Board-to-Board Connectors

Abstract

The present invention discloses a board-to-board connector, wherein the socket connector includes 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 to the side wall and a U-shaped contact portion extending from the fixing portion into the slot; the plug connector includes a plug body with two side wall portions and a plug terminal, the plug terminal is provided with an inner wall contact portion located on the inner wall of the side wall portion and an outer wall contact portion located on the outer wall of the side wall portion, and the U-shaped contact portion contacts the inner and outer wall contact portions simultaneously. 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 matched with the plug connector, the first welding portion, the U-shaped contact portion, the inner wall contact portion and the second welding portion jointly form a flow path, and the maximum current conducted by the first welding portion, the U-shaped contact portion, the inner wall contact portion and the second welding portion are 20A, so that the overall impedance is small, which is conducive to improving the flow capacity.

Description

Technical Field

[0001] The invention relates to a board-to-board connector, and in particular to a board-to-board connector with good current flow capacity. Background Art

[0002] A board-to-board connector (BTB) is a connector commonly used in electronic devices (such as mobile phones, tablet computers, etc.). Its function is to achieve mechanical and electrical interconnection between the motherboard of the electronic device and various modules (such as display modules, 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 mobile phones and shortening the charging time of mobile phone batteries. In order to achieve fast charging of mobile phone batteries, it is required that the devices on the fast charging path, such as batteries, board-to-board connectors, printed circuit boards (PCBs) and chips, can carry large current transmission. For board-to-board connectors, in order to improve their own fast charging capabilities, it is necessary to reduce the transmission impedance of the board-to-board connector. In the case that the copper material of the terminals of the existing board-to-board connectors has been made of the material with the highest conductivity, increasing the contact area between the terminals is a common design solution to reduce impedance. However, increasing the contact area between the terminals will cause the area size of the board-to-board connector to become larger, so that it occupies a larger space inside the mobile phone, which is contrary to the development trend of reducing the size of internal components of the mobile phone to increase the setting of mobile phone functional modules. Therefore, how to improve the current flow capacity of the board-to-board connector while reducing its size has become a technical problem that technicians in this field need to solve urgently.

[0003] Therefore, it is hoped to provide a new board-to-board connector to overcome the above defects. Summary of the invention

[0004] An object of the present invention is to provide a board-to-board connector with a shortest current path, wherein the shortest current path reduces the overall impedance of the board-to-board connector and is beneficial to improving the current capacity.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a board-to-board connector, comprising a socket connector and a plug connector that cooperate with each other, the socket connector comprising a socket body and a socket terminal fixed on the socket body, the socket body is provided with two side walls extending in the longitudinal direction and two end walls connecting the two side walls, the two side walls and the two end walls are surrounded to form a slot, the socket terminal is provided with a fixing portion fixed on the side wall and a U-shaped contact portion extending from one end of the fixing portion into the slot. The plug connector comprises 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, the plug terminal is provided with an inner wall contact portion located on the inner wall of the side wall portion, an outer wall contact portion located on the outer wall of the side wall portion, and a connecting portion connecting the inner wall contact portion and the top of the outer wall contact portion, the U-shaped contact portion contacts the inner wall contact portion and the outer wall contact portion at the same time. 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 socket connector is mated with the plug connector, the first welding portion, the U-shaped contact portion, the inner wall contact portion and the second welding portion jointly form a current path, and the maximum current conducted by the current path is 20A.

[0006] In a preferred embodiment, the side wall portion and the end wall portion of the plug body are arranged to form a receiving groove, and the socket body includes a central island portion located in the slot. When the socket connector is mated with the plug connector, the island portion is received in the receiving groove of the plug body, and the side wall portion and the end wall portion of the plug body are received in the slot.

[0007] In a preferred embodiment, the U-shaped contact portion includes a base exposed to the bottom surface of the socket body, a first arm extending upward from a side of the base adjacent to the island portion, and a second arm extending upward from a side of the base adjacent to the side wall and connected to the top of the fixed portion, and the first welding portion 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 portion, and the second arm contacts the outer wall contact portion.

[0008] In a preferred embodiment, 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 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 locked with each other.

[0009] 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 an end wall shielding piece covering the end wall and a side wall shielding piece at least partially covering the side wall, 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 an outer wall shielding portion bent from the outer edge of the end wall shielding portion and covering the outer wall surface of the end wall, the outer wall shielding portion is provided with elastic arms extending along the inner wall surface of the side wall at its lateral ends.

