heated due to the current resistance, which will cause the temperature of the contact point to be too high.

In view of this, it is indeed necessary to further improve the conventional electrical connector to solve the above-mentioned problems.

The object of the present invention is to provide an electrical connector capable of effectively suppressing heat generation of conductive terminals.

In order to achieve the above objective, the present invention provides an electrical connector, which has:

The insulating body has a mounting portion for mounting on the circuit board, a butting portion extending forward from the aforementioned mounting portion, and a plurality of terminal slots extending in the front-to-back direction; and

A plurality of power terminal pairs are fixed in the corresponding terminal grooves of the aforementioned insulating body and divided into at least two rows arranged along the height direction. Each aforementioned power terminal pair in each row includes two power terminals, and each power terminal includes Corresponding to the holding portion in the terminal slot, a plurality of contact portions extending forward from the front end of the holding portion, and a welding portion extending from the rear end of the holding portion, the welding portion having a plurality of welding feet extending downward;

The contact portions of the two power terminals in each of the aforementioned power terminal pairs are alternately and cyclically arranged in the transverse direction.

As a further improvement of the present invention, the aforementioned power terminal pairs are arranged in pairs along the height direction to form a group, and two power source terminal pairs in each group of power terminal pairs are arranged oppositely and spaced apart along the aforementioned height direction.

As a further improvement of the present invention, the contact portions of the aforementioned power terminal pairs located in the same row are arranged in two rows staggered in the front-to-rear direction.

As a further improvement of the present invention, the contact areas of the contact portions of the aforementioned power terminal pairs located in the same row are on the same horizontal plane when they are mated with the mating component.

As a further improvement of the present invention, the two adjacent contact portions in the same row are staggered in the front-to-rear direction.

As a further improvement of the present invention, the two power terminals in each of the aforementioned power terminal pairs are respectively an outer terminal and an inner terminal, and the holding portions of the two power terminals in each of the aforementioned power terminal pairs are arranged in a row along the aforementioned height direction, And it is installed and fixed in the same first terminal groove from the rear side of the aforementioned installation part forward.

As a further improvement of the present invention, the included angle between the contact arm of the outer terminal and the horizontal plane is greater than the included angle between the contact arm of the inner terminal and the horizontal plane.

As a further improvement of the present invention, in the direction from top to bottom, the lengths of the retaining portions of the four power terminals in each set of power terminals are reduced in order along the front and rear directions.

As a further improvement of the present invention, the top wall of the insulating body is provided with a plurality of first heat dissipation grooves penetrating it along the height direction, and the first heat dissipation groove is communicated with the corresponding first terminal groove inside.

As a further improvement of the present invention, each of the first heat dissipation grooves is a long strip extending in the front-to-rear direction, and is located above the corresponding contact portion to expose the contact portion to the outside.

Compared with the prior art, the electrical connector of the present invention arranges the contact portions of the two power terminals in the power terminal pair in a row along the height direction to form the same row of contact portions, and the plural contact portions of the two power terminals alternate in the transverse direction The cycle setting can effectively increase the current channel, improve the heating of the power terminal, and improve the transmission reliability of the electrical connector.

Please refer to Figures 1 to 9 for the first preferred embodiment of the electrical connector of the present invention. The electrical connector 100 includes an insulating body 1 and a plurality of power terminal pairs 2 fixed to the insulating body 1. For ease of description, the following will take the butt end of the electrical connector 100 as the front end, and the other end opposite to the butt end as the back end. That is, the front-to-rear direction is between the electrical connector 100 and the mating element (not shown). The butt direction, in addition, defines that one direction perpendicular to the aforementioned front-rear direction is the lateral direction, and the other direction perpendicular to the front-rear direction is the height direction. In this embodiment, the dimension of the aforementioned insulating body 1 in the lateral direction is greater than its height. The size in the front and rear directions.

Please refer to Figures 1 to 4 in combination with Figures 8 to 9. In the present invention, the insulating body 1 has a mounting portion 11, a mating portion 12 extending forward from the mounting portion 11, and a plurality of edges The first terminal groove 13 extending in the front-rear direction and the plurality of partitions 14 extending in the front-rear direction are provided with the aforementioned partition 14 between every two adjacent first terminal grooves 13. The first terminal groove 13 penetrates the insulating body 1 in the front-rear direction, and the partition 14 extends forward from the mounting portion 11 to the front end surface 121 of the mating portion 12.

