CN210535861U

CN210535861U - Board-to-board connector

Info

Publication number: CN210535861U
Application number: CN201921756444.2U
Authority: CN
Inventors: 黄斌; 李明; 陈浩瀚; 陈宏基
Original assignee: Dongguan Luxshare Technology Co Ltd
Current assignee: Dongguan Luxshare Technology Co Ltd
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-05-15
Anticipated expiration: 2029-10-18

Abstract

A board-to-board connector includes a plug connector and a receptacle connector. The socket connector includes a printed circuit board and a plurality of conductive pads on an upper surface of the printed circuit board. The plug connector comprises an insulating body, a plurality of conductive terminals and a plurality of cables. The conductive terminal is accommodated in the insulating body and comprises a contact part, a welding part and a bending part, the bending part is positioned between the contact part and the welding part, the welding part is connected with the corresponding cable, and the contact part is exposed out of the insulating body and is elastically abutted against the corresponding conductive gasket through the corresponding bending part. The utility model discloses greatly reduced the board promoted the signal transmission performance between the board to the board connector to the time of board connector height.

Description

Board-to-board connector

Technical Field

The utility model relates to a board is to board connector, especially a high-speed transmission's board is to board connector.

Background

The board-to-board connector is a connector product with the strongest transmission capability in all connector product types at present, and is mainly applied to industries such as power systems, communication networks, financial manufacturing, elevators, industrial automation, medical equipment, office equipment, household appliances, military manufacturing and the like. A conventional board-to-board connector includes a receptacle connector and a plug connector that are mated with each other. The socket connector comprises a socket body and a plurality of socket terminals fixedly arranged in the socket body. The plug connector comprises a plug body and a plurality of plug terminals which are fixedly arranged in the plug body and the tail parts of which are connected with the cable. The socket body is provided with a butt joint surface matched with the plug connector and a mounting surface adjacent to the printed circuit board. And a pair of longitudinal side walls, a pair of transverse walls and a boss which is connected between the pair of transverse walls and is parallel to the longitudinal side walls are arranged between the butt joint surface and the mounting surface. The socket terminals are symmetrically arranged on two sides of the boss in two rows. Each socket terminal comprises a fixing part fixed in the longitudinal side wall, an elastic contact part bent and extended from one side of the fixing part into the boss and a welding part extended from the other side of the fixing part to the insulating body. The elastic contact portion forms an accommodating space of the plug terminal. Along with the market competition of the board-to-board connector is more intense, the board-to-board connector capable of realizing high-speed transmission through mutual butt joint of the socket connector and the plug connector occupies a certain space height, and is less and less not in accordance with the development trend of light, thin and small connector products.

Therefore, there is a need to provide a new board-to-board connector to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a board is to board connector, its to a great extent has reduced the product height.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a board-to-board connector comprises a plug connector and a socket connector, wherein the socket connector comprises a printed circuit board and a plurality of conductive gaskets on the upper surface of the printed circuit board, the plug connector comprises an insulating body, a plurality of conductive terminals and a plurality of cables, the conductive terminals are contained in the insulating body and comprise contact parts, welding parts and bent parts, the bent parts are located between the contact parts and the welding parts, the welding parts are connected with the corresponding cables, and the contact parts are exposed out of the insulating body and elastically abut against the corresponding conductive gaskets through the corresponding bent parts.

As the utility model discloses further modified technical scheme, including the posting, the posting includes vertical extension's vertical wall, from the vertical wall vertical direction on both ends towards a pair of vertical horizontal wall that the same direction was buckled and from this to the outer end lateral margin of vertical xarm along the vertical direction relative extension and reserve the interval, supply a pair of outer fender portion that the cable stretches out, vertical wall, this to vertical horizontal wall and this to the fender portion enclose the accommodating space who establishes formation plug connector, the bottom edge downwardly extending of posting two at least plugboards portions, the last jack that is equipped with of printed circuit board, the plugboard portion inserts to the jack in and is fixed in the posting on the printed circuit board.

As the utility model discloses further modified technical scheme, including the location clamping piece, the location clamping piece includes platelike basal portion and from a pair of ear of the both sides downward buckling of basal portion, and each ear all is equipped with screens portion, each vertical horizontal wall of location frame all is equipped with location portion, location portion and the cooperation of screens portion are fixed and with plug connector locking on printed circuit board.

