TW202131557A - Electrical connector - Google Patents

Abstract

An electrical connector can be mounted on the circuit board and can be mated with a mating electrical connector, comprising: a plurality of terminal modules stacked laterally, each of the terminal modules includes: an insulating housing; a plurality of signal terminals held in the insulating housing, and a plurality of ground terminals held in the insulating housing, two adjacent signal terminals are arranged in pair, ground terminals are provided on both sides of each signal terminal pair in a longitudinal direction, wherein the signal terminals are arranged in the same plane, and the ground terminals are arranged in a plane different from the same plane, the ground terminals on both sides of the signal terminal pair are mechanically and electrically connected to each other.

Description

Electrical connector

The invention relates to an electrical connector, in particular to a high-speed backplane connector used in the communication field.

For example, the US Patent No. 6,988,902 issued on January 24, 2006 discloses a combination of a plug electrical connector and a socket electrical connector, wherein the plug electrical connector and the socket electrical connector both include several rows of terminals, The terminals in each column include differential signal pairs and grounding terminals arranged between adjacent differential signal pairs. Each differential signal pair in each column is staggered from the corresponding differential signal pair in adjacent columns. There is no metal shield, although the crosstalk can be reduced to a certain extent through the misalignment of the differential pair, and the transmission of lower differential signals of 6Gbps and below can be realized, but with the increase of the differential signal transmission rate, many The transmission speed of the differential signal has reached 25Gbps, and even higher has reached 56Gbps. Therefore, it is difficult to meet the transmission of high-speed signals by a simple misalignment setting.

Therefore, there is a need for an improved electrical connector that can transmit differential signal transmissions of 56 Gbps or higher.

The technical problem to be solved by the present invention is to provide an electrical connector with a high transmission rate and a simple and reliable structure.

In order to solve the above problems, the present invention can adopt the following technical solutions: an electrical connector, which is used to be mounted on a circuit board and can be matched with a mating connector, the electrical connector includes a plurality of laterally arranged terminal modules, each Each of the terminal modules includes an insulating body, a number of signal terminals held in the insulating body, and a number of ground terminals Each of the signal terminal pairs is provided with ground terminals, wherein each of the signal terminals is arranged in the same plane, each of the ground terminals is arranged in a plane different from the same plane, and each of the signal terminal pairs is two The ground terminals on the side are mechanically and electrically connected to each other.

Compared with the prior art, the electrical connector of the present invention reduces the problem of crosstalk between adjacent signal terminal pairs by mechanically and electrically connecting the ground terminals on both sides of the signal terminal pair. The stable transmission of the signal provides better conditions.

Referring to the first to fifteenth figures, the electrical connector assembly 100 of the present invention includes a first electrical connector 1 and a second electrical connector 2 that cooperates with the first electrical connector 1. The first electrical connector An electrical connector 1 is mounted on the first circuit board 3, the second electrical connector 2 is mounted on the second circuit board 4, and the first electrical connector 1 and the second electrical connector 2 are mated Its transmission rate per channel can reach 112Gbps or even higher.

The first electrical connector 1 includes an insulating housing 10, a plurality of terminals 20 fixed on the insulating housing 10, and a shielding sheet 30 fixed on the insulating housing 10 to cover the terminals.

The insulating housing 10 includes a bottom wall 11 and a pair of side walls 12 extending from the same side of the bottom wall 11 and spaced apart from each other. The bottom wall 11 and the two side walls 12 jointly enclose a receiving space 13. The bottom wall 11 includes a plurality of mounting holes 111 arranged in rows and columns and penetrating the bottom wall 11 for mounting the terminals 20 and the shielding sheet 30. The bottom wall 11 is provided with a plurality of supporting walls 113 protruding toward the receiving space 13 for supporting the terminal 20, and each supporting wall 113 includes two grooves 115. The side wall 12 is provided with a guide bar 121 that guides the second electrical connector 2 to be accurately inserted into the accommodating space 13.

