CN111509430B

CN111509430B - Board-to-board socket

Info

Publication number: CN111509430B
Application number: CN202010286210.7A
Authority: CN
Inventors: 黎英岳; 李亚勇
Original assignee: Shenzhen Everwin Precision Technology Co Ltd
Current assignee: Shenzhen Everwin Precision Technology Co Ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2021-06-08
Anticipated expiration: 2040-04-13
Also published as: CN111509430A

Abstract

The utility model provides a board to board socket, includes socket ontology, socket terminal and socket reinforcement, socket ontology includes the diapire, certainly the vertical both ends of diapire make progress the bulge socket sidewall that forms, be formed at the socket guiding portion at the horizontal both ends of socket ontology and certainly the diapire makes progress the bulge and forms island portion, socket guiding portion includes plug guiding portion and receives the chamber, is located the vertical periphery wall in the horizontal outside in plug guiding portion receiving chamber and being located a pair of horizontal periphery wall in the vertical both sides in plug guiding portion receiving chamber, socket reinforcement including cover in the main part of vertical periphery wall upper surface, certainly the main part extend cover in horizontal periphery wall that horizontal periphery wall is outer covers portion and certainly horizontal periphery wall covers portion extends to horizontal periphery wall is close to the elasticity arm of plug guiding portion receiving chamber one side, elasticity arm top is bent towards vertical outside and is extended to form articulate in elasticity arm top face on the periphery wall And a hanging part.

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 the consumer electronics field, such as smart phones, tablet computers, wearable devices, and the like. Present smart mobile phone and wearable equipment all require extremely high to the space, the size of spare part is reducing equally, a ray of board has reached 0.6 mm's minimum height to the board after board-to-board plug and the socket cooperation of board-to-board producer, the terminal interval has also reached 0.25 mm's distance, so small connector, higher requirement has been proposed to connector structural strength, and compare in traditional board to board connector component, the large-scale function integration of current smart mobile phone, propose higher requirement to electric current bearing capacity, require to reach 5A's bearing capacity to electric current transmission like the LCD screen, traditional board can't adapt to present market to intensity and electric current transmission's requirement to board connector component design.

Disclosure of Invention

In view of this, there is a need to provide a board-to-board socket, which satisfies the requirement that the product has better strength and can transmit large current after being thinned.

In order to solve the technical problem, the application provides a board-to-board socket, including socket ontology, socket terminal and socket reinforcement, socket ontology includes the diapire, from the vertical both ends of diapire upwards bulge the socket lateral wall that forms, form in the socket guide at the horizontal both ends of socket ontology and from the island portion that the diapire upwards bulges the formation, socket guide includes plug guide portion receiving chamber, is located the vertical periphery wall in the horizontal outside of plug guide portion receiving chamber and is located a pair of horizontal periphery wall in the vertical both sides of plug guide portion receiving chamber, socket reinforcement including cover in the main part on vertical periphery wall surface, from the vertical both sides of main part along horizontal direction extend cover in the outer horizontal periphery wall of horizontal periphery wall and from horizontal cover extend to the elasticity arm that the horizontal periphery wall is close to plug guide portion receiving chamber one side, the top of the elastic arm portion bends towards the longitudinal outer side and extends to form a hanging portion hung on the top surface of the transverse outer peripheral wall, and when the elastic arm portion is extruded along the longitudinal outer side, the hanging portion moves towards the longitudinal outer side and is in electrical contact with the top end of the covering portion of the transverse outer peripheral wall.

Preferably, socket ontology's horizontal periphery wall is including supporting the shoulder and being located support the vertical inboard intercommunication of shoulder the elasticity of plug guide portion receiving chamber dodges the portion, the elasticity arm can in elasticity dodges the portion and produces elastic deformation in longitudinal direction, the portion of hitching connects in support on the shoulder.

Preferably, the hanging part comprises a downward contact part formed by downward protrusion, the support shoulder part corresponds to the downward contact part position to form a notch groove for avoiding the downward contact part, and when the elastic arm part is extruded along the longitudinal outer side, the downward contact part moves along the longitudinal outer side and is contacted with the top end of the covering part of the transverse outer peripheral wall.

