CN111355061B

CN111355061B - Board-to-Board Sockets

Info

Publication number: CN111355061B
Application number: CN202010176129.3A
Authority: CN
Inventors: 黎英岳; 彭鑫云; 李亚勇
Original assignee: Shenzhen Everwin Precision Technology Co Ltd
Current assignee: Shenzhen Everwin Precision Technology Co Ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2025-01-28
Anticipated expiration: 2040-03-13
Also published as: CN111355061A

Abstract

A board-to-board 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 the two longitudinal ends of the bottom wall, a socket guide formed at the two transverse ends of the socket body and an island protruding upward from the bottom wall, the socket guide comprising a plug guide receiving cavity, a longitudinal peripheral wall located on the transverse outside of the plug guide receiving cavity and a pair of transverse peripheral walls located on both longitudinal sides of the plug guide receiving cavity, the socket reinforcement comprising a main body covering the upper surface of the longitudinal peripheral wall, a transverse peripheral wall covering portion extending from the main body to cover and cover 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 side of the plug guide receiving cavity, the top of the elastic arm portion being bent and extended toward the longitudinal outside to form a hanging portion cavity hung on the top surface of the transverse peripheral wall.

Description

Board-to-board socket

Technical Field

The present application relates to the field of electrical connectors, and more particularly to a board-to-board socket.

Background

Board-to-board connector assemblies are widely used in consumer electronics applications such as smartphones, tablet computers, wearable devices, etc. The current smart phone and the wearable equipment are extremely high in space requirements, the sizes of components are also reduced, the lowest height of a wire board to board manufacturer after the board to board plug is matched with a socket is 0.6mm, the distance between terminals is 0.25mm, the connector is tiny, high requirements are provided for the structural strength of the connector, and compared with the traditional board to board connector assembly, the current smart phone is integrated in large-scale functions, high requirements are provided for current carrying capacity, such as the carrying capacity of a liquid crystal screen and the like for current transmission, and the design of the traditional board to board connector assembly cannot adapt to the requirements of the current market for strength and current transmission.

Disclosure of Invention

In view of the above, it is necessary to provide a board-to-board socket, which meets the requirements of the product for light and thin weight, better strength and high current transmission.

In order to solve the technical problems, the application provides a board-to-board socket, which comprises a socket body, socket terminals and a socket reinforcement, wherein the socket body comprises a bottom wall, socket side walls formed by protruding upwards from two longitudinal ends of the bottom wall, socket guide parts formed at two transverse ends of the socket body and elastic arm parts formed by protruding upwards from the bottom wall, each socket guide part comprises a plug guide part receiving cavity, a longitudinal peripheral wall positioned at the transverse outer side of the plug guide part receiving cavity and a pair of transverse peripheral walls positioned at the two longitudinal sides of the plug guide part receiving cavity, the socket reinforcement comprises a main body part covered on the upper surface of the longitudinal peripheral wall, a transverse peripheral wall covering part downwards bent from two longitudinal sides of the main body part and extending in the transverse direction to cover the outer side of the transverse peripheral wall, and an elastic arm part extending from the transverse peripheral wall covering part to the side of the transverse peripheral wall close to the plug guide part receiving cavity, and the top of the elastic arm part is bent towards the longitudinal outer side to form a hanging part hung on the top surface of the transverse peripheral wall.

Preferably, the lateral peripheral wall of the socket body includes a support shoulder and an elastic avoidance portion located at the inner side of the support shoulder in the longitudinal direction and communicated with the plug guide portion receiving cavity, and the elastic arm portion is capable of elastically deforming in the longitudinal direction of the elastic avoidance portion.

Preferably, a mounting step portion is formed on a longitudinally outer side of the support shoulder portion, and the lateral peripheral wall covering portion extends on the mounting step portion.

Preferably, the support shoulder portion is formed with a communication step portion communicating with the elastic avoidance portion at least at one end in the transverse direction, the elastic arm portion includes a tightening portion bent from one transverse end of the transverse peripheral wall covering portion and extending over the communication step portion, and an elastic main body arm extending from the tightening portion at least partially over the elastic avoidance portion in the transverse direction, and the hooking portion is bent from the top end of the elastic main body arm outward in the longitudinal direction and is hooked over the support shoulder portion.

Preferably, the elastic body arm is formed with a contact protrusion protruding toward the plug guide receiving cavity, the contact protrusion being located at least partially within the plug guide receiving cavity as viewed from above.