[0010] In a preferred embodiment, the end wall is provided with a narrow slot which penetrates the end wall longitudinally and communicates with the slot, the elastic arm passes through the narrow slot from the outer side of the end wall and extends into the slot, and the elastic arm is provided with a protrusion which protrudes into the slot.

[0011] In a preferred embodiment, the end wall shielding sheet further comprises an inner wall shielding portion bent from the inner side edge of the end wall shielding portion and covering the inner wall surface of the end wall, and the inner wall shielding portion is provided with two convex bulges extending into the slot.

[0012] In a preferred embodiment, the socket connector includes an island protection bracket integrally injection molded at the end of the island portion, the island protection bracket is provided with a top surface shielding portion covering the top surface of the end of the island portion, an end surface shielding portion bent downward from one longitudinal side of the top surface shielding portion and covering the end surface of the island portion, and an embedded portion extending from the bottom of the end surface shielding portion toward the end wall, the embedded portion is integrally molded at the bottom of the socket body and exposed at the bottom surface of the socket body.

[0013] In a preferred embodiment, the plug connector includes metal reinforcements located at both longitudinal ends of the plug body, and the metal reinforcement has a pair of components that are independent of each other and arranged laterally on the end wall portion, each of the components includes an end wall shielding sheet that at least partially covers the end wall portion, a side wall shielding sheet that at least partially covers the side wall portion, and a bent portion connecting the end wall shielding sheet and the side wall shielding sheet.

[0014] In a preferred embodiment, the end wall shielding piece includes an end wall outer wall shielding portion covering the end wall outer wall and an end wall inner wall shielding portion bent inward from the top of the end wall outer wall shielding portion and covering the end wall top surface and the inner wall; the side wall shielding piece includes a side wall outer wall shielding portion covering the side wall outer wall and a side wall inner wall shielding portion bent inward from the top of the side wall outer wall shielding portion and covering the side wall top surface and the inner wall; the bent portion is connected to the end wall outer wall shielding portion and the side wall outer wall shielding portion.

[0015] 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 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 portion, the U-shaped contact portion, the inner wall contact portion and the second welding portion jointly form the shortest current path, and 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, thereby making the overall impedance of the board-to-board connector smaller, which is beneficial to improving the current capacity of the board-to-board connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of a board-to-board connector in a preferred embodiment of the present invention.

[0017] Figure 2 yes Figure 1 A perspective view of an unmated board-to-board connector is shown.

[0018] Figure 3 yes Figure 2 A three-dimensional schematic diagram of a socket connector in a board-to-board connector is shown.

[0019] Figure 4 yes Figure 3 An exploded view of the receptacle connector is shown.

[0020] Figure 5 yes Figure 2 A perspective schematic diagram of a plug connector in a board-to-board connector is shown.

[0021] Figure 6 yes Figure 5 An exploded view of the plug connector is shown.

[0022] Figure 7 yes Figure 1 A cross-sectional view of a board-to-board connector shown unmated.

[0023] Figure 8 yes Figure 1 A cross-sectional view of a board-to-board connector when mated is shown. DETAILED DESCRIPTION

[0024] See also Figures 1 to 6As shown, a preferred embodiment of the present invention discloses a board-to-board connector, which includes a socket connector 100 and a plug connector 200 that cooperate with each other. The socket connector 100 is mounted on a first circuit board 300, and the plug connector 200 is mounted on a second circuit board 400. When the socket connector 100 and the plug connector 200 cooperate, the first circuit board 300 and the second circuit board 400 are connected through the board-to-board connector.

[0025] See also Figures 2 to 4 As shown, the socket connector 100 includes a socket body 10 extending in the longitudinal direction, a socket terminal 20 fixed on the socket body 10, and protective brackets located at both ends of the socket body 10 in the longitudinal direction. The socket body 10 is provided with a central island 11 extending in the longitudinal direction, two side walls 12 located at both sides of the island 11 in the transverse direction, and two end walls 13 connected to the two side walls 12. The island 11, the two side walls 12, and the two end walls 13 jointly define a slot 14, and the slot 14 can be inserted into the plug connector 200.

[0026] The socket terminal 20 is provided with a fixing portion 21 fixed on the side wall 12, a U-shaped contact portion 22 extending from one end of the fixing portion 21 into the slot 14, a first solder leg 23 extending from the other end of the fixing portion 21 out of the socket body 10, and a 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 25 exposed to the bottom surface of the socket body 10, a first arm 26 extending upward from a side of the base 25 adjacent to the island 11, and a second arm 27 extending upward from a side of the base 25 adjacent to the side wall 12 and connected to the top of the fixing portion 21, and the first soldering portion 24 is located at the bottom surface of the base 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 inward. The first soldering portion 24 and the first solder leg 23 are both exposed to 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.

