CN111564716A - Board-to-board connector - Google Patents

Abstract

The invention discloses a board-to-board connector, wherein 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 fixed part fixed on the side wall and a U-shaped contact part extending into the slot from the fixed part; the plug connector includes a plug body and a plug terminal with two side wall parts, and the plug terminal is provided with a plug located on the side wall part The inner wall contact portion of the inner wall and the outer wall contact portion located on the outer wall of the side wall portion, and the U-shaped contact portion simultaneously contacts the inner and outer wall contact portions. The socket terminal is provided with a first welding portion located at the bottom of the U-shaped contact portion, and the plug terminal is provided with a second welding portion located at the bottom of the inner wall contact portion. When the socket connector is mated with the plug connector, the first welding part, the U-shaped contact part, the inner wall contact part and the second welding part form a flow path together, and the maximum current that is conducted is 20A, so that the overall impedance is small. It is beneficial to improve the flow capacity.

Description

Board-to-Board Connectors

technical field

The present invention relates to a board-to-board connector, in particular to a board-to-board connector 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 to overcome the above-mentioned drawbacks.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a board-to-board connector with a shortest flow path, which 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 object, the present invention adopts the following technical solutions: a board-to-board connector, comprising a socket connector and a plug connector that cooperate with each other, the socket connector includes a socket 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 fixing portion and the U-shaped contact portion extending into the slot from one end of the fixing portion. The plug connector includes a plug body and a plug terminal fixed on the plug body, the plug body is provided with two side walls extending in the longitudinal direction and two end walls connecting the two side walls, and the plug terminal is provided with The inner wall contact part located on the inner wall of the side wall part, the outer wall contact part located on the outer wall of the side wall part, and the connecting part connecting the inner wall contact part and the top end of the outer wall contact part, the U-shaped contact part simultaneously contacts the inner wall contact part and the outer wall contact part . 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 plug terminal is provided with a second welding portion located at the bottom of the inner wall contact portion. When the connector is mated, the first welding part, the U-shaped contact part, the inner wall contact part and the second welding part together form a flow path, and the maximum current conducted by the flow path is 20A.

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 protrusion protruding into the slot.

In a preferred embodiment, the end wall shielding sheet further 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 portion is provided with a protruding insertion insert Two convex hulls inside 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 plug terminal is provided with a bottom portion of the inner wall contact portion. When the socket connector is mated with the plug connector, the first welding part, the U-shaped contact part, the inner wall contact part and the second welding part together form the shortest flow path, and the The maximum current conducted by the current path is 20A; it is beneficial to minimize the current path of the board-to-board connector on the basis of effectively controlling the overall size of the board-to-board connector, so as to make the board-to-board connector The overall impedance of the connector is small, which is beneficial to improve the current capacity of the board-to-board connector.

Description of drawings

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

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

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

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

FIG. 5 is a perspective view of a plug connector in the board-to-board connector 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 shown in FIG. 1 when it is not mated.

FIG. 8 is a cross-sectional view of the board-to-board connector 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, the board-to-board connector 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.

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 both the second welding portion 64 and the second welding leg 65 are exposed to 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 that 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 providing multiple 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 preferred embodiments of the present invention, and should not limit the scope of the present invention. It still belongs to the scope covered by the patent of the present invention.

Claims (10)

1. A board-to-board connector, comprising a receptacle connector and a plug connector that cooperate with each other, the receptacle connector comprises a receptacle body and a receptacle terminal fixed on the receptacle body, the receptacle body is provided with a longitudinally extending Two side walls and two end walls connecting the two side walls, the two side walls and the two end walls are enclosed to form a slot, and the socket terminal is provided with a fixing part fixed on the side wall and extending from one end of the fixing part. The U-shaped contact part in the slot, the plug connector 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 are characterized in that: 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 plug terminal is provided with a bottom portion of the inner wall contact portion. When the socket connector is mated with the plug connector, the first welding part, the U-shaped contact part, the inner wall contact part and the second welding part form a flow path together, and the flow The maximum current that the path conducts is 20A. 2 . The board-to-board connector of claim 1 , wherein the side wall portion and the end wall portion of the plug body are surrounded to form a receiving slot, and the socket body includes a central island portion located in the slot. 3 . 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. 3 . The board-to-board connector of claim 2 , wherein the U-shaped contact portion comprises 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 self- One side of the base adjacent to the side wall extends upward and is connected to the second arm of the top end of the fixing part, the first welding part is located on the bottom surface of the base, and when the socket connector is mated with the plug connector, the first arm contacts At the inner wall contact portion, the second arm contacts with the outer wall contact portion. 4 . The board-to-board connector of claim 3 , wherein the first arm has an elastic contact portion protruding into the slot, the second arm has a locking portion located at the upper end, and the The outer wall contact portion has a locking portion located at the upper end. 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 mutually locked. Snap and lock. 5. The board-to-board connector of claim 1, wherein the socket connector comprises end wall protection brackets located at both longitudinal ends of the socket body, the end wall protection brackets being assembled and fixed on the end wall and provided with There are an end wall shielding sheet covering the end wall and a side wall shielding sheet at least partially covering the side wall, the side wall shielding sheet is connected to the lateral ends of the end wall shielding sheet, and the end wall shielding sheet includes a shielding sheet. The end wall shielding part covering the top surface of the end wall and the outer wall shielding part bent from the outer edge of the end wall shielding part and covering the outer wall surface of the end wall, the outer wall shielding part is provided with its lateral ends along the side walls The inner wall surface of the elastic arm extends. 6 . The board-to-board connector of claim 5 , wherein the end wall is provided with a slot extending longitudinally through the end wall and communicating with the slot, and the elastic arm passes through the outer side of the end wall. 7 . The slot extends into the slot, and the elastic arm is provided with a protrusion protruding into the slot. 7 . The board-to-board connector of claim 6 , wherein the end wall shielding piece further comprises 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. 8 . , the inner wall shielding part is provided with two convex hulls that protrude into the slot. 8 . The board-to-board connector of claim 1 , wherein the socket connector comprises 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 covering on the island portion. 9 . The top surface shielding part of the end top surface of the island part, the end surface shielding part bent downward from the longitudinal side of the top surface shielding part and covering the end surface of the island part, and the end surface shielding part from the bottom of the end surface shielding part toward the end wall The extended embedded portion is integrally formed on the bottom of the socket body and exposed on the bottom surface of the socket body. 9 . The board-to-board connector of claim 1 , wherein the plug connector comprises metal reinforcements located at both longitudinal ends of the plug body, and the metal reinforcements have a pair of independent and laterally arranged metal reinforcements. 10 . Components on the end wall, each of the components includes an end wall shielding sheet at least partially covering the end wall, a side wall shielding sheet at least partially covering the side wall, and connecting the end wall shielding sheet with the end wall shielding sheet. The side wall portion shields the bent portion of the sheet. 10 . The board-to-board connector of claim 9 , wherein the end wall shielding piece comprises an end wall outer wall shielding portion covering the end wall outer wall and a shielding portion from the end wall outer wall shielding portion. 11 . The top is bent inward and covers the top surface of the end wall and the inner wall shielding portion of the end wall portion. The top of the outer wall shielding portion is bent inward and covers the top surface of the side wall portion and the inner wall shielding portion of the side wall portion of the inner wall. The bent 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.

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