Preferably, when viewed in a longitudinal section, the bottom end of the lower contact portion is lower than the top surface of the transverse peripheral wall, the lower contact portion is formed by partially tearing the hanging portion and bending downward, the tearing position of the hanging portion is longitudinally inward, an inclined contact surface facing the transverse peripheral wall covering portion is formed on the bottom surface of the lower contact portion, and when the elastic arm portion is pressed along the longitudinal outer side, the inclined contact surface is longitudinally moved outward and electrically contacted with the transverse peripheral wall.

Preferably, the bottom of the longitudinal peripheral wall covering portion is fixed as a solder fillet to the printed circuit board, and the transmission of the electric current is conducted from the hanging portion to the solder fillet of the longitudinal peripheral wall covering portion.

Preferably, the vertical outside of supporting the shoulder is formed with installation step portion, horizontal periphery wall covers the portion extend in on the installation step portion, the support shoulder is formed with the intercommunication at the one end of horizontal direction at least the intercommunication step portion of portion is dodged to elasticity, elasticity arm portion includes certainly horizontal periphery wall covers the portion horizontal one end bend and extends in tensioning portion on the intercommunication step portion and certainly tensioning portion at least part extends in the horizontal direction elasticity dodges the elasticity on the portion elasticity main part arm, the portion of hanging is certainly elasticity main part arm top is outwards bent and is hung in support shoulder top along longitudinal direction.

Preferably, the elastic body arm protrudes towards 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 electrically contacted with the plug reinforcement, and the transmission of the current includes the following two ways: one way is along the leg that contacts convex part, hitching part, contact piece, vertical periphery wall cover portion bottom, and another way is along the leg that contacts convex part, elastic body arm, taut portion, vertical periphery wall cover portion bottom, and two way current transmission path parallel transmission can effectively reduce the temperature rise.

Preferably, both ends in the lateral direction of the island portion are provided with protected portions having a horizontal position lower than that of the island portion, and the socket reinforcement further includes a central guide portion bent downward from the inside in the lateral direction of the main body portion and extending to and covering the protected portions.

Preferably, the socket reinforcement further includes a longitudinal peripheral wall covering portion bent downward from the body portion laterally outward 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 opening between the protected portion and a longitudinal outer peripheral wall, the central guide part comprises a first central guide arm bent downwards from the transverse inner side of the main body part and extending to the inner side surface of the longitudinal peripheral wall, a support bottom arm bent from the first central guide arm and extending to the bottom of the protected part along the through hole, and a second central guide arm bent from the support bottom arm and extending along the protected part, the protected part comprises a table-board part with the horizontal plane lower than that of the island part, an avoiding inclined plane formed by inclining downwards from the table-board part and a clamping groove formed by downwards sinking from the table-board part, the second central guide arm extends obliquely upwards along the avoiding inclined plane, and the tail end of the second central guide part is bent downwards to form a clamping end part clamped in the clamping groove.

This application is through bending towards the longitudinal outside on the elastic main body arm and extending the formation and hanging the portion of connecing on supporting the shoulder, it is in to hang the portion of connecing when the elastic arm portion is extruded along the longitudinal outside, make the portion of connecing with horizontal periphery wall cover direct contact and form the current path, reduce the temperature rise of product so that it bears bigger electric current.

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 application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit 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 an assembled view of a board-to-board connector assembly according to an embodiment;

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

FIG. 3 is a perspective assembly view of a one-board-to-one-board plug according to an embodiment;

fig. 4 is a perspective view of a plug body of a one-plate-to-one-plate plug of an embodiment and a partially enlarged view thereof;

FIG. 5 is a perspective view of a header reinforcement member of a one-plate-to-one header of an embodiment;

FIG. 6 is a perspective view of an alternate angle of the header reinforcement of the one-plate-to-one header of the embodiment;

FIG. 7 is a perspective assembly view of a one-board-to-one-board socket according to an embodiment;

fig. 8 is a perspective view of a socket body of the one-board-to-board socket of the embodiment and a partially enlarged view thereof;

FIG. 9 is a perspective view of a socket stiffener for a board-to-board socket according to an embodiment;