As a further improved technical proposal of the utility model, the ear part is attached on the outer side of the vertical transverse wall relative to the containing space.

As a further improved technical solution of the present invention, the positioning portion is one of the convex hull and the through hole, and the positioning portion is the other of the convex hull and the through hole.

As a further improved technical scheme of the utility model, conductive terminal includes row's conductive terminal and lower conductive terminal, the contact site of going up conductive terminal and the contact site of lower conductive terminal are two rows of arrangements in same horizontal plane, the welding part of going up conductive terminal and the welding part of lower conductive terminal are two rows of arrangements in two different horizontal planes from top to bottom, the cable includes first cable and the second cable of two rows of arrangements from top to bottom, first cable is connected with the welding part electricity of going up conductive terminal, the second cable is connected with the welding part electricity of lower conductive terminal.

As the utility model discloses further modified technical scheme, every row of electricity conduction terminal all includes n +1 ground terminal and 2n signal terminal, n +1 ground terminal just the equidistance sets up side by side and forms n intervals, among 2n signal terminal, two are a set of, and n is organized totally, correspond respectively and set up in above-mentioned n intervals, and every row of cable is n, and each cable all includes two ground core and is located two signal core between two ground core, signal core and correspondence the signal terminal butt joint, ground core with corresponding ground terminal docks.

As a further improvement of the present invention, the conductive pads include a plurality of ground pads and a plurality of signal pads, the ground pads are disposed corresponding to the ground terminals, and the signal pads are disposed corresponding to the signal terminals.

As the utility model discloses the technical scheme of further improvement, each signal terminal's contact site is one, and each ground terminal's contact site is two, and the width of each ground terminal's welding part is greater than the width of each signal terminal's welding part.

As a further improved technical scheme of the utility model, first insulating block and the second insulating block that the plug connector set up from top to bottom including, first insulating block and second insulating block all include integrative horizontal extension's fixing portion and supporting part, the lower surface of fixing portion and the lower surface parallel and level of supporting part, the upper surface of fixing portion is higher than the upper surface of supporting part and forms the step portion, the welding part of going up conductive terminal is tiled downwards in the upper surface of the supporting part of first insulating block and the contact site of going up conductive terminal and is buckled downwards and extend the fixing portion of first insulating block on the upper surface of the supporting part of first insulating block side by side, the welding part of lower row conductive terminal is tiled downwards in the upper surface of the supporting part of second insulating block and the contact site of lower row conductive terminal is buckled downwards and is extended the fixing portion of second insulating block.

As a further improved technical scheme of the utility model, plug connector includes first, second, third metallic shield piece and grounding piece, the attached upper surface in first collets of first metallic shield piece, the attached upper surface in second collets of second metallic shield piece, the attached lower surface in second collets of third metallic shield piece, the grounding piece includes the horizontal part and the vertical portion of buckling from the horizontal part, the horizontal part centre gripping is between the upper surface of the lower surface of first collets and second metallic shield piece, vertical portion extends in the contact site of going up row conductive terminal and between the contact site of lower row conductive terminal.

As a further improved technical scheme of the utility model, printed circuit board is equipped with the locating hole, insulator's bottom is equipped with the reference column that the inlay is located the locating hole.

Compared with the prior art, the utility model discloses a printed circuit board with electrically conductive gasket is attached replaces the socket connector including socket ontology and socket terminal among the prior art, greatly reduced the board to the height of board connector, just the utility model discloses a socket connector need not the switching part of current socket connector terminal and circuit board circuit butt joint, consequently can also promote the signal transmission performance of board between to the board connector.

Drawings

Fig. 1 is a perspective assembly view of the board-to-board connector of the present invention.

Fig. 2 is a front view of the board-to-board connector of the present invention.

Fig. 3 is an exploded perspective view of the board-to-board connector of the present invention.

Fig. 4 is an enlarged view of a portion a in fig. 3.

Fig. 5 is an exploded perspective view of the plug connector of the board-to-board connector according to the present invention.

Fig. 6 is a partially exploded perspective view of the board-to-board connector of the present invention.

Fig. 7 is another exploded perspective view of the board-to-board connector of the present invention.

Fig. 8 is a front view of fig. 7.

Fig. 9 is a top view of fig. 7.

Detailed Description

Referring to fig. 1 to 9, the present invention relates to a board-to-board connector, which includes a plug connector 1 and a receptacle connector 2.

