阅读说明：本技术 端子模组以及背板连接器 (Terminal module and backplane connector ) 是由 柳小刚 郭荣哲 刘琨 于 2021-08-16 设计创作，主要内容包括：一种端子模组包括若干导电端子。所述导电端子包括接触部。所述导电端子包括差分信号端子。所述差分信号端子包括自其接触部延伸的第一延展部、扭转部以及第二延展部。所述第二延展部垂直于所述第一延展部。所述差分信号端子包括第一信号端子以及第二信号端子。所述差分信号端子的两个第一延展部之间绝大部分窄边耦合,少部分宽边耦合。所述差分信号端子的两个第二延展部之间窄边耦合。本发明还揭示了一种具有上述端子模组的背板连接器。相较于现有技术,本发明能够使所述差分信号端子处于紧耦合,使插入损耗趋于稳定。(A terminal module comprises a plurality of conductive terminals. The conductive terminal includes a contact portion. The conductive terminals include differential signal terminals. The differential signal terminal includes a first extension portion, a torsion portion, and a second extension portion extending from a contact portion thereof. The second extension is perpendicular to the first extension. The differential signal terminals include a first signal terminal and a second signal terminal. Most narrow sides of the two first extending parts of the differential signal terminal are coupled, and a small part of wide sides of the two first extending parts of the differential signal terminal are coupled. The two second extending parts of the differential signal terminal are coupled in a narrow edge mode. The invention also discloses a backplane connector with the terminal module. Compared with the prior art, the differential signal terminal can be in tight coupling, so that the insertion loss tends to be stable.)

1. A terminal module (6) comprising:

the conductive terminals (62), the conductive terminals (62) include contact portions (621) and connecting portions (623); the electrically conductive terminals (62) comprise differential signal terminals located between the first ground terminal (G1) and the second ground terminal (G2), a first ground terminal (G1), and a second ground terminal (G2); and

the connecting part (623) of the conductive terminal (62) is fixed to the insulating support (61), the insulating support (61) is provided with a hollow part (610), and the connecting part (623) of the conductive terminal (62) is partially exposed to the hollow part (610);

the method is characterized in that: the differential signal terminal comprises a first extending part (624) extending from the contact part (621) of the differential signal terminal to the connecting part (623) of the differential signal terminal, a torsion part (625) connected with the first extending part (624), and a second extending part (626) connected with the torsion part (625), wherein the contact part (621), the first extending part (624), the torsion part (625), and the second extending part (626) of the differential signal terminal all protrude out of the insulating support (61); the second stretch (626) is perpendicular to the first stretch (624); the differential signal terminal includes a first signal terminal (S1) and a second signal terminal (S2), wherein the first extension portion (624) of the first signal terminal (S1) includes a first stepped surface (6241a) and a first extended surface (6242a) connected to the twisted portion (625) of the first signal terminal (S1), the first extension portion (624) of the second signal terminal (S2) includes a second stepped surface (6241b) and a second extended surface (6242b) connected to the twisted portion (625) of the second signal terminal (S2), the first stepped surface (6241a) of the first signal terminal (S1) is coupled to the second stepped surface (6241b) of the second signal terminal (S2) at a narrow side, the first extended surface (42 a) of the first signal terminal (S1) is coupled to the second extended surface (6242b) of the second signal terminal (S6226) at a narrow side, the second extension (626) of the first signal terminal (S1) is edge-coupled to the second extension (626) of the second signal terminal (S2).

2. The terminal module (6) of claim 1, wherein: the first step face (6241a) of the first signal terminal (S1) is aligned with and lies within the same plane as the second step face (6241b) of the second signal terminal (S2), the first extension face (6242a) lies on one side of the plane, and the second extension face (6242b) lies on the other side of the plane.

3. The terminal module (6) according to claim 2, wherein: the first extension face (6242a) and the second extension face (6242b) are symmetrically arranged along the plane.

4. The terminal module (6) of claim 1, wherein: the first expanded portion (624) of the first signal terminal (S1) includes a first bottom surface (6240a), a first inclined portion (6243a) connecting the first bottom surface (6240a) and the first step surface (6241a), and a first turning portion (6244a) connecting the first step surface (6241a) and the first extended surface (6242a), the first step surface (6241a) being higher than the first bottom surface (6240 a).

5. The terminal module (6) according to claim 4, wherein: the first expanded portion (624) of the second signal terminal (S2) includes a second bottom surface (6240b), a second inclined portion (6243b) connecting the second bottom surface (6240b) and the second stepped surface (6241b), and a second turning portion (6244b) connecting the second stepped surface (6241b) and the second extended surface (6242b), and the second stepped surface (6241b) is higher than the second bottom surface (6240 b).

6. The terminal module (6) according to claim 5, wherein: the first bottom surface (6240a), the first inclined portion (6243a), and the first stepped surface (6241a) of the first signal terminal (S1) are in one-to-one correspondence with the second bottom surface (6240b), the second inclined portion (6243b), and the second stepped surface (6241b) of the second signal terminal (S2), respectively, and are coupled at narrow sides.

7. The terminal module (6) according to claim 6, wherein: the first bottom surface (6240a), the first inclined portion (6243a), and the first step surface (6241a) of the first signal terminal (S1) are respectively identical and respectively aligned with the second bottom surface (6240b), the second inclined portion (6243b), and the second step surface (6241b) of the second signal terminal (S2).

8. The terminal module (6) according to claim 6, wherein: the first extended surface (6242a) of the first signal terminal (S1) is lower than the first step surface (6241a), and the second extended surface (6242b) of the second signal terminal (S2) is higher than the second step surface (6241 b).

9. The terminal module (6) of claim 1, wherein: the twisted portion (625) of the first signal terminal (S1) and the twisted portion (625) of the second signal terminal (S2) have the same twist angle.

10. The terminal module (6) of claim 1, wherein: the terminal module (6) includes an insulator (65) fitted over the contact portions (621) of the first and second signal terminals (S1, S2), and a metal shield surrounding member (66) fitted over the insulator (65).

11. The terminal module (6) of claim 1, wherein: the terminal module (6) comprises a first metal shielding sheet (63) positioned on one side of the insulating support (61) and a second metal shielding sheet (64) positioned on the other side of the insulating support (61), the first metal shielding sheet (63) is provided with a first main body part (631) positioned on one side of the connecting part (623) of the conductive terminal (62), and the second metal shielding sheet (64) is provided with a second main body part (641) positioned on the other opposite side of the connecting part (623) of the conductive terminal (62);

the first body part (631) is provided with a first rib (6331) protruding toward the first ground terminal (G1) and a second rib (6332) protruding toward the second ground terminal (G2);

the second body part (641) is provided with a third rib (6431) protruding toward the first ground terminal (G1) and a fourth rib (6432) protruding toward the second ground terminal (G2);

the first rib (6331) and the third rib (6431) are respectively in contact with opposite side surfaces of the connecting portion (623) of the first ground terminal (G1), and the second rib (6332) and the fourth rib (6432) are respectively in contact with opposite side surfaces of the connecting portion (623) of the second ground terminal (G2);

the first body portion (631), the second body portion (641), the first ground terminal (G1), and the second ground terminal (G2) enclose a shield cavity (67) that receives a connection portion (623) of the differential signal terminal.

12. The terminal module (6) of claim 11, wherein: the connecting portion (623) of first ground terminal (G1) is equipped with and extends into first tab portion (6234) in shielding chamber (67), connecting portion (623) of second ground terminal (G2) is equipped with and extends into second tab portion (6235) in shielding chamber (67), connecting portion (623) of differential signal terminal is located first tab portion (6234) with between second tab portion (6235).