[0027] 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 terminals in the longitudinal direction. The power terminals and the signal terminals have the same structure in the transverse cross section, and the difference between the two is that the longitudinal length of the power terminals is much greater than the longitudinal length of the signal terminals to ensure that the power terminals can conduct large currents. At the same time, the thickness of the power terminals of the socket terminal 20 is 0.1 mm, thereby reducing the impedance of the power terminals.

[0028] The protection bracket includes an island protection bracket 30 integrally injection-molded at the end of the island 11 and an end wall protection bracket 40 assembled and fixed on the end wall 13, so as to improve the overall strength of the socket connector 100. The island protection bracket 30 is integrally injection-molded at the end of the island 11 and is provided with a top surface shielding portion 31 covering the top surface of the end of the island 11 and an end surface shielding portion 32 covering the end surface of the end of the island 11, and the end surface shielding portion 32 is formed by bending downward from one longitudinal side of the top surface shielding portion 31. The island protection bracket 30 is integrally injection-molded at the island 11, thereby improving the strength of the island 11 of the socket body 10 and avoiding damage to the island 11 when the socket connector 100 is plugged in or out. The island protection bracket 30 is also provided with an embedded portion 34 extending from the bottom of the end surface shielding portion 32 toward the end wall 13, and the embedded portion 34 is integrally formed at the bottom of the socket body 10 and exposed at the bottom surface of the socket body 10.

[0029] 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 sheet 41 covering the end wall 13 and a side wall shielding sheet 42 at least partially covering the side wall 12, and the side wall shielding sheet 42 is connected to the lateral ends of the end wall shielding sheet 41. The end wall shielding sheet 41 is provided with an end wall shielding portion 411 covering the top surface of the end wall 13, an outer wall shielding portion 412 bent from the outer side edge of the end wall shielding portion 411 and covering the outer wall surface of the end wall 13, and an inner wall shielding portion 413 bent from the inner side edge of the end wall shielding portion 411 and covering the inner wall surface of the end wall 13, and the outer wall shielding portion 412 is provided with elastic arms 414 extending from the lateral ends thereof along the inner wall surface of the side wall 12. The elastic arm 414 is provided with a protrusion 415 protruding into the slot 14, and the inner wall shielding portion 413 is provided with two convex bumps 416 protruding into the slot 14, so as to ensure the passage of large current when the socket connector 100 is plugged in.

[0030] The end wall 13 is provided with a slot 17 that penetrates the end wall 13 in the longitudinal direction and communicates 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 in the longitudinal direction 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 a clearance groove 15 corresponding to the elastic arm 414. The clearance groove 15 is formed by being recessed from the inner wall surface of the side wall 12 so that the elastic arm 414 has sufficient movement space when elastically deforming.

[0031] The side wall shielding sheet 42 of the end wall protection bracket 40 is provided with side wall shielding portions 421 extending longitudinally from both ends of the end wall shielding portion 411, and the side wall shielding portions 421 at least partially cover the top surface of the side wall 12. The side wall shielding portions 421 at least partially cover the top of the elastic arm 414, so as to protect the elastic arm 414 and limit the elastic arm 414. The side wall shielding sheet 42 is also provided with a welding foot 422 extending downwardly from the outer side of the side wall shielding portion 421, and the welding foot 422 can be fixedly mounted on the first circuit board 300 electrically connected to the socket connector 100.

[0032] The welding foot 422 is snapped on the outer wall surface of the side wall 12 to fix 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 surface of the side wall 12, and the welding foot 422 is received in the locking groove 16 and is provided with a barb snapped on the wall surface of the locking groove 16 to enhance the stability of the end wall protection bracket 40 fixed to the socket body 10.

[0033] See also Figures 5 and 6 As shown, the plug connector 200 includes a plug body 50 extending in the longitudinal direction, a terminal 60 fixed on the plug body 50, and metal reinforcements located at both ends of the plug body 50 in the longitudinal direction. The plug body 50 is provided with two side walls 51 extending in the longitudinal direction and two end walls 52 connected to the two side walls 51. The two side walls 51 and the two end walls 52 jointly define a receiving groove 53, and the receiving groove 53 can be inserted into the island portion 11 of the socket connector 100.

