Electric connector combination and plug electric connector thereof

Abstract

The utility model relates to an electric connector combination, which comprises a plug electric connector and a socket electric connector matched with the plug electric connector, the plug electric connector comprises a plug body, a plurality of plug terminals arranged on the plug body and a soft board, the soft board comprises a plurality of bending sections, and the bending sections are respectively arranged in grooves of the plug body; the socket electric connector comprises a socket body and a plurality of socket terminals arranged on the socket body; when the plug electric connector and the first circuit board on the plug electric connector and the socket electric connector and the second circuit board on the socket electric connector are vibrated by external force, the bent sections of the flexible board are separated from the grooves and the flexible board is extended from the bent state to the unfolded state, and the first circuit board can be connected with the plug terminals through the flexible board when being separated from the plug body. And the shockproof requirement can be met under the condition that the plug electric connector and the socket electric connector are in stable contact.

Description

Technical Field

[0001] The utility model relates to a connector assembly, in particular to an electrical connector assembly and a plug electrical connector thereof. Background Art

[0002] A board-to-board (BTB) electrical connector is an electrical connector assembly consisting of a plug connector and a corresponding receptacle connector. The plug connector has multiple male terminals, while the receptacle has multiple female terminals. When the plug and receptacle are plugged together, the male terminals mate with the female terminals, enabling signal transmission between the two printed circuit boards (PCBs) to which they are soldered. When the two PCBs are pulled apart by vibration, they can easily separate from the plug and receptacle connectors. Utility Model Content

[0003] The present invention provides an electrical connector assembly comprising a plug electrical connector, a first circuit board, a receptacle electrical connector, and a second circuit board. The plug electrical connector comprises a plug body, a plurality of plug terminals, and a flexible circuit board. The plug body comprises a mating side and a soldering side. The mating side comprises a mating protrusion and a plurality of first terminal slots located on either side of the mating protrusion. The soldering side comprises a central fixing portion and side fixing portions located on either side of the central fixing portion. The two sides of the plug body comprise grooves located between the central fixing portion and each of the side fixing portions. Each plug terminal is disposed in a first terminal slot. One end of each plug terminal comprises a plurality of plug soldering sections that are exposed on the soldering side of the plug body and are disposed on the central fixing portion. The flexible circuit board comprises a central connecting portion, side positioning portions, and bent sections located on either side of the central connecting portion. The central connecting portion is fixed to the central fixing portion. Each bent section is disposed in a respective groove. One surface of each side positioning portion is mated to each of the side fixing portions. The first circuit board is disposed on the soldering side of the plug body and comprises a plurality of first contacts connected to the other surface of each side positioning portion. The receptacle electrical connector comprises a receptacle body and a plurality of receptacle terminals. The socket body includes a docking side and a soldering side. The docking side includes a docking recess and a plurality of second terminal slots located on either side of the docking recess. Each socket terminal is positioned in each second terminal slot, and one end of each socket terminal includes a plurality of socket soldering segments exposed on the soldering side of the socket body. A second circuit board is positioned on the soldering side of the socket body and includes a plurality of second contacts connected to each socket soldering segment. When the plug connector is plugged into the receptacle connector, the side positioning portions of the flexible circuit board are adapted to be pulled apart by the first circuit board away from the plug body, allowing the bent segments of the flexible circuit board to exit the recesses and extend from a bent state to an unfolded state.

[0004] Preferably, the other end of each plug terminal includes a plurality of plug contact sections exposed in each first terminal groove, and the other end of each socket terminal includes a plurality of socket contact sections exposed in each second terminal groove. When the docking protrusion is inserted into the docking recess, each plug contact section contacts each socket contact section respectively.

[0005] Preferably, the central connecting portion of the flexible circuit board has a plurality of through holes, and each plug welding section of each plug terminal is connected to each through hole respectively.

[0006] Preferably, the soft board includes a plurality of fitting parts respectively fitted between one surface of each side positioning portion and each side fixing portion.