13. A backplane connector (200) comprising:

a housing (5), the housing (5) being provided with an accommodation space (535) for accommodating a docking backplane connector (100); and

a plurality of terminal modules (6), the terminal modules (6) being mounted to the housing (5), the terminal modules (6) being the terminal modules (6) of any one of claims 1 to 12, the contact portions (621) of the conductive terminals (62) protruding into the receiving space (535).

Technical Field

The invention relates to a terminal module and a backplane connector, and belongs to the technical field of connectors.

Background

Existing backplane connectors typically include a housing and a number of terminal modules mounted to the housing. Each terminal module comprises an insulating frame, a plurality of conductive terminals embedded and molded in the insulating frame and a metal shielding sheet arranged on at least one side of the insulating frame. The conductive terminals include groups of differential signal terminals and ground terminals located on opposite sides of each group of differential signal terminals.

Each set of differential signal terminals generally includes a first signal terminal and a second signal terminal, however, how to realize the coupling of the first signal terminal and the second signal terminal is crucial to improve the quality of signal transmission.

Disclosure of Invention

The invention aims to provide a terminal module and a backplane connector, wherein a first signal terminal and a second signal terminal in a differential signal terminal can be well coupled.

In order to achieve the purpose, the invention adopts the following technical scheme: a terminal module, comprising:

the conductive terminals comprise contact parts and connecting parts; the conductive terminal comprises a differential signal terminal, a first ground terminal and a second ground terminal, wherein the differential signal terminal is positioned between the first ground terminal and the second ground terminal; and

the connecting part of the conductive terminal is fixed on the insulating support, the insulating support is provided with a hollow part, and the connecting part of the conductive terminal is partially exposed in the hollow part;

the differential signal terminal comprises a first extension part extending from the contact part of the differential signal terminal to the connecting part of the differential signal terminal, a torsion part connected with the first extension part and a second extension part connected with the torsion part, and the contact part, the first extension part, the torsion part and the second extension part of the differential signal terminal all protrude out of the insulating support; the second extension is perpendicular to the first extension; the differential signal terminal comprises a first signal terminal and a second signal terminal, wherein the first extending portion of the first signal terminal comprises a first step surface and a first extending surface connected with the torsion portion of the first signal terminal, the first extending portion of the second signal terminal comprises a second step surface and a second extending surface connected with the torsion portion of the second signal terminal, the first step surface of the first signal terminal is coupled with the second step surface narrow side of the second signal terminal, the first extending surface of the first signal terminal is coupled with the second extending surface wide side of the second signal terminal, and the second extending portion of the first signal terminal is coupled with the second extending portion narrow side of the second signal terminal.

As a further improved technical solution of the present invention, the first step surface of the first signal terminal and the second step surface of the second signal terminal are aligned and located in the same plane, the first extending surface is located on one side of the plane, and the second extending surface is located on the other side of the plane.

As a further improved aspect of the present invention, the first extension surface and the second extension surface are symmetrically arranged along the plane.

As a further improved aspect of the present invention, the first extending portion of the first signal terminal includes a first bottom surface, a first inclined portion connecting the first bottom surface and the first step surface, and a first turning portion connecting the first step surface and the first extending surface, and the first step surface is higher than the first bottom surface.

As a further improved aspect of the present invention, the first extending portion of the second signal terminal includes a second bottom surface, a second inclined portion connecting the second bottom surface and the second step surface, and a second turning portion connecting the second step surface and the second extending surface, and the second step surface is higher than the second bottom surface.

As a further improved technical solution of the present invention, the first bottom surface, the first inclined portion, and the first step surface of the first signal terminal are respectively in one-to-one correspondence with the second bottom surface, the second inclined portion, and the second step surface of the second signal terminal and are coupled to narrow sides.

As a further improved technical solution of the present invention, the first bottom surface, the first inclined portion, and the first step surface of the first signal terminal are respectively identical to and aligned with the second bottom surface, the second inclined portion, and the second step surface of the second signal terminal.

As a further improved aspect of the present invention, the first extending surface of the first signal terminal is lower than the first step surface, and the second extending surface of the second signal terminal is higher than the second step surface.

As a further improved aspect of the present invention, the twisted portion of the first signal terminal and the twisted portion of the second signal terminal have the same twist angle.

As a further improved technical solution of the present invention, the terminal module includes an insulator sleeved on the contact portion of the first signal terminal and the contact portion of the second signal terminal, and a metal shielding enclosure sleeved on the insulator.

As a further improved technical solution of the present invention, the terminal module includes a first metal shielding plate located at one side of the insulating support and a second metal shielding plate located at the other side of the insulating support, the first metal shielding plate is provided with a first main body portion located at one side of the connecting portion of the conductive terminal, and the second metal shielding plate is provided with a second main body portion located at the other opposite side of the connecting portion of the conductive terminal;

the first main body part is provided with a first convex rib protruding towards the first grounding terminal and a second convex rib protruding towards the second grounding terminal;

the second main body part is provided with a third convex rib protruding towards the first ground terminal and a fourth convex rib protruding towards the second ground terminal;

the first convex rib and the third convex rib are respectively contacted with two opposite side surfaces of the connecting part of the first grounding terminal, and the second convex rib and the fourth convex rib are respectively contacted with two opposite side surfaces of the connecting part of the second grounding terminal;

the first body portion, the second body portion, the first ground terminal, and the second ground terminal enclose a shield cavity that houses a connection portion of the differential signal terminal.

As a further improved solution of the present invention, the connecting portion of the first ground terminal is provided with a first tab portion extending into the shielding cavity, the connecting portion of the second ground terminal is provided with a second tab portion extending into the shielding cavity, and the connecting portion of the differential signal terminal is located between the first tab portion and the second tab portion.

The present invention also discloses a backplane connector, comprising:

the shell is provided with an accommodating space for accommodating the butting backplane connector; and

the terminal modules are arranged on the shell, the terminal modules are the terminal modules, and the contact parts of the conductive terminals protrude into the accommodating space.

Compared with the prior art, the torsion part is arranged, so that the second extending part is perpendicular to the first extending part; by coupling the first step surface of the first signal terminal with the second step surface of the second signal terminal, the first extending surface of the first signal terminal with the second extending surface of the second signal terminal, and the second extending portion of the first signal terminal with the second extending portion of the second signal terminal, respectively, the first signal terminal and the second signal terminal in the differential signal terminal are coupled tightly, so that the insertion loss tends to be stable, and the signal transmission quality of the differential signal terminal is improved.

Drawings

Fig. 1 is a perspective view of one embodiment of the backplane connector assembly of the present invention.

Fig. 2 is a partially exploded perspective view of fig. 1.

Fig. 3 is a perspective view of a backplane connector of the present invention mounted on a first circuit board in one embodiment.

Fig. 4 is a partially exploded perspective view of fig. 3.

Fig. 5 is a partial exploded perspective view of the backplane connector of fig. 4 at another angle.

Fig. 6 is a front view of the backplane connector of fig. 3.

Fig. 7 is a partial exploded perspective view of the backplane connector shown removed from the housing of fig. 5 with the retention tabs separated.

Fig. 8 is a side view of one terminal module of the backplane connector.

Fig. 9 is a partial exploded perspective view of another angle of the backplane connector.

Fig. 10 is a partially enlarged view of circled portion a in fig. 9.

Fig. 11 is a perspective view of a terminal module of the backplane connector.

