CN212230649U - Board-to-Board Connector Assemblies - Google Patents

Abstract

The utility model discloses a board-to-board connector assembly. The socket connector comprises a socket body and a socket terminal. The socket body is provided with two side walls, two end walls connecting the two side walls, and a slot surrounded by the side walls and the end walls. , the socket terminal is provided with a fixing portion fixed on the side wall, a U-shaped contact portion extending into the slot from the fixing portion, and a first welding pin extending from the fixing portion; the plug connector includes a plug body with two side wall portions and a plug The terminal, the plug terminal is provided with an inner wall contact part located on the inner wall of the side wall part and an outer wall contact part located on the outer wall of the side wall part, and the U-shaped contact part contacts the inner and outer wall contact parts at the same time. The socket terminal is provided with a first welding portion at the bottom of the U-shaped contact portion, and the plug terminal is provided with a second welding portion at the bottom of the inner wall contact portion and a second welding leg extending from the bottom of the outer wall contact portion. When the socket connector is matched with the plug connector, the shortest flow path is formed by the two welding parts and the two welding feet, so that the overall impedance is small, which is beneficial to improve the flow capacity.

Description

Board-to-Board Connector Assemblies

technical field

The utility model relates to a board-to-board connector assembly, in particular to a board-to-board connector assembly with good current flow capability.

Background technique

Board to Board Connector (BTB for short) is a kind of connector often used in electronic devices (such as mobile phones, tablet computers, etc.) Mechanical and electrical interconnection between groups, touch modules, camera modules, etc.). At present, with the development of fast charging technology, mobile phone users have put forward higher requirements for the battery life of the mobile phone and shortening the charging time of the mobile phone battery. In order to realize fast charging of mobile phone batteries, devices on the fast charging path, such as batteries, board-to-board connectors, printed circuit boards (PCBs) and chips, are required to be able to carry large currents. . For the board-to-board connector, in order to improve its fast charging capability, it is necessary to reduce the transmission impedance of the board-to-board connector. In the case that the terminal copper material of the existing board-to-board connector has used the material with the highest conductivity at present, increasing the contact area between the terminals is a common design scheme to reduce impedance. However, by increasing the contact area between the terminals, the As a result, the area size of the board-to-board connector becomes larger, so that it occupies a larger space inside the mobile phone, which is contrary to the development trend of reducing the size of the internal components of the mobile phone to increase the setting of the functional modules of the mobile phone. Therefore, how to improve the current flow capacity on the basis of reducing the size of the board-to-board connector has become a technical problem to be solved urgently by those skilled in the art.

Therefore, it is desirable to propose a new board-to-board connector assembly to overcome the above-mentioned drawbacks.

Utility model content

The purpose of the present invention is to provide a board-to-board connector assembly with a shortest flow path, the shortest flow path makes the overall impedance of the board-to-board connector smaller, which is beneficial to improve the flow capacity.

In order to achieve the above purpose, the present invention adopts the following technical solutions: a board-to-board connector assembly, comprising a socket connector and a plug connector that cooperate with each other, the socket connector is mounted on a first circuit board and includes a socket A body and a socket terminal fixed on the socket body, the socket body is provided with two side walls extending longitudinally and two end walls connecting the two side walls, the two side walls and the two end walls are surrounded to form a slot, so The socket terminal is provided with a fixing portion fixed on the side wall, a U-shaped contact portion extending into the slot from one end of the fixing portion, and a first welding leg extending out of the socket body from the other end of the fixing portion. The plug connector is mounted on a second circuit board and includes a plug body and a plug terminal fixed on the plug body. The plug body is provided with two side walls extending longitudinally and two ends connecting the two side walls The wall part, the plug terminal is provided with an inner wall contact part located on the inner wall of the side wall part, an outer wall contact part located on the outer wall of the side wall part, and a connecting part connecting the inner wall contact part and the top end of the outer wall contact part, and the U-shaped contact parts are simultaneously contacted The inner wall contact portion and the outer wall contact portion. The socket terminal is provided with a first welding part located at the bottom of the U-shaped contact part and exposed to the bottom surface of the socket body, the first welding part and the first welding leg are welded on the first circuit board, and the plug terminal is provided with A second welding portion located at the bottom of the inner wall contact portion and a second welding leg extending from the bottom of the outer wall contact portion of the plug body, the second welding portion and the second welding leg are welded on the second circuit board.