Referring to fig. 3, 5 to 9, the plug connector 1 includes an insulating body 11, a plurality of conductive terminals 12, and a plurality of cables 13.

Referring to fig. 6, the insulating housing 11 includes a base 111, a first side wall 112 and a second side wall 113 extending upward from the base 111 and disposed opposite to each other, and a third side wall 114 connecting the first side wall 112 and the second side wall 113, wherein an opening 115 is opposite to the third side wall 114.

Referring to fig. 7 to 9, the conductive terminal 12 is accommodated in the insulating body 11 and includes a contact portion 121, a soldering portion 122 and a bending portion 1211. The bent portion 1211 is located between the contact portion 121 and the welding portion 122. The soldering portion 122 is connected to the cable 13, and the contact portion 121 is exposed below the insulating body 11.

Referring to fig. 7 to 9, specifically, the conductive terminal 12 includes an upper row of conductive terminals 123 and a lower row of conductive terminals 124, the contact portions 121 of the upper row of conductive terminals 123 and the contact portions 121 of the lower row of conductive terminals 124 are arranged in two rows in a same horizontal plane, the soldering portions 122 of the upper row of conductive terminals 123 and the soldering portions 122 of the lower row of conductive terminals 124 are arranged in two rows in two different horizontal planes, the cable 13 includes a first cable 131 and a second cable 132 arranged in two rows, the first cable 131 is electrically connected to the soldering portions 122 of the upper row of conductive terminals 123, and the second cable 132 is electrically connected to the soldering portions 122 of the lower row of conductive terminals 124.

More specifically, each row of the conductive terminals 12 includes n +1 ground terminals 125 and 2n signal terminals 126, the n +1 ground terminals 125 are arranged side by side and at equal intervals to form n intervals, two of the 2n signal terminals 126 are a group, and n groups are correspondingly arranged in the n intervals respectively, each row of the cables 13 is n, each cable 13 includes two ground cores 133 and two signal cores 134 located between the two ground cores 133, the signal cores 134 are in one-to-one butt joint with the signal terminals 126, the ground cores 133 are welded to the ground terminals 125, except that the ground core 133 at the outermost side of each row is connected to a single ground terminal 125, and the rest two ground cores 133 adjacent to each other share one ground terminal 125. Namely: the specific arrangement of each row of conductive terminals 12 is as follows: the 1 st ground terminal-the 1 st signal terminal-the 2 nd ground terminal-the 3 rd signal terminal-the 4 th signal terminal- … … the nth ground terminal-the 2n-1 st signal terminal-the 2 nth signal terminal-the n +1 th ground terminal; the specific arrangement of each row of cables 13 is as follows: the 1 st ground core-the 1 st signal core-the 2 nd ground core-the 3 rd signal core-the 4 th ground core … … the 2n-1 th ground core-the 2n-1 st signal core-the 2n ground core. Further, the specific connection between the cable 13 and the conductive terminal 12 is as follows: the 1 st signal core is connected with the 1 st signal terminal, the 2 nd signal core is connected with the 2 nd signal terminal … … the 2 nd signal core is connected with the 2 nd signal terminal, except that the 1 st ground core is connected with the 1 st ground terminal and the 2n ground core is connected with the n +1 th ground terminal, the 2 nd ground core and the 3 rd ground core share the 2 nd ground terminal, the 4 th ground core and the 5 th ground core share the 3 rd ground terminal … … and so on, until the 2n-2 nd ground core and the 2n-1 nd ground core share the n th ground terminal.

One contact portion 121 of each signal terminal 126, two contact portions 121 of each ground terminal 125, and the width of the soldering portion 122 of each ground terminal 125 is greater than the width of the soldering portion 122 of each signal terminal 126. Since there is a case where two adjacent ground wire cores share one ground terminal except for the ground wire core at the outermost side of each row and a single ground terminal connected, in the specific embodiment, the width of the soldering portion of each ground terminal is twice as large as the width of the soldering portion of each signal terminal.