Fig. 12 is a partially exploded perspective view of fig. 11.

Fig. 13 is a side view of a first metal shield plate of the backplane connector.

Fig. 14 is a side view of a second metal shield plate of the backplane connector.

Fig. 15 is a side view of fig. 11 with the first and second metallic shield sheets removed and with a metallic shield enclosure and an insulator separated.

Fig. 16 is a perspective sectional view taken along line K-K in fig. 2.

Fig. 17 is a partially enlarged view of a picture frame portion B in fig. 16.

Fig. 18 is a partially exploded perspective view of the conductive terminals in a terminal module.

Fig. 19 is a front view of fig. 18.

Fig. 20 is a partially enlarged view of circled portion C in fig. 18.

Fig. 21 is a partially enlarged view of circled portion D in fig. 19.

Fig. 22 is a partial enlarged view of fig. 21 from another angle.

Fig. 23 is an exploded perspective view of the metal shield enclosure and insulator.

Fig. 24 is a partial exploded perspective view of a mating backplane connector and a second circuit board in one embodiment.

Fig. 25 is a further exploded perspective view of the docking housing of fig. 24 removed.

Fig. 26 is an exploded perspective view of one of the docking terminal modules of fig. 25.

Fig. 27 is a side view of the mating conductive terminal and the dielectric support bracket when secured together.

Fig. 28 is a side view of the mating conductive terminal of fig. 27.

Fig. 29 is a partially enlarged view of circled portion E in fig. 28.

Fig. 30 is a cross-sectional view of the mating backplane connector and the backplane connector in a mated position and taken along line F-F of fig. 1.

Fig. 31 is an enlarged partial view of circled portion H of fig. 30 with the mating backplane connector in mated position with the backplane connector.

FIG. 32 is an enlarged partial view of the alternate state of FIG. 31 with the mating backplane connector and the backplane connector in a docked condition.

Detailed Description

Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. If several embodiments exist, the features of these embodiments may be combined with each other without conflict. When the description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The statements made in the following exemplary detailed description do not represent all implementations consistent with the present disclosure; rather, they are merely examples of apparatus, products, and/or methods consistent with certain aspects of the invention, as set forth in the claims below.

The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention. As used in the specification and claims of this invention, the singular form of "a", "an", or "the" is intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the use of terms such as "first," "second," and the like, in the description and in the claims of the present invention do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. Unless otherwise indicated, the terms "front," "back," "up," "down," and the like in the description of the invention are used for convenience of description and are not limited to a particular position or spatial orientation. The word "comprise" or "comprises", and the like, is an open-ended expression meaning that an element that precedes "includes" or "comprising" includes "that the element that follows" includes "or" comprises "and its equivalents, that do not preclude the element that precedes" includes "or" comprising "from also including other elements. If the invention is referred to as "a plurality", it means two or more.

Referring to fig. 1 and 2, the present invention discloses a backplane connector assembly, which includes a backplane connector 200, a mating backplane connector 100 mated with the backplane connector 200, a first circuit board 302 mounted with the backplane connector 200, and a second circuit board 301 mounted with the mating backplane connector 100. In the illustrated embodiment of the invention, the backplane connector 200 is mated with the docking backplane connector 100 in an orthogonal manner, with the second circuit board 301 perpendicular to the first circuit board 302.

Referring to fig. 3, in the illustrated embodiment of the invention, the backplane connector 200 is fixed to the first circuit board 302 by bolts 303. The backplane connector 200 is used to mate with the docking backplane connector 100 to realize high-speed data transmission.

Referring to fig. 4 and 5, the backplane connector 200 includes a housing 5, a plurality of terminal modules 6 mounted on the housing 5, a holding piece 7 held on one side of the terminal modules 6, and a holding block 8 holding the other side of the terminal modules 6.

The housing 5 is made of an insulating material, and includes a body portion 51, a wall portion 52 extending from the body portion 51 toward one end (e.g., forward), and a frame portion 53 extending from the body portion 51 toward the other end (e.g., rearward). The body portion 51 is provided with a plurality of terminal receiving grooves 511 penetrating in a first direction a1-a1 (e.g., a front-rear direction). As shown in fig. 6, in the illustrated embodiment of the invention, the terminal receiving slots 511 are arranged in a plurality of rows along the second direction a2-a2 (e.g., the left-right direction), wherein two adjacent rows of terminal receiving slots 511 are staggered along the third direction A3-A3 (e.g., the up-down direction), that is, the terminal receiving slots 511 at corresponding positions of two adjacent rows of terminal receiving slots 511 are not aligned along the second direction a2-a 2. The wall portion 52 includes a first wall portion 521 and a second wall portion 522 which are disposed opposite to each other. The first wall 521 is provided with a plurality of first slots 5211, and the second wall 522 is provided with a plurality of second slots 5221. The first and second slots 5211 and 5221 aligned with each other and the terminal receiving grooves 511 corresponding thereto are used together to receive the terminal modules 6.

The frame portion 53 includes a first extending wall 531, a second extending wall 532 opposite to the first extending wall 531, a top wall 533 connecting one end of the first extending wall 531 and one end of the second extending wall 532, a bottom wall 534 connecting the other end of the first extending wall 531 and the other end of the second extending wall 532, and a housing space 535 enclosed by the first extending wall 531, the second extending wall 532, the top wall 533, and the bottom wall 534. The receiving space 535 is used for at least partially receiving a docking backplane connector (not shown). Specifically, in the illustrated embodiment of the present invention, the first extension wall 531 and the second extension wall 532 are provided with a plurality of positioning grooves 530 at intervals, so as to improve the mating accuracy when mating with a mating backplane connector.

Referring to fig. 7 to 12, the terminal module 6 includes an insulating support 61, a plurality of conductive terminals 62 insert-molded on the insulating support 61, a first metal shielding plate 63 fixed on one side of the insulating support 61, and a second metal shielding plate 64 fixed on the other opposite side of the insulating support 61.

Referring to fig. 12 and 15, the insulating holder 61 is substantially shaped like a frame, and includes a rear wall 611, a front wall 612 opposite to the rear wall 611, a top wall 613 connecting one end of the rear wall 611 and one end of the front wall 612, a bottom wall 614 connecting the other end of the rear wall 611 and the other end of the front wall 612, and a plurality of connecting walls 615. The connecting wall 615 can provide structural strength to the frame. The rear wall 611 is provided with a first protruding bump 6111, and the top wall 613 is provided with a second protruding bump 6131. As shown in fig. 7, the holding sheet 7 is substantially L-shaped, and is provided with a first locking groove 71 and a second locking groove 72 for respectively locking the first projection 6111 and the second projection 6131. In this way, the terminal modules 6 can be integrally formed by providing the holding pieces 7. In the illustrated embodiment of the present invention, the insulating support 61 is provided with a hollow 610, and the connecting wall 615 includes a first connecting wall 6151 connecting the top wall 613 and the bottom wall 614 and a second connecting wall 6152 connecting the rear wall 611 and the bottom wall 614. The first connecting wall 6151 and the second connecting wall 6152 are exposed in the hollow portion 610. The first connecting wall 6151 and the second connecting wall 6152 are arranged obliquely. One ends of the first connecting wall 6151 and the second connecting wall 6152 are close to each other, and the other ends are scattered to form a radiation shape. The connecting wall 615 is further provided with a reinforcing wall 6153 connecting the top wall 613 and the bottom wall 614 and being parallel to the front wall 612.