Preferably, the top end of the lateral peripheral wall covering portion is bent toward the plug guide portion receiving cavity to form a protecting portion supported on the support shoulder portion.

Preferably, a high-level platform is formed at the top of the support shoulder near the communication step part, a low-level groove adjacent to the high-level platform is also formed at the top of the support shoulder, the protection part is supported on the high-level platform, and the hooking part is supported in the low-level groove.

Preferably, the horizontal position of the lower groove surface is lower than the horizontal position of the upper table surface, and the upper surface of the hooking portion is lower than the upper surface of the protecting portion.

Preferably, the board-to-board socket is mated with a pair of board-to-board plugs, and in the mated state of the plugs, the free ends of the protecting portions do not cover the elastic body arms when viewed from above, and the protecting portions at least partially cover the elastic body arms after the plugs are inserted into the sockets.

Preferably, the island portion is provided at both lateral ends thereof with protected portions at a lower level than the island portion, and the socket reinforcing member further includes a central guide portion bent downward from the lateral inner side of the main body portion and extending to the protected portions and covering the protected portions.

Preferably, the socket reinforcement further includes a longitudinal peripheral wall covering portion bent downward from a lateral outer side of the main body portion and covering the longitudinal peripheral wall, and a bottom of the longitudinal peripheral wall covering portion is fixed as a fillet.

Preferably, the plug guide receiving cavity is formed with a through-hole between the protected portion and the longitudinal peripheral wall, and the central guide portion includes a first central guide arm bent downward from the lateral inner side of the main body portion and extending on the inner side surface of the longitudinal peripheral wall, a support bottom arm bent from the first central guide arm and extending along the through-hole to the bottom of the protected portion, and a second central guide arm bent from the support bottom arm and extending along the protected portion.

Preferably, the protected portion includes a table surface portion with a horizontal plane lower than the island portion, an avoidance slope formed by inclining obliquely downward from the table surface portion, and a clamping groove formed by downwardly recessing from the table surface portion, the second central guide arm extends obliquely upward along the avoidance slope, and the tail end of the second central guide portion is bent downward to form a clamping end portion clamped into the clamping groove.

According to the application, the elastic main body arm is bent and extended towards the longitudinal outer side to form the hanging part hung on the supporting shoulder, and the top end of the transverse outer peripheral wall covering part is bent towards the longitudinal inner side to form the protection part higher than the hanging part, so that the elastic main body arm is protected from being damaged due to downward wiping and hanging of the plug reinforcing piece when the plug is inserted.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application.

Fig. 1 to 15 are drawings illustrating a first embodiment of a board-to-board connector assembly according to the present application:

FIG. 1 is a combination diagram of a board-to-board connector assembly according to an embodiment;

FIG. 2 is a cross-sectional view taken along the line A-A of FIG. 1;

FIG. 3 is a perspective view of a pair of board-to-board plugs according to an embodiment;

Fig. 4 is a perspective view and a partial enlarged view of a plug body of a pair of board-to-board plugs according to the embodiment;

FIG. 5 is a perspective view of a plug reinforcement of a pair of board-to-board plugs of the embodiment;

FIG. 6 is another perspective view of an alternate angle of the plug reinforcement of a pair of board-to-board plugs of the embodiment;

FIG. 7 is a perspective view of a pair of board-to-board sockets according to an embodiment;

Fig. 8 is a perspective view and a partial enlarged view of a socket body of a board-to-board socket according to an embodiment;

fig. 9 is a perspective view of a socket stiffener of a board-to-board socket of an embodiment;

FIG. 10 is another perspective view of the socket stiffener of a board-to-board socket of an embodiment;

FIG. 11 is a top view of a socket stiffener of a board-to-board socket of an embodiment;

FIG. 12 is a left or right side view of a socket stiffener of a board-to-board socket of an embodiment;

FIG. 13 is a side view of a socket stiffener of a board-to-board socket of an embodiment;

FIG. 14 is a cross-sectional view taken along the dashed line B-B of FIG. 1;

Fig. 15 is a partial cross-sectional view taken along the dashed line C-C of fig. 1.

Fig. 16-18 are drawings illustrating a second embodiment of a board-to-board connector assembly according to the present application, fig. 16 is a partial perspective view of a board-to-board receptacle according to the second embodiment;

Fig. 17 is a perspective view of a socket stiffener of a two-board-to-board socket of the embodiment;

fig. 18 is a side view of a socket stiffener of a two-board-to-board socket of an embodiment.

