Electric connector

Abstract

The invention provides an electric connector, which is provided with an insulating body with a butt joint space and a plurality of power supply terminals with a plurality of terminal groups, and each terminal group is provided with a holding part fixed in the insulating body and a contact part protruding into the butt joint space in the same direction; the terminal group comprises an upper terminal group of which the holding part is positioned on the upper side of the horizontal central plane of the butt joint space and a lower terminal group of which the holding part is positioned on the lower side of the horizontal central plane of the butt joint space; each of the upper terminal group and the lower terminal group comprises a first power supply terminal and a second power supply terminal, wherein the holding part of the first power supply terminal is close to the horizontal central plane of the butt joint space, and the holding part of the second power supply terminal is far away from the horizontal central plane of the butt joint space. And the first power supply terminal is also provided with a turning part which is positioned between the contact part and the holding part and protrudes towards the second power supply terminal in the same terminal group. The electric connector can transmit large current and can effectively improve the heating condition of the power supply terminal pair.

Description

[0001] This application is a divisional application of the patent application with application number 201910716350.0, application date 2019.08.05, and invention title "Electric connector". TECHNICAL FIELD

[0002] The present application relates to an electric connector, in particular to an electric connector capable of effectively improving the heating condition of the conductive terminal. BACKGROUND

[0003] The power terminal of the conventional electric connector is usually formed with one or multiple contact arms from the front end of the metal sheet. When the electric connector transmits current, the highest temperature position of the power terminal is the contact point area of the contact arm. Since the contact mode of the contact point is only linear contact, the current channel is limited. When the power terminal transmits large current, the conductor passage is easily limited, which causes the heat generated by current impedance to be too high, thereby exceeding the temperature range that the electric connector can withstand.

[0004] Therefore, it is necessary to improve the existing electric connector to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide an electric connector capable of increasing the conductor passage and effectively inhibiting the heating of the conductive terminal.

[0006] To achieve the above-mentioned purpose, the present application provides an electric connector, which comprises an insulating body formed with a mating space and a plurality of power terminals arranged in the insulating body. The plurality of power terminals form a plurality of terminal groups, each terminal group having a holding portion fixed in the insulating body and a contact portion protruding into the mating space from the holding portion in the same direction. The terminal groups include an upper terminal group with the holding portion located on the upper side of the horizontal center plane of the mating space and a lower terminal group with the holding portion located on the lower side of the horizontal center plane of the mating space. The upper terminal group and the lower terminal group each include a first power terminal with the holding portion arranged close to the horizontal center plane of the mating space and a second power terminal with the holding portion arranged away from the horizontal center plane of the mating space. The first power terminal has a turning portion located between the contact portion and the holding portion and protruding towards the second power terminal in the same terminal group.

[0007] As a further improvement of the present application, the contact portion has a contact area protruding towards the horizontal center plane of the mating space. In each upper terminal group and the lower terminal group arranged opposite to it, the first power terminals of the upper terminal group and the lower terminal group gradually reduce in the height direction from the turning portion to the contact area, and also gradually reduce in the height direction from the turning portion to the holding portion.

[0008] As a further improvement of the present application, in each terminal group, the number of bends between the holding portion and the contact portion in the first power terminal is more than the number of bends between the holding portion and the contact portion in the second power terminal.

[0009] As a further improvement of the present application, the contact portion has a contact area protruding towards the horizontal center plane of the mating space; in the same terminal group, the contact areas of the first power terminal and the second power terminal are staggered in the front-rear direction.

[0010] As a further improvement of the present application, in each upper terminal group and the lower terminal group arranged opposite thereto, the length of the holding portion of the power terminal in the front-rear direction decreases in sequence from top to bottom.

[0011] To achieve the above-mentioned purposes, the present application further provides an electrical connector, which comprises an insulating body formed with a mating space and a plurality of power terminals arranged in the insulating body, the plurality of power terminals form a plurality of terminal groups, each terminal group has a holding portion fixed in the insulating body and a contact portion protruding into the mating space from the holding portion in the same direction; the terminal groups include an upper terminal group with the holding portion located on the upper side of the horizontal center plane of the mating space and a lower terminal group with the holding portion located on the lower side of the horizontal center plane of the mating space, the upper terminal group and the lower terminal group each include a first power terminal with the holding portion arranged close to the horizontal center plane of the mating space and a second power terminal with the holding portion arranged away from the horizontal center plane of the mating space, in the same terminal group, the projection of the holding portion of the first power terminal and the holding portion of the second power terminal on the horizontal plane are at least partially overlapped.

