Board-to-Board Connector Assemblies

Abstract

A board-to-board connector assembly includes a socket and a plug that cooperates with the socket, the plug including a plug body, a plug terminal and a plug reinforcement, the plug body including a top wall, a plug side wall extending downward from the longitudinal ends of the top wall, a plug guide formed at the transverse ends of the plug body, and an island receiving cavity located between the plug side wall and the plug guide; the socket includes a socket body, a socket terminal and a socket reinforcement, the socket body including a bottom wall, a socket side wall protruding upward from the longitudinal ends of the bottom wall, a socket guide formed at the transverse ends of the socket body, an island protruding upward from the bottom wall, and a plug side wall receiving cavity formed between the island and the socket side wall.

Description

Technical Field

[0001] The present application relates to the field of electrical connectors, and in particular to a board-to-board connector assembly. Background Art

[0002] Board-to-board connector components are widely used in the field of consumer electronics, such as smartphones, tablets, wearable devices, etc. Currently, smartphones and wearable devices have extremely high space requirements, and the size of components is also shrinking. The minimum height of the board-to-board plug and socket of the first-line board-to-board manufacturer has reached an ultra-low height of 0.6mm, and the terminal spacing has reached 0.25mm. Such a tiny connector has higher requirements for the strength of the connector structure. Compared with traditional board-to-board connector components, the large-scale functional integration of existing smartphones has higher requirements for current carrying capacity. For example, the current transmission requirement of LCD screens is 5A. The traditional board-to-board connector component design can no longer meet the current market requirements for strength and current transmission. Summary of the invention

[0003] In view of this, it is necessary to provide a board-to-board connector assembly that meets the requirements of having good strength and being able to transmit large current after being made thin and light.

[0004] To solve the above technical problems, the present application provides a board-to-board connector assembly, including a socket and a plug mating with the socket, the plug including a plug body, a plug terminal and a plug reinforcement, the plug body including a top wall, a plug side wall extending downward from the longitudinal ends of the top wall, a plug guide formed at the transverse ends of the plug body, and an island receiving cavity located between the plug side wall and the plug guide, the socket including a socket body, a socket terminal and a socket reinforcement, the socket body including a bottom wall, a socket side wall protruding upward from the longitudinal ends of the bottom wall, a socket guide formed at the transverse ends of the socket body, an island protruding upward from the bottom wall, and a plug side wall receiving cavity formed between the island and the socket side wall, the socket guide including a plug guide receiving cavity, a plug guide receiving cavity located laterally outside the plug guide receiving cavity The socket reinforcement comprises a main body portion covering the surface of the longitudinal outer wall, a transverse peripheral wall covering portion extending from the longitudinal sides of the main body portion in the transverse direction and covering the outside of the transverse peripheral wall, and an elastic arm portion extending from the transverse peripheral wall covering portion to the transverse peripheral wall on one side of the plug guide portion receiving cavity, the top of the elastic arm portion is bent and extended toward the longitudinal outside to form a hanging portion hung on the top surface of the transverse peripheral wall, and a contact piece is formed on the longitudinal peripheral wall covering portion at a position corresponding to the hanging portion. When the plug and the socket are matched, the plug reinforcement squeezes the elastic arm portion along the longitudinal outside and forces the hanging portion to move toward the longitudinal outside to electrically contact the contact piece, and at the same time, the plug reinforcement is electrically in contact with the elastic arm portion.

[0005] Preferably, the bottom of the longitudinal peripheral wall covering portion is fixed to the printed circuit board as a welding foot, and the current is transmitted from the plug reinforcement to the welding foot of the longitudinal peripheral wall covering portion through the hanging portion.

[0006] Preferably, the transverse peripheral wall of the socket body includes a supporting shoulder and an elastic avoidance portion located on the longitudinal inner side of the supporting shoulder and connected to the plug guide receiving cavity, and the elastic arm portion can generate elastic deformation in the longitudinal direction of the elastic avoidance portion.

[0007] Preferably, a mounting step portion is formed on the longitudinal outer side of the supporting shoulder portion, and the transverse peripheral wall covering portion extends onto the mounting step portion.

[0008] Preferably, the supporting shoulder portion is formed with a connecting step portion connected to the elastic avoidance portion at least at one end in the transverse direction, the elastic arm portion includes a tensioning portion bent from one transverse end of the transverse outer peripheral wall covering portion and extending on the connecting step portion, and an elastic main body arm extending at least partially from the tensioning portion in the transverse direction to the elastic avoidance portion, and the hanging portion is bent outwardly along the longitudinal direction from the top end of the elastic main body arm and hung above the supporting shoulder portion.

[0009] Preferably, the elastic main body arm protrudes toward the plug guide receiving cavity to form a contact protrusion. When viewed from top to bottom, the contact protrusion is at least partially located in the plug guide receiving cavity. The contact protrusion is in electrical contact with the plug reinforcement. The transmission of current includes the following two paths: one is along the contact protrusion, the hanging part, the contact sheet, and the welding foot at the bottom of the longitudinal peripheral wall covering part; the other is along the contact protrusion, the elastic main body arm, the tensioning part, and the welding foot at the bottom of the longitudinal peripheral wall covering part. The parallel transmission of the two current transmission paths can effectively reduce the temperature rise.