[0007] Preferably, each bending section of the flexible board has a plurality of protrusions and a plurality of disconnected portions located between the protrusions.

[0008] Preferably, the plug body includes two buckling parts on the mating side, and the socket body includes two buckling parts on the mating side. When the plug electrical connector is plugged into the socket electrical connector, each buckling part is respectively locked in each buckling part.

[0009] Preferably, both ends of the docking protrusion include outer guide portions protruding outward, and the opening of the docking recess includes inner guide portions extending obliquely. When the docking protrusion is inserted into the docking recess, the outer guide portions contact the inner guide portions.

[0010] Preferably, when the plug electrical connector is plugged into the socket electrical connector, a first distance is provided between the first circuit board and the second circuit board. When the first circuit board moves away from the second circuit board, a second distance is provided between the first circuit board and the second circuit board that is greater than the first distance.

[0011] Preferably, a plug electrical connector is provided, comprising a plug body, a plurality of plug terminals, and a flexible board. The plug body comprises a docking side and a welding side, the plug body having a docking protrusion and a plurality of first terminal grooves on both sides of the docking protrusion on the docking side, the plug body comprising a central fixing portion and side fixing portions on both sides of the central fixing portion on the welding side, and both sides of the plug body comprising grooves between the central fixing portion and each side fixing portion. Each plug terminal is disposed in each first terminal groove, and one end of each plug terminal comprises a plurality of plug welding sections exposed outside the welding side of the plug body and disposed in the central fixing portion. The flexible board comprises a central connecting portion, a bending section and a side positioning section on both sides of the central connecting portion, the central connecting portion being fixed to the central fixing portion, each bending section being respectively disposed in each groove, and one surface of each side positioning portion being respectively docked with each side fixing portion.

[0012] Preferably, the soldering side of the plug body is suitable for being arranged on a first circuit board, and the first circuit board includes a plurality of first contacts connected to the other side of each side positioning portion.

[0013] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0014] 1. The flexible board is arranged on the welding side of the plug body so that the two bending sections of the flexible board are pre-positioned in the grooves of the plug body, so that each bending section can be separated from the groove and stretch out.

[0015] 2. When the plug connector and the receptacle connector are subjected to external vibration, the bent sections of the flexible board are released from the grooves and extend from a bent state to an expanded state. Even when the first circuit board is separated from the plug body, the plug terminals can be connected via the flexible board, ensuring that the plug connector and the receptacle connector maintain stable contact and meet vibration resistance requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 According to some embodiments, a schematic diagram of the appearance of the plug electrical connector and the first circuit board is drawn.

[0017] Figure 2 According to some embodiments, an exploded schematic diagram of the receptacle electrical connector and the second circuit board is drawn.

[0018] Figure 3 According to some embodiments, an exploded schematic diagram of the front side of a plug electrical connector is drawn.

[0019] Figure 4 According to some embodiments, a schematic diagram of the appearance of the back side of a plug electrical connector is drawn.

[0020] Figure 5 draw Figure 1 The cross-sectional schematic diagram of part 5-5 is a cross-sectional schematic diagram of the plug electrical connector and the first circuit board.

[0021] Figure 6 According to some embodiments, a schematic diagram of the appearance of a plug electrical connector and a receptacle electrical connector before being plugged into each other is drawn.

[0022] Figure 7 According to some embodiments, a schematic diagram of the appearance of a plug electrical connector and a receptacle electrical connector after being plugged together is drawn.

[0023] Figure 8 draw Figure 7 The partial cross-sectional diagram of part 8-8 shows the state when the snap-fitting portion of the plug electrical connector and the snap-fitting portion of the receptacle electrical connector are engaged.

[0024] Figure 9 According to some embodiments, a schematic transverse cross-sectional view of an electrical connector assembly is drawn.