The terminals 20 are mounted on the bottom wall 11 of the insulating housing 10 in several rows and several columns, and each of the terminals 20 includes a holding portion 21 for holding on the bottom wall 11, downward from the holding portion 21 The extended bottom wall 11 is used for a mounting portion 23 mounted on the first circuit board 3, a cantilever 25 extending upward from the holding portion 21 into the receiving space 13, and a contact portion 251 located at the front of the cantilever 25. The cantilever 25 is provided with a slot 253, and the slot 253 extends to the contact portion 251. The periphery of the slot 253 is completely enclosed in the terminal 20. The cantilever 25 is received in the channel 115. By providing a slot extending to the contact portion on the terminal 20, the contact area of the terminal is reduced, thereby reducing the capacitance effect, thereby improving the impedance matching of the entire transmission path. The mounting portion 23 includes mounting feet 231 having a fish-eye hole structure. The terminals 20 are formed by punching and bending a flat metal material. Each terminal 20 includes a wide side on the surface of the flat metal plate and a narrow side blanked from the flat material. The narrow sides on both sides are provided with barbs 211 protruding to the corresponding outer side, and the wide side is provided with wide barbs 215 protruding from the wide side, and the wide barbs 215 are torn out from the wide side. Each of the terminals 20 is installed in the installation hole 111 on the bottom wall 11 and fixed on the bottom wall 11 through a barb 211 and a wide barb 215. Two adjacent terminals 20 form a terminal pair 22 for transmitting a pair of differential signals. The two terminals 20 forming the terminal pair 22 are all coupled with a narrow side from the mounting portion 23 to the contact portion 251. The distance from the center of the contact portion 251 of one terminal 20 of the terminal pair 22 to the center of the contact portion 251 of the other terminal 20 is the first dimension, and the center of the mounting portion 23 to the center of the mounting portion 23 of the other terminal 20 The distance between the two is a second size, and the first size is smaller than the second size, so as to reduce the signal crosstalk between the terminal pair 22 and the adjacent terminal pair 22.

The mask sheet 30 is formed by punching and bending a sheet metal material. The mask sheet 30 includes a main wall 31 and a pair of side walls 33 extending in the same direction from both sides of the main wall. The main wall 31 and the two side walls 33 enclose an area in three directions. The terminal pair 22 shields the terminal pair 22 from the other terminal pairs 22. The main wall 31 is parallel to the wide sides of the terminal pair 22 that it covers, and the pair of side walls 33 are respectively opposite to the corresponding narrow sides of the terminal pair 22. In this embodiment, the side of the mask sheet 30 facing the terminal pair surrounded by it is defined as the inner side, and the side opposite to the inner side is defined as the outer side. Each side wall 33 includes a contact elastic piece 331, each of the contact elastic pieces 331 includes a contact protrusion 333, the contact elastic piece 331 extends inwardly, and the contact protrusion 333 protrudes inwardly. The mask sheet 30 includes a main body 310, a first mounting portion 311 extending downward from the main body 310 for mounting on the first circuit board 3, and a first mating portion extending upward from the main body 310 into the accommodating space 13 313. The mask sheet 30 is directly fixed on the bottom wall 11 through the main body 310. The contact elastic piece 331 is integrally formed by stamping from the first mating portion 313. The size of the first mating portion 313 extending into the receiving space 13 is larger than the size of the contact portion 251 of the terminal 20 extending into the receiving space 13. Each side wall 33 includes a ground pin 317.

The second electrical connector 2 includes a housing 40, a plurality of terminal modules 50 installed in the housing 40 and aligned laterally, and a holder 49 for fixing the terminal modules 50, each of the terminal modules 50 includes The insulating body 60, a plurality of signal terminals 70 fixed in the insulating body 60, a plurality of ground terminals 80 fixed in the insulating body 60, and a ground plate 90 on the side of the terminal module 50.

The housing 40 includes a base 41 with a front mating surface 401, an upper wall 413 and a lower wall 414 extending rearward from the base 41, and a pair of connecting walls 416 connecting the upper and lower walls. The upper wall 413 and the lower wall The 414 and a pair of connecting walls 416 jointly enclose a receiving cavity 43. The front parts of the plurality of terminal modules 50 are received in the receiving cavity 43 from back to front. The base 41 includes positioning grooves 421 on the outer surfaces of the upper wall 413 and the lower wall 414. The positioning slot 421 is used to cooperate with the guide bar 121 on the first electrical connector 1. The lower wall 414 and the upper wall 413 are provided with a plurality of guide grooves 431 aligned with the terminal modules 50 on the side of the receiving cavity, wherein the guide grooves 431 on the upper wall 413 include the guide grooves 431 that penetrate the upper wall的孔433. The base 41 includes a plurality of alignment holes 415 penetrating the front mating surface 401 and the receiving cavity 43 for receiving the mating terminals 20 and the shielding pieces 30 on the first electrical connector 1.

