CN111355060B

CN111355060B - Board-to-board socket

Info

Publication number: CN111355060B
Application number: CN202010176128.9A
Authority: CN
Inventors: 朱守力; 李亚勇; 彭鑫云
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: 2021-08-17
Anticipated expiration: 2040-03-13
Also published as: CN111355060A

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 and form socket side wall, be formed with the socket guide portion at the horizontal both ends of socket ontology and certainly the diapire makes progress the bulge and forms island portion, socket guide portion includes plug guide portion and receives the chamber, is located the vertical periphery wall in the horizontal outside in plug guide portion receiving chamber and being located a pair of horizontal periphery wall in the vertical both sides in plug guide portion receiving chamber, socket reinforcement including cover in the main part on vertical periphery wall surface, certainly the vertical both sides of main part extend along horizontal direction cover in the outer horizontal periphery wall of horizontal periphery wall cover portion and certainly the horizontal periphery wall covers the inside protection arm and the contact elastic arm that the extension formed in portion top.

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.

For solving the technical problem, the application provides a board to board socket, including socket ontology, socket terminal and socket reinforcement, socket ontology includes the diapire, certainly the vertical both ends of diapire upwards bulge the socket lateral wall that forms, form in the socket guide portion at the horizontal both ends of socket ontology, certainly the diapire upwards bulge form island portion and form in plug lateral wall between island portion and the socket lateral wall receives the chamber, socket guide portion includes plug guide portion and receives the chamber, is located vertical periphery wall in the horizontal outside of plug guide portion reception chamber and is located a pair of horizontal periphery wall in the vertical both sides of plug guide portion reception chamber, the socket reinforcement including cover in the main part on vertical periphery wall surface, certainly the vertical both sides of main part extend along horizontal direction cover in the outer horizontal periphery wall portion of horizontal periphery wall and certainly the horizontal periphery wall top is covered an inwards turn over the protection arm that extends the formation and contact protection arm that turns over with the contact And the elastic arm is vertically closer to the plug guide part receiving cavity than the upper end of the contact elastic arm is, and the lower end of the contact elastic arm is closer to the plug guide part receiving cavity than the lower end of the protection part.

Preferably, socket ontology's horizontal periphery wall is including supporting the shoulder and being located support the vertical inboard intercommunication of shoulder the portion is dodged to the elasticity of plug guide portion receiving chamber, the guard arm with contact spring arm certainly horizontal periphery wall covers a top and turns over to roll over and stride after supporting the shoulder elasticity dodge a top slant plug guide portion receiving chamber extends.

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

Preferably, the protection arm includes a bending protection portion formed by folding from the top end of the covering portion of the transverse peripheral wall toward the plug guide receiving cavity, a first extending protection portion formed by extending from the lower side of the bending protection portion to the plug guide receiving cavity, and a second extending protection portion formed by extending from the free end of the first extending protection portion downward.

Preferably, the contact elastic arm includes from horizontal periphery wall cover portion top court plug guide portion receiving cavity turns over the bending that forms and stridees across the portion, certainly bend and stride across the extension arm that a free end downwardly extending formed and certainly extension arm free end slant plug guide portion receiving cavity slope extends the contact portion that forms, from last down observation, contact portion at least part is located plug guide portion receiving cavity, and the definition extends the contained angle between the angle for extending body and horizontal perpendicular.

Preferably, an extension angle of the first extended guard is greater than an extension angle of the extension arm to bring the first extended guard closer to the plug guide receiving cavity.

Preferably, the second extended guard portion has an extension angle less than that of the contact portion to bring the contact portion closer to or into the plug guide receiving cavity.

Preferably, the second extended protection portion extends at a vertically downward angle or is folded over from the first extended protection portion free end towards the support shoulder.

Preferably, the contact portion has an extension angle greater than the extension angle of the extension arm to allow the contact portion to more quickly approach or enter the plug guide receiving cavity at a shorter extension distance, and the first extension guard has an eye angle greater than the extension angle of the second extension guard to allow the first extension guard to more quickly approach the plug guide receiving cavity at a shorter extension distance.

Preferably, the top end of the support shoulder is respectively provided with an avoiding inclined plane at two longitudinal sides, so as to be more beneficial to the folding of the protection arm and the contact elastic arm.

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.

The application is to board socket, through the inside bending in horizontal periphery wall of socket reinforcement cover portion top forms the fender arm and the elastic contact arm that are used for guide and electric connection respectively, the fender arm guide protection the inserting of plug reinforcement can not damage socket or plug.