[0034] The plug terminal 60 is fixed on the side wall portion 51 and is provided with 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, a connecting portion 63 connecting the inner wall contact portion 61 and the top of the outer wall contact portion 62, a second soldering portion 64 located at the bottom of the inner wall contact portion 61, and a second soldering foot 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, the second soldering portion 64 and the second soldering foot 65 are both exposed on the bottom surface of the plug body 50 and located in the same plane, so as to be soldered on the second circuit board 400.

[0035] The metal reinforcement is integrally injection molded at both ends of the plug body 50 in the longitudinal direction to improve the overall strength of the plug connector 200. The metal reinforcement has a pair of components 70 that are independent of each other and arranged transversely on the end wall portion 52. Each of the components 70 is wrapped around the outside of the plug body 50, which improves the strength of the plug body 50 and prevents damage to the plug body 50 when the plug connector 200 is plugged in or out. The components 70 include an end wall shielding sheet 71 that at least partially covers the end wall portion 52, a side wall shielding sheet 72 that at least partially covers the side wall portion 51, and a bent portion 73 connecting the end wall shielding sheet 71 and the side wall shielding sheet 72.

[0036] The end wall shielding sheet 71 includes an end wall outer wall shielding portion 711 covering the outer wall of the end wall 52 and an end wall inner wall shielding portion 712 bent inwardly from the top of the end wall outer wall shielding portion 711 and covering the top surface and inner wall of the end wall 52. The side wall shielding sheet 72 includes a side wall outer wall shielding portion 721 covering the outer wall of the side wall 51 and a side wall inner wall shielding portion 722 bent inwardly from the top of the side wall outer wall shielding portion 721 and covering the top surface and inner wall of the side wall 51. The bent portion 73 is connected between the end wall outer wall shielding portion 711 and the side wall outer wall shielding portion 721. At the same time, the bottom of the side wall outer wall shielding portion 721 can be fixedly mounted on the second circuit board 400 electrically connected to the plug connector 200.

[0037] In this 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 terminals in the longitudinal direction. The side wall shielding sheet 72 of the component 70 constitutes the power terminal of the plug terminal 60, which is used to dock with the power terminal of the socket terminal 20. The power terminal of the plug terminal 60 has the same structure as the signal terminal in the transverse section, and the difference between the two is that the longitudinal length of the power terminal is much greater than the longitudinal length of the signal terminal and is connected to the end wall shielding sheet 71 to ensure that it can conduct large current. At the same time, the thickness of the power terminal of the plug terminal 60 (i.e., the side wall shielding sheet 72) is 0.1 mm, thereby reducing the impedance of the power terminal.

[0038] Combination Figure 7 and Figure 8As shown, when the socket connector 100 is matched with the plug connector 200, the island portion 11 of the socket body 10 is received in the receiving groove 53 of the plug body 50, and the side wall portion 51 and the end wall portion 52 of the plug body 50 are received 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 protrusion 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 bump 416 abuts against the side wall outer wall shielding portion 721 of the member 70, so that reflux can be formed at both abutting points to form multi-point contact, reduce impedance, and increase flow capacity.

[0039] 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 contacts 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 and the locking portion 66 of the outer wall contact portion 62 are locked with each other. Thereby, a plurality of flow paths (i.e., 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. Compared with the conventional technology that only forms a single flow path between the first welding leg and the second welding leg, the present invention increases the flow capacity between the terminals by setting a plurality of flow paths.

[0040] The through-current path formed between the first welding portion 24 and the second welding portion 64 is smaller than the through-current path formed between the first welding leg 23 and the second welding leg 65, and the through-current path formed by the first welding portion 24, the U-shaped contact portion 22, the inner wall contact portion 61 and the second welding portion 64 is minimized, thereby enabling fast charging of the terminal device. In this embodiment, the maximum current conducted by the through-current path between the power terminals is 20A.

[0041] In summary, the above are only preferred embodiments of the present invention, and should not be used to limit the scope of the present invention. That is, all simple equivalent changes and modifications made according to the claims and description of the present invention should still fall within the scope of the patent of the present invention.