Fig. 19 to 25 are explanatory views of a third embodiment of the board-to-board connector assembly of the present application, fig. 19 is a perspective view and a partial enlarged view of a board-to-board socket of the third embodiment;

Fig. 20 is a partial enlarged view of a socket body of the three-board-to-board socket of the embodiment;

Fig. 21 is a perspective view of a socket stiffener of the three board-to-board socket of the embodiment;

fig. 22 is another perspective view of the socket stiffener of the three board-to-board socket of the embodiment;

fig. 23 is a side view of a socket stiffener of the three board-to-board socket of the embodiment;

Fig. 24 is a front or rear view of a socket stiffener of the three board-to-board socket of the embodiment;

fig. 25 is a top view of a socket stiffener of a three board-to-board socket of an embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings.

The direction definition of the present application is right (or lateral direction) with the X direction shown in fig. 1 as the left-right direction, front (or longitudinal direction) with the Y direction as the front-back direction, and upper (i.e., vertical) with the Z direction as the up-down direction.

Example 1

Referring to fig. 1, 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, wherein the plug a and the socket B are fastened and connected with each other.

The plug a includes a plug body 10, a plurality of plug terminals 20 formed in the plug body 10, and plug reinforcements 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 socket reinforcements 60 mounted and fixed on both lateral ends of the socket body 40.

Referring to fig. 2 to 6, the plug body 10 of the plug a includes a top wall 11, a pair of plug side walls 12 formed to extend downward from both sides of the top wall 11 in the longitudinal direction, plug guide portions 14 formed at both ends of the plug body 10 in the transverse direction, and island receiving cavities 13 formed between the top wall 11, the pair of plug side walls 12 and the plug guide portions 14.

The plug terminals 20 are integrally formed on the pair of plug side walls 12 in two rows in the lateral direction, and the plug guide 14 includes a bottom surface 141, a longitudinal outer side surface 142, a pair of lateral outer side surfaces 143, and a slope 144 facing the island receiving cavity 13. The longitudinal outer side 142 is provided with a first notch 1421, and the lateral outer side 143 includes two longitudinally protruding bumps 1431,1432, a second notch 1433 located between the two bumps 1431,1432, and a third notch 1434 located between the bump 1432 and the plug sidewall 12. The inclined surface 144 is formed with an inclined surface 1441 that is formed upward from the bottom surface 141 to the top wall 11 and a catching hole 1442 that is formed by being recessed upward from the inclined surface 1441 on a side near the bottom surface 141.

The plug reinforcement 30 includes a cover base 31 which covers the bottom surface 141 of the plug guide 14 in the longitudinal direction, a longitudinal outer side cover 35 and a longitudinal inner side cover 34 which are respectively covered on the longitudinal outer side 142 and are engaged in the engagement hole 1442 and formed by bending and extending upward from both ends of the cover base 31 in the transverse direction, and a transverse outer side cover 33 which is covered outside the transverse outer side 143 in the transverse direction and formed by bending and extending upward from both ends of the cover base 31 in the longitudinal direction. The longitudinal outer side cover 35 is engaged with the first notch 1421.

The lateral outer side cover 33 includes a contact portion 331 that is snapped into the second notch 1421, and a solder leg 332 that is bent from the top of one end of the lateral outer side cover 33 away from the longitudinal outer side cover 35 to the longitudinal outer side, where the contact portion 331 of the lateral outer side cover 33 is snapped into the second notch 1433, and the solder leg 332 is snapped into the third notch 1434 and then is bent to the longitudinal outer side, and the lateral outer side cover 33 is further provided with a bayonet 333 to be snapped into the periphery of the bump 1432, so as to enhance the holding force between the plug reinforcement 30 and the plug guide 14.

Referring to fig. 2, the plug terminal 20 includes a plug terminal leg 24 extending from the upper surface of the top wall 11 in the longitudinal direction out of the top wall 11, a plug terminal first contact portion 22 bent from the plug terminal 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 to the outer side surface of the plug side wall 12. The second contact portion 23 of the plug terminal is provided with a groove structure.

With continued reference to fig. 1,2, 7 and 8, 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 both sides of the bottom wall 41 in the longitudinal direction, an island 45 protruding upward from the bottom wall 41 between the pair of socket side walls 42, socket guide portions 44 formed at both lateral ends of the socket body 40, and a plug side wall receiving cavity 43 formed between the island 45 and the pair of socket side walls 42.