[0025] Figure 10According to some embodiments, a longitudinal cross-sectional diagram of an electrical connector assembly is drawn.

[0026] Figure 11 According to some embodiments, a cross-sectional schematic diagram of an electrical connector assembly is drawn, and each bending section of the flexible circuit board is in a bent state.

[0027] Figure 12 According to some embodiments, a cross-sectional schematic diagram of an electrical connector assembly is drawn, in which each bending section of the flexible circuit board is in an unfolded state.

[0028] Explanation of symbols

[0029] 100: Plug electrical connector

[0030] 200: Socket electrical connector

[0031] 300: First circuit board

[0032] 301: First contact

[0033] 400: Second circuit board

[0034] 401: Second contact

[0035] 11: Plug body

[0036] 11a: Docking side

[0037] 11b: welding side

[0038] 111:Butt convex part

[0039] 1111: outer guide part

[0040] 112: First terminal slot

[0041] 114: Central fixing part

[0042] 115: Side fixing part

[0043] 116: Groove

[0044] 117: buckle part

[0045] 13: Plug terminal

[0046] 131: Plug welding section

[0047] 133: Plug contact section

[0048] 15: Soft board

[0049] 154: Central connection

[0050] 1541:Piercing

[0051] 155: side positioning part

[0052] 155a: One side

[0053] 155b: The other side

[0054] 156:Bending section

[0055] 1561: Raised part

[0056] 1562: Disconnection

[0057] 157:Fitting parts

[0058] 21: Socket body

[0059] 21a: Docking side

[0060] 21b: welding side

[0061] 211: docking recess

[0062] 2111:Inner guide

[0063] 212: Second terminal slot

[0064] 217: buckle part

[0065] 23: Socket terminal

[0066] 231: Socket welding section

[0067] 233: socket contact section

[0068] D1: first spacing

[0069] D2: Second spacing

[0070] P1: Bending state

[0071] P2: Expanded state

[0072] X: first axis

[0073] Y: Second axis

[0074] Z: The third axis. DETAILED DESCRIPTION

[0075] Reference Figure 1 and Figure 2 , Figure 1 To draw a schematic diagram of the appearance of the plug electrical connector 100 and the first circuit board 300, Figure 2This is an exploded diagram of the receptacle connector 200 and the second circuit board 400. The electrical connector assembly includes a plug connector 100 (plug), a receptacle connector 200 (receptacle), a first circuit board 300, and a second circuit board 400. This is a board-to-board (BTB) electrical connector used for connecting various in-vehicle devices and electronic products. The plug connector 100 includes a plug body 11, multiple plug terminals 13, and a flexible circuit board 15; the receptacle connector 200 includes a receptacle body 21 and multiple receptacle terminals 23.

[0076] Reference Figures 3 to 5 , Figure 3 This is an exploded diagram of the front side of the plug electrical connector 100. Figure 4 FIG. 1 is a schematic diagram showing the back side appearance of the plug electrical connector 100. Figure 5 To draw Figure 1 Section 5-5 of FIG. 5 is a cross-sectional diagram of the plug electrical connector 100 and the first circuit board 300. The plug body 11 of the plug electrical connector 100 is a long rectangular plastic body. The long sides of the plug body 11 extend along the third axis Z, the short sides of the plug body 11 extend along the first axis X, and the height of the plug body 11 extends along the second axis Y. When viewed along the third axis Z, the plug body 11 generally has a convex shape. The two sides of the plug body 11 include a mating side 11a and a welding side 11b. The plug body 11 has a mating protrusion 111 and a plurality of first terminal grooves 112 located on both sides of the mating protrusion 111 on the mating side 11a. The plug body 11 includes a central fixing portion 114 and side fixing portions 115 located on both sides of the central fixing portion 114 on the welding side 11b. Each first terminal groove 112 extends from the central fixing portion 114 to both sides of the mating protrusion 111. The two sides of the plug body 11 include grooves 116 located between the central fixing portion 114 and each side fixing portion 115.