FIG. 10 is a perspective view of an alternate angle of the receptacle reinforcement of the one-board-to-board receptacle of the embodiment;

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

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

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

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

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

Fig. 16 to 18 are drawings for describing a second embodiment of the board-to-board connector assembly according to the present application:

FIG. 16 is a partial perspective view of a two-board-to-board socket according to an embodiment;

FIG. 17 is a perspective view of a socket stiffener for a two-plate to two-plate socket according to an embodiment;

FIG. 18 is a side view of a socket stiffener for a two-board-to-board socket of an embodiment;

FIG. 19 is a partial perspective view of an embodiment three-plate to plate socket;

FIG. 20 is an enlarged partial view of the receptacle body of the three-plate to plate receptacle of the embodiment;

FIG. 21 is a perspective view of a socket stiffener for an embodiment three-plate to plate socket;

fig. 22 is a cross-sectional view taken along the dashed line D-D in fig. 19.

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 described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings.

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

Example one

Referring to fig. 1, the board-to-board connector assembly of the present application includes a plug a attached to a printed circuit board and a socket B attached to another printed circuit board, wherein the plug a and the socket B are in buckled connection with each other.

The plug a comprises a plug body 10, a plurality of plug terminals 20 formed in the plug body 10, and plug reinforcing members 30 fixed to both ends of the plug body 10 in the transverse direction. The socket B includes a socket body 40, socket terminals 50 mounted on the socket body 40, and socket reinforcing members 60 mounted and fixed to 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 by extending downward from two longitudinal sides of the top wall 11, plug guide portions 14 formed at two 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 portions 14.

The plug terminals 20 are integrally formed on a pair of plug side walls 12 in two rows in the lateral direction, and the plug guide portion 14 includes a bottom surface 141, a longitudinal outer side 142, a pair of lateral outer sides 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 transverse outer side 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 upwardly extending from the bottom surface 141 to the top wall 11 and a catching hole 1442 concavely formed from the inclined surface 1441 upwardly at a side close to the bottom surface 141.

The plug reinforcement member 30 includes a covering base 31 covering the bottom surface 141 of the plug guide portion 14 along the longitudinal direction, a longitudinal outer side surface covering portion 35 and a longitudinal inner side surface covering portion 34 respectively covering the longitudinal outer side surface 142 and being clamped into the clamping hole 1442, and a transverse outer side surface covering portion 33 covering the transverse outer side surface 143 along the transverse direction, which is formed by upward bending and extending the longitudinal two ends of the covering base 31. The longitudinal outer surface covering 35 is snapped into the first recess 1421.

The transverse outer side surface covering portion 33 includes a contact portion 331 clamped in the second notch 1421, and a solder leg 332 formed by vertically bending towards the longitudinal outer side from the top of one end of the transverse outer side surface covering portion 33 away from the longitudinal outer side surface covering portion 35, the contact portion 331 of the transverse outer side surface covering portion 33 is clamped in the second notch 1433, the solder leg 332 is formed by vertically bending towards the longitudinal outer side after being clamped in the third notch 1434, the transverse outer side surface covering portion 33 is further provided with a bayonet 333 to be clamped in the periphery of the projection 1432, so that the holding force between the plug reinforcing member 30 and the plug guiding portion 14 is enhanced.

Referring to fig. 2, 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 to the outside of 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 from the lower end of the plug terminal first contact portion 22 in the opposite direction and extending 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.

As shown in 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 sidewalls 42 extending upward from two longitudinal sides of the bottom wall 41, an island 45 protruding upward from the bottom wall 41 between the pair of socket sidewalls 42, socket guides 44 formed at two lateral ends of the socket body 40, and a plug sidewall receiving cavity 43 formed between the island 45 and the pair of socket sidewalls 42.