In a preferred embodiment, several flow paths are formed between the first welding part and the first welding leg of the socket terminal and the second welding part and the second welding leg of the plug terminal, wherein the first welding part and the second welding leg of the plug terminal form several flow paths. The flow path formed between a welding portion and the second welding portion is smaller than the flow path formed between the first welding leg and the second welding leg.

In a preferred embodiment, the side wall portion and the end wall portion of the plug body are surrounded to form a receiving groove, and the socket body includes a central island portion located in the socket. When the socket connector is mated with the plug connector In this case, the island portion is accommodated in the accommodating groove of the plug body, and the side wall portion and the end wall portion of the plug body are accommodated in the slot.

In a preferred embodiment, the U-shaped contact portion includes a base portion exposed on the bottom surface of the socket body, a first arm extending upward from a side of the base portion adjacent to the island portion, and a side extending upward from the base portion adjacent to the side wall and connected to The second arm at the top of the fixing part, the first welding part is located on the bottom surface of the base, when the socket connector is mated with the plug connector, the first arm contacts the inner wall contact part, and the second arm contacts the inner wall contact part. outer wall contact.

In a preferred embodiment, the first arm has an elastic contact portion protruding into the slot, the second arm has a locking portion at the upper end, and the outer wall contact portion has a locking portion at the upper end, when all the When the socket connector is mated with the plug connector, the elastic contact portion elastically abuts against the contact surface of the inner wall contact portion, and the locking portion and the locking portion are locked by mutual locking.

In a preferred embodiment, the socket connector includes end wall protection brackets located at both longitudinal ends of the socket body, the end wall protection brackets are assembled and fixed on the end wall and are provided with end wall shielding sheets covering the end wall and A side wall shielding piece covering at least part of the sidewall, the side wall shielding piece is connected to the lateral ends of the end wall shielding piece, the end wall shielding piece includes an end wall shielding portion covering the top surface of the end wall and a The outer wall shielding portion is bent from the outer side of the end wall shielding portion and covers the outer wall surface of the end wall. The outer wall shielding portion is provided with elastic arms whose lateral ends extend along the inner wall surface of the side wall.

In a preferred embodiment, the end wall is provided with a slot that penetrates the end wall in the longitudinal direction and communicates with the slot, the elastic arm passes through the slot from the outer side of the end wall and extends into the slot, and the elastic arm extends into the slot. The arm is provided with a protruding portion protruding into the slot, the end wall shielding piece also includes an inner wall shielding portion bent from the inner side of the end wall shielding portion and covering the inner wall surface of the end wall, the inner wall shielding The part is provided with two convex hulls that protrude into the slot.

In a preferred embodiment, the socket connector includes an island portion protection bracket integrally injection-molded at the end of the island portion, and the island portion protection bracket is provided with a top surface shielding portion covering the top surface of the end portion of the island portion , The end shielding portion that is bent downward from the longitudinal side of the top shielding portion and covers the end face of the island portion and the embedded portion extending from the bottom of the end shielding portion toward the end wall, the embedded portion is integrally formed in The bottom of the socket body is exposed on the bottom surface of the socket body.

In a preferred embodiment, the plug connector includes metal reinforcements located at both longitudinal ends of the plug body, the metal reinforcements having a pair of members independent of each other and laterally arranged on the end wall, each of the members It includes an end wall shielding piece at least partially covering the end wall, a sidewall shielding piece at least partially covering the side wall, and a bending portion connecting the end wall shielding piece and the sidewall shielding piece.