[0012] As a further improvement of the present application, the contact portion has a contact area protruding towards the horizontal center plane of the mating space; in the same terminal group, the contact areas of the first power terminal and the second power terminal are staggered in the front-rear direction.

[0013] As a further improvement of the present application, in each upper terminal group and the lower terminal group arranged opposite thereto, the length of the holding portion of the power terminal in the front-rear direction decreases in sequence from top to bottom.

[0014] To achieve the above-mentioned objective, the present invention also provides an electrical connector, comprising an insulating body having a mating space and a plurality of power terminals disposed within the insulating body. The plurality of power terminals form multiple terminal groups, each terminal group having a retaining portion fixed within the insulating body and a contact portion protruding into the mating space from the retaining portion in the same direction. The terminal group includes an upper terminal group with the retaining portion located above the horizontal center plane of the mating space and a lower terminal group with the retaining portion located below the horizontal center plane of the mating space. Both the upper and lower terminal groups include a first power terminal disposed with the retaining portion near the horizontal center plane of the mating space and a second power terminal disposed with the retaining portion away from the horizontal center plane of the mating space. The contact portions of the first power terminal and the second power terminal in the same terminal group are arranged along the transverse direction of the insulating body, and the two outermost contact portions disposed opposite each other in the transverse direction belong to the first power terminal and the second power terminal, respectively.

[0015] As a further improvement of the present invention, in the same terminal group, the number of contacts of the first power terminal is equal to the number of contacts of the second power terminal.

[0016] The beneficial effects of the present invention are as follows: The electrical connector of the present invention sets the power terminals as an upper terminal group located above the horizontal center plane of the mating space and a lower terminal group located below the horizontal center plane of the mating space. The first power terminal, which is located near the horizontal center plane of the mating space, has a turning portion that is located between its contact portion and the holding portion and protrudes toward the second power terminal in the same terminal group. This can effectively increase the current channel, reduce the heat generation of the power terminal pair, improve the transmission reliability of the electrical connector, and reduce the temperature rise during high current transmission. The setting of the turning portion enables the contact portion of the first power terminal to have better elastic deformation ability to ensure continuous and stable contact. Attached Figure Description

[0017] Figure 1 This is a three-dimensional assembly diagram of the first preferred embodiment of the electrical connector of the present invention.

[0018] Figure 2 yes Figure 1 An exploded perspective view of the electrical connector shown.

[0019] Figure 3 yes Figure 1 Another view of the electrical connector shown.

[0020] Figure 4 yes Figure 2 A three-dimensional schematic diagram of the insulating body of the electrical connector shown.

[0021] Figure 5 yes Figure 2A three-dimensional schematic diagram of a set of power terminal pairs of the electrical connector shown.

[0022] Figure 6 yes Figure 5 An exploded perspective view of a set of power terminal pairs of the electrical connector shown.

[0023] Figure 7 yes Figure 5 A side view of a set of power terminal pairs of the electrical connector shown.

[0024] Figure 8 yes Figure 1 A cross-sectional view of the electrical connector shown.

[0025] Figure 9 yes Figure 1 The diagram shows a cross-sectional view of the electrical connector after one of its power terminals has been removed.

[0026] Figure 10 This is a three-dimensional assembly diagram of the second preferred embodiment of the electrical connector of the present invention.

[0027] Figure 11 yes Figure 10 An exploded 3D view of the electrical connector shown.

[0028] Figure 12 yes Figure 11 A partially exploded view of a set of power terminal pairs of the electrical connector shown.

[0029] Figure 13 yes Figure 10 A cross-sectional view of the electrical connector shown.

[0030] Figure 14 This is a three-dimensional assembly diagram of the third preferred embodiment of the electrical connector of the present invention.

[0031] Figure 15 yes Figure 14 An exploded 3D view of the electrical connector shown.