The mating portion 12 has a mating space 120 opened forwardly to accommodate mating components, and the first terminal slot 13 is in communication with the mating space 120.

In this embodiment, the aforementioned insulating body 1 has two upper and lower rows of first terminal grooves 13 and a partition wall 15 formed between the upper row of first terminal grooves 13 and the lower row of first terminal grooves 13. It extends in the aforementioned transverse direction and is formed inside the aforementioned mounting portion 11 and separates the upper and lower rows of first terminal grooves 13. Furthermore, the aforementioned partition wall 15 extends forward to the front end surface of the aforementioned mounting portion 11, and it does not extend forward into the aforementioned mating portion 12.

The rear side of the mounting portion 11 has a first mounting surface 111, a second mounting surface 112, and a third mounting surface 113 spaced apart in the front-to-rear direction, wherein the third mounting surface 113, the second mounting surface 112, and the first mounting surface 111 are arranged in order along the front and back direction.

Please refer to Figures 4 and 9. In this embodiment, the first terminal groove 13 includes a through groove 131 that penetrates the mounting portion 11 in the front-to-rear direction and a plurality of fixing grooves communicating with the through groove 131 132. The fixing grooves 132 are arranged in pairs and symmetrically. In this embodiment, the first terminal groove 13 has two pairs of fixing grooves 132 spaced along the height direction, and the two fixing grooves 132 in each pair are arranged separately On both sides of the through groove 131 in the transverse direction. In the same first terminal groove 13, the extension length of the fixing groove 132 on the upper side in the front-rear direction is greater than the extension length of the fixing groove 132 on the lower side.

Please refer to Figures 5 to 9 where the aforementioned power terminal pair 2 is accommodated in the corresponding first terminal slot 13, and each aforementioned power terminal pair 2 includes two power terminals 21, and each power terminal 21 is provided with There are a holding portion 201 held in the first terminal groove 13, a plurality of contact portions 202 extending forward from one end of the holding portion 201, and a welding portion 203 extending from the other end of the holding portion 201, each of the aforementioned power terminals The contact portions 202 of the two power terminals 21 in the pair 2 are arranged in a row along the height direction, and the plurality of contact portions 202 of the aforementioned two power terminals 21 are alternately arranged in the transverse direction.

The aforementioned power terminal pair 2 is divided into two rows opposite to each other in the height direction, that is, the upper row of power terminal pairs and the lower row of power terminal pairs, and the aforementioned power terminal pairs 2 are arranged in pairs along the height direction to form a group, each group of power terminals The two power terminal pairs 2 in the pair 2 are arranged oppositely and spaced apart along the aforementioned height direction. In the front-rear direction, the welding part 203 of the upper power terminal pair is located behind the second mounting surface 102, and the welding part of the lower power terminal pair is located between the second mounting surface 102 and the third mounting surface 103.

In this embodiment, each power terminal 21 has three contact portions 202 extending forward from its holding portion 201. The holding portion 201 is a sheet-like structure parallel to the horizontal plane, and the contact portion 202 is curved, and There is a contact area 2020 protruding toward the aforementioned partition wall 15.

The contact portions 202 of the aforementioned power terminal pair 2 located in the same row are arranged in two rows staggered in the front-to-rear direction. At the same time, the contact areas 2020 of the contact portions 202 of the aforementioned power terminal pairs 2 located in the same row are on the same horizontal plane. Further, two adjacent contact portions 202 located in the same row are staggered in the front-to-rear direction. In this way, when the docking element is inserted, the contact portions 202 arranged in two rows staggered in the front and rear direction can respectively contact the docking element successively to achieve multi-level and multi-contact point contact, making the contact more sufficient and enhancing its electrical connection. The stability and the stability of current transmission, in addition, make the insertion and extraction force distribution with the mating components uniform and reduce the heat generation of the contact surface.