The bottom wall of the socket body 40 is provided with a plurality of terminal slots 46 from bottom to top, the socket terminals 50 are assembled in the terminal slots 46 upwards, the socket terminals 50 comprise supporting arm portions 51 extending in the terminal slots 46 at the bottom wall 41 and exposed out of the bottoms of the terminal slots 46, socket terminal second contact portions 52 formed by bending and extending from the longitudinal outer sides of the supporting arm portions 51 and located on the longitudinal side surfaces of the island portions 45 and facing the socket side walls 42, socket terminal first contact portions 53 formed by bending and extending from the longitudinal inner sides of the supporting arm portions 51 and located on the longitudinal side surfaces of the socket side walls 42, holding portions 54 formed by bending and extending from the top ends of the first contact portions 53 reversely, and soldering legs 55 formed by bending and extending from the lower ends of the holding portions 54 vertically and extending to the longitudinal outer sides of the bottom wall 41 of the socket body 40.

When the plug a is mated with the socket B, the island 45 is received in the island receiving cavity 13 of the plug a, the plug sidewall 12 of the plug a is received in the plug sidewall receiving cavity 43 of the socket B, and the plug guide 14 is guided into the socket guide 44. The plug terminal 20 is engaged between the first and second contact portions 53,52 of the socket terminal 50, and the first and second contact portions 22 and 23 of the plug terminal 20 are electrically contacted with the first and second contact portions 53,52 of the socket terminal 50, respectively.

Referring to fig. 8, the two lateral ends of the island 45 are provided with a protected portion 451 toward the socket guide portion 44, and the protected portion 451 includes a table portion 453 having a horizontal plane lower than the island 45, an escape slope 452 formed obliquely downward from the table portion 453, a locking groove 454 formed by downwardly recessing from the table portion 453, and a communication groove 455 formed laterally outward from the locking groove 454 and communicating with the escape slope 452.

The socket guide 44 includes peripheral walls 441,442 and a plug guide receiving cavity 443 located between the peripheral walls 441, 442. The outer circumferential wall 441 includes a longitudinal outer circumferential wall 441 and a pair of lateral outer circumferential walls 442 connected to both ends of the longitudinal outer circumferential wall 441, and the lateral outer circumferential walls 442 are connected to the socket side walls 42.

The plug guide receiving cavity 443 has a through hole 4431 formed therethrough in the up-down direction corresponding to the lateral extension of the island 45, and the through hole 4431 extends up to the lower end of the longitudinal peripheral wall 441. The lateral outer side and the inner side of the longitudinal peripheral wall 441 are respectively provided with a first extension groove 4411,4412 and a second extension groove 4411,4412, and the second extension groove 4412 is communicated with the through hole 4431. The middle of the longitudinal peripheral wall 442 protrudes upward to form a support shoulder 4421, and the outer periphery of the support shoulder 4421 is provided with a mounting step 4425 extending in the transverse direction and positioned at the longitudinal outer side of the support shoulder 4421, a communication step 4426 for isolating the support shoulder 4421 from the socket side wall 42, and an elastic avoidance 4424 extending in the transverse direction and positioned at the longitudinal inner side of the support shoulder 4421. The mounting step 4425, the communication step 4426 and the elastic relief 4424 are communicated with each other to form a U-shaped step. The top surface of the supporting shoulder 4421 is respectively provided with a low-level groove 4423 and a high-level platform 4422, the low-level groove 4423 is close to one side of the longitudinal peripheral wall 441, the high-level platform 4422 is close to the communication step portion 4426, and the horizontal position of the top surface of the high-level platform 442 is higher than the horizontal position of the surface of the low-level groove 4423. The mounting step 4425 is partially penetrated in a vertical direction to form a third extension groove 4428.

With continued reference to fig. 9 to 13, the socket stiffener 60 includes a main body portion 61 covering the top surface of the longitudinal peripheral wall 441 in the longitudinal direction, a longitudinal peripheral wall covering portion 62 bent downward from the lateral outer end of the main body portion 61 and extending into the first extending 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 at the lateral end of the island 45, a lateral peripheral wall covering portion 64 bent downward from the longitudinal both ends of the main body portion 61 and extending along the mounting step portion 4425 and located on the longitudinal outer side of the lateral peripheral wall 442, and an elastic arm portion 65 bent reversely from the free end of the lateral peripheral wall covering portion 64 and extending to the elastic relief portion 4424 through the communication step portion 4426. The elastic arm portion 65 may be bent from any one of the lateral ends of the lateral peripheral wall covering portion 64 to the elastic avoiding portion 4424, and in still another embodiment, the elastic arm portion 65 may be bent reversely downward from the longitudinal ends of the lateral outer side of the main body portion 61 to extend to the elastic avoiding portion 4424.