[0032] Figure 16 yes Figure 15 A partially exploded view of a set of power terminal pairs of the electrical connector shown.

[0033] Figure 17 yes Figure 15 A side view of a set of power terminal pairs of the electrical connector shown. Detailed Implementation

[0034] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0035] Please refer to Figures 1 to 9 The diagram shows a first preferred embodiment of the electrical connector of the present invention. The electrical connector 100 includes an insulating body 1 having a mating space 120 and a plurality of power terminals 21 fixed to the insulating body 1. The power terminals 21 are arranged in pairs opposite to each other within the insulating body 1. Each pair of power terminals 21 is referred to as a power terminal pair 2 or a terminal group in the following description.

[0036] For ease of explanation, the following description will take the mating end of the electrical connector 100 as the front end and the other end opposite to the mating end as the rear end. That is, the front-back direction is the mating direction of the electrical connector 100 and the mating element (not shown). At the same time, one direction perpendicular to the front-back direction is defined as the lateral direction and the other direction perpendicular to the front-back direction is defined as the height direction. In this embodiment, the dimension of the insulating body 1 in the lateral direction is larger than its dimensions in the height direction and the front-back direction.

[0037] Please refer to Figures 1 to 4 and combined Figures 8 to 9 As shown, in this invention, the insulating body 1 has a mounting portion 11 for mounting on a circuit board (not shown), a mating portion 12 extending forward from the mounting portion 11, a plurality of first terminal slots 13 extending in a front-rear direction, and a plurality of partitions 14 extending in a front-rear direction, with one partition 14 disposed between every two adjacent first terminal slots 13. The first terminal slots 13 penetrate the insulating body 1 in the front-rear direction, and the partitions 14 extend forward from the base 11 to the front end face 121 of the mating portion 12.

[0038] The docking portion 12 has a docking space 120 that is open to the front to accommodate a docking element, and the first terminal slot 13 is connected to the docking space 120.

[0039] In this embodiment, the insulating body 1 has upper and lower rows of first terminal slots 13 and a partition wall 15 formed between the upper and lower rows of first terminal slots 13. The partition wall 15 extends in the transverse direction and is formed inside the base 11, separating the upper and lower rows of first terminal slots 13. Further, the partition wall 15 extends forward to the front end face of the base 11, but does not extend forward into the mating portion 12.

[0040] The rear side of the base 11 has a first mounting surface 111, a second mounting surface 112 and a third mounting surface 113 spaced apart in the front-back direction, wherein the third mounting surface 113, the second mounting surface 112 and the first mounting surface 111 are arranged sequentially in the front-back direction.

[0041] Please refer to Figure 4 and Figure 9As shown, in the present embodiment, the first terminal groove 13 comprises a through groove 131 penetrating the base 11 along the front-rear direction and a plurality of fixing grooves 132 communicating with the through groove 131, the fixing grooves 132 are arranged in pairs and symmetrically, in the present embodiment, the first terminal groove 13 has two pairs of fixing grooves 132 arranged along the height direction, the two fixing grooves 132 in each pair are respectively arranged on the two sides of the through groove 131 along the lateral direction. In the same first terminal groove 13, the extending length of the fixing groove 132 on the upper side along the front-rear direction is greater than that of the fixing groove 132 on the lower side.

[0042] Please refer to Figures 5 to 9 As shown, the power terminal pair 2 is accommodated in the corresponding first terminal groove 13, and each power terminal pair 2 comprises two power terminals 21, each power terminal 21 is provided with 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, the contact portions 202 of the two power terminals 21 in each power terminal pair 2 are arranged in a row along the height direction, and the contact portions 202 of the two power terminals 21 are arranged alternately along the lateral direction. Of course, the contact portions 202 of the two power terminals 21 in each power terminal pair 2 can also be arranged staggered along the height direction, as long as when the mating element is mated, the contact portions 202 of the two power terminals 21 in each power terminal pair 2 are arranged on the same horizontal plane along the height direction.