[0077] Multiple plug terminals 13 are disposed in each first terminal slot 112. One end of each plug terminal 13 includes multiple plug soldering sections 131 that are exposed on the soldering side 11b of the plug body 11 and disposed on the central fixing portion 114. There are 24 plug terminals 13. In some embodiments, each plug terminal 13 is a generally elongated, elastic terminal when viewed along the third axis Z. The other end of each plug terminal 13 includes multiple plug contact sections 133 that are exposed in each first terminal slot 112. Each plug contact section 133 is in the form of a bent protrusion.

[0078] The flexible board 15 includes a central connecting portion 154 and side positioning portions 155 and bent sections 156 located on both sides of the central connecting portion 154. The central connecting portion 154 is fixed to the central fixing portion 114. The bent sections 156 are respectively disposed in the grooves 116. A surface 155a of each side positioning portion 155 is respectively connected to each side fixing portion 115.

[0079] In some embodiments, the flexible board 15 is a metal sheet covered with an insulating layer. The central connecting portion 154 of the flexible board 15 has a plurality of through-holes 1541 (welding areas). The metal is exposed at the through-holes 1541 of the flexible board 15. The flexible board 15 is covered with an insulating layer in other areas outside the welding areas. The plug welding sections 131 of each plug terminal 13 are respectively connected to each through-hole 1541 and fixed with solder.

[0080] In some embodiments, the flexible circuit board 15 is a rectangular metal sheet. The flexible circuit board 15 is bent on both sides of the flexible circuit board 15 to form bent sections 156 that protrude upward along the second axis Y. Each bent section 156 on both sides of the flexible circuit board 15 has a plurality of protrusions 1561 and a plurality of disconnected sections 1562 located between the protrusions 1561. When viewed from the third axis Z, the protrusions 1561 generally appear to be U-shaped, rotated 180 degrees. Disconnected sections 1562 located between the protrusions 1561 facilitate extension and deployment of the bent sections 156.

[0081] In some embodiments, the multiple protrusions 1561 of the flexible circuit board 15 are arranged in two rows along the first axis X. The number of protrusions 1561 in a single row is approximately 12 or 13, but is not limited to this. In some embodiments, the number of protrusions 1561 in a single row can be 1, 3, 6, or 9. Furthermore, the width of each protrusion 1561 can be adjusted accordingly, for example, with a smaller number of protrusions, the width is wider, while with a larger number, the width is narrower.

[0082] In some embodiments, the soft board 15 includes multiple fittings 157, which can be elements that provide adhesive functions such as glue or tape. When the fittings 157 are double-sided tape, each fitting 157 is respectively adhered between one side 155a of each side positioning portion 155 and each side fixing portion 115, so that each side positioning portion 155 is respectively fixed to each side fixing portion 115, providing a temporary fixation effect. When each side positioning portion 155 is pulled away from each side fixing portion 115 by force, each side positioning portion 155 can be separated from each side fixing portion 115.

[0083] After the flexible circuit board 15 and the plug terminals 13 are installed in the plug body 11, the plug body 11 can be mounted on the first circuit board 300, with the first circuit board 300 positioned on the soldering side 11b of the plug body 11. The first circuit board 300 includes a plurality of first contacts 301, each of which is soldered to the other surface 155b (soldering area) of each side retaining portion 155. This secures the first circuit board 300 and the side retaining portions 155, preventing them from falling off. A jig can be used to press down on the top of the plug body 11 to ensure close contact between the first contacts 301 and the side retaining portions 155, ensuring that solder is fully applied between the first contacts 301 and the side retaining portions 155. After soldering, the jig can be removed, completing the assembly of the plug connector 100 and the first circuit board 300.