Referring to fig. 7 and 8, the plug connector 1 further includes a first insulating block 141 and a second insulating block 142 disposed above and below. The first insulating block 141 and the second insulating block 142 each include a holding portion 1401 and a supporting portion 1402 which are integrally and laterally extended, a lower surface of the holding portion 1401 is flush with a lower surface of the supporting portion 1402, and an upper surface of the holding portion 1401 is higher than an upper surface of the supporting portion 1402 to form a step portion 1403. The soldering portions 122 of the upper row of conductive terminals 123 are laid on the upper surface of the supporting portion 1402 of the first insulating block 141 side by side, the contact portions 121 of the upper row of conductive terminals 123 are bent downward to extend out of the holding portion 1401 of the first insulating block 141, the soldering portions 122 of the lower row of conductive terminals 124 are laid on the upper surface of the supporting portion 1402 of the second insulating block 142 side by side, and the contact portions 121 of the lower row of conductive terminals 124 are bent downward to extend out of the holding portion 1401 of the second insulating block 142.

Referring to fig. 7, in a preferred embodiment, the plug connector 1 further includes first, second, and third

metal shielding plates

151, 152, 153 and a grounding plate 16. The first metal shielding sheet 151 is attached to the upper surface of the first insulating block 141, the second metal shielding sheet 152 is attached to the upper surface of the second insulating block 142, and the third metal shielding sheet 153 is attached to the lower surface of the second insulating block 142. The ground plate 16 includes a horizontal portion 161 and a vertical portion 162 bent from the horizontal portion 161, the horizontal portion 161 is sandwiched between the lower surface of the first insulating block 141 and the upper surface of the second metal shielding plate 152, and the vertical portion 162 extends between the contact portion 121 of the upper row of conductive terminals 123 and the contact portion 121 of the lower row of conductive terminals 124.

Referring to fig. 5 and 6, the plug connector 1 further includes an insulating base 17 and a protective cover 18. The insulating base 17 is overmolded on the first insulating block 141, the grounding plate 16, the second metal shielding plate 152, the second insulating block 142, the third metal shielding plate 153, the soldering portion 122 of the conductive terminal 12, and the cable 13. The protective cover 18 is located above the first metal shielding plate 151 and clamped between the side surface of the insulating base 17 and the third side wall 114 of the insulating body 11. The cable 13 extends out of the insulating body 11 from the opening 115.

Referring to fig. 3 and 5, further, the plug connector 1 includes a metal housing 19 covered above the insulating body 11. The metal shell 19 includes a main body 191 and a pair of side portions 192 extending downward from both side edges of the main body 191, the middle portion of the base 41 is pressed downward to abut on the upper side of the main body 191, and the side portions 192 are wrapped on the outer sides of the first side wall 112 and the second side wall 113. The side portion 192 is stamped to form two elastic pieces 193 protruding outwards, and the elastic pieces 193 and the ear portion 42 are abutted inwards and outwards.

In the embodiment of the present invention, the socket connector 2 is a printed circuit board 21 and a plurality of conductive pads 22 on the upper surface of the printed circuit board 21. The printed circuit board 21 has a positioning hole 212, the bottom of the insulating body 11 has a positioning post 116 embedded in the positioning hole 212, so that the plug connector 1 is assembled on the receptacle connector 2, and the contact portion 121 of the conductive terminal 12 is elastically abutted to the conductive pad 22 of the printed circuit board 21 through the corresponding bending portion 1211 to transmit an electrical signal.

Referring to fig. 3 and 4, the conductive pads 22 correspond to the upper conductive terminals 123 and the lower conductive terminals 124 and can be divided into front and rear conductive pads 22, each row of conductive pads 22 includes a plurality of ground pads 221 and a plurality of signal pads 222, the ground pads 221 are disposed corresponding to the ground terminals 125, and the contact portions 121 of the ground terminals 125 can elastically abut against the corresponding ground pads 221 through the bending portions 1211; the signal pads 222 are disposed corresponding to the signal terminals 126, and the contact portions 121 of the signal terminals 126 can elastically abut against the corresponding signal pads 222 through the bent portions 1211. In the present embodiment, each two adjacent ground terminals 126 abut against a corresponding one of the ground pads 221, and each signal terminal 126 abuts against a corresponding one of the signal pads 222.

Referring to fig. 1 to 3, in order to keep the electrical signal stable, the present invention further includes a positioning frame 3 and a positioning clip 4 for fixing the plug connector 1 and the receptacle connector 2.