The insulating body 60 is in the shape of a sheet, and includes a lower edge 61 facing the installation direction, an upper edge 62 opposite to the lower edge 61, a front edge 63 facing the butting electrical connector, and a rear edge disposed opposite to the front edge 63 64. The rear edge 64 is provided with a retaining rib 641, and the retaining member 49 includes a retaining hole 494 for receiving the corresponding retaining rib 641. Therefore, each terminal module 50 passes through the retaining member 49 and the housing 40 to achieve It is fixed as one body in horizontal alignment. The insulating body 60 has a first side surface 66 and a second side surface 67 opposite to each other in the thickness direction thereof, and a plurality of installation grooves 662 are provided on the first side surface 66. The outer surface of the insulating body 60 is coated with a layer of absorbing material.

The signal terminals 70 are integrally formed in the insulating body 60. The signal terminals 70 are arranged in the form of signal terminal pairs 710. Each signal terminal pair 710 is used to transmit a pair of differential signals. The terminal 70 includes a mating end 73 extending from the insulating body 60 in the mating direction, a mounting end 74 extending from the insulating body 60 in the mounting direction and capable of being mounted on the second circuit board 4, and the mounting end 74 and the mating end 73之间中部75。 Between the middle part 75. The mating end 73 is perpendicular to the mounting end 74. Each of the signal terminals 70 includes a wide side and a narrow side. The wide sides of the signal terminal pair 710 are arranged on the same plane, and the signal terminal pair 710 is coupled with a narrow side from the mounting end 74 to the mating end 73. The insulating body 60 is provided with an air gap 721 for exposing the signal terminal 70 to the air. The air gap 721 can be provided only on one side of the insulating body 60 or on both sides of the insulating body 60. The signal terminal 70 at the position of the air gap 721 is exposed to the air, and the capacitance effect is adjusted by the dielectric constant of different materials to improve its characteristic impedance to meet 80-100 ohm. It can also be implanted at the opening position. The insulating body 60 is made of materials with different dielectric constants or an electrical component is implanted to adjust the capacitance effect.

The grounding terminal 80 includes a grounding mating end 83 that cooperates with the first electrical connector 1, a grounding mounting end 84 mounted on the second circuit board, and a transition portion 85 between the grounding mounting end 84 and the grounding mating end 83. Each ground terminal 80 is installed in a corresponding installation groove 662 on the insulating body 60. In the vertical direction, ground terminals 80 are provided on both sides of each of the differential signal terminal pairs 710. The connection between the grounding mating end 83 and the transition portion 85 is provided with a connecting piece 851 that connects the grounding terminals 80 on both sides of the signal terminal pair 710 together, and the connecting piece 851 is integrated with the two grounding terminals 80 connected to it. Stamped. The ground mounting end 84 extends beyond the mounting end 74 of the signal terminal 70. Each of the ground terminals 80 includes a wide side and a narrow side. The wide side of each ground terminal 80 is arranged in a plane perpendicular to the plane where the wide side of the differential signal terminal pair 710 is located. The middle portion 75 of the signal terminal 70 is arranged in a serpentine shape in the direction of the wide side of the ground terminal 80. The purpose is to realize the equal length of the physical structure of the signal terminal pair 710, and then realize the equal length of the electrical structure to reduce The deviation of signal transmission is less than 0.20 picoseconds (ps). In this embodiment, each of the terminal modules 50 includes two signal terminal pairs 710, and both sides of each of the signal terminal pairs 710 include a pair of ground terminals 80 connected to each other by a connecting member 851. The ground terminals 80 are connected to each other through the connection member 851 to reduce crosstalk between adjacent signal terminal pairs 710. The ground terminal 80 is in contact with the absorbing material on the insulating body 60, so as to shield the signal terminal pair 710 and the adjacent signal terminal pair 710 while absorbing invalid electromagnetic waves in the signal transmission process, thereby improving the crosstalk and the signal transmission process. Noise. After the first electrical connector 1 and the second electrical connector 2 are mated, the terminal pair 22 and the corresponding signal terminal 70 are matched with each other to form a signal path. The contact protrusions 333 on the contact elastic pieces 331 on the shield piece 30 of the shield terminal pair 22 cooperate with the outer side of the ground mating end 83 of the corresponding ground terminal 80 to shield the terminal pair in the entire path 22 and the signal path formed by the corresponding signal terminal pair 710, and has a better effect of shielding electromagnetic crosstalk.

The ground plate 90 is installed on the first side 66 of the insulating body 60, the ground plate 90 and the connecting piece 851 are arranged on the same side of the insulating body 60, and the connecting piece 851 is located on the connecting piece along the butting direction. The front of floor 90. The insulating body 60 is provided with a clamping slot 665, and the ground plate 90 is provided with a clamping piece 95 that matches with the clamping slot 665. The ground plate 90 is mechanically and electrically connected to the ground terminal 80 through other processes such as assembly or welding, and the distance between the ground terminal 80 and the ground plate 90 in the lateral direction is less than 0.2 mm to reduce signal leakage and affect phase Signal transmission between adjacent signal terminal pairs 710 prevents EMI.