In a preferred embodiment, the end wall shielding sheet includes an end wall outer wall shielding portion covering the end wall outer wall and an end wall outer wall shielding portion that is bent inward from the top of the end wall outer wall shielding portion and covers the end wall portion The top surface and the inner wall shielding portion of the end wall portion of the inner wall, the side wall portion shielding sheet includes a side wall portion outer wall shielding portion covering the outer wall of the side wall portion and a top portion that is bent inward from the top of the outer wall shielding portion of the side wall portion and covers The inner wall shielding portion of the side wall portion covers the top surface and the inner wall of the side wall portion, and the bending portion is connected to the outer wall shielding portion of the end wall portion and the outer wall shielding portion of the side wall portion.

Compared with the prior art, the present invention has the following beneficial effects: the socket terminal is provided with a first welding portion located at the bottom of the U-shaped contact portion and exposed to the bottom surface of the socket body, and the first welding portion is connected to the first welding portion. The feet are welded on the first circuit board; the plug terminal is provided with a second welding portion located at the bottom of the inner wall contact portion and a second welding leg extending out of the plug body from the bottom of the outer wall contact portion, and the second welding portion is connected to the first welding portion. The two solder pins are soldered on the second circuit board. When the socket connector is mated with the plug connector, the socket terminal and the plug terminal form several flow paths through two welding parts and two welding feet, and the first welding part, the U-shaped contact part, The shortest flow path is formed between the inner wall contact part and the second welding part; it is beneficial to make the board-to-board connector the shortest flow path on the basis of effectively controlling the overall size of the board-to-board connector Therefore, the overall impedance of the board-to-board connector is reduced, which is beneficial to improve the current capacity of the board-to-board connector.

Description of drawings

FIG. 1 is a schematic perspective view of a board-to-board connector assembly in a preferred embodiment of the present invention.

FIG. 2 is a schematic perspective view of the board-to-board connector assembly shown in FIG. 1 when it is not mated.

FIG. 3 is a schematic perspective view of the receptacle connector in the board-to-board connector assembly shown in FIG. 2 .

FIG. 4 is an exploded schematic view of the receptacle connector shown in FIG. 3 .

FIG. 5 is a schematic perspective view of a plug connector in the board-to-board connector assembly shown in FIG. 2 .

FIG. 6 is an exploded schematic view of the plug connector shown in FIG. 5 .

FIG. 7 is a cross-sectional view of the board-to-board connector assembly shown in FIG. 1 when it is not mated.

FIG. 8 is a cross-sectional view of the board-to-board connector assembly shown in FIG. 1 when mated.

Detailed ways

Referring to FIGS. 1 to 6 , a preferred embodiment of the present invention discloses a board-to-board connector assembly, the board-to-board connector assembly includes a receptacle connector 100 and a plug connector 200 that cooperate with each other. The socket connector 100 is mounted on the first circuit board 300, and the plug connector 200 is mounted on the second circuit board 400. When the socket connector 100 is mated with the plug connector 200, the first The circuit board 300 and the second circuit board 400 are connected through the above board-to-board connector assembly.

Referring to FIGS. 2 to 4 , the socket connector 100 includes a socket body 10 extending longitudinally, socket terminals 20 fixed on the socket body 10 , and protective brackets located at both longitudinal ends of the socket body 10 . The socket body 10 is provided with a central island portion 11 extending along the longitudinal direction, two side walls 12 located on two lateral sides of the island portion 11 , and two end walls 13 connected to the two side walls 12 . The island portion 11 , the two side walls 12 and the two end walls 13 together define a slot 14 , and the slot 14 can be inserted into the plug connector 200 .

The socket terminal 20 is provided with a fixing portion 21 fixed on the side wall 11 , a U-shaped contact portion 22 extending from one end of the fixing portion 21 into the slot 14 , and a U-shaped contact portion 22 extending from the other end of the fixing portion 21 out of the socket body 10 . The first soldering pin 23 and the first soldering portion 24 located at the bottom of the U-shaped contact portion 22 and exposed to the bottom surface of the socket body 10 . The U-shaped contact portion 22 includes a base portion 25 exposed on the bottom surface of the socket body 10 , a first arm 26 extending upward from a side of the base portion 25 adjacent to the island portion 11 , and extending upward from a side of the base portion 25 adjacent to the side wall 12 and connected On the second arm 27 at the top of the fixing portion 21 , the first welding portion 24 is located on the bottom surface of the base portion 25 . The first arm 26 has an elastic contact portion 261 protruding into the slot 14 , and the second arm 27 has a locking portion 271 located at the upper end and protruding inwardly. The first soldering portion 24 and the first soldering pin 23 are both exposed on the bottom surface of the socket body 10 and located in the same plane, so as to be soldered on the first circuit board 300 .