Referring to fig. 3, the positioning frame 3 includes a vertical wall 31 extending longitudinally, a pair of vertical transverse walls 32 bending from two ends of the vertical wall 31 in the longitudinal direction toward the same direction, and a pair of outer blocking portions 33 extending from outer end side edges of the pair of vertical transverse arms oppositely along the longitudinal direction with a space reserved for the cable 13 to extend out, and the vertical wall 31, the pair of vertical transverse walls 32, and the pair of outer blocking portions 33 enclose the accommodating space 30 forming the plug connector 1. The bottom edge of the positioning frame 3 extends downwards to form at least two insertion plate parts 34, the printed circuit board 21 is provided with insertion holes 211, and the insertion plate parts 34 are inserted into the insertion holes 211 to fix the positioning frame 3 on the printed circuit board 21.

Referring to fig. 3, the positioning clip 4 includes a plate-shaped base 41 and a pair of ears 42 bent downward from two sides of the base 41, each ear 42 has a positioning portion 421, each vertical lateral wall 32 of the positioning frame 3 has a positioning portion 321, and the positioning portions 321 and the positioning portions 421 are fixed in a matching manner to lock the plug connector 1 on the printed circuit board 21.

In a specific embodiment, the ear portion 42 is attached to the outer side of the vertical transverse wall 32 opposite to the accommodating space 30. The positioning portion 321 is one of a convex hull and a through hole, and the retaining portion 421 is the other of the convex hull and the through hole.

Namely, the utility model discloses a during plug connector 1 and socket connector 2 butt joint, only need to put into the accommodating space 30 that locating frame 3 formed with the plug connector 1 after the equipment, rethread location clamping piece 4 and the cooperation between the locating frame 3 with plug connector 1 and socket connector 2 hasp fixed can. The conductive pad 22 is located below the receiving space 30, so that the contact portion 121 of the conductive terminal 12 and the conductive pad 22 of the printed circuit board 21 are elastically pressed to each other, and thus the electrical signal can be stably transmitted.

The utility model discloses a printed circuit board 21 with attached electrically conductive gasket 22 replaces the socket connector that includes socket body and socket terminal among the prior art, has greatly reduced the height of board to board connector, and the socket connector of the utility model does not need the switching part of current socket connector terminal and circuit board circuit butt joint, consequently can also promote the signal transmission performance between the board to board connector; the utility model discloses a stable cooperation between plug connector 1 and the socket connector 2 can be realized promptly to the cooperation between location clamping piece 4 and the locating frame 3, simple structure, and the equipment is convenient.

The above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and the understanding of the present specification should be based on the technical people in the related art, for example, the descriptions of the directions such as "front", "back", "left", "right", "up", "down", etc., although the present specification has described the present invention in detail with reference to the above embodiments, the ordinary skilled in the art should understand that the technical people in the related art can still modify or substitute the present invention, and all the technical solutions and modifications thereof that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A board-to-board connector comprises a plug connector (1) and a socket connector (2), and is characterized in that: the socket connector (2) comprises a printed circuit board (21) and a plurality of conductive gaskets (22) on the upper surface of the printed circuit board (21), the plug connector (1) comprises an insulating body (11), a plurality of conductive terminals (12) and a plurality of cables (13), the conductive terminals (12) are contained in the insulating body (11) and comprise contact portions (121), welding portions (122) and bending portions (1211), the bending portions (1211) are located between the contact portions (121) and the welding portions (122), the welding portions (122) are connected with the corresponding cables (13), and the contact portions (121) are exposed out of the insulating body (11) and elastically abut against the corresponding conductive gaskets (22) through the corresponding bending portions (1211).

2. The board-to-board connector of claim 1, wherein: including locating frame (3), locating frame (3) including vertical wall (31) of longitudinal extension, from vertical wall (31) both ends on the longitudinal direction to a pair of vertical horizontal wall (32) of same direction buckling and from this pair of vertical xarm outer end lateral margin along longitudinal direction relatively extend and reserve interval, supply a pair of fender portion (33) that cable (13) stretched out, vertical wall (31), this pair of vertical horizontal wall (32) and this pair of fender portion (33) enclose establishes accommodating space (30) that form plug connector (1), the bottom edge downwardly extending of locating frame (3) is two at least board portions (34), be equipped with jack (211) on printed circuit board (21), board portion (34) insert in jack (211) and are fixed in on printed circuit board (21) locating frame (3).

3. The board-to-board connector according to claim 2, wherein: including location clamping piece (4), location clamping piece (4) include platelike basal portion (41) and from a pair of ear (42) of the both sides downward bending of basal portion (41), each ear (42) all are equipped with screens portion (421), each vertical horizontal wall (32) of locating frame (3) all are equipped with location portion (321), location portion (321) and screens portion (421) cooperation are fixed and lock plug connector (1) on printed circuit board (21).

