Electrical connection device

Abstract

The present invention provides an electrical connection device. The electrical connection device includes a socket connector. The socket connector includes a socket housing and a plurality of socket terminals. The socket housing has a bottom surface, a top surface, and a plurality of terminal slots extending from the bottom surface to the top surface, and the slot walls defining each terminal slot include a first side wall portion, a second side wall portion, and a top wall portion that are opposite to each other, and the top wall portion and the second side wall portion are spaced apart so that the terminal slot forms a socket portion that exposes the top surface. Each socket terminal has a fixed section fixed to the socket housing and close to the bottom surface and the first side wall portion, an elastic section extending obliquely upward from the top end of the fixed section and then folding back to extend obliquely upward toward the top wall portion, and a tail section extending from the bottom end of the fixed section toward the second side wall portion. The elastic section has a contact portion formed at the folded portion and a guide surface located below the socket portion.

Description

Technical Field

[0001] The present invention relates to an electrical connection device, and in particular to an electrical connection device with a low height and suitable for high-speed transmission. Background Art

[0002] Currently, electronic information products are becoming thinner and lighter, and they need to meet the requirements of fast transmission speed due to the large amount of information. In electronic information products, electrical connectors usually play an important role in signal transmission. Since the electronic information products need to be thinner and lighter, the height of the electrical connectors must also be reduced to reduce the space occupied in the housing of the electronic information products.

[0003] How to reduce the height of the electrical connector, for example, to less than 5 mm, and meet the electrical requirements of high-speed transmission, such as meeting the 112 GHz transmission speed requirement, still needs to be improved. Summary of the invention

[0004] Therefore, one of the objectives of the present invention is to provide an electrical connection device with a low height and capable of meeting the requirements of high-speed electrical transmission.

[0005] Therefore, in some embodiments, the electrical connection device of the present invention includes a socket connector. The socket connector includes a socket housing and a plurality of socket terminals. The socket housing has a bottom surface, a top surface opposite to the bottom surface, and a plurality of terminal slots extending from the bottom surface to the top surface. The slot wall defining each terminal slot includes a first side wall portion and a second side wall portion opposite to each other and a top wall portion extending from the first side wall portion to the second side wall portion, and the top wall portion and the second side wall portion are spaced apart so that the terminal slot forms a socket portion that exposes the top surface. The plurality of socket terminals are respectively arranged in the plurality of terminal slots, and each socket terminal has a fixed section fixed to the socket housing and close to the bottom surface and the first side wall portion, an elastic section extending obliquely upward from the top end of the fixed section and then folded back to extend obliquely upward to the top wall portion, and a tail section extending from the bottom end of the fixed section toward the second side wall portion. The end of the elastic section is located below the top wall portion and the elastic section has a contact portion formed at the inflection portion and a guide surface between the contact portion and the end of the elastic section and located below the insertion portion.

[0006] In some embodiments, the socket housing further comprises a plurality of positioning walls protruding from the bottom surface respectively corresponding to the plurality of terminal slots, and each positioning wall is arranged along the circumference of the tail section of the corresponding socket terminal.

[0007] In some embodiments, the tail section has a welding surface facing downward and for welding with a solder.

[0008] In some embodiments, the welding surface is a concave arc surface and the solder is a solder ball, so that the welding surface matches the surface shape of the solder ball.

[0009] In some embodiments, the width of the fixed section of each socket terminal is greater than the width of the tail section, and the tail section extends from the middle part of the bottom end of the fixed section. The fixed section has two recessed grooves corresponding to the two sides of the tail section from its bottom.

[0010] In some embodiments, the contact portion is pressed against the second sidewall portion.

[0011] In some embodiments, a plug connector is further included for docking with the socket connector, the plug connector comprising a plug housing and a plurality of plug terminals arranged on the plug housing, the plurality of plug terminals corresponding to the plurality of socket terminals, the socket portion of the socket connector is used for allowing the plurality of plug terminals to be inserted so as to limit the plurality of plug terminals during the insertion process, so that the ends of the plurality of plug terminals push against the guide surfaces of the corresponding socket terminals so that the contact portions thereof move in a direction away from the second side wall portion, thereby causing the contact portions of the plurality of socket terminals to abut against the corresponding plug terminals.