The bottom wall of the socket body 40 is provided with a plurality of terminal grooves 46 from bottom to top, the socket terminal 50 is assembled in the terminal grooves 46 upwards, the socket terminal 50 includes a support arm 51 extending in the terminal groove 46 at the bottom wall 41 and exposed at the bottom of the terminal groove 46, a socket terminal second contact portion 52 bent upwards from the longitudinal outer side of the support arm 51 and located on the longitudinal side of the island portion 45 and facing the socket side wall 42, a socket terminal first contact portion 53 bent upwards from the longitudinal inner side of the support arm 51 and located on the longitudinal side of the socket side wall 42, a holding portion 54 bent upwards from the top end of the first contact portion 53, and a solder foot 55 bent vertically from the bottom end of the holding portion 54 and extending towards the longitudinal outer side and located on the lower surface of the bottom wall 41 of the socket body 40.

When the plug a is matched with the socket B, the island portion 45 is accommodated in the island portion receiving cavity 13 of the plug a, the plug side wall 12 of the plug a is accommodated 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 clamped between the first and

second contact portions

53 and 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 and 52 of the socket terminal 50, respectively.

As shown in fig. 8, protected portions 451 are provided at both lateral ends of the island portion 45 toward the socket guide portion 44, and each protected portion 451 includes a mesa portion 453 having a lower horizontal surface than the island portion 45, an escape slope 452 inclined obliquely downward from the mesa portion 453, a catching groove 454 recessed downward from the mesa portion 453, and a communicating groove 455 communicating with the escape slope 452 and opened laterally outward from the catching groove 454.

The receptacle guide 44 includes

peripheral walls

441, 442 and a plug guide receiving cavity 443 located between the

peripheral walls

441, 442. The peripheral wall 441 includes a longitudinal peripheral wall 441 and a pair of lateral peripheral walls 442 connected to both ends of the longitudinal peripheral wall 441, the lateral peripheral walls 442 being connected to the receptacle side walls 42.

The plug guide receiving cavity 443 is formed with a through hole 4431 penetrating in the up-down direction corresponding to the lateral extension of the island 45, the through hole 4431 extending up to the lower end of the longitudinal outer peripheral wall 441. The longitudinal outer peripheral wall 441 is provided at the lateral outer side and the lateral inner side thereof with first and

second extension grooves

4411, 4412, respectively, and the second extension groove 4412 communicates with the through-hole 4431. The longitudinal peripheral wall 442 protrudes upward from the middle to form a support shoulder 4421, and the outer periphery of the support shoulder 4421 is provided with a mounting step 4425 located on the longitudinal outer side of the support shoulder 4421 and extending in the transverse direction, a communication step 4426 for separating the support shoulder 4421 from the socket side wall 42, and an elastic avoiding portion 4424 located on the longitudinal inner side of the support shoulder 4421 and extending in the transverse direction. The mounting step portion 4425, the communicating step portion 4426 and the elastic escape portion 4424 communicate with each other to form a U-shaped step portion. The top surface of the support shoulder 4421 is provided with a low groove 4423 and a high step 4422, respectively, the low groove 4423 is close to the longitudinal outer peripheral wall 441 side, the high step 4422 is close to the communicating step 4426, and the top surface of the high step 442 has a higher horizontal position than the surface of the low groove 4423. The mounting stepped part 4425 partially penetratingly forms a third extending groove 4428 in a vertical direction.

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 portion 45, lateral peripheral wall covering portions 64 bent downward from the longitudinal ends of the main body portion 61 and extending along the mounting step portions 4425 and located longitudinally outside the lateral peripheral wall 442, and elastic arm portions 65 bent backward from the free ends of the lateral peripheral wall covering portions 64 and extending to the elastic escape portions 4424 through the communication step portions 4426. The elastic arm portion 65 may be bent and extended from either one of the two lateral ends of the lateral outer peripheral wall covering portion 64 to the elastic escape portion 4424, and in yet another embodiment, the elastic arm portion 65 may be bent and extended from the two lateral outer longitudinal ends of the main body portion 61 to the elastic escape portion 4424.

The free end 642 of the longitudinal peripheral wall covering portion 62 is fixed as a solder tail to the printed circuit board, and the bottom end of the lateral peripheral wall covering portion 64 is extended as a solder tail through the third extension groove 4428 to be soldered to the printed circuit board. The body portion 61 is folded downward toward the plug guide receiving cavity 443 side on both longitudinal sides of the central guide portion 63 to form first and second guiding arcs 611 and 612, and the first guiding arc 611 coincides with a guiding arc 636 formed by bending the central guide portion 63 downward from the body portion 61.