The plurality of terminal modules 50 includes a first terminal module 51 and a second terminal module 52 that cooperates with the first terminal module 51, the first terminal module 51 and the second terminal module 52 They are combined with each other through positioning holes and positioning posts. In the lateral direction, the signal terminal pairs 710 in the first terminal module 51 and the second terminal module 52 are arranged in a staggered arrangement at the mounting end 74 and the mating end 73 to improve the anti-interference of signal transmission ability. The upper edge 62 and the lower edge 61 of the insulating body 60 of the first terminal module 51 are respectively provided with first guiding bosses 511, and the upper edge of the insulating body 60 of the second terminal module 52 is The edge 62 and the lower edge 61 are respectively provided with a second guide boss 521, and the first guide boss 511 on each of the upper edges 62 is provided with a first protrusion 513, and each of the upper edges 62 The second guide boss 521 is provided with a second protrusion 523, the first guide boss 511 and the second guide boss 521 are combined with the upper wall 413 and the upper wall of the housing 40 The corresponding guide groove 431 on the lower wall 414 is matched, and the first protrusion 513 and the second protrusion 523 are the same corresponding hole 433 of the upper wall 413 of the housing 40. Cooperate.

Refer to Figures 16 to 17 for another embodiment of the first electrical connector of the present invention. Compared with the first embodiment, the first electrical connector 1'of this embodiment further includes a fixing block 200, the terminal pair 22' and the shield sheet 30' are integrally formed and fixed to the fixing block 200. The outer surface of the fixed block 200 is coated with a wave absorbing material 201 to absorb invalid electromagnetic waves during signal transmission and improve crosstalk and noise during signal transmission. The mounting hole 111' on the bottom wall 11' cooperates with the fixing block 200 to fix the pair of terminals 20' and the shielding piece 30' that covers the pair of terminals 20' to the bottom wall 11'. In another embodiment of the present invention (not shown), the terminal pair 22' is integrally formed and fixed to the fixing block 200 and then mounted on the bottom wall by the fixing block 200, and the shielding sheet 30' Installed on the bottom wall 11'.

Referring to Figures 18 and 19, this is another embodiment of the second electrical connector 2'of the present invention. Compared with the first embodiment, in this embodiment, the signal terminal 70' and the The ground terminals 80' are integrally formed with the insulating body 60'. The broad sides of the ground terminal 80' are arranged in different planes, specifically, the ground terminals 80 located on both sides of the signal terminal pair 710' in the column direction in the same terminal module 50 There is a narrow-side coupling between the transition portion 85' and the intermediate portion 75' of the signal terminal 70', and the mounting end 74' of the signal terminal 70' and the ground terminal 80' There is a narrow-side coupling between the ground mounting ends 84'. The mating end 73' of the signal terminal pair 710' and the ground mating end 83' of the ground terminal 80' are coupled by a narrow side to a wide side.

It should be pointed out that the above descriptions are only part of the embodiments of the present invention, not all of them. Any equivalent changes made to the technical solutions of the present invention by those of ordinary skill in the art by reading the description of the present invention are all of the present invention. Covered by the request.

100: Electrical connector assembly 1: The first electrical connector 2: The second electrical connector 3: The first circuit board 4: The second circuit board 10: Insulating shell 20: Terminal 30: Mask sheet 11: bottom wall 12: side wall 13: Containment space 111: mounting hole 113: Support Wall 115: Groove 121: guide strip 21: Holding part 23: Installation Department 25: Cantilever 251: Contact 253: Slotting 231: Mounting feet 211: Barb 215: wide barb 22: terminal pair 31: Main Wall 33: side wall 331: contact shrapnel 333: contact bump 310: main body 311: The first installation part 313: The first docking part 317: Ground pin 40: shell 50: terminal module 19: Holder 60: Insulating body 70: signal terminal 80: Ground terminal 90: Ground plate 413: upper wall 41: Matrix 414: Bottom Wall 416: connecting wall 43: Containment Chamber 421: positioning slot 431: guide slot 415: Alignment hole 61: bottom edge 62: upper edge 63: Leading Edge 64: trailing edge 641: Card Holder 494: Snap Hole 662: installation slot 710: Signal terminal pair 73: Butt end 74: Mounting side 75: middle part 721: air gap 83: Grounding mating terminal 84: Grounding installation end 85: Transition 851: connector 665: card slot 95: card holder 51: The first terminal module 52: The second terminal module 511: The first guiding boss 521: The second guiding boss 513: first bump 523: second bump 433: hole