[0012] In some embodiments, the plurality of plug terminals are divided into a plurality of plug terminal groups, each plug terminal group is composed of three plug terminals, wherein two plug terminals are signal terminals and the other plug terminal is a ground terminal, the ground terminal having two conductive portions respectively located on both sides of the plurality of signal terminals and a connecting portion connecting the plurality of conductive portions, the plurality of socket terminals are divided into a plurality of socket terminal groups and respectively correspond to the plurality of plug terminal groups, each socket terminal group is composed of four socket terminals arranged side by side, wherein the two socket terminals located in the middle respectively correspond to the plurality of signal terminals and the two socket terminals located on both sides correspond to the two conductive portions of the ground terminal, the plurality of terminal slots are divided into a plurality of terminal slot groups corresponding to the plurality of socket terminal groups, and the socket housing also has a plurality of slots respectively arranged corresponding to the plurality of terminal slot groups for the connection portions of the ground terminals of the plurality of plug terminal groups to be inserted.

[0013] In some embodiments, the second side wall portion has an inwardly contracted section extending below the corresponding contact portion.

[0014] In some embodiments, the plurality of socket terminals are divided into a plurality of socket terminal groups, each socket terminal group is composed of four socket terminals arranged side by side, the two socket terminals located in the middle serve as signal terminals, and the two socket terminals located on the outside serve as ground terminals, the elastic sections of the plurality of signal terminals are spaced apart by a first distance, the elastic sections of adjacent signal terminals and ground terminals are spaced apart by a second distance, and the first distance is smaller than the second distance, the tail sections of the plurality of signal terminals are spaced apart by a third distance, the tail sections of adjacent signal terminals and ground terminals are spaced apart by a fourth distance, and the third distance is larger than the fourth distance.

[0015] In some embodiments, the plurality of socket terminals are divided into a plurality of socket terminal groups, each socket terminal group is composed of four socket terminals arranged side by side, the two socket terminals located in the middle serve as signal terminals, and the two socket terminals located on the outside serve as ground terminals, and the plurality of terminal slots are divided into a plurality of terminal slot groups, each terminal slot group is composed of four terminal slots arranged side by side to correspond to accommodating one of the socket terminal groups, wherein two terminal slots for respectively accommodating the plurality of signal terminals are spaced apart by a fifth distance, and two terminal slots for accommodating adjacent signal terminals and ground terminals are spaced apart by a sixth distance, and the fifth distance is smaller than the sixth distance.

[0016] Therefore, in some embodiments, the electrical connection device of the present invention includes a socket connector. The socket connector includes a socket housing and a plurality of terminal seats. The socket housing has a bottom surface, a top surface opposite to the bottom surface, and a plurality of terminal slot groups, each terminal slot group includes a receiving slot recessed from the bottom surface and a plurality of terminal slots connected to the receiving slot and extending toward the top surface, the slot wall defining each terminal slot includes a first side wall portion and a second side wall portion opposite to each other and a top wall portion extending from the first side wall portion to the second side wall portion, and the top wall portion and the second side wall portion are spaced apart so that the terminal slot forms a socket portion that exposes the top surface. The plurality of terminal seats are respectively arranged in the plurality of terminal slot groups, each terminal seat includes an insulating seat body and a plurality of socket terminals, and the insulating seat body is arranged in the receiving slot of the corresponding terminal slot group. Each socket terminal is arranged corresponding to one of the terminal slots and has a fixed section fixed to the insulating seat body and close to the first side wall, an elastic section extending obliquely upward from the top of the fixed section and then folding back to extend obliquely upward to the top wall, and a tail section extending from the bottom of the fixed section toward the second side wall. The tail end of the elastic section is located below the top wall and the elastic section has a contact portion formed at the folded position and a guide surface between the contact portion and the tail end of the elastic section and located below the socket portion.

[0017] In some embodiments, the welding surface is a concave arc surface and the solder is a solder ball, so that the welding surface matches the surface shape of the solder ball.