The central guide portion 63 includes a first central guide arm 631 bent downward from the inside of the main body portion 61, the first central guide arm extending into the second extending groove 4412, a support base arm 632 bent downward from the bottom of the first central guide arm 631 and extending to the bottom of the protected portion 451 at both sides of the island portion 45 along the through hole 4431, a second central guide arm 634 extending upward from the support base arm 632 in an inclined manner to above the protected portion 451, and a locking end 635 bent downward from the free end of the second central guide arm 634 and locked into the locking groove 454. The first and second center guide

arms

631, 634 are used to guide the insertion of the header reinforcement 30 and protect the longitudinal outer peripheral wall 441 of the socket body 40 and the protected portions 451 at both lateral ends of the island portion 45. The longitudinal outer side surface covering portion 35 and the longitudinal inner side surface covering portion 34 of the plug reinforcement 30 are guided by the first and second

central guide arms

631, 634, respectively, and enter between the first and second

central guide arms

631, 634 above the support base arm 632, but in the inserted state, the longitudinal outer side surface covering portion 35 and the longitudinal inner side surface covering portion 34 are not in electrical contact with the first and second

central guide arms

631, 634. During the insertion process, the support base arm 632 is pressed and the mounted pcb generates a supporting force to make the first and second

central guide arms

631 and 634 have a certain elasticity.

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

In a natural state, the elastic arm portion 65 is located above the elastic avoiding 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 straining portion 651 formed by being bent back from a free end in the lateral direction of the lateral peripheral wall cover portion 64, an elastic body arm 652 extending from the straining portion 651 over the elastic escape portion 4424 in the lateral direction, a contact protrusion 653 protruding from the elastic body arm 652 toward the plug guide receiving cavity 443, and a catching portion 654 formed by being bent and extended from a tip end of the elastic body arm 652 toward the lateral peripheral wall cover portion 64. The hanging portion 654 is supported above the low groove 4425 of the support shoulder 4421. The curved surface line of the bent portion of the hook 654 coincides with the second curved surface guide portion 612 of the main body 61.

Referring to fig. 14, the top surface of the protection part 66 is at a higher level than the top surface of the hanging part 654 (refer to fig. 13), and the top surface of the hanging part 654 is at the same level as the top surface of the main body part 61. The contact projections 653 are located entirely within the plug guide receiving cavity 443 when viewed from the side (as shown in fig. 12). When a plug a is inserted, the lateral outer side surface covering portion 33 of the plug reinforcement 30 contacts the protection portion 66 first and obtains a correct position of the protection portion 66 guided toward the plug guide receiving cavity 433, and then the plug reinforcement 30 is pressed downward, the elastic body arm 652 is pressed to the longitudinal outer side along the inner edge of the hanging portion 654, the hanging portion 654 keeps the elastic body arm 652 from being scratched downward and folded over to be damaged, after the plug a is finally inserted, the elastic body arm 652 is pressed and deformed toward the supporting shoulder 4421 to provide an elastic force, and the contact protrusion 653 is finally electrically contacted with the contact portion 331 of the plug reinforcement 30 to transmit current. The plug reinforcement 30 and the socket reinforcement 60 transmit current through the two contact portions 331 and the two contact protrusions 653 in the longitudinal direction, and the transmission load of the current can reach 5 amperes.

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

In this embodiment, the elastic body arm 652 is bent and extended toward the longitudinal outer side to form a hanging portion 654 hanging on the support shoulder 4421, and the top end of the transverse peripheral wall covering portion 64 is bent toward the longitudinal inner side to form a protecting portion 66 higher than the hanging portion 654, so that the elastic body arm 652 is protected from being damaged by 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 according to the present invention is shown, in which the board-to-board connector a of the present embodiment is identical to the first embodiment, and only differs from the first embodiment in a part of the structure of the socket stiffener 60.