[0010] Preferably, the top end of the transverse outer peripheral wall covering portion is bent toward the plug guide receiving cavity to form a protective portion supported on the supporting shoulder.

[0011] Preferably, a high platform is formed on the top of the supporting shoulder near the connecting step portion, and a low groove adjacent to the high platform is also formed on the top of the supporting shoulder, the protecting portion is supported on the high platform, and the hanging portion is supported in the low groove.

[0012] Preferably, the horizontal position of the surface of the low-level groove is lower than the horizontal position of the surface of the high-level platform, and the upper surface of the hanging part is lower than the upper surface of the protecting part.

[0013] Preferably, when the plug is not plugged in, viewed from top to bottom, the free end of the protective portion does not cover the elastic main body arm, and after the plug is inserted into the socket, the protective portion at least partially covers the elastic main body arm.

[0014] Preferably, two lateral ends of the island portion are provided with protected portions whose horizontal position is lower than that of the island portion, and the socket reinforcement member further comprises a central guide portion which is bent downward from the lateral inner side of the main body portion and extends to and covers the protected portion.

[0015] Preferably, the socket reinforcement further comprises a longitudinal peripheral wall covering portion which is bent downward from the transverse outer side of the main body portion and covers the longitudinal peripheral wall, and the bottom of the longitudinal peripheral wall covering portion is fixed as a welding foot.

[0016] Preferably, the plug guide receiving cavity forms a through opening between the protected portion and the longitudinal outer peripheral wall, and the central guide portion includes a first central guide arm bent downward from the lateral inner side of the main body and extending on the inner side surface of the longitudinal outer peripheral wall, a supporting bottom arm bent from the first central guide arm and extending along the through opening to the bottom of the protected portion, and a second central guide arm bent from the supporting bottom arm and extending along the protected portion.

[0017] Preferably, the protected portion includes a table portion whose horizontal plane is lower than that of the island portion, an avoidance slope formed by slanting downward from the table portion, and a slot formed by being recessed downward from the table portion, and the second central guide arm extends obliquely upward along the avoidance slope, and the end of the second central guide portion is bent downward to form a snap-in end portion that is snapped into the slot.

[0018] Preferably, the plug reinforcement is guided by the first and second central guide arms and enters between the first and second central guide arms above the support bottom arm. During the insertion process, the support bottom arm is compressed to generate a supporting force so that the first and second central guide arms have a certain elasticity. When the plug is fully inserted, the first and second central guides do not have electrical contact with the plug reinforcement.

[0019] The present application forms a hanging portion that is hung on the supporting shoulder by bending and extending the elastic main body arm toward the longitudinal outside, and forms a protective portion that is higher than the hanging portion by bending the top of the transverse peripheral wall covering portion toward the longitudinal inside, so as to protect the elastic main body arm from being damaged by the plug reinforcement member rubbing downward when the plug is inserted. At the same time, when the hanging portion is squeezed in the longitudinal direction, the hanging portion is electrically contacted with the longitudinal peripheral wall covering portion to conduct the current to the welding foot at the bottom of the longitudinal peripheral wall covering portion, so as to realize multi-path parallel transmission and reduce temperature rise. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0021] Figures 1 to 15 The following are the drawings of the specification of the first embodiment of the board-to-board connector assembly of the present application:

[0022] Figure 1 It is a combined diagram of a board-to-board connector assembly of Embodiment 1;

[0023] Figure 2 For along Figure 1 A cross-sectional view taken along the dashed line AA shown;

[0024] Figure 3It is a three-dimensional assembly diagram of a board-to-board plug in the first embodiment;

[0025] Figure 4 A three-dimensional diagram of a plug body of a board-to-board plug of Example 1 and a partial enlarged diagram thereof;

[0026] Figure 5 is a three-dimensional diagram of a plug reinforcement member of a board-to-board plug in accordance with the first embodiment;

[0027] Figure 6 A three-dimensional view of the plug reinforcement member of the board-to-board plug of the first embodiment from another angle;

[0028] Figure 7 It is a three-dimensional assembly diagram of the board-to-board socket of the first embodiment;

[0029] Figure 8 It is a three-dimensional diagram of the socket body of the board-to-board socket of the first embodiment and a partial enlarged diagram thereof;

[0030] Fig. 9 It is a three-dimensional diagram of a socket reinforcement member of a board-to-board socket in Embodiment 1;

[0031] Fig.10 A three-dimensional view of the socket reinforcement member of the board-to-board socket of the first embodiment from another angle;

[0032] Fig.11 It is a top view of a socket reinforcement member of a board-to-board socket in Embodiment 1;

[0033] Fig.12 A left or right view of a socket reinforcement member of a board-to-board socket in Embodiment 1;

[0034] Fig.13 It is a side view of a socket reinforcement member of a board-to-board socket in Embodiment 1;

[0035] Fig.14 For along Figure 1 A cross-sectional view taken along the dashed line BB shown;

[0036] Fig.15 For along Figure 1 A partial cross-sectional view taken along the CC dashed line is shown.

[0037] Figures 16 to 18 The following are the drawings of the specification of the second embodiment of the board-to-board connector assembly of the present application:

[0038] Fig.16 It is a partial three-dimensional diagram of the board-to-board socket of the second embodiment;

[0039] Fig.17 It is a three-dimensional diagram of a socket reinforcement member of a board-to-board socket of Embodiment 2;

[0040] Fig.18It is a side view of the socket reinforcement member of the board-to-board socket of the second embodiment.