The free ends 642 of the longitudinal peripheral wall covering portions 62 are fixed to the printed circuit board as fillets, and the bottom ends of the transverse peripheral wall covering portions 64 are extended to the printed circuit board as fillets through the third extension grooves 4428 for solder fixation. The main body 61 is formed with first and second curved surface guide parts 611,612 by being folded down toward the plug guide receiving cavity 443 side on both sides in the longitudinal direction of the central guide part 63, and the first curved surface guide part 611 is consistent with the guide curved surface 636 formed by the central guide part 63 being folded down from the main body 61.

The central guide portion 63 includes a first central guide arm 631 extending downward from the inner side of the main body portion 61 in the second extending groove 4412, a supporting bottom arm 632 extending from the bottom of the first central guide arm 631 to the bottom of the protected portion 451 on both sides of the island 45 along the through hole 4431, a second central guide arm 634 extending obliquely upward from the supporting bottom arm 632 to the upper side of the protected portion 451, and a locking end 635 extending downward from the free end of the second central guide arm 634 and locking into the locking 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 portions 451 at both lateral ends of the island 45. The longitudinal outer side cover 35 and the longitudinal inner side cover 34 of the plug reinforcement 30 are 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, respectively, but in the inserted state, the longitudinal outer side cover 35 and the longitudinal inner side cover 34 are not in electrical contact with the first and second central guide arms 631,634. During the insertion process, the supporting bottom arm 632 is pressed and the mounted pcb generates supporting force to make the first and second central guide arms 631,634 have a certain elasticity.

The top of the outer peripheral wall covering portion 64 is bent toward the elastic arm portion 65 to form a protecting portion 66 supported above the elevated table 4422 of the support shoulder 4421. When the plug a is not inserted into the socket B, that is, when the socket B is in a natural state, the protection portion 66 does not cover the elastic arm portion 65 when viewed from the top down (that is, as shown in fig. 11), and when the elastic arm portion 65 is pressed to the outside in the longitudinal direction by the contact portion 331 of the lateral outside surface covering portion 33 of the plug reinforcement 30, the elastic arm portion 65 is at least partially located below the protection portion 66.

In a natural state, the elastic arm portion 65 is located above the elastic avoidance portion 4424 and has a deformation gap with the inner side surface of the support shoulder portion 4421, and when the elastic arm portion 65 is longitudinally pressed, the elastic arm portion 65 deforms in the deformation gap. The elastic arm portion 65 includes a tension portion 651 formed by bending reversely from a free end of the lateral outer peripheral wall covering portion 64 in the lateral direction, an elastic body arm 652 extending from the tension portion 651 in the lateral direction on the elastic escape portion 4424, a contact protrusion 653 protruding from the elastic body arm 652 toward the plug guide receiving cavity 443, and a hooking portion 654 formed by bending and extending from a tip of the elastic body arm 652 toward the lateral outer peripheral wall covering portion 64. The hitching section 654 is supported above the lower slot 4425 of the support shoulder 4421. The curved line of the bent portion of the hooking portion 654 coincides with the second curved guide portion 612 of the main body 61.

Referring to fig. 14, the top surface of the protecting portion 66 is higher than the top surface of the hooking portion 654 (referring to fig. 13), and the top surface of the hooking portion 654 and the top surface of the main body 61 are at the same horizontal position. The contact protrusion 653 is located entirely within the plug guide receiving cavity 443 when viewed from the side (as shown in fig. 12). When the plug a is inserted, the lateral outer surface covering portion 33 of the plug reinforcement 30 contacts the protecting portion 654 first, and after the protecting portion 654 is guided to a correct position toward the plug guide portion receiving cavity 433, the elastic body arm 652 is pressed down continuously, the elastic body arm 652 is pressed longitudinally outward along the inner edge of the hooking portion 654 of the plug reinforcement 30, the hooking portion 654 keeps the elastic body arm 652 from being damaged by being rubbed down and turned over, and after the plug a is finally inserted, the elastic body arm 652 is pressed and deformed toward the supporting shoulder 4421 and provides an elastic force, and the contact protrusion 653 finally makes electrical contact with the contact portion 331 of the plug reinforcement 30 to transmit electric current. The plug reinforcement 30 and the socket reinforcement 60 are in electrical contact with the two contact protrusions 653 through the two contact portions 331 in the longitudinal direction for transmitting a current, which may be up to 5 amperes for the transmission load of the current.