Referring to fig. 12 and 15, the front wall 612 is provided with a plurality of protrusions 6121 arranged at intervals and a groove 6122 located between two adjacent protrusions 6121. The bump 6121 has an opening 6123 to partially expose the conductive terminal 62, so as to adjust the impedance.

The insulating bracket 61 is further provided with a plurality of protruding columns 616 for fixing and positioning the first metal shielding sheet 63 and the second metal shielding sheet 64. In the illustrated embodiment of the present invention, the post 616 is substantially cylindrical. In the illustrated embodiment of the present invention, the protruding pillars 616 are disposed on the bottom wall 614, the first connecting wall 6151 and the second connecting wall 6152. The first metal shielding plate 63 and the second metal shielding plate 64 are respectively located at two sides of the insulating support 61. Referring to fig. 12 to 15, the protruding pillar 616 includes a first protruding pillar 6161 and a second protruding pillar 6162, wherein the first protruding pillar 6161 and the second protruding pillar 6162 are respectively located on two opposite sides of the insulating bracket 61, so as to be fixed to the first metal shielding plate 63 and the second metal shielding plate 64.

In view of structure, referring to fig. 16 to fig. 22, in the illustrated embodiment of the present invention, each set of conductive terminals 62 includes a contact portion 621, a tail portion 622, and a connection portion 623 located between the contact portion 621 and the tail portion 622. The holding block 8 is provided with through holes for the tail portions 622 to pass through, so as to facilitate the positioning of each tail portion 622, thereby facilitating the mounting of the tail portions 622 on the first circuit board 302. A portion of the contact portion 621 is used to electrically connect to the docking backplane connector 100. In the illustrated embodiment of the present invention, the connection portion 623 has a zigzag shape. Specifically, the connection portion 623 includes a first portion 623a parallel to the contact portion 621, a second portion 623b parallel to the tail portion 622, and a third portion 623c connecting the first portion 623a and the second portion 623 b. Referring to fig. 15, the first portion 623a extends vertically, the second portion 623b extends horizontally, and the third portion 623c extends obliquely.

Functionally, each set of conductive terminals 62 includes a plurality of first ground terminals G1, a plurality of second ground terminals G2, and a plurality of signal terminals S. The plurality of signal terminals S includes a first signal terminal S1 and a second signal terminal S2. In the illustrated embodiment of the present invention, the adjacent first signal terminal S1 and second signal terminal S2 form a Pair of Differential signal terminals (Differential Pair), and each Pair of Differential signal terminals is located between a first ground terminal G1 and a second ground terminal G2, i.e., each set of conductive terminals 62 is arranged in an arrangement of G1-S1-S2-G2, which is beneficial to improve the quality of signal transmission. The differential signal terminal adopts a mode of combining narrow-side coupling and wide-side coupling. The widths of the first ground terminal G1 and the second ground terminal G2 are respectively greater than the widths of the first signal terminal S1 and the second signal terminal S2 therebetween, which is beneficial to increase the shielding area and improve the shielding effect.

In the illustrated embodiment of the present invention, the connection portion 623 of the conductive terminal 62 is Insert molded (Insert Molding) to the insulating holder 61. The connecting portion 623 of the differential signal terminal, the connecting portion 623 of the first ground terminal G1 and the connecting portion 623 of the second ground terminal G2 are exposed in the same hollow portion 610. The connecting portion 623 of the signal terminal S is provided with a narrowing portion 6230 (see fig. 12) embedded in the insulating support 61 to adjust the impedance of the signal terminal S and achieve impedance matching.

Referring to fig. 18 to 22, in the illustrated embodiment of the present invention, the differential signal terminal further includes a first extending portion 624 extending from the contact portion 621 of the differential signal terminal to the connection portion 623 of the differential signal terminal, a twisted portion 625 connected to the first extending portion 624, and a second extending portion 626 connected to the twisted portion 625. The first extension 624, the torsion portion 625, and the second extension 626 extend in the first direction a1-a1 (e.g., front-to-back direction). The first extension 624 includes a wide side and a narrow side, and the second extension 626 includes a wide side and a narrow side. The first extending portion 624 of the first signal terminal S1 and the first extending portion 624 of the second signal terminal S2 are arranged side by side and spaced apart along the second direction a2-a2 (e.g., the left-right direction), and the narrow side of the first extending portion 624 of the first signal terminal S1 is coupled with the narrow side of the first extending portion 624 of the second signal terminal S2. The second extension 626 of the first signal terminal S1 and the second extension 626 of the second signal terminal S2 are spaced apart from each other along the third direction A3-A3 (e.g., up and down direction), and the narrow side of the second extension 626 of the first signal terminal S1 is coupled to the narrow side of the second extension 626 of the second signal terminal S2. The torsion portion 625 is more contracted than the first and second extending portions 624 and 626 at both ends thereof, thereby being beneficial to reducing resistance when the torsion portion 625 is formed by torsion and reducing manufacturing difficulty. In addition, this arrangement is also advantageous to make the torsion area where the torsion portion 625 is located as short as possible, thereby improving the coupling effect of the first signal terminal S1 and the second signal terminal S2. By providing the torsion portion 625, the second extension portion 626 is substantially perpendicular to the first extension portion 624.

Specifically, the first expanded portion 624 of the first signal terminal S1 includes a first bottom surface 6240a, a first step surface 6241a higher than the first bottom surface 6240a, a first extended surface 6242a lower than the first step surface 6241a, a first inclined portion 6243a connecting the first bottom surface 6240a and the first step surface 6241a, and a first turned portion 6244a connecting the first step surface 6241a and the first extended surface 6242 a.

The first expanded portion 624 of the second signal terminal S2 includes a second bottom surface 6240b, a second step surface 6241b higher than the second bottom surface 6240b, a second extended surface 6242b higher than the second step surface 6241b, a second inclined portion 6243b connecting the second bottom surface 6240b and the second step surface 6241b, and a second turn 6244b connecting the second step surface 6241b and the second extended surface 6242 b.

In the illustrated embodiment of the present invention, the contact portion 621, the first bottom surface 6240a, the first inclined portion 6243a, and the first step surface 6241a of the first signal terminal S1 are in one-to-one correspondence with the contact portion 621, the second bottom surface 6240b, the second inclined portion 6243b, and the second step surface 6241b of the second signal terminal S2, respectively, have the same structure, and are aligned along the second direction a2-a 2. A plane P1 on which the first step surface 6241a and the second step surface 6241b are commonly located is located between a plane on which the first extending surface 6242a is located and a plane on which the second extending surface 6242b is located. In other words, the first extended surface 6242a is higher than the first and second stepped surfaces 6241a and 6241b, and the second extended surface 6242b is lower than the first and second stepped surfaces 6241a and 6241 b. Preferably, the first turn 6244a, the first extending surface 6242a, the torsion portion 625 and the second extending portion 626 of the first signal terminal S1 are arranged symmetrically with respect to the second turn 6244b, the second extending surface 6242b, the torsion portion 625 and the second extending portion 626 of the second signal terminal S2 along a plane P1 on which the first step surface 6241a and the second step surface 6241b are located. With this arrangement, the first signal terminal S1 and the second signal terminal S2 are closer in structure and length, thereby improving impedance matching. The first extended face 6242a and the second extended face 6242b each include a broad side and a narrow side, wherein the broad side of the first extended face 6242a is coupled with the broad side of the second extended face 6242 b. In the illustrated embodiment of the present invention, the twisted portion 625 of the first signal terminal S1 and the twisted portion 625 of the second signal terminal S2 have the same twisting angle, so that the first signal terminal S1 and the second signal terminal S2 can be twisted at the same time by using a jig, thereby improving the production efficiency.