In this embodiment, the socket terminal 20 includes two pairs of signal terminals located in the center in the longitudinal direction and two pairs of power terminals located on both sides of the signal terminal in the longitudinal direction. The power terminals and the signal terminals have the same structure in the transverse section. , and the difference between the two is that the longitudinal length of the power terminal is much larger than the longitudinal length of the signal terminal, so as to ensure that the power terminal can conduct a large current. Meanwhile, the thickness of the power terminal of the socket terminal 20 is 0.1 mm, thereby reducing the impedance of the power terminal.

The protection bracket includes an island protection bracket 30 integrally injection-molded on the end of the island 11 and an end wall protection bracket 40 assembled and fixed on the end wall 13 to enhance the overall strength of the socket connector 100 . The island portion protection bracket 30 is integrally injection-molded at the end of the island portion 11 , and is provided with a top surface shielding portion 31 covering the top surface of the end portion of the island portion 11 and an end surface covering the end surface of the island portion 11 . The shielding portion 32 is formed by bending downward from the longitudinal side of the top shielding portion 31 . The island portion protection bracket 30 is integrally injection-molded on the island portion 11 , thereby enhancing the strength of the island portion 11 of the socket body 10 and avoiding damage to the island portion 11 when the socket connector 100 is inserted and pulled out. The island protection bracket 30 is further provided with an embedded portion 34 extending from the bottom of the end shielding portion 32 toward the end wall 13 .

The end wall protection bracket 40 is assembled and fixed on the end wall 13 of the socket body 10 from top to bottom, and is provided with an end wall shielding piece 41 covering the end wall 13 and a side wall shielding at least partially covering the side wall 12 Pieces 42 , the side wall shielding pieces 42 are connected to the lateral ends of the end wall shielding pieces 41 . The end wall shielding sheet 41 is provided with an end wall shielding portion 411 that covers the top surface of the end wall 13 , and an outer wall shielding portion 412 that is bent from the outer edge of the end wall shielding portion 411 and covers the outer wall surface of the end wall 13 . and the inner wall shielding portion 413 bent from the inner side of the end wall shielding portion 411 and covering the inner wall surface of the end wall 13, the outer wall shielding portion 412 is provided with extending from its lateral ends along the inner wall surface of the side wall 12. Spring arm 414 . The elastic arm 414 is provided with a protruding portion 415 protruding into the slot 14 , and the inner wall shielding portion 413 is provided with two protruding protrusions 416 protruding into the slot 14 for the socket connector 100 Ensure the passage of large current when plugging.

The end wall 13 is provided with a slot 17 extending longitudinally through the end wall 13 and communicating with the slot 14 . The elastic arm 414 passes through the slot 17 from the outer side of the end wall 13 and extends into the slot 14 . The elastic arm 414 extends longitudinally in the area of the side wall 12 , and a gap is formed between the elastic arm 414 and the inner wall surface of the side wall 12 . The side wall 12 of the socket body 10 is provided with an escape groove 15 corresponding to the elastic arm 414 . The escape groove 15 is recessed from the inner wall surface of the side wall 12 , so that the elastic arm 414 has sufficient capacity when elastically deformed. sports space.

The side wall shielding pieces 42 of the end wall protection bracket 40 are provided with side wall shielding portions 421 extending longitudinally from both ends of the end wall shielding portion 411 . top. The side wall shielding portion 421 at least partially covers the top of the elastic arm 414 , so as to protect the elastic arm 414 and limit the position of the elastic arm 413 . The side wall shielding piece 42 is further provided with a soldering pin 422 bent downward from the outer edge of the sidewall shielding portion 421 , and the soldering pin 422 can be fixedly installed on the first socket electrically connected to the socket connector 100 . on a circuit board 300 .