The elastic body arm 652 preferably has an elastic modulus such that the hooking portion 654 does not move longitudinally beyond the longitudinal outer side surface of the lateral outer peripheral wall covering portion 64. The lateral peripheral wall covering portion 64 is provided with a clearance gap 643 at a position corresponding to the hitching portion 654 in the longitudinal direction, and the hitching portion 654 extends above the clearance gap 643 on the lateral peripheral wall covering portion 64 without contact when the plug a is inserted.

In this embodiment, the elastic body arm 652 is bent and extended towards the outer side in the longitudinal direction to form the hanging portion 654 hanging on the supporting shoulder 4421, and the top end of the lateral peripheral wall covering portion 64 is bent towards the inner side in the longitudinal direction to form the protecting portion 66 higher than the hanging portion 654, so that the elastic body arm 652 is protected from being damaged due to the downward hanging of the plug reinforcement 30 when the plug is inserted.

Example two

Referring to fig. 16 to 18, a second embodiment of the board-to-board connector assembly of the present application is shown, in which the board-to-board plug a of the present embodiment is identical to the first embodiment only in part of the structure of the socket stiffener 60.

The difference between the first embodiment and the second embodiment is that the position of the lateral peripheral wall covering portion 64 corresponding to the hooking portion 654 is eliminated from the clearance gap 643 in the first embodiment, but the free end of the hooking portion 654 is stamped into a smaller contact tip by protruding upward from the position of the lateral peripheral wall covering portion 64 corresponding to the hooking portion 654 to form the contact piece 644. When the plug a is inserted into the socket B, the elastic body arms 652 deform toward the outside in the longitudinal direction to force the contact tips 655 of the hitching sections 654 to extend toward the contact pieces 644 and finally electrically contact, so that the transmission of electric current can be directly transmitted to the contact pieces 644 on the lateral peripheral wall covering sections 64 through the contact portions 331 of the socket reinforcing members 30 via the contact protrusions 653 of the socket reinforcing members 60 and finally transmitted to the printed circuit board through the solder feet 642 at the bottom of the lateral peripheral wall covering sections 64, which transmission path is defined as a first transmission path. So that the current does not need to be transmitted solely through the paths of the contact protrusion 653, the elastic body arm 652, the tension portion 651, and the lateral outer peripheral wall covering portion 64, which is defined as the second transmission path. Therefore, multipath parallel transmission of the plug A and the socket B is realized, the heating phenomenon is reduced, and the current bearing capacity is improved.

The contact 644 preferably extends upward by a length not exceeding the upper surfaces of the main body 61 and the protecting portion 66. The ability of the contact 644 to deform longitudinally outward is preserved to protect the hitching section 654 and the contact 644 from damage due to misplacement.

In this embodiment, the contact piece 644 is formed by extending upward from the position of the lateral peripheral wall covering portion 64 corresponding to the hooking portion 654, so that when the plug a is inserted into the socket and deformed longitudinally outward, the elastic body arm 652 is electrically contacted with the contact piece 644 through the free end of the hooking portion 654, thereby realizing multi-path current transmission and being beneficial to improving the current carrying capacity of the socket stiffener 60.

In the process of the simulated temperature rise test, the temperature rise of the first embodiment is 20.4 ℃ and the temperature rise of the second embodiment is 17.4 ℃ under the condition that the passing current is 5 amperes.

Example III

Referring to fig. 19 to 25, the three-phase embodiment is identical to the first embodiment in that the socket B is different from the first embodiment in that the socket guide 44 is partially different and the socket reinforcement 60 is not identical in structure.

The support shoulder 4421 of the socket guide portion 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 mounting step portion 4425 and the elastic avoidance portion 4424 do not need to communicate through the communication step portion 4426, i.e. the communication step portion 4426 is eliminated. The remaining structure of the socket step 44 is identical to the embodiment.

The socket reinforcing member 60 of the third embodiment is provided except that it includes a main body portion 61, a central guide portion 63, a longitudinal peripheral wall covering portion 62, and a lateral peripheral wall covering portion 64, which are identical to those of the embodiment. Also included are a protective arm 68 and a contact spring arm 69 extending from the top end of the lateral peripheral wall covering portion 64 in a folded-in and downward manner.