Compared with the prior art, the first extension 624 and the second extension 626 of the first signal terminal S1 and the second signal terminal S2 of the present invention are perpendicular to each other; the first bottom surface 6240a, the first inclined part 6243a and the first stepped surface 6241a of the first signal terminal S1 respectively correspond to the second bottom surface 6240b, the second inclined part 6243b and the second stepped surface 6241b of the second signal terminal S2 one by one, have the same structure, and are coupled by narrow sides; the second extension 626 of the first signal terminal S1 corresponds to the second extension 626 of the second signal terminal S2, has the same structure, and is coupled by a narrow side; a first extended surface 6242a of the first signal terminal S1 close to the twisted portion 625 is coupled to a second extended surface 6242b of the second signal terminal S2 close to the twisted portion 625 in a broad surface coupling manner; this arrangement is advantageous for tightly coupling the first signal terminal S1 and the second signal terminal S2 of the differential signal terminal, so that the insertion loss tends to be stable, and the signal transmission quality of the differential signal terminal is improved.

Referring to fig. 20, in the illustrated embodiment of the present invention, each contact portion 621 of the signal terminal S has a two-half structure. In the same pair of differential signal terminals, the contact 621 of the first signal terminal S1 and the contact 621 of the second signal terminal S2 are identical, so as to facilitate manufacturing and reduce cost. Only the contact portion 621 of the first signal terminal S1 will be described below as an example.

The contact portion 621 of the first signal terminal S1 includes a first contact arm 6211, a second contact arm 6212 opposite to the first contact arm 6211, and a first clamping space 6210 between the first contact arm 6211 and the second contact arm 6212. The first contact arm 6211 and the second contact arm 6212 are bent from two opposite edges of the first signal terminal S1 to the same side (for example, upward). The first contact arm 6211 and the second contact arm 6212 are symmetrically arranged at both sides of the first clamping space 6210.

When the signal terminals of the mating backplane connector 100 having a needle shape are inserted into the first clamping space 6210, the first contact arm 6211 and the second contact arm 6212 can be elastically deformed to improve contact reliability.

The contact portion 621 between the first ground terminal G1 and the second ground terminal G2 has a substantially flat plate shape. The contact portion 621 of the first ground terminal G1, the contact portion 621 of the second ground terminal G2, and the connecting portion 623 of the conductive terminal 62 are coplanar. The contact portion 621 of the first ground terminal G1 and the contact portion 621 of the second ground terminal G2 extend into the corresponding grooves 6122, so as to contact with the first metallic shielding plate 63 and the second metallic shielding plate 64. The contact portion 621 of the signal terminal S extends beyond the bump 6121.

Referring to fig. 16 and 17, in the illustrated embodiment of the invention, the contact portion 621 and the connection portion 623 of the first ground terminal G1 are both provided with a first wide surface 621a and a first narrow surface 621b perpendicular to the first wide surface 621 a. The contact portion 621 and the connection portion 623 of the second ground terminal G2 are both provided with a second wide surface 621c and a second narrow surface 621d perpendicular to the second wide surface 621 c. The connecting portion 623 of each pair of differential signal terminals is located between the first narrow face 621b of the first ground terminal G1 and the second narrow face 621d of the second ground terminal G2 on both sides thereof.

As shown in fig. 18, 19 and 23, each set of terminal modules 6 further includes an insulator 65 sleeved on the contact portion 621 of the signal terminal S and a metal shielding surrounding member 66 sleeved on the insulator 65. Referring to fig. 28, each of the insulators 65 has a mating surface 652 at the end and a terminal receiving hole penetrating the mating surface 652. In the illustrated embodiment of the present invention, the insulator 65 has a substantially rectangular parallelepiped shape, and includes a first side 653, a second side 654, a third side 655, and a fourth side 656, which are connected in this order. The second side surface 654 and the fourth side surface 656 are respectively provided with a limit groove 657 penetrating the matching surface 652 and a convex rib 658 positioned behind the limit groove 657.

The metal shield enclosure 66 is substantially rectangular parallelepiped in shape. In one embodiment of the present invention, the insulator 65 is fixed in the metal shield enclosure 66 by welding. Of course, in other embodiments, the insulator 65 may be secured within the metal shield enclosure 66 by other means.

Referring to fig. 10 and 23, the metal shielding enclosure 66 includes a first sidewall 661, a second sidewall 662, a third sidewall 663 and a fourth sidewall 664 connected in sequence, wherein the first sidewall 661 is opposite to the third sidewall 663, and the second sidewall 662 is opposite to the fourth sidewall 664. The first, second, third and fourth sidewalls 661, 662, 663 and 664 correspond to the first, second, third and fourth sides 653, 654, 655 and 656 of the insulator 65, respectively. The areas of the first and third sidewalls 661 and 663 are greater than the areas of the second and fourth sidewalls 662 and 664. The ends of the first, second, third and fourth sidewalls 661, 662, 663 and 664 are provided with an inward bent deflection portion 665. By providing the deflector 665, a constriction can be formed at the end of the metal shield surround 66 on the one hand, enabling the outer surface 6651 of the deflector 665 to guide the mounting of the terminal module 6 to the housing 5, and even the insertion of the metal shield surround 66 into a mating backplane connector. In addition, the second and fourth sidewalls 662, 664 are provided with inwardly stamped tabs 667. When the metal shield enclosure 66 is assembled with the insulator 65, the tab 667 extends into the limit slot 657 to achieve a limit; when the metal shielding enclosure 66 and the insulator 65 are assembled in place, the ribs 658 of the second and fourth sides 654 and 656 respectively abut the second and fourth sidewalls 662 and 664 to improve the holding force; in addition, a tab 667 abuts against the rear end of the stopper groove 657 to restrict the relative position between the metal shield enclosure 66 and the insulator 65.

In the illustrated embodiment of the present invention, the metal shield enclosure 66 further includes a first extending tab 6611 extending from the first side wall 661, and a first slot 6612 located at both sides of the first extending tab 6611. The metal shielding enclosure 66 further includes a second extension piece 6631 extending and protruding from the third side wall 663 and second slots 6632 at both sides of the second extension piece 6631. The first extension piece 6611 vertically contacts the contact portion 621 of the first ground terminal G1 to improve the shielding effect; the second extension piece 6631 vertically contacts the contact portion 621 of the second ground terminal G2 to improve a shielding effect. In the illustrated embodiment of the present invention, the first extending tab 6611 and the second extending tab 6631 are deflected outward and then extended, so that the distance between the first extending tab 6611 and the second extending tab 6631 on the same metallic shield enclosure 66 is greater than the distance between the first side wall 661 and the third side wall 663. Referring to fig. 19, for a group of conductive terminals 62 arranged in a pattern G1-S1-S2-G2, the contact portion 621 of the first ground terminal G1 is provided with a first notch 6216 close to the differential signal terminal, and the first notch 6216 is configured to receive the first extending piece 6611; the contact portion 621 of the second ground terminal G2 is provided with a second notch 6217 adjacent to the differential signal terminal, and the second notch 6217 is configured to receive the second extending piece 6631. In the illustrated embodiment of the present invention, taking an example that two adjacent pairs of differential signal terminals share one second ground terminal G2, two sides of the second ground terminal G2 are respectively provided with a second notch 6217 facing different differential signal terminals, and the notch 6217 is configured to cooperate with two adjacent metal shielding enclosures 66.