The two power terminals 21 in each power terminal pair 2 are the outer terminal 211 and the inner terminal 212, respectively. Compared with the outer terminal 211, the holding portion 201 and the contact portion 202 of the inner terminal 212 are closer to the insulating body 1 of the partition wall 15. In the front-rear direction, the contact portion 202 of the outer terminal 211 is disposed forwardly than the contact portion 202 of the inner terminal 212. The contact part 202 of the aforementioned outer terminal 211 first contacts the mating element, and the contact part 202 of the inner terminal 212 contacts the mating element later. This reduces the insertion and removal force, makes the insertion and removal feel better, and avoids the elastic contact arm after long insertion and removal. Deformation and failure, and then ensure long-term electrical connection.

The holding parts 201 of the two power terminals 21 in each power terminal pair 2 are spaced apart along the height direction, and are installed and fixed in the same first terminal slot 13 from the rear side of the mounting part 11 to the front. Each of the holding portions 201 is provided with an interference portion 2011 protruding outwardly on both sides in the transverse direction, and the interference portion 2011 is in interference fit with the corresponding fixing groove 132 of the first terminal groove 13.

As shown in the seventh figure, in the direction from top to bottom, the lengths of the holding portions 201 of the four power terminals 21 in each set of power terminal pairs 2 in the foregoing front-rear direction decrease sequentially, that is, in the upper row Among the two power terminals 21 in the power terminal pair 2, the length of the holding portion 201 of the outer terminal 211 in the front-to-back direction is greater than the length of the holding portion 201 of the inner terminal 212; the two power terminals 21 in the lower row of power terminal pair 2 Among them, the length of the holding portion 201 of the inner terminal 212 in the front-to-rear direction is greater than the length of the holding portion 201 of the outer terminal 211. In addition, the length of the holding portion 201 of the inner terminal 212 of the upper power terminal pair 2 in the front-rear direction is greater than the length of the holding portion 201 of the inner terminal 212 of the lower power terminal pair 2.

The welding portion 203 includes a plate-shaped portion 2031 bent and extended downward from the rear end of the holding portion 201 and a plurality of welding feet 2032 extending downward from the bottom end of the plate-shaped portion 2031. In this embodiment, the plate-shaped portion 2031 The portion 2031 is arranged in parallel with the vertical surface, and the aforementioned solder foot 2032 extends in the vertical direction to be inserted into an external circuit board (not shown).

Each of the aforementioned power terminals 21 has a plurality of elastic contact arms 204 extending forward from the front end of the holding portion 201. The aforementioned contact portions 202 are located on the front side of the corresponding contact arms 204 to contact the aforementioned mating elements, and the aforementioned contact arms 204 are forwardly formed. It passes through the first terminal groove 13 and is received in the mating portion 12.

The angle between the contact arm 204 of the outer terminal 211 and the horizontal plane is greater than the angle between the contact arm 204 of the inner terminal 212 and the horizontal plane. In this embodiment, the inner terminal 212 also has a connecting arm 205 connecting its contact arm 204 with the holding portion 201. The bending and extending directions of the connecting arm 205 and the contact arm 204 are opposite to make the angle between the two The opening faces inward (that is, towards the aforementioned partition wall 15).

Specifically, taking the upper row of power terminal pairs 2 as an example, the aforementioned connecting arm 205 extends forward and upward from the front end of the holding portion 201, and the aforementioned contact arm 204 extends forward and downward from the front end of the aforementioned connecting arm 205. , So that the opening of the angle between the contact arm 204 and the connecting arm 205 faces downward. Further, the two holding parts 201 of the upper power terminal pair 2 and the part (including the plurality of contact arms 204, connecting arms 205 and the contact part 202) on the front side of the aforementioned holding part 201 and the two holding parts of the lower power terminal pair 2 The part 201 and the part on the front side of the holding part 201 are arranged in mirror symmetry.

Please refer to the first to third figures in combination with the ninth figure. In this embodiment, the aforementioned electrical connector 100 further has a plurality of signal terminals 3 located on one side of the aforementioned power terminal pair 2 in the lateral direction. The insulating body 1 further has a plurality of second terminal grooves 16 located on one side of the aforementioned first terminal groove 13.