[0018] In some embodiments, the tail section has a welding surface facing downward and for welding with a solder.

[0019] In some embodiments, the width of the fixed section of each socket terminal is greater than the width of the tail section, and the tail section extends from the middle part of the bottom end of the fixed section. The fixed section has two recessed grooves corresponding to the two sides of the tail section from its bottom.

[0020] In some embodiments, the contact portion is pressed against the second sidewall portion.

[0021] In some embodiments, a plug connector is further included for docking with the socket connector, the plug connector comprising a plug housing and a plurality of plug terminals arranged on the plug housing, the plurality of plug terminals corresponding to the plurality of socket terminals, the socket portion of the socket connector is used for allowing the plurality of plug terminals to be inserted so as to limit the plurality of plug terminals during the insertion process, so that the ends of the plurality of plug terminals push against the guide surfaces of the corresponding socket terminals so that the contact portions thereof move in a direction away from the second side wall portion, thereby causing the contact portions of the plurality of socket terminals to abut against the corresponding plug terminals.

[0022] In some embodiments, the plurality of plug terminals are divided into a plurality of plug terminal groups, each plug terminal group is composed of three plug terminals, wherein two plug terminals are signal terminals and the other plug terminal is a ground terminal, the ground terminal having two conductive portions respectively located on both sides of the plurality of signal terminals and a connecting portion connecting the plurality of conductive portions, the plurality of terminal seats respectively correspond to the plurality of plug terminal groups, each terminal seat has a total of four side-by-side socket terminals, wherein the two socket terminals located in the middle respectively correspond to the plurality of signal terminals and the two socket terminals located on both sides correspond to the two conductive portions of the ground terminal, and each terminal slot group also includes a slot for inserting the connecting portion of the corresponding ground terminal.

[0023] In some embodiments, each terminal block is insert molded.

[0024] In some embodiments, each terminal block has four side-by-side socket terminals, the two middle socket terminals serve as signal terminals, and the two outer socket terminals serve as ground terminals, the elastic sections of the plurality of signal terminals are spaced apart by a first distance, the elastic sections of adjacent signal terminals and ground terminals are spaced apart by a second distance, and the first distance is smaller than the second distance, the tail sections of the plurality of signal terminals are spaced apart by a third distance, the tail sections of adjacent signal terminals and ground terminals are spaced apart by a fourth distance, and the third distance is larger than the fourth distance.

[0025] In some embodiments, each terminal seat has four side-by-side socket terminals, the two middle socket terminals serve as signal terminals, and the two outer socket terminals serve as ground terminals, and each terminal slot group has four terminal slots, wherein two terminal slots for respectively accommodating a plurality of the signal terminals are spaced apart by a fifth distance, and two terminal slots for accommodating adjacent signal terminals and ground terminals are spaced apart by a sixth distance, and the fifth distance is smaller than the sixth distance.

[0026] The present invention has at least the following effects: the socket connector as a whole can meet the requirements of miniaturization and low height and can comply with the electrical requirements of high-speed transmission (112 GHz). BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other features and effects of the present invention will be clearly presented in the embodiments with reference to the accompanying drawings, in which:

[0028] Figure 1 is a perspective view of a first embodiment of a socket connector of an electrical connection device of the present invention;

[0029] Figure 2 yes Figure 1 A stereogram from another perspective;

[0030] Figure 3 is an incomplete stereogram of the first embodiment;

[0031] Figure 4 yes Figure 3 A stereogram from another perspective;

[0032] Figure 5 is along Figure 3 The cross-sectional view taken along the VV line;

[0033] Figure 6 is an incomplete exploded perspective view of the first embodiment;

[0034] Figure 7 yes Figure 6 A three-dimensional exploded view from another perspective;

[0035] Figure 8 is an incomplete three-dimensional exploded view illustrating the docking relationship between the socket connector and the plug connector of the first embodiment;

[0036] Fig. 9 is an incomplete three-dimensional view illustrating the docking relationship between the socket terminal and the plug terminal of the first embodiment, wherein the socket housing is removed;

[0037] Fig.10 is an incomplete bottom view of the first embodiment;