In the illustrated embodiment of the present invention, the first metal shielding plate 63 and the second metal shielding plate 64 are symmetrically disposed on both sides of the insulating support 61. Referring to fig. 12 and 13, the first metal shielding plate 63 includes a first main body 631, a first extending portion 632 extending from the first main body 631, and a first elastic arm 634 and a second elastic arm 635 respectively located at two sides of the first extending portion 632. The first elastic arm 634 and the second elastic arm 635 extend beyond the first main body 631 to contact the first ground terminal G1 and the second ground terminal G2, respectively. The first body portion 631 is positioned at one side of the connection portion 623 of the conductive terminal 62. In the illustrated embodiment of the present invention, the first extension portion 632 is located in a different plane from the first main body portion 631, wherein the first extension portion 632 is farther away from the second metallic shield piece 64 than the first main body portion 631. The first main body 631 is provided with a plurality of first mounting holes 6311 matching with the plurality of first protruding columns 6161, and the first protruding columns 6161 are fixed in the first mounting holes 6311 by welding. The first body 631 is provided with a plurality of ribs 633, and the ribs 633 include first ribs 6331 protruding toward the first ground terminal G1 and second ribs 6332 protruding toward the second ground terminal G2. The first rib 6331 is disposed along an extending direction of the connecting portion 623 of the first ground terminal G1. The second rib 6332 is disposed along the extending direction of the connecting portion 623 of the second ground terminal G2. In the illustrated embodiment of the present invention, the first and second ribs 6331 and 6332 are formed by pressing the first body portion 631. The first protruding rib 6331 and the second protruding rib 6332 protrude toward the second metal shielding plate 64. The first rib 6331 and the second rib 6332 are discontinuously disposed along the extending direction of the connecting portion 623 of the first ground terminal G1 and the second ground terminal G2 to realize multi-point contact, so as to improve the contact reliability of the first metal shielding plate 63 with the first ground terminal G1 and the second ground terminal G2. In the illustrated embodiment of the present invention, the wall thickness of the first rib 6331, the wall thickness of the second rib 6332, and the wall thickness of the portion of the first body portion 631 located between the first rib 6331 and the second rib 6332 are the same. Specifically, each of the first and second ribs 6331 and 6332 includes a first rib portion 633a parallel to the contact portion 621, a second rib portion 633b parallel to the tail portion 622, and a third rib portion 633c connecting the first and second rib portions 633a and 633 b. Referring to fig. 13, the first rib portion 633a extends vertically, the second rib portion 633b extends horizontally, and the third rib portion 633c extends obliquely. The first, second, and third ribs 633a, 633b, and 633c are in contact with the first, second, and third portions 623a, 623b, and 623c of the corresponding first and second ground terminals G1 and G2, respectively.

In addition, the first main body portion 631 is further provided with a plurality of first protruding pieces 6312 extending further downward from the bottom edge thereof and a connecting piece 6313 located between two adjacent first protruding pieces 6312. By providing the first protruding pieces 6312, the shielding length can be extended, and the shielding effect on the signal terminals S is improved. In the illustrated embodiment of the present invention, the connecting tab 6313 is stamped from the first body 631, and the connecting tab 6313 crosses the slot 6231 to connect the first end 6232 and the second end 6233 of the same first ground terminal G1, so as to improve the shielding effect; meanwhile, the connecting piece 6313 may also connect the first end 6232 and one side of the second end 6233 of the same second ground terminal G2, so as to improve the shielding effect.

In the illustrated embodiment of the present invention, the first extension portion 632 is provided in a plurality and spaced apart from each other. The first extension 632 is inserted into the first slot 6612 and the second slot 6632 of the metal shielding enclosure 66 to make contact, thereby improving shielding effect.

Similarly, referring to fig. 12 and 14, the second metal shielding plate 64 includes a second main body 641, a second extending portion 642 extending from the second main body 641, and a third elastic arm 644 and a fourth elastic arm 645 respectively located at two sides of the second extending portion 642. The third and fourth elastic arms 644 and 645 extend beyond the second body 641 to contact the first and second ground terminals G1 and G2, respectively. The second body portion 641 is located on the other opposite side of the connecting portion 623 of the conductive terminal 62. In the illustrated embodiment of the present invention, the second extension portion 642 is located in a different plane from the second main body portion 641, wherein the second extension portion 642 is further away from the first metal shielding sheet 63 than the second main body portion 641. The second body 641 is provided with a plurality of second mounting holes 6411 matching with the plurality of second studs 6162, and the second studs 6162 are fixed and positioned in the second mounting holes 6411 by welding. The second body 641 is provided with a plurality of ribs 643, and the ribs 643 include a third rib 6431 protruding toward the first ground terminal G1 and a fourth rib 6432 protruding toward the second ground terminal G2. The third rib 6431 is provided along the extending direction of the connecting portion 623 of the first ground terminal G1. The fourth rib 6432 is provided along the extending direction of the connecting portion 623 of the second ground terminal G2. In the illustrated embodiment of the present invention, the third rib 6431 and the fourth rib 6432 are formed by pressing the second body portion 641. The third rib 6431 and the fourth rib 6432 protrude toward the first metal shielding plate 63. The third rib 6431 and the fourth rib 6432 are discontinuously disposed along the extending direction of the connecting portion 623 of the first ground terminal G1 and the second ground terminal G2 to realize multi-point contact, so as to improve the contact reliability of the second metal shielding plate 64 with the first ground terminal G1 and the second ground terminal G2. In the illustrated embodiment of the present invention, the wall thickness of the third rib 6431, the wall thickness of the fourth rib 6432, and the wall thickness of the portion of the second body portion 641 located between the third rib 6431 and the fourth rib 6432 are the same. Specifically, each of the third rib 6431 and the fourth rib 6432 includes a fourth rib 643a parallel to the contact portion 621, a fifth rib 643b parallel to the tail portion 622, and a sixth rib 643c connecting the fourth rib 643a and the fifth rib 643 b. Referring to fig. 14, the fourth rib 643a extends vertically, the fifth rib 643b extends horizontally, and the sixth rib 643c extends obliquely. The fourth rib 643a, the fifth rib 643b, and the sixth rib 643c are in contact with the first portion 623a, the second portion 623b, and the third portion 623c of the corresponding first ground terminal G1 and second ground terminal G2, respectively.

In one embodiment of the present invention, the ribs 633 and 643 are welded to the surfaces thereof, so that the ribs 633 and 643 are welded to the first ground terminal G1 and the second ground terminal G2. For example, welding is performed on the surfaces of the first, second, third and fourth ribs 6331, 6332, 6431 and 6432 to weld the first, second, third and fourth ribs 6331, 6332, 6431 and 6432 to the first and second ground terminals G1 and G2, wherein the welding is at least one of spot welding, laser welding and ultrasonic welding.

In addition, the second body portion 641 is further provided with a plurality of fourth protruding pieces 6412 extending downward from the bottom edge thereof and a connecting piece 6413 located between two adjacent fourth protruding pieces 6412. By providing the fourth projecting piece 6412, the shielding length can be extended, and the shielding effect on the signal terminal S can be improved. In the illustrated embodiment of the present invention, the connecting piece 6413 is punched from the second body 641, and the connecting piece 6413 crosses the slot 6231 to connect the first end 6232 and the opposite side of the second end 6233 of the same first ground terminal G1, so as to improve the shielding effect; meanwhile, the connecting piece 6413 may also connect the first end 6232 and the opposite side of the second end 6233 of the same second ground terminal G2, so as to improve the shielding effect.