[0041] Figures 19 to 25 The following are the drawings of the specification of the third embodiment of the board-to-board connector assembly of the present application:

[0042] Fig.19 A three-dimensional diagram of the board-to-board socket of Example 3 and a partial enlarged diagram thereof;

[0043] Fig. 20 It is a partial enlarged view of the socket body of the board-to-board socket of the third embodiment;

[0044] Fig.21 It is a three-dimensional diagram of a socket reinforcement member of a board-to-board socket of Example 3;

[0045] Fig. 22 A three-dimensional view of the socket reinforcement member of the board-to-board socket of the third embodiment from another angle;

[0046] Fig.23 It is a side view of the socket reinforcement member of the board-to-board socket of the third embodiment;

[0047] Fig.24 It is a front or rear view of a socket reinforcement member of a board-to-board socket of Embodiment 3;

[0048] Fig.25 It is a top view of the socket reinforcement member of the board-to-board socket of the third embodiment. DETAILED DESCRIPTION

[0049] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with the specific embodiments of the present application and the corresponding drawings.

[0050] The directions of this application are defined as Figure 1 The X direction is the right side of the left-right direction (or the lateral direction), the Y direction is the front side of the front-back direction (or the longitudinal direction), and the Z direction is the top side of the up-down direction (ie, the vertical direction).

[0051] Embodiment 1

[0052] See also Figure 1 As shown, the board-to-board connector assembly of the present application includes a plug A mounted on a printed circuit board and a socket B mounted on another printed circuit board, and the plug A and the socket B are interlocked and connected.

[0053] The plug A includes a plug body 10, a plurality of plug terminals 20 formed in the plug body 10, and a plug reinforcement 30 fixed to both lateral ends of the plug body 10. The socket B includes a socket body 40, socket terminals 50 mounted on the socket body 40, and a socket reinforcement 60 mounted and fixed to both lateral ends of the socket body 40.

[0054] See also Figures 2 to 6 As shown, the plug body 10 of the plug A includes a top wall 11, a pair of plug side walls 12 extending downward from the longitudinal sides of the top wall 11, a plug guide portion 14 formed at the lateral ends of the plug body 10, and an island receiving cavity 13 formed between the top wall 11, the pair of plug side walls 12 and the plug guide portion 14.

[0055] The plug terminals 20 are formed in two rows in the transverse direction and are integrally formed on a pair of plug side walls 12. The plug guide portion 14 includes a bottom surface 141, a longitudinal outer side surface 142, a pair of transverse outer side surfaces 143, and an inclined surface 144 facing the island receiving cavity 13. The longitudinal outer side surface 142 is provided with a first notch 1421, and the transverse outer side surface 143 includes two longitudinally protruding protrusions 1431, 1432, a second notch 1433 located between the two protrusions 1431, 1432, and a third notch 1434 located between the protrusion 1432 and the plug side wall 12. The inclined surface 144 is formed with an inclined surface 1441 extending upward from the bottom surface 141 to the top wall 11 and a clamping hole 1442 formed by being recessed upward from the inclined surface 1441 on a side close to the bottom surface 141.

[0056] The plug reinforcement member 30 includes a covering base 31 covering the bottom surface 141 of the plug guide 14 in the longitudinal direction, a longitudinal outer side covering portion 35 and a longitudinal inner side covering portion 34 formed by bending upward from the transverse ends of the covering base 31 to respectively cover the longitudinal outer side 142 and snap into the snap hole 1442, and a transverse outer side covering portion 33 formed by bending upward from the longitudinal ends of the covering base 31 to cover the outside of the transverse outer side 143 in the transverse direction. The longitudinal outer side covering portion 35 snaps into the first notch 1421.

[0057] The lateral outer side covering portion 33 includes a contact portion 331 that is inserted into the second notch 1433, and a welding foot 332 that is vertically bent toward the longitudinal outer side from the top of one end of the lateral outer side covering portion 33 away from the longitudinal outer side covering portion 35. The contact portion 331 of the lateral outer side covering portion 33 is inserted into the second notch 1433, and the welding foot 332 is formed by inserting into the third notch 1434 and then vertically bending toward the longitudinal outer side. A snap-on slot 333 is also provided on the lateral outer side covering portion 33 to insert into the outer periphery of the protrusion 1432 to enhance the holding force between the plug reinforcement 30 and the plug guide portion 14.

[0058] Key References Figure 2 As shown, the plug terminal 20 includes a plug terminal solder leg 24 extending from the upper surface of the top wall 11 in the longitudinal direction outside the top wall 11, a plug terminal first contact portion 22 bent from the plug terminal solder leg 24 along the surface of the top wall 11 to the inner side surface of the plug side wall 12, and a plug terminal second contact portion 23 bent reversely from the lower end of the plug terminal first contact portion 22 and extending to the outer side surface of the plug side wall 12. A groove structure is provided on the plug terminal second contact portion 23.