The protection arm 68 is formed by bending and extending from the top of the free end of the lateral outer peripheral wall covering portion 64 toward the longitudinal inner lower side, and the contact spring arm 69 is formed by bending and extending from the top of the lateral outer peripheral wall covering portion 64 between the protection arm 68 and the main body portion 61 toward the longitudinal inner lower side.

The protection arm 68 includes a bending protection portion 681 bent from the top of the lateral outer peripheral wall covering portion 64 toward the inside in the longitudinal direction and crossing the support shoulder 4421, a first extension protection portion 682 formed by extending obliquely downward from the bending protection portion 681, and a second extension protection portion 683 formed by continuing to extend obliquely downward from the first extension protection portion 682 and located above the elastic avoidance portion 4424. The first extension protecting portion 682 and the second extension protecting portion 683 do not have the same extension angle, and the extension angle of the first extension protecting portion 682 is larger than the extension angle of the second extension protecting portion 683, that is, the first extension protecting portion 682 is closer to the plug guide portion receiving cavity 443 with a shorter extension length than the second extension protecting portion 683. The extension angles are defined as the angles between the first and second extension protecting portions 682,683 and the vertical direction. The first extension protecting portion 682 also extends away from the main body 61.

The resilient contact arm 69 includes a bent spanning portion 691 bent from the top of the lateral peripheral wall covering portion 64 toward the inside in the longitudinal direction and spanning the support shoulder 4421, an extension arm 692 formed by extending obliquely downward from the bent spanning portion 691, and a contact portion 693 formed by continuing to extend obliquely downward from the extension arm 692 and located at least partially within the plug guide portion receiving cavity 443. The extension arm 692 does not coincide with the extension angle of the contact portion 693, and the extension arm 692 extends at an angle less than the extension angle of the contact portion 693, i.e., such that the extension arm 692 approaches the plug guide portion receiving cavity 443 more slowly with a shorter extension length than the contact portion 693. The extension arm 692 extends obliquely to the contact portion 693 in the direction of the protection arm 68.

Meanwhile, the extension arm 692 extends at an angle less than that of the first extension protection 682 to bring the first extension protection 682 closer to the plug guide receiving cavity 443. The contact portion 693 extends at an angle greater than the second extension protection portion 683 to bring the contact portion 693 closer to or into the plug guide portion receiving cavity 443. In the plug a uninserted state, the free end portion of the contact portion 693 is located entirely or at least partially within the plug guide receiving cavity 443, and the free end portion of the second extended guard portion 683 of the guard arm 68 is located entirely or at least partially above the elastic relief 4424, as viewed from above.

The horizontal position of the top end of the bent spanning part 691 is not higher than the top end of the bent protecting part 681 of the protecting arm 68, and preferably the top end of the bent spanning part 691 is lower than the top end of the bent protecting part 681.

During the insertion of the plug a into the socket B, the joint edge of the lateral outer side cover 33 and the cover base 31 of the plug reinforcement 30 is guided by the bent protecting portion 681 of the protecting arm 68, and continues to be pushed down along the bent protecting portion 681 to be guided by the first extending protecting portion 682, at which time the extension arm 692 of the elastic contact arm 69 is away from the plug guide receiving cavity 43 with respect to the first extending protecting portion 682, and the extension arm 692 does not need to guide the plug reinforcement 30. After the plug reinforcement 30 is guided by the first extension protecting portion 682, the insertion position of the plug a is substantially not deviated, the guiding action of the second extension protecting portion 683 is weakened, and the pressing down is continued, and the contact portion 331 of the laterally outer covering portion 33 is elastically contacted with the contact portion 693. After the plug a is buckled, the elastic contact arm 69 deforms 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 protective arms 68 do not come into contact with the plug reinforcement 30. The transmission of the current is transmitted to the printed circuit board via the contact portion 331, the elastic contact arm 69, and the longitudinal peripheral wall covering portion 64 of the plug reinforcement 30.

The avoidance inclined surfaces 4429 on both longitudinal sides of the top end of the support shoulder 4424 can enable the protection arm 68 and the bending protection portion 681 of the elastic contact arm 69 to bend at a smaller included angle, and the bending spanning portion 691 can be in a supporting state of the support shoulder 4421.

The board-to-board connector assembly of the present embodiment is formed by bending inward at the top of the lateral peripheral wall covering portion 64 of the socket reinforcing member 60 to form the protection arms 68 and the elastic contact arms 69 for guiding and electrically connecting, respectively, the protection arms 68 guiding and protecting the insertion of the plug reinforcing member 30 without damaging the socket B or the plug.