[0038] Fig.11 is along Fig.10 The cross-sectional view taken along the XI-XI line;

[0039] Fig.12 is along Fig.10 Sectional view taken along line XII-XII;

[0040] Fig.13 is an incomplete three-dimensional view of a second embodiment of a socket connector of an electrical connection device of the present invention;

[0041] Fig.14 yes Fig.13 A stereogram from another perspective;

[0042] Fig.15 is an incomplete three-dimensional view of a third embodiment of a socket connector of an electrical connection device of the present invention;

[0043] Fig.16 yes Fig.15 3D exploded view of

[0044] Fig.17 yes Fig.16 a stereogram from another perspective; and

[0045] Fig.18 is along Fig.15 Sectional view taken along line XVIII-XVIII.

[0046] The reference numerals are as follows:

[0047] 100 Socket Connector

[0048] 200 Plug Connector

[0049] 1 Socket housing

[0050] 11 Bottom

[0051] 12 Top

[0052] 13 Terminal slot

[0053] 130 Terminal slot set

[0054] 131 first side wall portion

[0055] 132 second side wall portion

[0056] 132a Indentation

[0057] 133 Top wall part

[0058] 134 Socket

[0059] 14 slots

[0060] 15 Positioning wall

[0061] 16 Receptacle

[0062] 2 socket terminals

[0063] 20 Terminal Block

[0064] 21 Fixed segment

[0065] 211 missing slot

[0066] 22 Elastic segment

[0067] 221 Contact Department

[0068] 222 Guide surface

[0069] 23 End

[0070] 231 welding surface

[0071] 24 Insulation seat

[0072] 2S signal terminal

[0073] 2G Ground Terminal

[0074] 3 Plug housing

[0075] 4 Plug terminals

[0076] 41. Connecting part

[0077] 42 Connection

[0078] 4S signal terminal

[0079] 4G Ground Terminal

[0080] A Socket terminal set

[0081] B Plug terminal set

[0082] S Solder (Solder Ball)

[0083] L1 First distance

[0084] L2 Second distance

[0085] L3 Third distance

[0086] L4 Fourth distance

[0087] L5 Fifth distance

[0088] L6 Sixth distance DETAILED DESCRIPTION

[0089] Before the present invention is described in detail, it should be noted that similar elements are denoted by the same reference numerals in the following description.

[0090] See also Figure 1 and Figure 2 A first embodiment of the electrical connection device of the present invention comprises a socket connector 100. The socket connector 100 comprises a socket housing 1 and a plurality of socket terminals 2. In this embodiment, the height of the socket connector 100 is less than 5 mm, and it is a small connector with a low height.

[0091] See also Figures 3 to 5The socket housing 1 has a bottom surface 11, a top surface 12 opposite to the bottom surface 11, and a plurality of terminal slots 13 extending from the bottom surface 11 to the top surface 12. The slot wall defining each terminal slot 13 includes a first side wall portion 131 and a second side wall portion 132 opposite to each other and a top wall portion 133 extending from the first side wall portion 131 to the second side wall portion 132, and the top wall portion 133 is spaced from the second side wall portion 132 so that the terminal slot 13 forms a socket portion 134 that exposes the top surface 12. In this embodiment, the plurality of terminal slots 13 are divided into a plurality of terminal slot groups 130. Specifically, each terminal slot group 130 is composed of four terminal slots 13 arranged side by side. In addition, in this embodiment, the socket housing 1 also has a plurality of slots 14 respectively corresponding to the plurality of terminal slot groups 130 , that is, each terminal slot group 130 also includes a slot 14 , which connects the terminal slots 13 and the socket portions 134 located on the two outer sides.