[0059] Please continue reading Figure 1 , Figure 2 , Figure 7 , Figure 8 As shown, the socket body 40 of the socket B of the board-to-board connector assembly of the present application includes a bottom wall 41, a pair of socket side walls 42 extending upward from the longitudinal sides of the bottom wall 41, an island portion 45 protruding upward from the bottom wall 41 and located between the pair of socket side walls 42, a socket guide portion 44 formed at the lateral ends of the socket body 40, and a plug side wall receiving cavity 43 formed between the island portion 45 and the pair of socket side walls 42.

[0060] The bottom wall of the socket body 40 is provided with a plurality of terminal grooves 46 from bottom to top, and the socket terminal 50 is assembled upward in the terminal grooves 46, and the socket terminal 50 includes a support arm portion 51 extending in the terminal groove 46 at the bottom wall 41 and exposed at the bottom of the terminal groove 46, a second contact portion 52 of the socket terminal bent upward from the longitudinal outer side of the support arm portion 51 and extending to form a longitudinal side surface of the island portion 45 and facing the socket side wall 42, a first contact portion 53 of the socket terminal bent upward from the longitudinal inner side of the support arm portion 51 and located on the longitudinal side surface of the socket side wall 42, a retaining portion 54 formed by reverse bending and extending from the top end of the first contact portion 53, and a welding foot 55 vertically bent from the lower end of the retaining portion 54 and extending longitudinally outward to the lower surface of the bottom wall 41 of the socket body 40.

[0061] When the plug A is mated with the socket B, the island portion 45 is received in the island portion receiving cavity 13 of the plug A, the plug side wall 12 of the plug A is received in the plug side wall receiving cavity 43 of the socket B, and the plug guide portion 14 is guided into the socket guide portion 44. The plug terminal 20 is inserted between the first and second contact portions 53, 52 of the socket terminal 50, and the first and second contact portions 22, 23 of the plug terminal 20 are in electrical contact with the first and second contact portions 53, 52 of the socket terminal 50, respectively.

[0062] Key References Figure 8 As shown, protected portions 451 are provided at both lateral ends of the island portion 45 toward the socket guide portion 44, and the protected portion 451 includes a table portion 453 whose horizontal plane is lower than that of the island portion 45, an avoidance slope 452 formed by slanting downward from the table portion 453, a groove 454 formed by being recessed downward from the table portion 453, and a connecting groove 455 opened from the groove 454 to the lateral outside and connected to the avoidance slope 452.

[0063] The socket guide 44 includes peripheral walls 441, 442 and a plug guide receiving cavity 443 located between the peripheral walls 441, 442. The peripheral walls 441, 442 include a longitudinal peripheral wall 441 and a pair of transverse peripheral walls 442 connected to both ends of the longitudinal peripheral wall 441, and the transverse peripheral walls 442 are connected to the socket side wall 42.

[0064] The plug guide receiving cavity 443 corresponds to the lateral extension of the island 45 and forms a through hole 4431 that penetrates in the up-down direction. The through hole 4431 extends all the way to the lower end of the longitudinal peripheral wall 441. The lateral outer side and inner side of the longitudinal peripheral wall 441 are respectively provided with a first and a second extension groove 4411, 4412, and the second extension groove 4412 is connected to the through hole 4431. The middle of the longitudinal peripheral wall 441 protrudes upward to form a support shoulder 4421, and the outer periphery of the support shoulder 4421 is respectively provided with a mounting step 4425 located on the longitudinal outer side of the support shoulder 4421 and extending in the lateral direction, a connecting step 4426 that separates the support shoulder 4421 from the socket side wall 42, and an elastic avoidance portion 4424 located on the longitudinal inner side of the support shoulder 4421 and extending in the lateral direction. The installation step portion 4425, the connecting step portion 4426 and the elastic avoidance portion 4424 are connected to each other to form a U-shaped step portion. The top surface of the support shoulder 4421 is respectively provided with a low-level groove 4423 and a high-level platform 4422, wherein the low-level groove 4423 is close to one side of the longitudinal peripheral wall 441, and the high-level platform 4422 is close to the connecting step portion 4426, and the horizontal position of the top surface of the high-level platform 4422 is higher than the horizontal position of the surface of the low-level groove 4423. The installation step portion 4425 is partially penetrated in the vertical direction to form a third extension groove 4428.

[0065] Please continue reading Figures 9 to 13 As shown, the socket reinforcement 60 includes a main body portion 61 covering the top surface of the longitudinal outer wall 441 along the longitudinal direction, a longitudinal outer wall covering portion 62 bent downward from the lateral outer end of the main body portion 61 and extending into the first extension groove 4411, a central guide portion 63 bent downward from the lateral inner side of the main body portion 61 and extending to the protected portion 451 on the lateral end of the island portion 45, a lateral outer wall covering portion 64 bent downward from the longitudinal ends of the main body portion 61 and extending along the installation step portion 4425 to form a longitudinal outer side of the lateral outer wall 442, and an elastic arm portion 65 bent reversely from the free end of the lateral outer wall covering portion 64 and extending through the connecting step portion 4426 to the elastic avoidance portion 4424. The elastic arm portion 65 can be bent from either end of the transverse ends of the transverse peripheral wall covering portion 64 and extend to the elastic avoidance portion 4424. At the same time, in another embodiment, the elastic arm portion 65 can also be bent downward from the longitudinal ends of the transverse outer side of the main body portion 61 and then extend to the elastic avoidance portion 4424.