[0043] The plurality of power terminals 21 form a plurality of terminal groups, each terminal group has the holding portion 201 fixed in the insulating body 1 and the contact portion 202 protruding into the mating space 120 from the holding portion 201. The terminal group comprises an upper terminal group 2a accommodated in the upper row of first terminal grooves 13 and a lower terminal group 2b accommodated in the lower row of first terminal grooves 13. The holding portion 201 of the upper terminal group 2a is located on the upper side of the horizontal center plane of the mating space 120, and the holding portion 201 of the lower terminal group 2b is located on the lower side of the horizontal center plane of the mating space 120.

[0044] The upper terminal group 2a and the lower terminal group 2b each comprise a first power terminal with the holding portion 201 arranged close to the horizontal center plane of the mating space 120 and a second power terminal with the holding portion 201 arranged away from the horizontal center plane of the mating space 120. The first power terminal further has a turning portion 209 located between the contact portion 202 and the holding portion 201 and protruding towards the second power terminal in the same terminal group.

[0045] As Figures 5 to 8As shown, the projections of the holding portions 201 of the first power terminals and the holding portions 201 of the second power terminals in the same terminal group on the horizontal plane are arranged at least partially overlapping. That is, the projections of the holding portions 201 of the upper terminal group 2a on the horizontal plane are arranged at least partially overlapping, and the projections of the holding portions 201 of the lower terminal group 2b on the horizontal plane are also arranged at least partially overlapping.

[0046] The upper terminal group 2a and the lower terminal group 2b are arranged in pairs along the height direction and are arranged oppositely and spaced apart. In the front-rear direction, the soldering portions 203 of the upper terminal group 2a are located at the rear side of the second mounting surface 112, and the soldering portions of the lower terminal group 2b are located between the second mounting surface 112 and the third mounting surface 113.

[0047] In the present embodiment, each power terminal 21 has three contact portions 202 formed extending forward from the holding portion 201 thereof, the holding portion 201 being a sheet-shaped structure parallel to the horizontal plane, and the contact portions 202 being curved and having contact regions 2020 protruding toward the partition wall 15, that is, the contact regions 2020 protrude toward the horizontal center plane of the mating space 120.

[0048] The contact portions 202 of the first power terminals and the contact portions 202 of the second power terminals in the same terminal group are arranged in the transverse direction of the insulating body 1 and oppositely arranged at the outermost sides in the transverse direction, and the two contact portions 202 oppositely arranged at the outermost sides in the transverse direction belong to the first power terminals and the second power terminals, respectively. That is, the two contact portions 202 oppositely arranged at the outermost sides in the transverse direction in the same terminal group belong to different power terminals. In this way, by differentiating the design of the contact portions at the outermost sides, the skin effect and the proximity effect can be effectively suppressed, the impedance and the heat generation can be reduced, the current loop can be optimized, and stable power supply can be provided, while the stress distribution is more uniform, and the overall structural stability and the plug-in durability are enhanced.

[0049] In the present embodiment, in the same terminal group, the number of the contact portions 202 of the first power terminals is equal to the number of the contact portions 202 of the second power terminals.

[0050] In each upper terminal group 2a and the lower terminal group 2b oppositely arranged therewith, in the direction from the turning portion 209 to the contact region 2020, the spacing of the first power terminals of the upper terminal group 2a and the lower terminal group 2b in the height direction gradually decreases, and in the direction from the turning portion 209 to the holding portion 201, the spacing of the first power terminals of the upper terminal group 2a and the lower terminal group 2b in the height direction also gradually decreases.

[0051] In each terminal group, the number of bends between the holding portion 201 and the contact portion 202 of the first power terminal is greater than the number of bends between the holding portion 201 and the contact portion 202 of the second power terminal. In the upward direction, the length of the holding portion 201 of the power terminal in each upper terminal group 2a and the lower terminal group 2b arranged opposite thereto in the front-rear direction decreases in turn.