[0092] See also Figures 5 to 7 , a plurality of socket terminals 2 are respectively disposed in a plurality of terminal slots 13. Each socket terminal 2 comprises a fixed section 21 fixed to the socket housing 1 and close to the bottom surface 11 and the first side wall portion 131, an elastic section 22 extending straightly from the top end of the fixed section 21 to the second side wall portion 132 obliquely upward and then folding back to extend straightly obliquely upward to the top wall portion 133, and a tail section 23 extending from the bottom end of the fixed section 21 to the second side wall portion 132. The tail end of the elastic section 22 is located below the top wall portion 133 and the elastic section 22 has a contact portion 221 formed at the folded portion and located below the socket portion 134 and a guide surface 222 between the contact portion 221 and the tail end of the elastic section 22 and located below the socket portion 134. In the present embodiment, the contact portion 221 is pressed against the second side wall portion 132 and has a preload force. The tail section 23 has a welding surface 231 facing downward and used for welding with a solder S. In the present embodiment, the welding surface 231 is a concave arc surface and the solder S is a solder ball S, so that the welding surface 231 matches the surface shape of the solder ball S, so that the solder ball S can be pre-positioned when the welding surface 231 is welded with the solder ball S and a better contact surface can be provided for convenient welding.

[0093] In the present embodiment, the second side wall portion 132 has a retracted section 132a located below the contact portion 221 and extending to the bottom surface 11. The retracted section 132a is farther away from the corresponding socket terminal 2, so as to reduce the effect of the socket terminal 2 being close to the insulating housing 1 (plastic) and slowing down the conduction speed, thereby improving the signal integrity when transmitting signals. Moreover, in the present embodiment, the plurality of socket terminals 2 are divided into a plurality of socket terminal groups A, and each socket terminal group A is correspondingly arranged in one of the terminal slot groups 130. Each socket terminal group A is composed of four socket terminals 2 arranged side by side, the two socket terminals 2 in the middle are used as signal terminals 2S, and the two socket terminals 2 located on the outside are used as ground terminals 2G. Among them, the elastic sections 22 of the two signal terminals 2S are spaced apart by a first distance L1, and the elastic sections 22 of the adjacent signal terminals 2S and the ground terminal 2G are spaced apart by a second distance L2, and the first distance L1 is smaller than the second distance L2. Furthermore, the tail sections 23 of the two signal terminals 2S are spaced apart by a third distance L3, and the tail sections 23 of the adjacent signal terminals 2S and the ground terminal 2G are spaced apart by a fourth distance L4, and the third distance L3 is greater than the fourth distance L4. In each terminal slot group 130, the two terminal slots 13 located in the middle for accommodating a plurality of the signal terminals 2S are spaced apart by a fifth distance L5, and the two terminal slots 13 for accommodating adjacent signal terminals 2S and the ground terminal 2G are spaced apart by a sixth distance L6, and the fifth distance L5 is less than the sixth distance L6. Through the above configuration, the signal integrity during signal transmission can be further improved.

[0094] In this embodiment, the width of the fixed section 21 of each socket terminal 2 is greater than the width of the tail section 23, and the tail section 23 extends from the middle part of the bottom of the fixed section 21. The fixed section 21 has two recessed grooves 211 that are respectively concave from the bottom to the two sides of the tail section 23. Through the multiple recessed grooves 211, the bending part of the tail section 23 can be closer to the fixed section 21, so that the height of the socket terminal 2 can be reduced, and the elasticity of the tail section 23 can be increased, that is, the elastic adjustment ability of the tail section 23 when subjected to external force can be increased to reduce the risk of breaking. In this embodiment, the height of each socket terminal 2 is less than 2mm.

[0095] See also Figure 8 and Fig. 9 In this embodiment, the electrical connection device further comprises a plug connector 200 for docking with the socket connector 100. For the sake of convenience, only a portion of the plug connector 200 is shown in the figure. The plug connector 200 comprises a plug housing 3 and a plurality of plug terminals 4 disposed on the plug housing 3. The plurality of plug terminals 4 correspond to the plurality of socket terminals 2. Figures 10 to 12The socket portion 134 of the socket connector 100 is used for inserting multiple plug terminals 4 to limit the multiple plug terminals 4 during the insertion process, so that the ends of the multiple plug terminals 4 push the guide surface 222 of the corresponding socket terminal 2 so that the contact portion 221 thereof moves away from the second side wall portion 132, thereby making the contact portions 221 of the multiple socket terminals 2 abut against the corresponding plug terminals 4. The contact portions 221 of the multiple socket terminals 2 have a preload force, and when abutting against the corresponding plug terminals 4, they can generate a large positive force to contact the plug terminals 4, thereby ensuring the stability of the electrical connection.