[0084] Reference Figures 6 to 8 , Figure 6 Schematic diagram of the appearance of the plug electrical connector 100 and the receptacle electrical connector 200 before being plugged in. Figure 7 Schematic diagram of the appearance of the plug electrical connector 100 and the receptacle electrical connector 200 after being plugged in. Figure 8 To draw Figure 7 The partial cross-sectional diagram of part 8-8 of FIG. 1 shows the state when the snap-fit ​​portion 117 of the plug electrical connector 100 and the snap-fit ​​portion 217 of the socket electrical connector 200 are engaged. In some embodiments, the plug body 11 includes two snap-fit ​​portions 117 on the mating side 11a, and the socket body 21 includes two snap-fit ​​portions 217 on the mating side 21a. Each snap-fit ​​portion 117 is a cantilever structure with a hook portion. Each cantilever structure extends along the second axis Y direction and is arranged on two sides of the plug body 11. There is a distance between each cantilever structure and the two sides of the plug body 11. Each snap-fit ​​portion 217 is a recess with a stopper, and each recess is as shown in FIG. Figure 7 They extend along the second axis Y and are disposed on both sides of the socket body 21. When the plug connector 100 is plugged into the receptacle connector 200, the snap-fit ​​portions 117 are respectively engaged with the snap-fit ​​portions 217, and the hooks of the cantilever structures are engaged with the blocks in the recesses.

[0085] Reference Figure 6 、 Figure 9 and Figure 10 , Figure 9 This is a schematic cross-sectional view of an electrical connector assembly. Figure 10 In some embodiments, the two ends of the docking protrusion 111 include outer guide portions 1111 protruding outwards, and each outer guide portion 1111 is formed by Figure 6 The second axis Y direction is shown as a semicircular convex block, and the outer guide portions 1111 are rounded on the sides facing outwards. Figure 10When viewed in the direction of the first axis X, the sides of the outer guide portions 1111 facing outward relative to each other are inclined surfaces. The opening of the docking recess 211 includes an inner guide portion 2111 extending obliquely. The inner guide portion 2111 is an oblique angle structure and is located at the opening of the docking recess 211. When the docking protrusion 111 is inserted into the docking recess 211, the outer guide portion 1111 contacts and guides the inner guide portion 2111. By providing the guiding function of the outer guide portion 1111 and the inner guide portion 2111, the plug electrical connector 100 and the receptacle electrical connector 200 can be effectively guided into position when they are obliquely plugged in, for example, by Figure 9 The angle between the plug electrical connector 100 and the receptacle electrical connector 200 is about 10 degrees when viewed from the third axis Z direction, which can effectively guide the plugging in place. Alternatively, Figure 10 When viewed from the first axis X direction, the angle between the plug connector 100 and the receptacle connector 200 is about 6 degrees, which can effectively guide the plugging into place.

[0086] Reference Figure 2 、 Figure 6 and Figure 7 The socket body 21 of the socket electrical connector 200 is a long rectangular plastic body. The long side of the socket body 21 extends along the third axis Z direction, the short side of the socket body 21 extends along the first axis X direction, and the height of the socket body 21 extends along the second axis Y direction. When viewed along the third axis Z direction, the socket body 21 generally has a convex shape. The socket body 21 of the socket electrical connector 200 includes a mating side 21a and a welding side 21b. Figure 2 The mating side 21a and the soldering side 21b are both facing one side of the second circuit board 400. Figure 6 The mating side 21 a and the welding side 21 b are located on a side of the socket body 21 facing the plug connector 100 . The socket body 21 has a mating recess 211 and a plurality of second terminal slots 212 on both sides of the mating recess 211 on the mating side 21 a .

[0087] A plurality of socket terminals 23 are disposed in each second terminal slot 212. One end of each socket terminal 23 includes a plurality of socket welding sections 231 exposed on the welding side 21b of the socket body 21. The number of the plurality of socket terminals 23 is 24.

[0088] The second circuit board 400 is disposed on the soldering side 21 b of the socket body 21 . The second circuit board 400 includes a plurality of second contacts 401 connected to each socket soldering segment 231 .