The welding legs 422 are fastened to the outer wall surface of the side wall 12 for fixing the end wall protection bracket 40 to the socket body 10 . The socket body 10 is provided with a locking groove 16 located on the outer wall of the side wall 12 , the welding pin 422 is received in the locking groove 16 and has a barb engaged with the wall of the locking groove 16 to strengthen the end The wall protection bracket 40 is secured to the socket body 10 for stability.

Referring to FIGS. 5 to 6 , the plug connector 200 includes a plug body 50 extending longitudinally, terminals 60 fixed on the plug body 50 , and metal reinforcements located at both longitudinal ends of the plug body 50 . The plug body 50 is provided with two side wall portions 51 extending in the longitudinal direction and two end wall portions 52 connected to the two side wall portions 51 . The two side wall portions 51 and the two end wall portions 52 together define a receiving groove 53 , and the receiving groove 53 can be inserted into the island portion 11 of the socket connector 100 .

The plug terminal 60 is fixed on the side wall portion 51 and has an inner wall contact portion 61 located on the inner wall of the side wall portion 51 , an outer wall contact portion 62 located on the outer wall of the side wall portion 51 , and connecting the inner wall contact portion 61 and the top of the outer wall contact portion 62 . The connecting portion 63 , the second welding portion 64 located at the bottom of the inner wall contact portion 61 , and the second welding leg 65 extending out of the plug body 50 from the bottom of the outer wall contact portion 62 . The inner wall contact portion 61 has a smooth contact surface, the outer wall contact portion 62 has a locking portion 66 located at the upper end and protruding outward, and the second welding portion 64 and the second welding leg 65 are both exposed on the plug body 10 The bottom surface is located in the same plane, so as to be soldered on the second circuit board 400 .

The metal reinforcements are integrally injection-molded on both longitudinal ends of the plug body 50 to enhance the overall strength of the plug connector 200 . The metal reinforcement has a pair of members 70 which are independent from each other and are laterally arranged on the end wall 52 , each of the members 70 is wrapped on the outside of the plug body 50 , while enhancing the strength of the plug body 50 . In addition, damage to the plug body 50 when the plug connector 200 is inserted and withdrawn is avoided. The member 70 includes an end wall shielding piece 71 at least partially covering the end wall portion 52 , a side wall shielding piece 72 at least partially covering the side wall portion 51 , and connecting the end wall shielding piece 71 and the side wall portion. The bent portion 73 of the shielding sheet 72 .

The end wall portion shielding sheet 71 includes an end wall portion outer wall shield portion 711 that covers the outer wall of the end wall portion 52 and is bent inward from the top of the end wall portion outer wall shield portion 711 and covers the top surface of the end wall portion 52 and the inner wall shielding portion 712 of the end wall portion of the inner wall. The inner wall shielding portion 722 of the side wall portion is folded and covered on the top surface of the side wall portion 51 and the inner wall. The bent portion 73 is connected between the outer wall shielding portion 711 of the end wall portion and the outer wall shielding portion 721 of the side wall portion. Meanwhile, the bottom of the outer wall shielding portion 721 of the side wall portion can be fixedly mounted on the second circuit board 400 electrically connected to the plug connector 200 .

In the present embodiment, the plug terminal 60 includes two pairs of signal terminals located in the center in the longitudinal direction and two pairs of power terminals located on both sides of the signal terminal in the longitudinal direction. The side wall shielding pieces 72 of the member 70 constitute the The power terminal of the plug terminal 60 is used for mating with the power terminal of the socket terminal 20 . The power terminal of the plug terminal 60 and the signal terminal have the same structure in the transverse section, but the difference between the two is that the longitudinal length of the power terminal is much larger than the longitudinal length of the signal terminal and is connected to the end wall. The shielding sheet 71 ensures that it can conduct a large current. Meanwhile, the thickness of the power terminal of the plug terminal 60 (ie, the side wall shielding sheet 72 ) is 0.1 mm, thereby reducing the impedance of the power terminal.