The first figure is a perspective view of the first electrical connector and the second electrical connector of the connector assembly of the present invention. The second figure is a perspective view of the first electrical connector and the second electrical connector of the first figure before mating. The third figure is a perspective view from another perspective before the first electrical connector and the second electrical connector of the second figure are mated. The fourth figure is a partial exploded view of the first electrical connector of the first figure. The fifth figure is a perspective view of a terminal pair of the first electrical connector of the fourth figure. Figure 6 is a front view of a terminal of the first electrical connector in Figure 4. The seventh figure is a partial exploded view of the second electrical connector of the first figure. Figure 8 is a partially exploded view of the second electrical connector of Figure 7 from another perspective. Figure 9 is a partial exploded view of the second electrical connector of Figure 8 from another perspective. The tenth figure is a partial exploded view of the first terminal module and the second terminal module of the second electrical connector of the ninth figure. The eleventh figure is a partial exploded view of the terminal module of the tenth figure. The twelfth figure is a further exploded view of the terminal module of the eleventh figure. Figure 13 is a further exploded view of the terminal module of Figure 12 in another direction. The fourteenth figure is a cross-sectional view along the XIV-XIV direction when the connector assembly of the first figure is in a mated state. The fifteenth figure is a cross-sectional view along the XV-XV direction when the connector assembly of the first figure is in a mated state. Figure 16 is a partial exploded view of the second embodiment of the first electrical connector of the connector assembly according to the present invention. The seventeenth figure is a further exploded view of some components of the first electrical connector of the sixteenth figure. Figure 18 is an exploded view of the first terminal module and the second terminal module that are mated with each other of the second electrical connector of the connector assembly according to the present invention. The nineteenth figure is a three-dimensional view of the ground terminal and the signal terminal of the terminal module of the eighteenth figure in cooperation with the butt connection.

without

51: The first terminal module

73: Butt end

75: middle part

721: air gap

60: Insulating body

83: Grounding mating terminal

84: Grounding installation end

74: Mounting side

80: Ground terminal

90: Ground plate

851: connector

52: The second terminal module

Claims (10)

An electrical connector, which is used to be installed on a circuit board and can be matched with a mating connector. The electrical connector includes a plurality of laterally arranged terminal modules. A number of signal terminals in the body and a number of ground terminals held in the insulating housing, two adjacent signal terminals are arranged as signal terminal pairs, and ground terminals are provided on both sides of each signal terminal pair in the vertical direction , Wherein each of the signal terminals is arranged in the same plane, each of the ground terminals is arranged in a plane different from the same plane, and the ground terminals on both sides of each of the signal terminal pairs are mechanically and electrically connected to each other Together. The electrical connector according to claim 1, wherein the grounding terminal includes a grounding mating end that matches with the mating connector, a grounding mounting end installed on a circuit board, and a transition between the grounding mating end and the grounding mounting end Part, the transition part is provided with a connecting piece that connects the ground terminals on both sides of a signal terminal pair together. The electrical connector according to claim 2, wherein the grounding terminal includes a grounding mating end that matches with the mating connector, a grounding mounting end installed on the circuit board, and a transition between the grounding mating end and the grounding mounting end Part, the transition part is provided with a connecting piece that connects the ground terminals on both sides of a signal terminal pair together. The electrical connector according to claim 3, which further includes a grounding plate arranged on one side of the insulating body, the grounding plate and the connecting piece are arranged on the same side of the insulating body, and the connecting piece is located along the butting direction of the connecting piece. The front of the floor. The electrical connector according to claim 4, wherein the lateral distance between the ground plate and the ground terminal is less than 0.2 mm. The electrical connector according to claim 1, wherein the signal terminal is integrally formed in the insulating body, and the ground terminal is installed in the insulating body. The electrical connector according to claim 6, wherein the wide side of each ground terminal is arranged in a plane perpendicular to the wide side of the signal terminal. The electrical connector according to claim 7, wherein the signal terminals are arranged in a serpentine shape in the direction of the wide side of the ground terminal to achieve the same length of the physical structure of the signal terminal pair, thereby achieving the same length of the electrical structure, so that The time delay difference caused by the signal passing the signal terminal pair is less than 0.20 picoseconds. The electrical connector according to claim 6, wherein the insulating body includes an air gap for exposing the signal terminal to the air. The electrical connector according to claim 1, wherein the outer surface of the insulating body is coated with a layer of absorbing material.

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