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 to 25 are drawings illustrating a third embodiment of the board-to-board connector assembly according to the present application:

FIG. 19 is a perspective view of an embodiment three-plate to plate socket and an enlarged view of a portion thereof;

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 perspective view of an alternate angle of the receptacle reinforcement of the three-plate to plate receptacle of the embodiment;

FIG. 23 is a side view of a socket stiffener for an embodiment three-plate to plate socket;

FIG. 24 is a front or rear view of a socket stiffener for an embodiment three-plate to plate socket;

figure 25 is a top view of a socket stiffener for an embodiment three-plate to plate socket.

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 25, the plug a of the first embodiment is identical to the plug of the second embodiment, and the socket B is different from the socket a in that there is a partial difference in the socket guide portion 44, and the structure of the socket reinforcing member 60 is not identical.

In the third embodiment, the support shoulder 4421 of the socket guide portion 44 of the socket body 40 is formed with the avoiding inclined surface 4429 at 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 avoiding portion 4424 do not need to be communicated with each other through the communication step 4426, that is, the communication step 4426 is eliminated. The remaining structure of the socket step 44 is consistent with the embodiments.

The socket reinforcing member 60 of the third embodiment includes, in addition to the body portion 61, the central guide portion 63, the longitudinal peripheral wall covering portion 62, and the lateral peripheral wall covering portion 64 as in the first embodiment. And a protective arm 68 and a contact spring arm 69 formed by folding and extending inward and downward from the top end of the lateral peripheral wall covering portion 64.

The guard arm 68 is formed by bending and extending the top of the free end of the lateral peripheral wall cover portion 64 toward the longitudinal inner lower direction, and the contact spring arm 69 is formed by bending and extending the top end of the lateral peripheral wall cover portion 64 between the guard arm 68 and the body portion 61 toward the longitudinal inner lower direction.

The protection arm 68 includes a bent protection portion 681 bent from the top of the lateral peripheral wall covering portion 64 toward the longitudinal inside and spanning the support shoulder portion 4421, a first extended protection portion 682 formed to extend obliquely downward from the bent protection portion 681, and a second extended protection portion 683 formed to extend continuously obliquely downward from the first extended protection portion 682 and located above the elastic escape portion 4424. The first extended guard 682 and the second extended guard 683 are not extended at the same angle, and the extended angle of the first extended guard 682 is greater than that of the second extended guard 683, so that the first extended guard 682 approaches the plug guide receiving cavity 443 more quickly with a shorter extended length than the second extended guard 683. The extending angle is defined as the angle between the first and second extending

protection portions

682 and 683 and the vertical direction. The first extended protection segment 682 also extends in a direction away from the main body 61.

The elastic contact arm 69 includes a bent spanning portion 691 bent from the top of the lateral peripheral wall covering portion 64 toward the longitudinal inner side and spanning the support shoulder portion 4421, an extension arm 692 formed to extend obliquely downward from the bent spanning portion 691, and a contact portion 693 formed to extend continuously obliquely downward from the extension arm 692 and located at least partially within the plug guide receiving cavity 443. The extension arms 692 do not have the same extension angle as the contact portions 693, and the extension angle of the extension arms 692 is smaller than the extension angle of the contact portions 693, i.e., so that the extension arms 692 approach the plug guide receiving cavity 443 more slowly than the contact portions 693 with a shorter extension length. The extension arm 692 and the contact portion 693 extend obliquely to the protection arm 68.

Meanwhile, the extension angle of the extension arm 692 is smaller than that 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 contact portion 693 extends at an angle greater than that of the second extended protection portion 683 to bring the contact portion 693 closer to or into the plug guide receiving cavity 443. In the state where the plug a is not inserted, the free end of the contact portion 693 is located entirely or at least partially in the plug guide receiving cavity 443, and the free end of the second extended protection portion 683 of the protection arm 68 is located entirely or at least partially above the elastic avoiding portion 4424, as viewed from the top.

The horizontal position of the tip of the bending spanning part 691 is not higher than the tip of the bending protection part 681 of the protection arm 68, and preferably, the tip of the bending spanning part 691 is lower than the tip of the bending protection part 681.