[0052] The contact portions 202 of the power terminal pairs 2 in the same row are arranged in two columns offset in the front-rear direction. At the same time, the contact regions 2020 of the contact portions 202 of the power terminal pairs 2 in the same row are at or substantially at the same horizontal plane. Further, two adjacent contact portions 202 in the same row are arranged offset in the front-rear direction. That is, in the present application, in the upper terminal group 2a, the contact portion 202 of the first power terminal and the contact portion 202 of the second power terminal are arranged offset in the front-rear direction; in the lower terminal group 2b, the contact portion 202 of the first power terminal and the contact portion 202 of the second power terminal are arranged offset in the front-rear direction. In this way, when the mating element is inserted, the contact portions 202 arranged in two columns offset in the front-rear direction can be in contact with the mating element in turn, respectively, to achieve multi-level and multi-contact-point contact, so that the contact is more sufficient, the stability of electrical connection and the stability of current transmission are enhanced, and at the same time, the plug force distribution between the mating element and the contact surface is uniform, and the heat quantity of the contact surface is reduced.

[0053] Please refer to Figures 6 to 8 As shown in FIG. 1, the holding portion 201 of the first power terminal is arranged closer to the horizontal center plane of the mating space 120 than the holding portion 201 of the second power terminal, so that in the upper terminal group 2a and the lower terminal group 2b, the second power terminal is regarded as an outer terminal 211, and the first power terminal is regarded as an inner terminal 212. The holding portion 201 and the contact portion 202 of the inner terminal 212 are closer to the partition wall 15 of the insulating body 1 than the outer terminal 211, that is, closer to the horizontal center plane of the mating space 120. In the front-rear direction, the contact portion 202 of the outer terminal 211 is arranged in front of the contact portion 202 of the inner terminal 212. The contact portion 202 of the outer terminal 211 is first in contact with the mating element, and the contact portion 202 of the inner terminal 212 is later in contact with the mating element, so as to reduce the plug force, so that the plug feel is better, and the deformation and failure of the elastic contact arm after long-term plugging are avoided, thereby ensuring long-term electrical connection.

[0054] In each terminal group 2, the retaining portions 201 of the two power terminals 21 are spaced apart along the height direction and are fixedly mounted in the same first terminal slot 13 from the rear side of the base 11 forward. Each retaining portion 201 has an outwardly protruding interference portion 2011 on both sides in the transverse direction, and the interference portion 2011 interferes with the corresponding fixing slot 132 of the first terminal slot 13.

[0055] like Figure 7 As shown, from top to bottom, the lengths of the four retaining portions 201 of the upper terminal group 2a and the lower terminal group 2b decrease sequentially in the front-back direction. That is, in the upper terminal group 2a, the length of the retaining portion 201 of the second power terminal (outer terminal 211) in the front-back direction is greater than the length of the retaining portion 201 of the first power terminal (inner terminal) 212; in the lower terminal group 2b, the length of the retaining portion 201 of the first power terminal (inner terminal 212) in the front-back direction is greater than the length of the retaining portion 201 of the second power terminal (outer terminal 211). Simultaneously, the length of the retaining portion 201 of the first power terminal (inner terminal 212) in the upper terminal group 2a is greater than the length of the retaining portion 201 of the first power terminal (inner terminal 212) in the lower terminal group 2b.

[0056] In this embodiment, the welding part 203 includes a plate-shaped part 2031 that bends downward from the rear end of the holding part 201 and a plurality of welding feet 2032 that extend downward from the bottom end of the plate-shaped part 2031. In this embodiment, the plate-shaped part 2031 is arranged parallel to the vertical plane, and the welding feet 2032 extend in the vertical direction to be inserted into an external circuit board (not shown).

[0057] Each of the power terminals 21 has a plurality of elastic contact arms 204 extending forward from the front end of its retaining portion 201. The contact portion 202 is located in front of the corresponding contact arm 204 to contact the docking element. The contact arm 204 passes forward through the first terminal slot 13 and is received in the docking portion 12.

[0058] 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 that connects its contact arm 204 to the retaining portion 201. The bending extension direction of the connecting arm 205 is opposite to that of the contact arm 204 so that the opening of the angle between them faces inward (i.e., towards the spacer wall 15).

[0059] Specifically, taking the upper terminal group 2a as an example, the connecting arm 205 extends forward and upward from the front end of the holding part 201, and the contact arm 204 extends forward and downward from the front end of the connecting arm 205, so that the included angle opening between the contact arm 204 and the connecting arm 205 faces downward. Further, the two holding parts 201 of the upper terminal group 2a and the part located in front of the holding part 201 (including several contact arms 204, connecting arms 205 and contact parts 202) are mirror-symmetrically arranged with the two holding parts 201 of the lower terminal group 2b and the part located in front of the holding part 201.