The printed circuit board to which the plug a or the socket B is attached in the present specification is not limited to a circuit board, and may be any board as long as it corresponds to an object provided with a current transmission line.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.

Claims

1. The utility model provides a board to board socket, includes socket body, socket terminal and socket reinforcement, the socket body include the diapire, from the socket lateral wall that the vertical both ends of diapire upwards bulge formed, form in socket guide portion at the horizontal both ends of socket body reaches from the upwards bulge of diapire forms island portion, its characterized in that, socket guide portion includes plug guide portion receiving chamber, is located the vertical periphery wall of the horizontal outside of plug guide portion receiving chamber and is located a pair of horizontal periphery wall of the vertical both sides of plug guide portion receiving chamber, socket reinforcement includes cover in the main part of vertical periphery wall upper surface, from the vertical both sides of main part bend downwards and extend in the horizontal direction cover in the horizontal periphery wall outer horizontal periphery wall cover portion and from horizontal periphery wall cover portion extends to be close to the elastic arm portion of plug guide portion receiving chamber one side, the horizontal periphery wall of socket body includes the support shoulder and is located the vertical inboard intercommunication of support shoulder plug guide portion receiving chamber is dodged the elastic arm portion, the elastic arm portion includes and forms in the horizontal periphery wall cover portion of horizontal periphery wall top in the horizontal periphery wall cover portion and the horizontal periphery wall cover portion of horizontal periphery wall top and extend in the horizontal periphery wall top cover portion.

2. The board-to-board socket of claim 1, wherein the elastic arm portion is elastically deformable in a longitudinal direction at the elastic escape portion.

3. The board-to-board socket according to claim 1, wherein a mounting step portion is formed on a longitudinally outer side of the support shoulder portion, and the lateral peripheral wall covering portion extends over the mounting step portion.

4. The board-to-board socket according to claim 1, wherein the support shoulder portion is formed with a communication stepped portion communicating with the elastic escape portion at least at one end in a lateral direction, the elastic arm portion further includes a tightening portion bent from the lateral end of the lateral outer peripheral wall covering portion and extending over the communication stepped portion, and the elastic body arm is formed at the tightening portion.

5. The board-to-board socket of claim 1, wherein the resilient body arm is formed with a contact protrusion protruding toward the plug guide receiving cavity, the contact protrusion being located at least partially within the plug guide receiving cavity as viewed from above.

6. The board-to-board socket of claim 4, wherein a high-level land is formed at a top of the support shoulder near the communication step portion, a low-level groove adjacent to the high-level land is further formed at a top of the support shoulder, the protection portion is supported on the high-level land, and the hooking portion is supported in the low-level groove.

7. The board-to-board socket of claim 6, wherein the horizontal position of the lower slot surface is lower than the horizontal position of the upper table surface.

8. The board-to-board socket of claim 1, wherein the board-to-board socket mates with a board-to-board plug, the free end of the protective portion does not cover the resilient body arm when the plug is in the mated state, as viewed from above and below, and the protective portion at least partially covers the resilient body arm after the plug is inserted into the socket.

9. The board-to-board socket of claim 1, wherein both lateral ends of the island portion are provided with protected portions at a lower level than the island portion, and the socket reinforcing member further comprises a central guide portion bent downward from a lateral inner side of the main body portion and extending to and covering the protected portions.

10. The board-to-board socket according to claim 9, wherein the socket reinforcing member further includes a longitudinal peripheral wall covering portion bent downward from a lateral outer side of the main body portion and covering the longitudinal peripheral wall, and a bottom of the longitudinal peripheral wall covering portion is fixed as a fillet.

11. The board-to-board socket of claim 9, wherein the plug guide receiving cavity is formed with a through-hole between the protected portion and the longitudinal peripheral wall, and the central guide includes a first central guide arm bent downward from the lateral inside of the main body portion to extend on the inner side of the longitudinal peripheral wall, a support bottom arm bent from the first central guide arm and extending along the through-hole to the bottom of the protected portion, and a second central guide arm bent from the support bottom arm to extend along the protected portion.

12. The board-to-board socket of claim 11, wherein the protected portion includes a land portion having a horizontal plane lower than the island portion, a relief slope formed obliquely downward from the land portion, and a catching groove formed downwardly from the land portion, the second central guide arm extends obliquely upward along the relief slope, and a distal end of the second central guide portion is bent downward to form a catching end portion caught in the catching groove.