[0089] In some embodiments, each receptacle terminal 23 has a roughly U-shaped, flat terminal shape, as viewed along the third axis Z. The other end of each receptacle terminal 23 includes multiple receptacle contact segments 233 exposed within each second terminal slot 212. Each receptacle contact segment 233 is a long arm, while each receptacle welding segment 231 is a short arm. When the mating protrusion 111 is inserted into the mating recess 211, each plug contact segment 133 contacts a respective receptacle contact segment 233.

[0090] Reference Figure 11 and Figure 12 , Figure 11 This is a cross-sectional view of the electrical connector assembly, in which the bending sections 156 of the flexible board 15 are in a bent state. Figure 12 This is a cross-sectional view of the electrical connector assembly, showing the bent sections 156 of the flexible circuit board 15 in an extended state. When the plug connector 100 is plugged into the receptacle connector 200, the side positioning portions 155 of the flexible circuit board 15 are adapted to be pulled apart by the first circuit board 300 in a direction away from the plug body 11 (in the direction of the second axis Y), allowing the bent sections 156 of the flexible circuit board 15 to move downwardly along the second axis Y and out of the grooves 116, extending the bent sections 156 of the flexible circuit board 15 from a bent state P1 to an extended state P2. That is, when the plug connector 100 and the receptacle connector 200 are subjected to external vibration, the bent sections 156 of the flexible circuit board 15 are released from the grooves 116 and extend from the bent state P1 to the extended state P2, thereby maintaining the connection between the flexible circuit board 15, the first circuit board 300, and the plug terminals 13. Furthermore, when the first circuit board 300 is separated from the plug body 11 due to the external vibration, the bent sections 156 of the flexible circuit board 15, when extended, can also be connected and fixed to the plug soldering sections 131 of the plug terminals 13 via the central connecting portion 154, and the side positioning portions 155 can be connected and fixed to the first contact points 301 of the first circuit board 300. This ensures that the plug connector 100 and the receptacle connector 200 maintain a stable electrical connection while also meeting vibration-proof requirements.

[0091] The distance between the first circuit board 300 and the second circuit board 400 changes due to external force vibration. When the plug connector 100 is plugged into the receptacle connector 200, a first distance D1 is established between the first circuit board 300 and the second circuit board 400. The first distance D1 is approximately 5.3 mm. When the first circuit board 300 moves away from the second circuit board 400, a second distance D2 is established between the first circuit board 300 and the second circuit board 400, which is greater than the first distance D1. The second distance D2 is approximately 6.8 mm. The length of each bent segment 156 of the flexible circuit board 15 in the extended state P2 is approximately 1.5 mm.

[0092] According to some embodiments, a flexible circuit board is positioned on the soldering side of the plug body, with two bent sections of the flexible circuit board pre-positioned within the grooves of the plug body. This allows each bent section to disengage from the grooves and extend. In some embodiments, when the plug connector and receptacle connector experience external vibration, the bent sections of the flexible circuit board disengage from the grooves and extend from a bent state to an extended state. This allows the flexible circuit board to connect to the plug terminals even when the first circuit board is detached from the plug body, ensuring stable contact between the plug connector and the receptacle connector while also meeting vibration-resistant requirements.