[0066] The free end of the longitudinal peripheral wall covering portion 62 is fixed to the printed circuit board as a soldering foot, and the bottom end of the transverse peripheral wall covering portion 64 is extended to the printed circuit board through the third extension groove 4428 as a soldering foot and is soldered and fixed. The main body 61 is folded downward toward the plug guide receiving cavity 443 on both sides of the central guide portion 63 to form a first and a second arc surface guide portion 611, 612, and the first arc surface guide portion 611 is consistent with the guide arc surface 636 formed by the central guide portion 63 bending downward from the main body 61.

[0067] The central guide portion 63 includes a first central guide arm 631 that is bent downward from the lateral inner side of the main body 61 and extends into the second extension groove 4412, a support bottom arm 632 that is bent horizontally from the bottom of the first central guide arm 631 and extends along the through hole 4431 to the bottom of the protected portion 451 on both sides of the island 45, a second central guide arm 634 that extends obliquely upward from the support bottom arm 632 to the top of the protected portion 451, and a snap-in end portion 635 that is bent downward from the free end of the second central guide arm 634 and snap-into the snap-in groove 454. The first and second central guide arms 631, 634 are used to guide the insertion of the plug reinforcement 30 and protect the longitudinal peripheral wall 441 of the socket body 40 and the protected portion 451 at both lateral ends of the island 45. The longitudinal outer side covering portion 35 and the longitudinal inner side covering portion 34 of the plug reinforcement member 30 are respectively guided by the first and second central guide arms 631, 634 and enter between the first and second central guide arms 631, 634 above the support bottom arm 632, but in the inserted state, the longitudinal outer side covering portion 35 and the longitudinal inner side covering portion 34 do not make electrical contact with the first and second central guide arms 631, 634. During the insertion process, the support bottom arm 632 is pressed to generate a supporting force with the mounted printed circuit board, so that the first and second central guide arms 631, 634 have a certain elasticity.

[0068] The top of the transverse peripheral wall covering portion 64 is bent and extended toward the elastic arm portion 65 to form a protection portion 66 supported above the high platform 4422 of the support shoulder 4421. When the plug A is not inserted into the socket B, that is, the socket B is in a natural state, when viewed from top to bottom (i.e. Fig.11 As shown in the figure, the protective portion 66 does not cover the elastic arm portion 65. When the elastic arm portion 65 is squeezed longitudinally outward by the contact portion 331 of the lateral outer side covering portion 33 of the plug reinforcement 30, the elastic arm portion 65 is at least partially located below the protective portion 66.

[0069] In a natural state, the elastic arm portion 65 is located above the elastic avoidance portion 4424 and there is a deformation gap between the elastic arm portion 65 and the inner side surface of the support shoulder portion 4421. When the elastic arm portion 65 is longitudinally squeezed, the elastic arm portion 65 is deformed in the deformation gap. The elastic arm portion 65 includes a tensioning portion 651 formed by reverse bending from the free end of the transverse direction of the transverse peripheral wall covering portion 64, an elastic main body arm 652 extending from the tensioning portion 651 to the elastic avoidance portion 4424 in the transverse direction, a contact convex portion 653 protruding from the elastic main body arm 652 toward the plug guide receiving cavity 443, and a hanging portion 654 formed by bending and extending from the top end of the elastic main body arm 652 toward the transverse peripheral wall covering portion 64. The hanging portion 654 is supported above the low-position groove 4423 of the support shoulder portion 4421. The arc line of the bent portion of the hanging portion 654 is consistent with the second arc guide portion 612 on the main body 61.

[0070] Key References Fig.14 As shown, the horizontal position of the top surface of the protection portion 66 is higher than the horizontal position of the top surface of the hanging portion 654 (focus on Fig.13 ), the top surface of the hanging portion 654 is at the same horizontal position as the top surface of the main body 61. When viewed from the side (such as Fig.12 As shown in FIG. 4 , the contact protrusion 653 is completely located in the plug guide receiving cavity 443. When the plug A is inserted, the lateral outer side cover 33 of the plug reinforcement 30 first contacts the protection portion 66 and obtains the correct position of the protection portion 66 toward the side of the plug guide receiving cavity 433, and then continues to press down. The plug reinforcement 30 presses the elastic main body arm 652 toward the longitudinal outer side along the inner edge of the hanging portion 654. The hanging portion 654 keeps the elastic main body arm 652 from being damaged by being rubbed, hung, and folded downward. After the plug A is finally inserted, the elastic main body arm 652 is squeezed and deformed toward the support shoulder 4421 and provides elastic force. The contact protrusion 653 finally achieves electrical contact with the contact portion 331 of the plug reinforcement 30 to transmit current. The plug reinforcement 30 and the socket reinforcement 60 transmit current by electrically contacting the two contact portions 331 in the longitudinal direction with the two contact protrusions 653, and the current transmission capacity can reach 5 amperes.

[0071] The elasticity of the elastic main body arm 652 is preferably such that the longitudinal movement of the hanging portion 654 does not exceed the longitudinal outer side surface of the transverse peripheral wall covering portion 64. The transverse peripheral wall covering portion 64 is provided with a avoiding notch 643 at a position corresponding to the hanging portion 654 in the longitudinal direction. When the plug A is inserted, the hanging portion 654 extends to the upper side of the avoiding notch 643 on the transverse peripheral wall covering portion 64 without contacting it.