[0096] See also Figure 8 and Fig. 9 , multiple plug terminals 4 are divided into multiple plug terminal groups B, and only one plug terminal group B is shown in the figure. Each plug terminal group B is composed of three plug terminals 4, two of which are signal terminals 4S and the other plug terminal 4 is a ground terminal 4G. The ground terminal 4G has two conductive parts 41 respectively located on both sides of the multiple signal terminals 4S and a connecting part 42 connecting the multiple conductive parts 41. Multiple socket terminal groups A correspond to multiple plug terminal groups B respectively. In each socket terminal group A, the two signal terminals 2S located in the middle correspond to the multiple signal terminals 4S respectively, and the two ground terminals 2G located on both sides correspond to the two conductive parts 41 of the ground terminal 4G. Please also refer to Figure 6 and Fig.11 The slot 14 of each terminal slot group 130 is used for inserting the connecting portion 42 of the grounding terminal 4G. The grounding terminal 4G of each plug terminal group B is composed of two conductive portions 41 and a connecting portion 42 to form a large-area grounding structure, which can increase the grounding efficiency and reduce interference during high-speed signal transmission.

[0097] See also Fig.13 and Fig.14 The difference between the second embodiment of the electrical connection device of the present invention and the first embodiment is that in the second embodiment, the socket housing 1 further has a plurality of positioning walls 15 protruding from the bottom surface 11 corresponding to the plurality of terminal grooves 13, and each positioning wall 15 is arranged along the circumference of the tail section 23 of the corresponding socket terminal 2 to position the solder ball S, thereby facilitating the setting of the solder ball S and the welding operation.

[0098] See also Figures 15 to 18The difference between the third embodiment of the electrical connection device of the present invention and the first embodiment is that in the third embodiment, each socket terminal group A is arranged on an insulating seat body 24 to form a terminal seat 20, and the fixing section 21 of each socket terminal 2 is fixed to the insulating seat body 24, and each terminal slot group 130 of the socket housing 1 also includes a receiving slot 16 recessed from the bottom surface 11 and connected to the plurality of terminal slots 13, and the receiving slot 16 is used to set the insulating seat body 24. In the third embodiment, each terminal seat 20 is formed by insert molding.

[0099] However, the above is only an embodiment of the present invention, and should not be used to limit the scope of the present invention. All simple equivalent changes and modifications made according to the claims and the description of the present invention are still within the scope of the patent of the present invention.

Claims

1. An electrical connection device, comprising: A socket connector comprising A socket housing has a bottom surface, a top surface opposite to the bottom surface, and a plurality of terminal slots extending from the bottom surface to the top surface, wherein the slot wall defining each terminal slot includes a first side wall portion and a second side wall portion opposite to each other and a top wall portion extending from the first side wall portion to the second side wall portion, and the top wall portion is spaced from the second side wall portion so that the terminal slot forms a socket portion exposed from the top surface, and A plurality of socket terminals are respectively arranged in the plurality of terminal grooves, each socket terminal having a fixed section fixed to the socket housing and close to the bottom surface and the first side wall, an elastic section extending obliquely upward from the top end of the fixed section and then folding back to extend obliquely upward toward the top wall, and a tail section extending from the bottom end of the fixed section toward the second side wall, the tail end of the elastic section is located below the top wall, and the elastic section has a contact portion formed at the folded portion and in contact with the second side wall, and a guide surface between the contact portion and the tail end of the elastic section and located below the socket portion.

2. The electrical connection device according to claim 1, wherein: The socket housing also has a plurality of positioning walls protruding from the bottom surface respectively corresponding to the plurality of terminal slots, and each positioning wall is arranged along the circumference of the tail section of the corresponding socket terminal.

3. The electrical connection device according to claim 1, wherein: The tail section has a welding surface facing downward and used for welding with a solder.