The difference between the second embodiment and the first embodiment is that: the position avoiding notch 643 in the first embodiment is eliminated at the position of the lateral peripheral wall covering portion 64 corresponding to the hanging portion 654, a contact piece 644 is formed by protruding and extending upward from the position of the lateral peripheral wall covering portion 64 corresponding to the hanging portion 654, and the free end of the hanging portion 654 is stamped into a smaller contact tip. When the header a is inserted into the socket B, the elastic body arm 652 is deformed outward in the longitudinal direction to force the contact tip 655 of the hooking portion 654 to extend toward the contact pad 644 and to make electrical contact therewith, so that the transmission of the electric current can be transmitted through the contact portion 331 of the socket reinforcement 30 via the contact protrusion 653 of the socket reinforcement 60 directly to the contact pad 644 on the lateral peripheral wall covering portion 64 and finally to the printed circuit board via the solder tail 642 at the bottom of the lateral peripheral wall covering portion 64, which is defined as a first transmission path. So that the current does not need to be transmitted solely via the paths of the contact projections 653, the elastic body arms 652, the straining portions 651, the lateral peripheral wall covering portions 64, which are defined as second transmission paths. Therefore, the multi-path 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 so as not to exceed the upper surfaces of the main body 61 and the protection part 66. The ability of the contact 644 to deform toward the longitudinal outer side is retained to protect the hook 654 and contact 644 from damage due to mis-insertion.

In the second embodiment, the contact 644 is formed by extending the covering portion 64 of the lateral peripheral wall upwards at a position corresponding to the hanging portion 654, so that when the plug a is inserted and deformed towards the longitudinal outside, the free end of the hanging portion 654 is electrically contacted with the contact 644, thereby implementing multi-path current transmission, and facilitating to improve the current carrying capacity of the socket reinforcement 60.

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

EXAMPLE III

Referring to fig. 19 to fig. 22, the present embodiment is one of the modified embodiments of the second embodiment, and the difference between the embodiments is that:

the support shoulder 4421 is provided with a notch groove 4429 recessed deeper at the position of the low groove 4423. The top of the lateral peripheral wall cover portions 64 need not project upwardly to form the contact pieces 644, but instead the longitudinally outer ends of the hook portions 654 extend outwardly and at least partially over the lateral peripheral wall cover portions 64, and the hook portions 654 further include lower contact portions 656 formed by punching downwardly at positions corresponding to the notch grooves 4429, the lower contact portions 656 being formed with a slanted contact surface 657 on the bottom surface thereof. The lower contact portion 656 is punched and torn downward at a portion of the hanging portion 654, and the hanging portion 654 is torn from the side near the elastic body arm 652 so that the inclined contact surface 657 faces the top end of the lateral peripheral wall covering portion 64.

When the plug a is inserted, the contact projections 653 on the resilient body arms 652 are forced to move longitudinally outward, forcing the inclined contact surfaces 657 longitudinally outward and into electrical contact with the top of the transverse peripheral wall cover portion 64. Thus, the same technical effects as those of the second embodiment can be achieved, that is, the current transmission path and the multiplexing circuit are shortened, and the problem of heat generation is reduced.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. 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 socket comprises a socket body, a socket terminal and a socket reinforcing piece, wherein the socket body comprises a bottom wall, a socket side wall formed by upwards protruding two longitudinal ends of the bottom wall, a socket guide part formed at the two transverse ends of the socket body and an island part formed by upwards protruding the bottom wall, the socket guide part comprises a plug guide part receiving cavity, a longitudinal peripheral wall located at the transverse outer side of the plug guide part receiving cavity and a pair of transverse peripheral walls located at the two longitudinal sides of the plug guide part receiving cavity, the socket reinforcing piece comprises a main body part covering the surface of the longitudinal peripheral wall, an elastic arm part covering the outer peripheral wall of the transverse peripheral wall from the two longitudinal sides of the main body part along the transverse direction and extending to the transverse peripheral wall close to one side of the plug guide part receiving cavity, the top of the elastic arm portion bends towards the longitudinal outer side and extends to form a hanging portion hung on the top surface of the transverse peripheral wall.