Each signal terminal 3 includes a fixing portion 31, an insertion portion 32 extending from one end of the fixing portion 31, and a pin 33 extending from the other end of the fixing portion 31. The fixing portion 31 is inserted into and fixed in the second terminal groove 16 from the rear side of the mounting portion 11, and the inserting portion 32 located on the front side of the fixing portion 31 protrudes into the docking portion 12 to realize electrical connection with the docking device. Sexual connection. In this embodiment, barbs 311 are respectively provided on both sides of the fixing portion 31. The barbs 311 and the mounting portion 11 interfere with each other to realize the fixing of the signal terminal 3 in the insulating body 1 and prevent it from being connected to the docking device. The signal terminal 3 shakes when docking, which improves docking stability.

In the electrical connector 100 of the present invention, the contact portions 202 of the two power terminals in the power terminal pair are arranged in a row along the height direction to form the same row of contact portions, and the plural contact portions 202 of the two power terminals are alternately arranged in the transverse direction. It can effectively increase the current channel, improve the heating condition of the power terminal pair 2, and improve the transmission reliability of the electrical connector 100.

Please refer to Figures 10 to 13, which is a second preferred embodiment of the electrical connector of the present invention. The aforementioned electrical connector 100' includes an insulating body 1'and a plurality of power terminals fixed to the aforementioned insulating body 1' Pair 2', in which the basic structure and assembly relationship of the insulating body 1'and the power terminal pair 2'are the same as those of the electrical connector 100 in the first preferred embodiment, and will not be repeated here, and only the differences will be described below. Description:

The top wall 17' of the insulating body 1'is provided with a plurality of first heat dissipation grooves 171', and the first heat dissipation grooves 171' penetrate the top wall 17' in the height direction, and the first heat dissipation grooves and the inner side correspond to the first heat dissipation grooves 171'. The terminal grooves 13' communicate with each other. Further, in this embodiment, the top wall 17' is provided with two rows of the first heat dissipation grooves 171' aligned in the front and rear direction, and each row of the first heat dissipation grooves 171' is arranged side by side in the transverse direction, and is arranged side by side in the front and back direction. In the direction, the length of the first heat dissipation groove 171' located in the front row in the front-rear direction is greater than the length of the first heat dissipation groove 171' located in the rear row in the front-rear direction.

At least the piece of power terminal 21' located on the upper side of each of the aforementioned power terminal pairs 2'has at least one second heat dissipation groove 206', and the aforementioned second heat dissipation groove 206' is opened on the corresponding holding portion 201' and extends along the height direction The holding portion 201' is penetrated. In this embodiment, the holding portions 201' of the two power terminals 21' in each upper row of power terminal pairs 2'are provided with the aforementioned second heat dissipation grooves 206', and each of the lower row of power terminal pairs 2' Among the two power terminals 21 ′, only the power terminal on the upper side (that is, the inner terminal 212 ′ in the lower power terminal pair 2 ′) is provided with the aforementioned second heat dissipation groove 206 ′.

Since the aforementioned holding portion 201' is fixed in the corresponding first terminal slot 13', the heat generated after the aforementioned power terminal 21' is energized can pass through the second heat dissipation slot 206', the first terminal slot 13' and the first heat dissipation slot 171' radiates out to prevent heat from accumulating inside the insulating body 1'.

In addition, the plate-shaped portion 2031' of each power terminal 21' in the upper power terminal pair 2'is provided with at least one third heat dissipation groove 207', and in the height direction, the third heat dissipation groove on the outer terminal 211' The length of 207' is greater than the length of the third heat dissipation groove 207' on the inner terminal 212'. In addition, the projections of the third heat dissipation grooves 207' on the two power terminals 21' of each power terminal pair 2'in the upper row on the vertical plane at least partially overlap, and the aforementioned third heat dissipation grooves 207' are on the vertical plane. The projection of the lower row of first terminal grooves 13' falls inside the projection of the aforementioned vertical plane, that is, the aforementioned third heat dissipation groove 207' is aligned with the aforementioned lower row of first terminal grooves 13' in the front-to-rear direction. In this embodiment, the projection of the third heat dissipation groove 207' on the inner terminal 212' on the vertical plane falls inside the projection of the third heat dissipation groove 207' on the outer terminal 211' on the vertical plane. In this way, the outer heat dissipation channel is larger, so that the heat on the power terminal can be quickly dissipated.