4. The electrical connection device according to claim 3, wherein: The welding surface is a concave arc surface and the solder is a solder ball, so that the welding surface matches the surface shape of the solder ball.

5. The electrical connection device according to claim 1, wherein: The width of the fixed section of each socket terminal is greater than that of the tail section, and the tail section extends from the middle part of the bottom of the fixed section. The fixed section has two recessed grooves which are respectively corresponding to the two sides of the tail section and are recessed inward from the bottom.

6. The electrical connection device according to claim 1, wherein: The contact portion is pressed against the second side wall portion.

7. The electrical connection device as described in claim 1 further includes a plug connector for docking with the socket connector, the plug connector includes a plug housing and a plurality of plug terminals arranged on the plug housing, the plurality of plug terminals correspond to the plurality of socket terminals, and the socket portion of the socket connector is used for the insertion of the plurality of plug terminals to limit the plurality of plug terminals during the insertion process, so that the ends of the plurality of plug terminals push against the guide surfaces of the corresponding socket terminals so that the contact portions thereof move in a direction away from the second side wall portion, thereby causing the contact portions of the plurality of socket terminals to abut against the corresponding plug terminals.

8. The electrical connection device according to claim 7, wherein: The plurality of plug terminals are divided into a plurality of plug terminal groups, each plug terminal group is composed of three plug terminals, wherein two plug terminals are signal terminals and the other plug terminal is a ground terminal, the ground terminal having two conductive portions respectively located on both sides of the plurality of signal terminals and a connecting portion connecting the plurality of conductive portions, the plurality of socket terminals are divided into a plurality of socket terminal groups and respectively correspond to the plurality of plug terminal groups, each socket terminal group is composed of four socket terminals arranged side by side, wherein the two socket terminals located in the middle respectively correspond to the plurality of signal terminals and the two socket terminals located on both sides correspond to the two conductive portions of the ground terminal, the plurality of terminal slots are divided into a plurality of terminal slot groups corresponding to the plurality of socket terminal groups, and the socket housing also has a plurality of slots respectively arranged corresponding to the plurality of terminal slot groups for the connecting portions of the ground terminals of the plurality of plug terminal groups to be inserted.

9. The electrical connection device according to claim 1, wherein: The second side wall portion has an inwardly contracted section extending below the corresponding contact portion.

10. The electrical connection device according to claim 1, wherein: The multiple socket terminals are divided into multiple socket terminal groups, each socket terminal group is composed of four socket terminals arranged side by side, the two socket terminals located in the middle are used as signal terminals, and the two socket terminals located on the outside are used as ground terminals, the elastic sections of the multiple signal terminals are spaced apart by a first distance, the elastic sections of adjacent signal terminals and ground terminals are spaced apart by a second distance, and the first distance is smaller than the second distance, the tail sections of the multiple signal terminals are spaced apart by a third distance, the tail sections of adjacent signal terminals and ground terminals are spaced apart by a fourth distance, and the third distance is larger than the fourth distance.

11. The electrical connection device according to claim 1, wherein: The plurality of socket terminals are divided into a plurality of socket terminal groups, each socket terminal group is composed of four socket terminals arranged side by side, the two socket terminals located in the middle are used as signal terminals, and the two socket terminals located on the outside are used as ground terminals, and the plurality of terminal slots are divided into a plurality of terminal slot groups, each terminal slot group is composed of four terminal slots arranged side by side to correspond to one of the socket terminal groups, wherein two terminal slots for respectively accommodating the plurality of signal terminals are spaced apart by a fifth distance, and two terminal slots for accommodating adjacent signal terminals and ground terminals are spaced apart by a sixth distance, and the fifth distance is smaller than the sixth distance.