[0072] In this embodiment, the elastic main body arm 652 is bent and extended toward the longitudinal outside to form a hanging portion 654 that is hung on the support shoulder 4421, and the top of the transverse outer wall covering portion 64 is bent toward the longitudinal inside to form a protective portion 66 higher than the hanging portion 654, so as to protect the elastic main body arm 652 from being damaged by the plug reinforcement member 30 rubbing downward when the plug is inserted.

[0073] Embodiment 2

[0074] Please continue reading Figures 16 to 18 As shown, it is a second embodiment of the board-to-board connector assembly of the present application. The board-to-board plug A of this embodiment is consistent with the first embodiment, and the difference only lies in the partial structure of the socket reinforcement member 60.

[0075] The difference between the second embodiment and the first embodiment is that the position of the transverse peripheral wall covering portion 64 corresponding to the hanging portion 654 cancels the avoidance notch 643 in the first embodiment, and the position of the transverse peripheral wall covering portion 64 corresponding to the hanging portion 654 protrudes upward to form a contact piece 644, and the free end of the hanging portion 654 is stamped into a smaller contact tip. When the plug A is inserted into the socket B, the elastic main body arm 652 deforms toward the longitudinal outside to force the contact tip 655 of the hanging portion 654 to extend toward the contact piece 644 and finally make electrical contact. In this way, the current can be directly transmitted to the contact piece 644 on the transverse peripheral wall covering portion 64 through the contact portion 331 of the plug reinforcement 30 via the contact protrusion 653 of the socket reinforcement 60, and finally transmitted to the printed circuit board through the solder foot 642 at the bottom of the transverse peripheral wall covering portion 64. This transmission path is defined as the first transmission path. Therefore, the current does not need to be transmitted through the path of the contact protrusion 653, the elastic main body arm 652, the tightening part 651, and the transverse peripheral wall covering part 64. This transmission path is defined as the second transmission path. In this way, multi-path parallel transmission between the plug A and the socket B is achieved, heat generation is reduced, and current carrying capacity is improved.

[0076] The contact piece 644 preferably extends upwards to a length that does not exceed the upper surface of the main body 61 and the protection portion 66. The contact piece 644 is retained to have the ability to deform outward in the longitudinal direction to protect the hook portion 654 and the contact piece 644 from being damaged due to mis-insertion.

[0077] In the second embodiment, a contact piece 644 is formed by extending upward at the position of the transverse peripheral wall covering portion 64 corresponding to the hanging portion 654, so that when the elastic main arm 652 is deformed longitudinally outward when the plug A is inserted, the free end of the hanging portion 654 electrically contacts the contact piece 644, thereby realizing multi-path current transmission, which is beneficial to improving the current carrying capacity of the socket reinforcement 60.

[0078] During the simulated temperature rise test, when the current passing through the embodiment 1 and the embodiment 2 was 5 amperes, the temperature rise of the embodiment 1 was 20.4 degrees Celsius, and the temperature rise of the embodiment 2 was 17.4 degrees Celsius.

[0079] Embodiment 3

[0080] See also Figures 19 to 25 As shown, the plug A of the third embodiment is consistent with that of the first embodiment, but the difference of the socket B is that the socket guide portion 44 is partially different and the structure of the socket reinforcement member 60 is inconsistent.

[0081] The support shoulder 4421 of the socket guide 44 of the socket body 40 of the third embodiment is formed with avoidance slopes 4429 on both sides in the longitudinal direction, so that the top of the support shoulder 4421 is a relatively sharp support top, and the installation step 4425 and the elastic avoidance portion 4424 no longer need to be connected through the connecting step 4426, that is, the connecting step 4426 is cancelled. The rest of the structure of the socket guide 44 is consistent with that of the first embodiment.

[0082] The socket reinforcement member 60 of the third embodiment includes the main body 61, the central guide portion 63, the longitudinal peripheral wall covering portion 62 and the transverse peripheral wall covering portion 64 as in the first embodiment, and further includes a protection arm 68 and a contact spring arm 69 formed by folding inward and downward from the top end of the transverse peripheral wall covering portion 64.

[0083] The protective arm 68 is formed by bending and extending longitudinally downward from the top of the free end of the transverse peripheral wall covering portion 64, and the contact elastic arm 69 is formed by bending and extending longitudinally downward from the top of the transverse peripheral wall covering portion 64 located between the protective arm 68 and the main body 61.

[0084] The protection arm 68 includes a bending protection portion 681 that is bent from the top of the transverse peripheral wall covering portion 64 toward the longitudinal inner side and crosses the support shoulder 4421, a first extension protection portion 682 that extends obliquely downward from the bending protection portion 681, and a second extension protection portion 683 that continues to extend obliquely downward from the first extension protection portion 682 and is located above the elastic avoidance portion 4424. The extension angles of the first extension protection portion 682 and the second extension protection portion 683 are inconsistent, and the extension angle of the first extension protection portion 682 is greater than the extension angle of the second extension protection portion 683, that is, the first extension protection portion 682 is closer to the plug guide receiving cavity 443 faster than the second extension protection portion 683 with a shorter extension length. The extension angles here are defined as the angles between the first and second extension protection portions 682, 683 and the vertical direction. The first extension protection portion 682 also extends away from the main body 61.