Claims

1. An electrical connector assembly, characterized in that : A plug electrical connector comprising: A plug body comprising a mating side and a welding side, the plug body having a mating protrusion on the mating side and a plurality of first terminal slots located on both sides of the mating protrusion, the plug body comprising a central fixing portion and a side fixing portion located on either side of the central fixing portion on the welding side, and a groove located between the central fixing portion and each of the side fixing portions on both sides of the plug body; a plurality of plug terminals disposed in each of the first terminal slots, one end of each of the plug terminals including a plurality of plug welding sections exposed from the welding side of the plug body and disposed on the central fixing portion; and A flexible board, comprising a central connecting portion, a side positioning portion and a bent section located on both sides of the central connecting portion, wherein the central connecting portion is fixed to the central fixing portion, the bent sections are respectively disposed in the grooves, and one surface of each side positioning portion is respectively butted against each side fixing portion; a first circuit board disposed on the soldering side of the plug body, the first circuit board including a plurality of first contacts connected to the other side of each of the side positioning portions; A socket electrical connector, comprising: A socket body including a docking side and a welding side, wherein the socket body has a docking recess on the docking side and a plurality of second terminal slots located on both sides of the docking recess; and a plurality of socket terminals disposed in each of the second terminal slots, one end of each of the socket terminals comprising a plurality of socket welding sections exposed on the welding side of the socket body; and a second circuit board disposed on the soldering side of the socket body, the second circuit board including a plurality of second contacts connected to each of the socket soldering segments; When the plug electrical connector is plugged into the socket electrical connector, the side positioning portions of the flexible board are adapted to be pulled away from the plug body by the first circuit board, so that the bent sections of the flexible board are released from the grooves and extended from a bent state to an unfolded state.

2. The electrical connector assembly according to claim 1, characterized in that The other end of each of the plug terminals includes a plurality of plug contact segments exposed in each of the first terminal slots, and the other end of each of the socket terminals includes a plurality of socket contact segments exposed in each of the second terminal slots. When the docking protrusion is inserted into the docking recess, each of the plug contact segments contacts each of the socket contact segments.

3. The electrical connector assembly according to claim 1, characterized in that The central connecting portion of the flexible board has a plurality of through holes, and the plug welding sections of the plug terminals are respectively connected to the through holes.

4. The electrical connector assembly according to claim 3, characterized in that The soft board includes a plurality of fitting parts, which are respectively fitted between one surface of each side positioning portion and each side fixing portion.

5. The electrical connector assembly according to claim 1, characterized in that : Each of the bending sections of the soft board has a plurality of protrusions and a plurality of disconnected portions located between the protrusions.

6. The electrical connector assembly according to claim 1, characterized in that : The plug body includes two snap-fitting parts on the docking side, and the socket body includes two snap-fitting parts on the docking side. When the plug electrical connector is plugged into the socket electrical connector, each snap-fitting part is respectively locked in each snap-fitting part.

7. The electrical connector assembly according to claim 1, characterized in that : The two ends of the docking protrusion include an outer guide portion protruding outward, and the opening of the docking recess includes an inner guide portion extending obliquely. When the docking protrusion is inserted into the docking recess, the outer guide portion contacts the inner guide portion.

8. The electrical connector assembly according to claim 1, characterized in that When the plug electrical connector is plugged into the socket electrical connector, a first distance is provided between the first circuit board and the second circuit board. When the first circuit board moves away from the second circuit board, a second distance greater than the first distance is provided between the first circuit board and the second circuit board.

9. A plug electrical connector, characterized in that : A plug body comprising a mating side and a welding side, the plug body having a mating protrusion on the mating side and a plurality of first terminal slots located on both sides of the mating protrusion, the plug body comprising a central fixing portion and a side fixing portion located on either side of the central fixing portion on the welding side, and a groove located between the central fixing portion and each of the side fixing portions on both sides of the plug body; a plurality of plug terminals disposed in each of the first terminal slots, one end of each of the plug terminals including a plurality of plug welding sections exposed outside the welding side of the plug body and disposed on the central fixing portion; and A flexible board includes a central connecting portion and a bending section and a side positioning portion located on two sides of the central connecting portion. The central connecting portion is fixed to the central fixing portion, each of the bending sections is respectively arranged in each of the grooves, and one surface of each of the side positioning portions is respectively connected to each of the side fixing portions.

10. The plug electrical connector according to claim 9, characterized in that :The soldering side of the plug body is suitable for being set on a first circuit board, and the first circuit board includes a plurality of first contacts connected to the other side of each of the side positioning portions.

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