12. An electrical connection device, comprising: A socket connector comprising A socket housing has a bottom surface, a top surface opposite to the bottom surface, and a plurality of terminal slot groups, each terminal slot group includes a receiving slot recessed from the bottom surface and a plurality of terminal slots connected to the receiving slot and extending toward the top surface, a slot wall defining each terminal slot includes a first side wall portion and a second side wall portion opposite to each other and a top wall portion extending from the first side wall portion to the second side wall portion, and the top wall portion is spaced from the second side wall portion so that the terminal slot forms a socket portion exposed from the top surface, and A plurality of terminal seats are respectively arranged in a plurality of the terminal slot groups, each terminal seat includes an insulating seat body and a plurality of socket terminals, the insulating seat body is arranged in the accommodating groove of the corresponding terminal slot group, each socket terminal is arranged corresponding to one of the terminal slots and has a fixed section fixed to the insulating seat body and close to the first side wall portion, an elastic section extending obliquely upward from the top end of the fixed section and then folding back to extend obliquely upward toward the top wall portion, and a tail section extending from the bottom end of the fixed section toward the second side wall portion, the end of the elastic section is located below the top wall portion and the elastic section has a contact portion formed at the folded portion and in contact with the second side wall portion, and a guide surface between the contact portion and the end of the elastic section and located below the socket portion.

13. The electrical connection device according to claim 12, wherein: The tail section has a welding surface facing downward and used for welding with a solder.

14. The electrical connection device according to claim 13, wherein: The welding surface is a concave arc surface and the solder is a solder ball, so that the welding surface matches the surface shape of the solder ball.

15. The electrical connection device according to claim 12, wherein: The width of the fixed section of each socket terminal is greater than that of the tail section, and the tail section extends from the middle part of the bottom of the fixed section. The fixed section has two recessed grooves which are respectively corresponding to the two sides of the tail section and are recessed inward from the bottom.

16. The electrical connection device according to claim 12, wherein: The contact portion is pressed against the second side wall portion to have a preload force.

17. The electrical connection device as described in claim 12 further includes a plug connector for docking with the socket connector, the plug connector includes a plug housing and a plurality of plug terminals arranged on the plug housing, the plurality of plug terminals correspond to the plurality of socket terminals, and the socket portion of the socket connector is used for the insertion of the plurality of plug terminals to limit the plurality of plug terminals during the insertion process, so that the ends of the plurality of plug terminals push against the guide surfaces of the corresponding socket terminals so that the contact portions thereof move in a direction away from the second side wall portion, thereby causing the contact portions of the plurality of socket terminals to abut against the corresponding plug terminals.

18. The electrical connection device according to claim 17, wherein: The plurality of plug terminals are divided into a plurality of plug terminal groups, each plug terminal group is composed of three plug terminals, wherein two plug terminals are signal terminals and the other plug terminal is a ground terminal, the ground terminal having two conductive portions respectively located on both sides of the plurality of signal terminals and a connecting portion connecting the plurality of conductive portions, the plurality of terminal seats respectively correspond to the plurality of plug terminal groups, each terminal seat has a total of four side-by-side socket terminals, wherein the two socket terminals located in the middle correspond to the plurality of signal terminals respectively and the two socket terminals located on both sides correspond to the two conductive portions of the ground terminal, and each terminal slot group also includes a slot for inserting the connecting portion of the corresponding ground terminal.

19. The electrical connection device according to claim 12, wherein: Each terminal block is formed by insert molding.

20. The electrical connection device according to claim 12, wherein: Each terminal block has four socket terminals arranged side by side, the two socket terminals in the middle are used as signal terminals, and the two socket terminals on the outside are used as ground terminals, the elastic sections of the plurality of signal terminals are spaced apart by a first distance, the elastic sections of adjacent signal terminals and ground terminals are spaced apart by a second distance, and the first distance is smaller than the second distance, the tail sections of the plurality of signal terminals are spaced apart by a third distance, the tail sections of adjacent signal terminals and ground terminals are spaced apart by a fourth distance, and the third distance is larger than the fourth distance.

21. The electrical connection device according to claim 12, wherein: Each terminal seat has four socket terminals arranged side by side, the two socket terminals in the middle serve as signal terminals, and the two socket terminals on the outside serve as ground terminals. Each terminal slot group has four terminal slots, wherein two terminal slots for respectively accommodating a plurality of the signal terminals are spaced apart by a fifth distance, and two terminal slots for accommodating adjacent signal terminals and ground terminals are spaced apart by a sixth distance, and the fifth distance is smaller than the sixth distance.

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