In the illustrated embodiment of the present invention, the second extending portions 642 are provided in a plurality and spaced apart from each other. The second extension part 642 is inserted into the first slot 6612 and the second slot 6632 of the metal shielding enclosure 66 to achieve contact, improving shielding effect.

Referring to fig. 17, over the length of the connecting portion 623 of the conductive terminal 62, the first protruding rib 6331 of the first metallic shielding plate 63 and the third protruding rib 6431 of the second metallic shielding plate 64 respectively contact with two opposite side surfaces of the connecting portion 623 of the first ground terminal G1, so as to form a surrounding shielding cavity 67 at the periphery of the connecting portion 623 of each pair of differential signal terminals. In the illustrated embodiment of the present invention, the first rib 6331 and the third rib 6431 are respectively in contact with the first wide surface 621a of the connection portion 623 of the first ground terminal G1, and the second rib 6332 and the fourth rib 6432 are respectively in contact with the second wide surface 621c of the connection portion 623 of the second ground terminal G2. In the illustrated embodiment of the present invention, the shielding cavity 67 is formed by the first body portion 631, the second body portion 641, the first ground terminal G1 and the second ground terminal G2. The connecting portion 623 of the first ground terminal G1 is provided with a first tab portion 6234 extending into the shielding cavity 67, the connecting portion 623 of the second ground terminal G2 is provided with a second tab portion 6235 extending into the shielding cavity 67, and the connecting portion 623 of the differential signal terminal is located between the first tab portion 6234 and the second tab portion 6235. The shielding cavities 67 are plural and are continuously arranged along the arrangement direction of each group of the conductive terminals 62, wherein two adjacent shielding cavities 67 share one first ground terminal G1 or one second ground terminal G2. Taking the common first ground terminal G1 as an example, a portion of the common first ground terminal G1 protrudes into one of the shielding cavities 67, and another portion of the common first ground terminal G1 protrudes into the other shielding cavity 67.

The first and second extension portions 632 and 642 are each inserted into the first and second slots 6612 and 6632 of the metallic shield enclosure 66 at a position near the contact portion 621 of the conductive terminal 62; the first extension piece 6611 and the second extension piece 6631 of the metal shield enclosure 66 are inserted into the first notch 6216 of the first ground terminal G1 and the second notch 6217 of the second ground terminal G2, respectively; meanwhile, the first elastic arm 634 of the first metallic shielding plate 63 and the third elastic arm 644 of the second metallic shielding plate 64 are clamped on both sides of the contact portion 621 of the first ground terminal G1; the second resilient arm 635 of the first metallic shielding plate 63 and the fourth resilient arm 645 of the second metallic shielding plate 64 are clamped at both sides of the contact portion 621 of the second ground terminal G2. Specifically, the first elastic arm 634 and the third elastic arm 644 clamp the first wide surface 621a of the first ground terminal G1; the second resilient arm 635 and the fourth resilient arm 645 sandwich the second wide surface 621c of the second ground terminal G2. With this arrangement, the first metal shielding plate 63, the second metal shielding plate 64, the metal shielding surrounding member 66, the first ground terminal G1 and the second ground terminal G2 are all connected in series, so that the shielding area is increased, and the shielding effect is improved.

In the illustrated embodiment of the present invention, there are a plurality of terminal modules 6 of the backplane connector 200, and the terminal arrangements of two adjacent terminal modules 6 are staggered. Accordingly, the shielding cavities 67 of two adjacent terminal modules 6 are also staggered from each other. When the terminal module 6 is mounted to the housing 5, the metal shield enclosure 66 of the terminal module 6 passes through the corresponding terminal receiving groove 511 to extend into the receiving space 535.

Referring to fig. 24 to 29, the docking backplane connector 100 includes a docking housing 1, a plurality of docking terminal modules 2 mounted on the docking housing 1, a holding piece 3 held on the plurality of docking terminal modules 2, and a holding block 4 held at bottom ends of the plurality of docking terminal modules 2.

Referring to fig. 24, the docking housing 1 is made of an insulating material and includes a main body 11, a first wall 12 extending rearward from one side of the main body 11, and a second wall 13 extending rearward from the other opposite side of the main body 11. The body 11 has a mating surface 111 and a plurality of terminal receiving grooves 112 penetrating the mating surface 111. In the illustrated embodiment of the present invention, the terminal receiving grooves 112 are arranged in a plurality of rows in the vertical direction, wherein the terminal receiving grooves 112 in two adjacent rows are staggered in the horizontal direction, i.e., the terminal receiving grooves 112 at corresponding positions in the terminal receiving grooves 112 in two adjacent rows are not aligned in the vertical direction. The first wall portion 12 is provided with a plurality of first locking grooves 122. The second wall portion 13 is provided with a plurality of second locking grooves 132. The first locking groove 122 and the second locking groove 132 respectively penetrate through the first wall portion 12 and the second wall portion 13 to lock the butt terminal module 2, so as to prevent the butt terminal module 2 from being separated from the butt housing 1. In addition, the docking housing 1 is further provided with a plurality of positioning protrusions 14 respectively extending forward from the first wall portion 12 and the second wall portion 13 and protruding out of the docking surface 111. The positioning protrusion 14 is provided with a guiding inclined surface 141 at the end thereof, which is beneficial to guiding the back board connector 200 to be plugged with the butt-joint back board connector 100.

Referring to fig. 25 to 27, the butt terminal module 2 includes an insulating support frame 21, a plurality of butt conductive terminals 22 fixed on the insulating support frame 21, a first metal shielding plate 23 fixed on one side of the insulating support frame 21, and a second metal shielding plate 24 fixed on the other opposite side of the insulating support frame 21.

The insulating support frame 21 is substantially shaped like a frame, and includes a first rear wall 211, a first front wall 212 opposite to the first rear wall 211, a first top wall 213 connecting one end of the first rear wall 211 and one end of the first front wall 212, a first bottom wall 214 connecting the other end of the first rear wall 211 and the other end of the first front wall 212, and a plurality of connecting walls 215. The connecting wall 215 can reinforce the structural strength of the frame. The first rear wall 211 is provided with a first protrusion 2111 and a second protrusion 2112 protruding rearward and spaced apart from each other. The first protrusion 2111 is aligned with the second protrusion 2112. The holding piece 3 includes a first engaging groove 31 and a second engaging groove 32 that are respectively engaged with the first protrusion 2111 and the second protrusion 2112. In the illustrated embodiment of the present invention, the insulating support 21 is provided with a hollow portion 210, and the connecting wall 215 includes a first connecting wall 2151 connecting the first top wall 213 and the first bottom wall 214 and a second connecting wall 2152 connecting the first back wall 211 and the first bottom wall 214. The first connecting wall 2151 and the second connecting wall 2152 are exposed in the hollow 210. The first top wall 213 is provided with a first locking protrusion 2131 for being inserted into the first locking groove 122, and the first bottom wall 214 is provided with a second locking protrusion 2141 for being inserted into the second locking groove 132.

The insulating support frame 21 further has a plurality of posts 216 for fixing the first metal shielding plate 23 and the second metal shielding plate 24. In the illustrated embodiment of the present invention, the protruding pillar 216 is disposed on the first bottom wall 214, the first connecting wall 2151, the second connecting wall 2152, and the first front wall 212. The first metal shielding plate 23 and the second metal shielding plate 24 are respectively located at two sides of the insulating support frame 21.