Please refer to Figures 14 to 17, which is a third preferred embodiment of the electrical connector of the present invention. The electrical connector 100" includes an insulating body 1" and is fixed to the insulating body 1". The plurality of power terminal pairs 2” and signal terminals 3”, wherein the basic structure and assembly relationship of the insulating body 1” and the power terminal pair 2” are the same as those of the electrical connector 100 in the first preferred embodiment. This will not be repeated here, and the following will only explain the differences:

The first heat dissipation groove 171'' of the aforementioned insulating body 1'' is opened in the front part of the aforementioned top wall 17'' and is elongated in the front-rear direction, and the aforementioned first heat dissipation groove 171'' is located at the corresponding aforementioned contact portion 202 "Above to expose the contact portion 202" to the outside. The top wall 17" is also provided with a plurality of notches 172" at the rear of the top wall. The notches 172" are in communication with the corresponding first terminal slots, and the rear part of the power terminal pair 2" protrudes from the corresponding notches. Slot 172".

Each of the aforementioned power supply terminal pairs 2" middle and outer terminals 211" has a contact portion 202" and a base portion 208" on the front side of the contact arm 204", and the aforementioned contact portion 202" and the base portion 208" are all derived from the aforementioned The contact arm 204" is formed extending forward, and the aforementioned base portion 208" is located on one side of the aforementioned contact portion 202" in the transverse direction; in this embodiment, the aforementioned contact portion 202" of the aforementioned external terminal 211" is from The side portion of the aforementioned base portion 208" is formed by tearing downwards, and is curved inwardly so that the contact area 2020" and the contact area 2020" of the corresponding inner terminal 212" are roughly arranged in a row .

When it is not docked with the mating component, the contact area 2020” of the aforementioned outer terminal 211” is located inside the contact area 2020” of the corresponding inner terminal 212”; when it is docked with the mating component, the power terminal pair located in the same row The contact area 2020" of the 2" contact portion 202" is on the same horizontal plane. In addition, in this embodiment, in the front-rear direction, the contact area 2020" of the contact portion 202" of the outer terminal 211" is greater than the contact area 2020' of the contact portion 202" of the inner terminal 212". 'Set back.

In addition, the inner terminal 212" and the outer terminal 211" of the aforementioned power terminal pair 2" are arranged in a height direction, and have a fixing structure combining each other so that the two are stacked and fixed. In this embodiment, the aforementioned The fixing structure is a protruding portion 2112" and a positioning groove 2121" that cooperate with each other. Further, the outer terminal 211" has at least one protruding portion 2112" protruding toward the inner terminal 212", and the inner terminal 212" has a positioning groove 2121" for inserting and fixing the aforementioned convex portion 2112".

The aforementioned electrical connector 100" also has a positioning base 4" that simultaneously fixes the signal terminal 3" and the aforementioned power terminal pair 2" in the insulating housing 1", and the aforementioned positioning base 4" is elongated and There are a plurality of through holes 41" for the solder feet 2032" and pins 33" to pass through.

In particular, it needs to be pointed out that for those of ordinary skill in the art, equivalent changes made to the present invention under the teaching of the present invention should still be included in the claimed scope of the patent application of the present invention.

100, 100', 100'': electrical connector 1, 1', 1'': insulating body 11: Installation Department 111: The first mounting surface 112: second mounting surface 113: Third mounting surface 12: Docking Department 120: docking space 121: front face 13, 13': the first terminal slot 131: Channel 132: fixed slot 14: compartment 15: next door 16: second terminal slot 17', 17'': top wall 171', 171'': the first heat sink 172'': missing groove 2, 2', 2'': Power terminal pair 201, 201': Holding part 2011: Intervention Department 202, 202'': contact part 2020, 2020'': contact area 203: Welding Department 2031, 2031': plate part 2032, 2032'': solder feet 204: Contact Arm 205: connecting arm 206': second heat sink 207': third heat sink 208'': base body 21, 21': power terminal 211, 211', 211'': external terminal 2112'': convex 212, 212', 212'': inner terminal 2121'': positioning slot 3, 3'': signal terminal 31: Fixed part 311: Barb 32: Socket 33, 33'': pin 4'': positioning seat 41'': Through hole