Claims

1. A board-to-board connector, comprising a socket connector and a plug connector that cooperate with each other, the socket connector comprising a socket body and a socket terminal held on the socket body, the socket body being provided with two side walls extending in the longitudinal direction and two end walls connecting the two side walls, the two side walls and the two end walls surrounding and forming a slot, the socket terminal being provided with a fixing portion held on the side walls and a U-shaped contact portion extending from one end of the fixing portion into the slot, the plug connector comprising a plug body and a plug terminal held on the plug body, the plug body being provided with two side walls extending in the longitudinal direction and two end walls connecting the two side walls, the plug terminal being provided with an inner wall contact portion located on the inner wall of the side wall portion, an outer wall contact portion located on the outer wall of the side wall portion and a connecting portion connecting the inner wall contact portion and the top end of the outer wall contact portion, the U-shaped contact portion simultaneously contacting the inner wall contact portion and the outer wall contact portion; 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 a first welding leg extending from the other end of the fixing portion to the socket body; 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 to the plug body; when the socket connector is mated with the plug connector, the first welding portion, the U-shaped contact portion, the inner wall contact portion and the second welding portion jointly form a current path, and a current path is also formed between the first welding leg and the second welding leg; therefore, several current paths are formed between the first welding portion and the first welding leg of the socket terminal and the second welding portion and the second welding leg of the plug terminal, and the maximum current conducted by the current path is 20A.

2. The board-to-board connector according to claim 1, wherein: The side wall portion and the end wall portion of the plug body are arranged to form a receiving groove, and the socket body includes a central island portion located in the slot. When the socket connector is mated with the plug connector, the island portion is received in the receiving groove of the plug body, and the side wall portion and the end wall portion of the plug body are received in the slot.

3. The board-to-board connector according to claim 2, wherein: The U-shaped contact portion includes a base exposed on the bottom surface of the socket body, a first arm extending upward from a side of the base adjacent to the island portion, and a second arm extending upward from a side of the base adjacent to the side wall and connected to the top of the fixing portion. The first welding portion 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 portion, and the second arm contacts the outer wall contact portion.

4. The board-to-board connector according to 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 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 locked with each other.

5. The board-to-board connector according to claim 1, wherein: The socket connector includes end wall protection brackets located at the longitudinal ends of the socket body, the end wall protection brackets are assembled and fixed on the end wall and are provided with an end wall shielding piece covering the end wall and a side wall shielding piece at least partially covering the side wall, 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 an outer wall shielding portion bent from the outer side edge of the end wall shielding portion and covering the outer wall surface of the end wall, the outer wall shielding portion is provided with elastic arms extending along the inner wall surface of the side wall at its lateral ends.

6. The board-to-board connector according to claim 5, wherein: The end wall is provided with a narrow slot which penetrates the end wall in the longitudinal direction and communicates with the slot. The elastic arm passes through the narrow slot from the outer side of the end wall and extends into the slot. The elastic arm is provided with a protrusion which protrudes into the slot.

7. The board-to-board connector according to claim 6, wherein: The end wall shielding sheet also includes an inner wall shielding portion bent from the inner side edge of the end wall shielding portion and covering the inner wall surface of the end wall, and the inner wall shielding portion is provided with two convex hulls extending into the slot.

8. The board-to-board connector according to claim 1, wherein: The socket connector includes an island protection bracket integrally injection-molded at the end of the island portion, the island protection bracket is provided with a top surface shielding portion covering the top surface of the end of the island portion, an end surface shielding portion bent downward from one longitudinal side of the top surface shielding portion and covering the end surface of the end of the island portion, and an embedded portion extending from the bottom of the end surface shielding portion toward the end wall, the embedded portion is integrally molded at the bottom of the socket body and exposed at the bottom surface of the socket body.

9. The board-to-board connector according to claim 1, wherein: The plug connector includes metal reinforcements located at both longitudinal ends of the plug body, and the metal reinforcement has a pair of components that are independent of each other and arranged laterally on the end wall portion, each of the components includes an end wall shielding sheet that at least partially covers the end wall portion, a side wall shielding sheet that at least partially covers the side wall portion, and a bent portion connecting the end wall shielding sheet and the side wall shielding sheet.

10. The board-to-board connector according to claim 9, wherein: The end wall shielding piece includes an end wall outer wall shielding portion covering the end wall outer wall and an end wall inner wall shielding portion bent inward from the top of the end wall outer wall shielding portion and covering the end wall top surface and the inner wall. The side wall shielding piece includes a side wall outer wall shielding portion covering the side wall outer wall and a side wall inner wall shielding portion bent inward from the top of the side wall outer wall shielding portion and covering the side wall top surface and the inner wall. The bent portion is connected to the end wall outer wall shielding portion and the side wall outer wall shielding portion.

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