[0085] The contact spring arm 69 includes a bent spanning portion 691 bent from the top of the transverse peripheral wall covering portion 64 toward the longitudinal inner side and spanning the support shoulder 4421, an extension arm 692 extending obliquely downward from the bent spanning portion 691, and a contact portion 693 extending obliquely downward from the extension arm 692, which is at least partially located in the plug guide receiving cavity 443. The extension angles of the extension arm 692 and the contact portion 693 are inconsistent, and the extension angle of the extension arm 692 is smaller than the extension angle of the contact portion 693, that is, the extension arm 692 approaches the plug guide receiving cavity 443 more slowly with a shorter extension length than the contact portion 693. The extension arm 692 and the contact portion 693 extend obliquely toward the direction of the protection arm 68.

[0086] At the same time, the extension angle of the extension arm 692 is smaller than the extension angle of the first extension protection portion 682 so that the first extension protection portion 682 is closer to the plug guide receiving cavity 443. The extension angle of the contact portion 693 is larger than the extension angle of the second extension protection portion 683 so that the contact portion 693 is closer to or enters the plug guide receiving cavity 443. When the plug A is not inserted, when viewed from top to bottom, the free end of the contact portion 693 is entirely or at least partially located in the plug guide receiving cavity 443, and the free end of the second extension protection portion 683 of the protection arm 68 is entirely or at least partially located above the elastic avoidance portion 4424.

[0087] The horizontal position of the top of the bending spanning portion 691 is not higher than the top of the bending protection portion 681 of the protection arm 68 , and preferably, the top of the bending spanning portion 691 is lower than the top of the bending protection portion 681 .

[0088] During the process of inserting the plug A into the socket B, the joint end edge of the lateral outer side cover portion 33 of the plug reinforcement member 30 and the cover base 31 is first guided by the bent protection portion 681 of the protection arm 68, and is continuously pressed down along the bent protection portion 681 until it is guided by the first extended protection portion 682. At this time, the extended arm 692 of the contact spring arm 69 is away from the plug guide receiving cavity 433 relative to the first extended protection portion 682, and the extended arm 692 does not need to guide the plug reinforcement member 30. After the plug reinforcement member 30 is guided by the first extended protection portion 682, the insertion position of the plug A is basically unchanged, and the guiding effect of the second extended protection portion 683 is weakened. If the pressure is continued downward, the contact portion 331 of the lateral outer side cover portion 33 will be in elastic contact with the contact portion 693. After the plug A is buckled, the contact spring arm 69 is deformed on the elastic avoidance portion 4424 toward the support shoulder 4421, and the contact portion 693 is at least partially pressed above the elastic avoidance portion 4424. The protection arm 68 will no longer come into contact with the plug reinforcement member 30. The current is transmitted to the printed circuit board via the contact portion 331 of the plug reinforcement member 30, the contact spring arm 69, and the longitudinal peripheral wall covering portion 62.

[0089] The avoidance slopes 4429 on both longitudinal sides of the top of the supporting shoulder 4421 allow the protection arm 68 and the bending protection portion 681 and the bending span portion 691 of the contact elastic arm 69 to bend at a smaller angle and be in a supported state of the supporting shoulder 4421 .

[0090] The board-to-board connector assembly of this embodiment is formed by bending inwardly at the top of the lateral peripheral wall covering portion 64 of the socket reinforcement member 60 to form a protective arm 68 and a contact spring arm 69 for guiding and electrically connecting respectively. The protective arm 68 guides and protects the insertion of the plug reinforcement member 30 without damaging the socket B or the plug.

[0091] It should be noted that the printed circuit board on which the plug A or the socket B is mounted in this specification is not limited to a circuit board, and any object having a current transmission line can be used.

[0092] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A board-to-board connector assembly, comprising a socket and a plug mating with the socket, the plug comprising a plug body, a plug terminal and a plug reinforcement, the plug body comprising a top wall, a plug side wall extending downward from both longitudinal ends of the top wall, a plug guide formed at both transverse ends of the plug body, and an island receiving cavity located between the plug side wall and the plug guide, the socket comprising a socket body, a socket terminal and a socket reinforcement, the socket body comprising a bottom wall, a socket side wall protruding upward from both longitudinal ends of the bottom wall, a socket guide formed at both transverse ends of the socket body, an island protruding upward from the bottom wall, and a plug side wall receiving cavity formed between the island and the socket side wall, characterized in that The socket guide portion includes a plug guide portion receiving cavity, a longitudinal peripheral wall located on the transverse outer side of the plug guide portion receiving cavity, and a pair of transverse peripheral walls located on both longitudinal sides of the plug guide portion receiving cavity. The socket reinforcement member includes a main body portion covering the surface of the longitudinal peripheral wall, a transverse peripheral wall covering portion extending from both longitudinal sides of the main body portion in the transverse direction and covering the outside of the transverse peripheral wall, and an elastic arm portion extending from the transverse peripheral wall covering portion to the transverse peripheral wall near the plug guide portion receiving cavity. The top of the elastic arm portion is bent and extended toward the longitudinal outer side to form a hanging portion hung on the top surface of the transverse peripheral wall. A contact piece is formed on the longitudinal peripheral wall covering portion at a position corresponding to the hanging portion. When the plug and the socket are matched, the plug reinforcement member squeezes the elastic arm portion along the longitudinal outer side and forces the hanging portion to move toward the longitudinal outer side to electrically contact the contact piece. At the same time, the plug reinforcement member is electrically in contact with the elastic arm portion.