7 and 8 , when the socket connector 100 is mated with the plug connector 200 , the island portion 11 of the socket body 10 is accommodated in the accommodating groove 53 of the plug body 50 , and the The side wall portion 51 and the end wall portion 52 are accommodated in the slot 14 of the socket body 10 . The end wall protection bracket 40 abuts against the member 70 of the metal reinforcement, wherein the protruding portion 415 of an elastic arm 414 of the end wall protection bracket 40 abuts against the end wall outer wall shielding portion 711 of the member 70 , And a convex hull 416 abuts against the outer wall shielding portion 721 of the side wall portion of the member 70 , so that both contact points can form backflow to form multi-point contact, reduce impedance, and increase flow capacity.

The U-shaped contact portion 22 of the socket terminal 20 contacts the inner wall contact portion 61 and the outer wall contact portion 62 of the plug terminal 60 at the same time, wherein the first arm 26 of the U-shaped contact portion 22 contacts the inner wall contact portion 61 and The second arm 27 is in contact with the outer wall contact portion 62 , more specifically, the elastic contact portion 261 of the first arm 26 elastically abuts against the contact surface of the inner wall contact portion 61 , and the locking portion 271 of the second arm 27 is in elastic contact with the contact surface of the inner wall contact portion 61 . The locking portion 66 of the outer wall contact portion 62 is locked by engaging with each other. Thereby, several flow paths (ie, current flow paths) are formed between the first welding portion 24 and the first welding leg 23 of the socket terminal 20 and the second welding portion 64 and the second welding leg 65 of the plug terminal 60 . flow path). Compared with the conventional technology, which only forms a single flow path between the first solder leg and the second solder leg, the present invention increases the flow capacity between the terminals by setting a plurality of flow paths.

The flow path formed between the first welding part 24 and the second welding part 64 is smaller than the flow path formed between the first welding leg 23 and the second welding leg 65 , and the first welding The flow path jointly formed by the welding portion 24 , the U-shaped contact portion 22 , the inner wall contact portion 61 and the second welding portion 64 is shortened, thereby realizing fast charging of the terminal device. In this embodiment, the maximum current that conducts through the current paths between the power terminals is 20A.

To sum up, the above are only the preferred embodiments of the present utility model, and should not limit the scope of the present utility model, that is, any simple equivalent changes and modifications made according to the claims of the present utility model and the contents of the description , should still belong to the scope covered by this utility model patent.

Claims (10)

1. A board-to-board connector assembly comprises a socket connector and a plug connector which are matched with each other, wherein the socket connector is installed on a first circuit board and comprises a socket body and socket terminals fixedly held on the socket body, the socket body is provided with two side walls extending along the longitudinal direction and two end walls connected with the two side walls, the two side walls and the two end walls are enclosed to form slots, the socket terminals are provided with fixing portions fixedly held on the side walls, U-shaped contact portions extending into the slots from one ends of the fixing portions and first welding pins extending out of the socket body from the other ends of the fixing portions, the plug connector is installed on a second circuit board and comprises a plug body and plug terminals fixedly held on the plug body, the plug body is provided with two side wall portions extending along the longitudinal direction and two end wall portions connected with the two side wall portions, and is provided with inner wall contact portions positioned on the inner walls of, The U-shaped contact part simultaneously contacts the inner wall contact part and the outer wall contact part; the method is characterized in that: the socket terminal is provided with a first welding part which is positioned at the bottom of the U-shaped contact part and exposed on the bottom surface of the socket body, the first welding part and the first welding leg are welded on the first circuit board, the plug terminal is provided with a second welding part which is positioned at the bottom of the inner wall contact part and a second welding leg which extends out of the plug body from the bottom of the outer wall contact part, and the second welding part and the second welding leg are welded on the second circuit board.

2. The board-to-board connector assembly of claim 1, wherein: a plurality of through-flow paths are formed between the first welding part and the first welding leg of the socket terminal and the second welding part and the second welding leg of the plug terminal, wherein the through-flow path formed between the first welding part and the second welding part is smaller than the through-flow path formed between the first welding leg and the second welding leg.