The first figure is a three-dimensional assembly diagram of the first preferred embodiment of the electrical connector of the present invention. The second figure is a three-dimensional exploded view of the electrical connector shown in the first figure. The third figure is a view from another perspective of the electrical connector shown in the first figure. The fourth figure is a three-dimensional schematic diagram of the insulating body of the electrical connector shown in the second figure. The fifth figure is a three-dimensional schematic diagram of a group of power terminal pairs of the electrical connector shown in the second figure. Figure 6 is an exploded perspective view of a power terminal pair of the electrical connector shown in Figure 5. Figure 7 is a side view of a power terminal pair of the electrical connector shown in Figure 5. Figure 8 is a schematic cross-sectional view of the electrical connector shown in Figure 1. Figure 9 is a schematic cross-sectional view of the electrical connector shown in Figure 1 with one power terminal pair removed. The tenth figure is a three-dimensional assembly view of the second preferred embodiment of the electrical connector of the present invention. Figure 11 is an exploded perspective view of the electrical connector shown in Figure 10. Figure 12 is a partial exploded view of a power terminal pair of the electrical connector shown in Figure 11. Figure 13 is a schematic cross-sectional view of the electrical connector shown in Figure 10. Figure 14 is a three-dimensional assembly view of the third preferred embodiment of the electrical connector of the present invention. Figure 15 is a three-dimensional exploded view of the electrical connector shown in Figure 14. Figure 16 is a partial exploded view of a power terminal pair of the electrical connector shown in Figure 15. Figure 17 is a side view of a power terminal pair of the electrical connector shown in Figure 15.

201: Holding Department

2011: Intervention Department

202: Contact

203: Welding Department

204: Contact Arm

Claims (10)

An electrical connector, which includes: The insulating body has a mounting portion for mounting on the circuit board, a butting portion extending forward from the aforementioned mounting portion, and a plurality of terminal slots extending in the front-to-back direction; and A plurality of power terminal pairs are fixed in the corresponding terminal grooves of the aforementioned insulating body and divided into at least two rows arranged along the height direction. Each aforementioned power terminal pair in each row includes two power terminals, and each power terminal includes Corresponding to the holding portion in the terminal slot, a plurality of contact portions extending forward from the front end of the holding portion, and a welding portion extending from the rear end of the holding portion, the welding portion having a plurality of welding feet extending downward; The contact portions of the two power terminals in each of the aforementioned power terminal pairs are alternately and cyclically arranged in the transverse direction. The electrical connector described in item 1 of the scope of patent application, wherein the aforementioned power terminal pairs are arranged in pairs along the height direction to form a group, and the two power terminal pairs in each group of power terminal pairs are arranged oppositely and spaced apart along the aforementioned height direction . The electrical connector described in item 2 of the scope of patent application, wherein the contact portions of the aforementioned power terminal pairs located in the same row are arranged in two rows staggered in the front-rear direction. The electrical connector described in item 3 of the scope of the patent application, wherein the contact areas of the contact portions of the aforementioned power terminal pairs located in the same row are on the same level when they are mated with the mating component. As for the electrical connector described in item 3 or 4 of the scope of the patent application, two adjacent contact portions in the same row are staggered in the front-to-rear direction. For the electrical connector described in item 2 of the scope of patent application, the two power terminals in each pair of power terminals are an outer terminal and an inner terminal, respectively, and the holding portion of the two power terminals in each pair of power terminals They are arranged in a row along the height direction, and are installed and fixed in the same first terminal groove from the rear side of the installation part forwards. The electrical connector described in item 6 of the scope of patent application, wherein the angle between the contact arm of the outer terminal and the horizontal plane is greater than the angle between the contact arm of the inner terminal and the horizontal plane. For the electrical connector described in item 6 of the scope of the patent application, in the direction from top to bottom, the lengths of the four power terminals in each group of power terminals are sequentially reduced along the front and rear directions. The electrical connector described in item 6 of the scope of patent application, wherein the top wall of the insulating body is provided with a plurality of first heat dissipation grooves penetrating it in the height direction, and the first heat dissipation groove and the first terminal groove corresponding to the inner side Connected. In the electrical connector described in item 9 of the scope of patent application, each of the first heat dissipation grooves is a long strip extending in the front-to-rear direction, and is located above the corresponding contact portion to expose the contact portion to the outside.

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