[0060] Please refer to Figures 1 to 3 and in combination Figure 9 As shown in the drawings, in the embodiment, the electrical connector 100 further has a plurality of signal terminals 3 located on one side of the power terminal pair 2 in the transverse direction, and the insulating body 1 further has a plurality of second terminal grooves 16 located on one side of the first terminal groove 13.

[0061] Each signal terminal 3 includes a fixed part 31, a plug-in part 32 extending from one end of the fixed part 31, and a pin 33 extending from the other end of the fixed part 31. The fixed part 31 is inserted into and fixed in the second terminal groove 16 from the rear side of the base part 11, and the plug-in part 32 located in front of the fixed part 31 protrudes into the mating part 12 to achieve electrical connection with the mating device. In the embodiment, the fixed part 31 is provided with barbs 311 on both sides, respectively, which interfere with the base part 11 to achieve the fixation of the signal terminal 3 in the insulating body 1, prevent the signal terminal 3 from shaking when mating with the mating device, and improve the mating stability.

[0062] The electrical connector 100 sets the power terminals 21 as the upper terminal group 2a located on the upper side of the horizontal center plane of the mating space 120 and the lower terminal group 2b located on the lower side of the horizontal center plane of the mating space 120, and the holding part 201 of the first power terminal close to the horizontal center plane of the mating space 120 has a turning part 209 located between the contact part 202 and the holding part 201 and protruding towards the second power terminal in the same terminal group, which can effectively increase the current channel, reduce the heating of the power terminal pair 2, improve the transmission reliability of the electrical connector 100, and also can reduce the temperature rise when transmitting large current. The setting of the turning part 209 makes the contact part 202 of the first power terminal have better elastic deformation ability to ensure continuous and stable contact.

[0063] Please refer to Figures 10 to 13As shown, the second preferred embodiment of the electric connector of the present application is provided, the electric connector 100' comprises an insulating body 1' and a plurality of power terminal pairs 2' fixed to the insulating body 1', wherein the basic structure and assembly relationship of the insulating body 1' and the power terminal pairs 2' are the same as those of the electric connector 100 in the first preferred embodiment, which will not be described herein again, and only the differences will be described below: A plurality of first heat dissipation grooves 171' are formed on the top wall 17' of the insulating body 1', the first heat dissipation grooves 171' penetrate the top wall 17' along the height direction, and the first heat dissipation grooves are in communication with the corresponding first terminal grooves 13' on the inner side thereof. Further, in the present embodiment, the top wall 17' is provided with two rows of first heat dissipation grooves 171' arranged in alignment in the front-rear direction, each row of first heat dissipation grooves 171' is arranged side by side in the lateral direction, and in the front-rear direction, the length of the first heat dissipation grooves 171' in the front row in the front-rear direction is greater than that of the first heat dissipation grooves 171' in the rear row in the front-rear direction.

[0064] At least the power terminal 21' on the upper side in each power terminal pair 2' has at least one second heat dissipation groove 206', which is formed on the corresponding holding portion 201' and penetrates the holding portion 201' along the height direction. In the present embodiment, the holding portions 201' of the two power terminals 21' in each upper terminal group 2a' are provided with the second heat dissipation grooves 206', and among the two power terminals 21' in each lower terminal group 2b', only the power terminal on the upper side (i.e. the inner terminal 212' in the lower terminal group 2b') is provided with the second heat dissipation groove 206'.

[0065] Since the holding portion 201' is fixed in the corresponding first terminal groove 13', the heat generated by the power terminal 21' after being electrified can be dissipated through the second heat dissipation groove 206', the first terminal groove 13' and the first heat dissipation groove 171', thereby avoiding the accumulation of heat inside the insulating body 1'.