2. The board-to-board socket according to claim 1, wherein the lateral outer peripheral wall of the socket body includes a support shoulder and an elastic escape portion located inside the support shoulder in the longitudinal direction and communicating with the plug guide receiving cavity, the elastic arm portion is elastically deformable in the longitudinal direction by the elastic escape portion, and the hooking portion is hooked on the support shoulder.

3. The board-to-board socket according to claim 2, wherein said hooking portion includes a downward contacting portion formed to project downward, and a notch groove for avoiding said downward contacting portion is formed at a position of said supporting shoulder portion corresponding to said downward contacting portion, and when said elastic arm portion is pressed in a longitudinal direction outward, said downward contacting portion moves in a longitudinal direction outward and comes into contact with a tip end of said lateral peripheral wall covering portion.

4. The board-to-board socket according to claim 3, wherein, when viewed in a longitudinal section, a bottom end of said lower contact portion is lower than a top surface of said lateral peripheral wall, said lower contact portion is formed by being torn and bent downward from said hanging portion, a position of tearing of said hanging portion is longitudinally inward, and an inclined contact surface facing said lateral peripheral wall covering portion is formed on a bottom surface of said lower contact portion, and when said elastic arm portion is pressed in a longitudinally outward direction, said inclined contact surface is moved longitudinally outward to be in electrical contact with said lateral peripheral wall.

5. A board-to-board socket according to claim 4, wherein the base of the longitudinal peripheral wall covering is fixed as a solder tail to a printed circuit board, the transmission of current being conducted from the hook portion to the solder tail of the longitudinal peripheral wall covering.

6. The board-to-board socket according to claim 5, wherein a mounting step portion is formed on a longitudinal outer side of the support shoulder portion, the lateral peripheral wall covering portion extends over the mounting step portion, the support shoulder portion is formed at least at one end in the lateral direction with a communicating step portion communicating with the elastic escape portion, the elastic arm portion includes a tension portion bent from one end in the lateral direction of the lateral peripheral wall covering portion and extending over the communicating step portion, and an elastic body arm extending from the tension portion at least partially over the elastic escape portion in the lateral direction, and the hooking portion is bent outward from a tip end of the elastic body arm in the longitudinal direction and hooked over the support shoulder portion.

7. The board-to-board jack of claim 6, wherein said resilient body arm projects toward said plug guide receiving cavity to form a contact protrusion, said contact protrusion being at least partially located within said plug guide receiving cavity when viewed from above, said contact protrusion being in electrical contact with said plug reinforcement member, and the transmission of electrical current comprises the following two paths: one way is along the leg that contacts convex part, hitching part, contact piece, vertical periphery wall cover portion bottom, and another way is along the leg that contacts convex part, elastic body arm, taut portion, vertical periphery wall cover portion bottom, and two way current transmission path parallel transmission can effectively reduce the temperature rise.

8. The board-to-board socket according to claim 1, wherein both lateral ends of said island portion are provided with protected portions having a lower level than said island portion, and said socket reinforcement further comprises a central guide portion bent downward from a laterally inner side of said main body portion and extending to and covering said protected portions.

9. The board-to-board socket of claim 8 wherein said socket stiffener further includes a longitudinal peripheral wall cover portion bent downwardly laterally outwardly from said body portion and covering said longitudinal peripheral wall, said longitudinal peripheral wall cover portion being secured at a bottom portion thereof as a solder tail.

10. The board-to-board socket of claim 9, wherein said plug guide receiving cavity is formed with a through opening between said protected portion and a longitudinal peripheral wall, the central guide part comprises a first central guide arm bent downwards from the transverse inner side of the main body part and extending to the inner side surface of the longitudinal peripheral wall, a support bottom arm bent from the first central guide arm and extending to the bottom of the protected part along the through hole, and a second central guide arm bent from the support bottom arm and extending along the protected part, the protected part comprises a table-board part with the horizontal plane lower than that of the island part, an avoiding inclined plane formed by inclining downwards from the table-board part and a clamping groove formed by downwards sinking from the table-board part, the second central guide arm extends obliquely upwards along the avoiding inclined plane, and the tail end of the second central guide part is bent downwards to form a clamping end part clamped in the clamping groove.