During the insertion of the plug a into the socket B, the connecting end edge of the laterally outer side surface covering portion 33 of the plug reinforcement 30 and the covering base portion 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 being guided by the first extension protection portion 682, and at this 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 extension protection portion 682, and the extension arm 692 does not need to guide the plug reinforcement 30. After the plug reinforcing member 30 is guided by the first extension protecting portion 682, the insertion position of the plug a is not substantially deviated, the guiding function of the second extension protecting portion 683 is weakened, and the contact portion 331 of the lateral outer face covering portion 33 is positioned to elastically contact the contact portion 693. After the plug a is buckled, the elastic contact arm 69 deforms on the elastic avoiding portion 4424 toward the support shoulder 4421, and the contact portion 693 is at least partially pressed above the elastic avoiding portion 4424. The protection arm 68 does not come into contact with the header reinforcement 30. The transmission of the current is transmitted to the printed circuit board via the contact portions 331 of the plug reinforcement 30, the resilient contact arms 69, the longitudinal peripheral wall covering portions 64.

The avoiding inclined surfaces 4429 on both sides of the top end of the support shoulder 4424 in the longitudinal direction allow the bending protection part 681 and the bending spanning part 691 of the protection arm 68 and the elastic contact arm 69 to be bent at a small included angle and to be in a support state of the support shoulder 4421.

In the board-to-board connector assembly of the present embodiment, the protection arms 68 and the elastic contact arms 69 are formed by bending inward the top of the transverse peripheral wall covering portion 64 of the socket stiffener 60, respectively, for guiding and electrically connecting, and the protection arms 68 guide and protect the insertion of the plug stiffener 30 without damaging the socket B or the plug.

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

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, and is characterized in that the 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 reinforcing piece comprises a main body part covering the surface of the longitudinal peripheral wall, a transverse peripheral wall covering part covering the outer transverse peripheral wall of the transverse peripheral wall and a protection arm and a contact elastic arm which are formed by inwards turning over and extending the top end of the transverse peripheral wall covering part, the upper end of the protection arm is closer to the plug guide receiving cavity than the upper end of the contact elastic arm, and the lower end of the contact elastic arm is closer to the plug guide receiving cavity than the lower end of the protection arm.

2. The board-to-board jack of claim 1, wherein said lateral peripheral wall of said jack body includes a support shoulder and a resilient relief portion located longitudinally inward of said support shoulder and communicating with said plug guide receiving cavity, said guard arm and contact spring arm extending obliquely above said plug guide receiving cavity after being folded over from a top end of said lateral peripheral wall covering portion across said support shoulder.

3. The board-to-board socket of claim 2 wherein a mounting step is formed longitudinally outboard of said support shoulder, said transverse peripheral wall cover extending over said mounting step.

4. The board-to-board jack of claim 3, wherein said shield arm includes a bent shield portion formed by folding back from a top end of said lateral peripheral wall cover portion toward said plug guide receiving cavity, a first extended shield portion formed by extending from below said bent shield portion obliquely to said plug guide receiving cavity, and a second extended shield portion formed by extending downward from a free end of said first extended shield portion.

5. The board-to-board socket of claim 4 wherein said contact spring arm includes a bent spanning portion formed by folding from a top end of said transverse peripheral wall covering portion toward said plug guide receiving cavity, an extension arm formed by extending downwardly from a free end of said bent spanning portion, and a contact portion formed by extending obliquely from a free end of said extension arm toward said plug guide receiving cavity, said contact portion being at least partially located within said plug guide receiving cavity when viewed from above, defining an extension angle as an included angle between the extension body and a transverse vertical plane.

6. The board-to-board socket of claim 5, wherein the first extended guard has an extension angle greater than the extension angle of the extension arm to bring the first extended guard closer to the plug guide receiving cavity.

7. The board-to-board socket of claim 6, wherein the second extended guard portion has an extension angle that is less than the extension angle of the contact portion to bring the contact portion closer to or into the plug guide receiving cavity.

8. The board-to-board socket of claim 6, wherein the second extended guard extends at a vertically downward angle or is folded over from the first extended guard free end to extend toward the support shoulder.

9. The board-to-board socket of claim 5, wherein the contact portion has an extension angle greater than the extension angle of the extension arm to allow the contact portion to more quickly approach or enter the plug guide receiving cavity at a shorter extension distance, and the first extension guard has an extension angle greater than the extension angle of the second extension guard to allow the first extension guard to more quickly approach the plug guide receiving cavity at a shorter extension distance.

10. The board-to-board socket according to claim 5, wherein the top end of said support shoulder is formed with relief slopes on both longitudinal sides to facilitate folding of said protection arm and contact spring arm.

11. 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.