[0066] Meanwhile, the plate-shaped portion 2031' of each power terminal 21' in the upper terminal set 2a' is provided with at least one third heat dissipation groove 207', and in the height direction, the length of the third heat dissipation groove 207' on the outer terminal 211' 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' in each power terminal pair 2' in the upper row at least partially overlap in the vertical plane, and the projections of the third heat dissipation grooves 207' in the vertical plane fall within the projection of the lower row of first terminal grooves 13' in the vertical plane, that is, the third heat dissipation grooves 207' are arranged in alignment with the lower row of first terminal grooves 13' in the front-rear direction. In this embodiment, the projection of the third heat dissipation groove 207' on the inner terminal 212' in the vertical plane falls within the projection of the third heat dissipation groove 207' on the outer terminal 211' in the vertical plane. In this way, the heat dissipation channel on the outer side is larger, facilitating the rapid dissipation of heat from the power terminals.

[0067] Please refer to Figures 14 to 17 As shown in FIG. 10, which is a third preferred embodiment of the electrical connector of the present application, the electrical connector 100'' comprises an insulating body 1'', a plurality of power terminal pairs 2'' and signal terminals 3'' fixed to the insulating body 1'', wherein the basic structure and assembly relationship of the insulating body 1'' and the power terminal pairs 2'' are the same as those of the electrical connector 100 in the first preferred embodiment, and will not be described again here, and only the differences will be described below: The first heat dissipation groove 171'' of the insulating body 1'' is provided on the front portion of the top wall 17'' and is a long strip extending in the front-rear direction, and the first heat dissipation groove 171'' is located above the corresponding contact portion 202'' to expose the contact portion 202'' outward. The top wall 17'' is also provided with a plurality of missing grooves 172'' located at the rear portion thereof, the missing grooves 172'' are in communication with the corresponding first terminal grooves, and the rear portion of the power terminal pair 2'' protrudes into the corresponding missing groove 172''.

[0068] The outer terminal 211" of each of the power terminal pairs 2" has a contact portion 202" and a base portion 208" located at the front side of the contact arm 204", both of which are formed by extending forward from the contact arm 204", and the base portion 208" is located at one side of the contact portion 202" in the lateral direction; in this embodiment, the contact portion 202" of the outer terminal 211" is formed by tearing down from the side of the base portion 208", and is curved inwardly to form an arch shape so that the contact area 2020" is substantially in line with the contact area 2020" of the corresponding inner terminal 212", in addition, in this embodiment, the contact area 2020" of the outer terminal 211" and the contact area 2020" of the corresponding inner terminal 212" are arranged staggered in the front-rear direction, further, referring to Figure 17 as shown, in the front-rear direction, the contact area 2020" of the contact portion 202" of the outer terminal 211" is arranged behind the contact area 2020" of the contact portion 202" of the inner terminal 212".

[0069] Referring to Figure 17 as shown, the inner terminal 212" also has a contact arm 204" and a connecting arm 205" connecting the contact arm 204" and the holding portion 201", 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 addition, the contact arm 204" and the connecting arm 205" of the inner terminal 212" both extend forward and rearward while tilting upward, but the angles between the contact arm 204" and the connecting arm 205" of the inner terminal 212" and the horizontal plane are different, and the angle between the connecting arm 205" and the horizontal plane is greater than the angle between the contact arm 204" and the horizontal plane.

[0070] When not mated with the mating element, the contact area 2020" of the outer terminal 211" is located inward of the contact area 2020" of the corresponding inner terminal 212"; when mated with the mating element, the contact areas 2020" of the contact portions 202" of the power terminal pairs 2" in the same row are on the same horizontal plane.

[0071] Meanwhile, the inner terminal 212'' and the outer terminal 211'' of the power terminal pair 2'' are arranged along the height direction and have a fixing structure combined with each other to stack and fix them. In this embodiment, the fixing structure is a matching protrusion 2112'' and a positioning slot 2121''. Further, the outer terminal 211'' has at least one protrusion 2112'' protruding towards the inner terminal 212'', and the inner terminal 212'' has a positioning slot 2121'' for the protrusion 2112'' to insert and fix. In other embodiments, the fixing structure on the outer terminal 211'' and the inner terminal 212'' can be interchanged.

[0072] The electric connector 100'' further has a positioning seat 4'' for simultaneously fixing the signal terminal 3'' and the power terminal pair 2'' in the insulating body 1''. The positioning seat 4'' is long and has a plurality of through holes 41'' for the soldering legs 2032'' and the pins 33'' to pass through.