2. The board-to-board connector assembly according to claim 1, wherein: The bottom of the longitudinal peripheral wall covering portion is fixed on the printed circuit board as a welding foot, and the current is transmitted from the plug reinforcement to the welding foot of the longitudinal peripheral wall covering portion through the hanging portion.

3. The board-to-board connector assembly according to claim 2, wherein: The transverse peripheral wall of the socket body includes a supporting shoulder and an elastic avoidance portion located at the longitudinal inner side of the supporting shoulder and connected to the plug guide receiving cavity. The elastic arm portion can generate elastic deformation in the longitudinal direction of the elastic avoidance portion.

4. The board-to-board connector assembly according to claim 3, wherein: A mounting step portion is formed on the longitudinal outer side of the supporting shoulder portion, and the transverse peripheral wall covering portion extends onto the mounting step portion.

5. The board-to-board connector assembly according to claim 3, wherein: The supporting shoulder portion is formed with a connecting step portion connected to the elastic avoidance portion at least at one end in the transverse direction, the elastic arm portion includes a tensioning portion bent from one transverse end of the transverse outer wall covering portion and extending on the connecting step portion, and an elastic main body arm extending at least partially from the tensioning portion in the transverse direction to the elastic avoidance portion, and the hanging portion is bent outwardly along the longitudinal direction from the top end of the elastic main body arm and hung above the supporting shoulder portion.

6. The board-to-board connector assembly according to claim 5, wherein: The elastic main body arm protrudes toward the plug guide receiving cavity to form a contact protrusion. When viewed from top to bottom, the contact protrusion is at least partially located in the plug guide receiving cavity. The contact protrusion is in electrical contact with the plug reinforcement. The transmission of current includes the following two paths: one is along the contact protrusion, the hanging part, the contact sheet, and the welding foot at the bottom of the longitudinal peripheral wall covering part; the other is along the contact protrusion, the elastic main body arm, the tensioning part, and the welding foot at the bottom of the longitudinal peripheral wall covering part. The parallel transmission of the two current transmission paths can effectively reduce the temperature rise.

7. The board-to-board connector assembly according to claim 5, wherein: The top end of the transverse outer peripheral wall covering portion is bent toward the receiving cavity of the plug guide portion to form a protecting portion supported on the supporting shoulder.

8. The board-to-board connector assembly according to claim 7, wherein: A high platform is formed on the top of the supporting shoulder near the connecting step portion, and a low groove adjacent to the high platform is also formed on the top of the supporting shoulder. The protecting portion is supported on the high platform, and the hanging portion is supported in the low groove.

9. The board-to-board connector assembly according to claim 8, wherein: The horizontal position of the surface of the low-level groove is lower than the horizontal position of the surface of the high-level platform, and the upper surface of the hanging part is lower than the upper surface of the protecting part.

10. The board-to-board connector assembly according to claim 9, wherein: When the plug is not plugged in, when viewed from top to bottom, the free end of the protective portion does not cover the elastic main body arm. After the plug is inserted into the socket, the protective portion at least partially covers the elastic main body arm.

11. The board-to-board connector assembly according to claim 1, wherein: The two lateral ends of the island portion are provided with protected portions at a lower level than the island portion, and the socket reinforcement member further comprises a central guide portion which is bent downward from the lateral inner side of the main body portion and extends to and covers the protected portion.

12. The board-to-board connector assembly according to claim 11, wherein: The socket reinforcement also includes a longitudinal peripheral wall covering portion that is bent downward from the transverse outer side of the main body and covers the longitudinal peripheral wall, and the bottom of the longitudinal peripheral wall covering portion is fixed as a welding foot.

13. The board-to-board connector assembly according to claim 11, wherein: The plug guide receiving cavity forms a through opening between the protected portion and the longitudinal outer peripheral wall, and the central guide portion includes a first central guide arm that is bent downward from the lateral inner side of the main body and extends on the inner side of the longitudinal outer peripheral wall, a supporting bottom arm that is bent from the first central guide arm and extends along the through opening to the bottom of the protected portion, and a second central guide arm that is bent from the supporting bottom arm and extends along the protected portion.

14. The board-to-board connector assembly according to claim 13, wherein: The protected portion includes a table portion whose horizontal plane is lower than that of the island portion, an avoidance slope formed by slanting downward from the table portion, and a slot formed by being recessed downward from the table portion. The second central guide arm extends obliquely upward along the avoidance slope, and the end of the second central guide arm is bent downward to form a snap-in end portion that is snapped into the slot.

15. The board-to-board connector assembly according to claim 14, wherein: The plug reinforcement is guided by the first and second central guide arms and enters between the first and second central guide arms above the support bottom arm. During the insertion process, the support bottom arm is compressed to generate a supporting force so that the first and second central guide arms have a certain elasticity. When the plug is fully inserted, the first and second central guide arms are in electrical contact with the plug reinforcement.

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