3. The board-to-board connector assembly of claim 1, wherein: the side wall portion and the end wall portion of the plug body are arranged in a surrounding mode to form an accommodating groove, the socket body comprises a central island portion located in the slot, when the socket connector is matched with the plug connector, the island portion is accommodated in the accommodating groove of the plug body, and the side wall portion and the end wall portion of the plug body are accommodated in the slot.

4. The board-to-board connector assembly of claim 3, wherein: the U-shaped contact portion comprises a base portion exposed on the bottom surface of the socket body, a first arm extending upwards from one side of the base portion adjacent to the island portion and a second arm extending upwards from one side of the base portion adjacent to the side wall and connected to the top end of the fixing portion, the first welding portion is located on the bottom surface of the base portion, when the socket connector is matched with the plug connector, the first arm is in contact with the inner wall contact portion, and the second arm is in contact with the outer wall contact portion.

5. The board-to-board connector assembly of claim 4, wherein: the first arm is provided with an elastic contact part protruding into the slot, the second arm is provided with a locking part positioned at the upper end, the outer wall contact part is provided with a locking part positioned at the upper end, when the socket connector is matched with the plug connector, the elastic contact part is elastically abutted against the contact surface of the inner wall contact part, and the locking part are mutually buckled and locked.

6. The board-to-board connector assembly of claim 1, wherein: the socket connector comprises end wall protection supports positioned at the two longitudinal ends of a socket body, the end wall protection supports are assembled and fixed on the end walls and are provided with end wall shielding sheets covering the end walls and side wall shielding sheets at least partially covering the side walls, the side wall shielding sheets are connected to the two transverse ends of the end wall shielding sheets, each end wall shielding sheet comprises an end wall shielding part covering the top surfaces of the end walls and an outer wall shielding part bent from the outer side edge of the end wall shielding part and covering the outer wall surface of the end wall, and the outer wall shielding part is provided with elastic arms extending from the two transverse ends of the outer wall along the inner wall surface of the side wall.

7. The board-to-board connector assembly of claim 6, wherein: the end wall is provided with a slot which longitudinally penetrates through the end wall and is communicated with the slot, the elastic arm penetrates through the slot from the outer side surface of the end wall and extends into the slot, the elastic arm is provided with a protruding part which protrudes into the slot, the end wall shielding piece further comprises an inner wall shielding part which is bent from the inner side edge of the end wall shielding part and covers the inner wall surface of the end wall, and the inner wall shielding part is provided with two convex hulls which protrude into the slot.

8. The board-to-board connector assembly of claim 1, wherein: the socket connector comprises an island portion protection support integrally injection-molded at the end portion of the island portion, the island portion protection support is provided with a top surface shielding portion covering the top surface of the end portion of the island portion, an end surface shielding portion bending downwards from one longitudinal side of the top surface shielding portion and covering the end surface of the end portion of the island portion, and an embedding portion extending from the bottom of the end surface shielding portion towards the end wall, and the embedding portion is integrally molded at the bottom of the socket body and is exposed out of the bottom surface of the socket body.

9. The board-to-board connector assembly of claim 1, wherein: the plug connector comprises metal reinforcing parts positioned at two longitudinal ends of a plug body, each metal reinforcing part is provided with a pair of components which are independent from each other and are transversely arranged on the end wall part, and each component comprises an end wall part shielding sheet at least partially covering the end wall part, a side wall part shielding sheet at least partially covering the side wall part and a bending part connecting the end wall part shielding sheet and the side wall part shielding sheet.

10. The board-to-board connector assembly of claim 9, wherein: the end wall part shielding piece comprises an end wall part outer wall shielding part and an end wall part inner wall shielding part, the end wall part outer wall shielding part covers the end wall part outer wall, the end wall part inner wall shielding part is bent inwards from the top of the end wall part outer wall shielding part and covers the top surface of the end wall part and the inner wall, the side wall part shielding piece comprises a side wall part outer wall shielding part and a side wall part inner wall shielding part, the side wall part outer wall shielding part covers the side wall part outer wall, the side wall part inner wall shielding part is bent inwards from the top of the side wall part outer wall shielding part and covers the top surface of the side wall.

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