[0073] The above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application.

Claims

1. An electrical connector comprising an insulating body formed with a mating space and a plurality of power terminals disposed in the insulating body, the plurality of power terminals forming a plurality of terminal groups, characterized in that: Each terminal group has a holding portion fixed in the insulating body and a contact portion protruding into the mating space from the holding portion; the terminal groups include an upper terminal group with the holding portion located on the upper side of the horizontal center plane of the mating space and a lower terminal group with the holding portion located on the lower side of the horizontal center plane of the mating space, the upper terminal group and the lower terminal group each include a first power terminal with the holding portion located close to the horizontal center plane of the mating space and a second power terminal with the holding portion located away from the horizontal center plane of the mating space, the first power terminal further has a turning portion located between the contact portion and the holding portion and protruding towards the second power terminal in the same terminal group.

2. The electrical connector of claim 1, wherein: The contact portion has a contact area protruding towards the horizontal center plane of the mating space; in each upper terminal group and the lower terminal group located opposite to the upper terminal group, the first power terminals of the upper terminal group and the lower terminal group gradually reduce in the height direction from the turning portion to the contact area, and gradually reduce in the height direction from the turning portion to the holding portion.

3. The electrical connector of claim 1, wherein: In each terminal group, the first power terminal has more bending times between the holding portion and the contact portion than the second power terminal.

4. The electrical connector of claim 1, wherein: The contact portion has a contact area protruding towards the horizontal center plane of the mating space; in the same terminal group, the contact areas of the first power terminal and the second power terminal are staggered in the front-rear direction.

5. The electrical connector of claim 1, wherein: In each upper terminal group and the lower terminal group located opposite to the upper terminal group, the holding portions of the power terminals gradually reduce in the front-rear direction from the top to the bottom.

6. An electrical connector comprising an insulating body formed with mating spaces and a plurality of power terminals disposed in the insulating body, the plurality of power terminals forming a plurality of terminal groups, characterized in that: Each terminal group has a holding portion fixed in the insulating body and a contact portion protruding into the mating space from the holding portion; the terminal groups include an upper terminal group with the holding portion located on the upper side of the horizontal center plane of the mating space and a lower terminal group with the holding portion located on the lower side of the horizontal center plane of the mating space, the upper terminal group and the lower terminal group each include a first power terminal with the holding portion located close to the horizontal center plane of the mating space and a second power terminal with the holding portion located away from the horizontal center plane of the mating space, in the same terminal group, the holding portion of the first power terminal and the holding portion of the second power terminal are at least partially overlapped in the horizontal plane.

7. The electrical connector of claim 6, wherein: The contact portion has a contact area protruding towards the horizontal center plane of the mating space; in the same terminal group, the contact areas of the first power terminal and the second power terminal are staggered in the front-rear direction.

8. The electrical connector of claim 6, wherein: In each upper terminal group and the lower terminal group located opposite to the upper terminal group, the holding portions of the power terminals gradually reduce in the front-rear direction from the top to the bottom.

9. An electrical connector comprising an insulating body formed with a mating space and a plurality of power terminals disposed in the insulating body, the plurality of power terminals forming a plurality of terminal groups, characterized by: Each terminal group has a holding portion fixed in the insulating body and a contact portion protruding into the docking space from the holding portion; the terminal group includes an upper terminal group with the holding portion located on the upper side of the horizontal center plane of the docking space and a lower terminal group with the holding portion located on the lower side of the horizontal center plane of the docking space, the upper terminal group and the lower terminal group each include a first power terminal with the holding portion arranged close to the horizontal center plane of the docking space and a second power terminal with the holding portion arranged away from the horizontal center plane of the docking space; the contact portion of the first power terminal and the contact portion of the second power terminal in the same terminal group are arranged along the transverse direction of the insulating body, and the two contact portions arranged at the outermost sides in the transverse direction respectively belong to the first power terminal and the second power terminal.

10. The electrical connector of claim 9, wherein: In the same terminal group, the number of the contact portions of the first power terminal is equal to the number of the contact portions of the second power terminal.

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