4. The board-to-board connector according to claim 3, wherein: the ear part (42) is attached to the outer side of the vertical transverse wall (32) relative to the accommodating space (30).

5. The board-to-board connector according to claim 3, wherein: the positioning part (321) is one of a convex hull and a through hole, and the clamping part (421) is the other of the convex hull and the through hole.

6. The board-to-board connector of claim 1, wherein: the conductive terminals (12) comprise upper conductive terminals (123) and lower conductive terminals (124), the contact parts (121) of the upper conductive terminals (123) and the contact parts (121) of the lower conductive terminals (124) are arranged in two rows in the same horizontal plane, the welding parts (122) of the upper conductive terminals (123) and the welding parts (122) of the lower conductive terminals (124) are arranged in two rows in two different horizontal planes, the cable (13) comprises a first cable (131) and a second cable (132) which are arranged in two rows, the first cable (131) is electrically connected with the welding parts (122) of the upper conductive terminals (123), and the second cable (132) is electrically connected with the welding parts (122) of the lower conductive terminals (124).

7. The board-to-board connector of claim 6, wherein: every row of electricity conduction terminal (12) all includes n +1 ground terminal (125) and 2n signal terminal (126), n +1 ground terminal (125) are side by side and the equidistance sets up and form n intervals, in 2n signal terminal (126), two are a set of, n group altogether, correspond respectively and set up in above-mentioned n intervals, every row of cable (13) is n, and each cable (13) all includes two ground core (133) and is located two signal core (134) between ground core (133), signal core (134) with correspond signal terminal (126) dock, ground core (133) with correspond ground terminal (125) dock.

8. The board-to-board connector of claim 7, wherein: the conductive pads (22) include ground pads (221) and signal pads (222), the ground pads (221) are disposed corresponding to the ground terminals (125), and the signal pads (222) are disposed corresponding to the signal terminals (126).

9. The board-to-board connector of claim 7, wherein: the number of the contact portions (121) of each signal terminal (126) is one, the number of the contact portions (121) of each ground terminal (125) is two, and the width of the soldering portion (122) of each ground terminal (125) is larger than the width of the soldering portion (122) of each signal terminal (126).

10. The board-to-board connector of claim 6, wherein: the plug connector (1) comprises a first insulating block (141) and a second insulating block (142) which are arranged up and down, wherein the first insulating block (141) and the second insulating block (142) respectively comprise a holding part (1401) and a supporting part (1402) which are integrated and transversely extended, the lower surface of the holding part (1401) is flush with the lower surface of the supporting part (1402), the upper surface of the holding part (1401) is higher than the upper surface of the supporting part (1402) to form a step part (1403), the welding parts (122) of the upper row of conductive terminals (123) are flatly laid on the upper surface of the supporting part (1402) of the first insulating block (141) side by side, the contact parts (121) of the upper row of conductive terminals (123) are bent downwards to extend out of the holding part (1401) of the first insulating block (141), the welding parts (122) of the lower row of conductive terminals (124) are flatly laid on the upper surface of the supporting part (1402) of the second insulating block (142) side by side, and the contact parts (121) of the lower row A holding part (1401) of the edge block (142).

11. The board-to-board connector of claim 10, wherein: the plug connector (1) comprises a first metal shielding sheet, a second metal shielding sheet, a third metal shielding sheet (151, 152 and 153) and a grounding sheet (16), wherein the first metal shielding sheet (151) is attached to the upper surface of a first insulating block (141), the second metal shielding sheet (152) is attached to the upper surface of a second insulating block (142), the third metal shielding sheet (153) is attached to the lower surface of the second insulating block (142), the grounding sheet (16) comprises a horizontal portion (161) and a vertical portion (162) bent from the horizontal portion (161), the horizontal portion (161) is clamped between the lower surface of the first insulating block (141) and the upper surface of the second metal shielding sheet (152), and the vertical portion (162) extends between a contact portion (121) of an upper row of conductive terminals (123) and a contact portion (121) of a lower row of conductive terminals (124).

12. The board-to-board connector of claim 1, wherein: the printed circuit board (21) is provided with a positioning hole (212), and the bottom of the insulating body (11) is provided with a positioning column (116) embedded in the positioning hole (212).