Referring to fig. 26 to 28, each pair of mating conductive terminals 22 structurally includes a mating portion 221, a terminal portion 222, and a middle portion 223 between the mating portion 221 and the terminal portion 222. Part of the mating portion 221 is used for electrically connecting with the backplane connector 200, and the terminal portion 222 is used for being mounted on the second circuit board 301. In the illustrated embodiment of the invention, the abutment portion 221 is generally perpendicular to the end portion 222 and the intermediate portion 223 is curved.

Functionally, each pair of mating conductive terminals 22 includes a plurality of first mating ground terminals G1 ', a plurality of second mating ground terminals G2 ', and a plurality of mating signal terminals S '. The plurality of mating signal terminals S ' includes a first mating signal terminal S1 ' and a second mating signal terminal S2 '. In the illustrated embodiment of the present invention, the first and second adjacent mating signal terminals S1 'and S2' form a Pair of mating Differential signal terminals (Differential Pair), and each Pair of mating Differential signal terminals is located between a first mating ground terminal G1 'and a second mating ground terminal G2', i.e., each Pair of mating conductive terminals 22 is arranged in an arrangement of G1 '-S1' -S2 '-G2', which is beneficial to improve the quality of signal transmission. The butt-joint differential signal terminals are in narrow-side coupling or wide-side coupling. The width of the first butt ground terminal G1 ' and the width of the second butt ground terminal G2 ' are greater than the width of the butt signal terminal S ' therebetween, so that the shielding area is increased and the shielding effect is improved.

In the illustrated embodiment of the present invention, the middle portion 223 of the mating conductive terminal 22 is insert-molded into the insulating support 21. The middle portion 223 of the mating signal terminal S 'is provided with a narrowed portion 2230 embedded in the insulating support frame 21 to adjust the impedance of the mating signal terminal S' for impedance matching. In the illustrated embodiment of the present invention, the mating portion 221 of the mating signal terminal S ' is substantially needle-shaped, and the mating portions 221 of the first and second mating ground terminals G1 ' and G2 ' are substantially rectangular. The mating portions 221 of the mating signal terminals S' and the intermediate portions 223 of the mating conductive terminals 22 are all coplanar, i.e., located in a first plane (e.g., a horizontal plane). It is noted that the term "coplanar" as used in the present invention is intended to indicate that the elements involved are substantially flush with each other, including where the coplanarity is not complete due to manufacturing tolerances. However, in the illustrated embodiment of the present invention, the first counterpart ground terminal G1 'is provided with a first torsion part 2241 connecting the counterpart 221 thereof and the middle part 223 thereof, so that the counterpart 221 of the first counterpart ground terminal G1' is located in a second plane (e.g., a vertical plane) perpendicular to the first plane. The second counterpart ground terminal G2 'is provided with a second torsion portion 2242 connecting the counterpart portion 221 thereof and the middle portion 223 thereof, so that the counterpart portion 221 of the second counterpart ground terminal G2' is also located in a second plane (e.g., a vertical plane) perpendicular to the first plane. The butting portion 221 of the first butt ground terminal G1 'is opposite to the wide surface of the butting portion 221 of the second butt ground terminal G2', and the butting portion 221 of the first butt ground terminal G1 'and the butting portion 221 of the second butt ground terminal G2' are parallel to each other. The middle portion 223 of the first butt ground terminal G1 'is opposite to the narrow surface of the middle portion 223 of the second butt ground terminal G2'.

Referring to fig. 26 to 29, the first butting signal terminal S1 ' further includes a first bridging portion 225a connecting the butting portion 221 of the first butting signal terminal S1 ' and the middle portion 223 of the first butting signal terminal S1 '. The first bridging portion 225a includes a first notch 225a1 that is recessed away from the first butt ground terminal G1' adjacent thereto. In other words, the first notch 225a1 of the first docking signal terminal S1 'is recessed toward the second docking signal terminal S2'. In one embodiment of the present invention, the first bridge portion 225a is arc-shaped, and the first notch 225a1 is an arc-shaped notch formed by bending the first bridge portion 225a itself. Of course, in other embodiments, the first notch 225a1 may also be a blanking slot formed after the first bridge 225a is blanked.

Similarly, the second mating signal terminal S2 ' further includes a second bridge portion 225b connecting the mating portion 221 of the second mating signal terminal S2 ' with the middle portion 223 of the second mating signal terminal S2 '. The second bridging portion 225b includes a second notch 225b1 that is recessed away from the second butt ground terminal G2' adjacent thereto. In other words, the second notch 225b1 of the second mating signal terminal S2 'is recessed toward the first mating signal terminal S1'. In one embodiment of the present invention, the second bridge 225b is arc-shaped, and the second notch 225b1 is an arc-shaped notch formed by bending the second bridge 225b itself. Of course, in other embodiments, the second notch 225b1 may also be a blanking slot formed after the second bridge 225b is blanked.

In the illustrated embodiment of the present invention, the first bridge 225a extends from one end of the abutting portion 221 of the first abutting signal terminal S1 'in the direction of the second bridge 225b, and the second bridge 225b extends from one end of the abutting portion 221 of the second abutting signal terminal S2' in the direction of the first bridge 225 a. The distance between the first bridge portion 225a and the second bridge portion 225b is smaller than the distance between the mating portion 221 of the first mating signal terminal S1 'and the mating portion 221 of the second mating signal terminal S2'. The first bridge portion 225a and the second bridge portion 225b protrude from the insulation support frame 21.

The intermediate portion 223 of the first mating signal terminal S1 'includes a first straight strip 223a connected to the first bridge portion 225a, and the first straight strip 223a is parallel to the mating portion 221 of the first mating signal terminal S1'. The intermediate portion 223 of the second mating signal terminal S2 'includes a second straight strip portion 223b connected to the second bridge portion 225b, the second straight strip portion 223b being parallel to the mating portion 221 of the second mating signal terminal S2'. The distance between the first and second straight portions 223a and 223b is smaller than the distance between the mating portion 221 of the first mating signal terminal S1 'and the mating portion 221 of the second mating signal terminal S2'. In the illustrated embodiment of the present invention, the first straight portion 223a and the second straight portion 223b are located in the insulating support frame 21.

The mating portions 221 of the first and second mating signal terminals S1 'and S2' are located between the mating portions 221 and 221 of the first and second mating ground terminals G1 'and G2'. The first bridge portion 225a extends to a wide surface away from the butting portion 221 of the first butt ground terminal G1 ', and the second bridge portion 225b extends to a wide surface away from the butting portion 221 of the second butt ground terminal G2 ', so that a distance between the wide surface of the butting portion 221 of the first butt ground terminal G1 ' and the first bridge portion 225a is greater than a distance between the wide surface of the butting portion 221 of the first butt ground terminal G1 ' and the butting portion 221 of the first butt signal terminal S1 '; meanwhile, a distance between the wide surface of the butting portion 221 of the second butting ground terminal G2 ' and the second bridging portion 225b is greater than a distance between the wide surface of the butting portion 221 of the second butting ground terminal G2 ' and the butting portion 221 of the second butting signal terminal S2 '.

In the illustrated embodiment of the present invention, the first metal shielding plate 23 and the second metal shielding plate 24 are symmetrically disposed on two sides of the insulating support frame 21. Referring to fig. 26, the first metal shielding plate 23 includes a first main body 231 and a first extending portion 232 extending from the first main body 231. The first body 231 is located at one side of the middle portion 223 of the mating conductive terminal 22, and the first extension 232 is located at one side of the mating portion 221 of the mating conductive terminal 22. In the illustrated embodiment of the present invention, the first extension portion 232 and the first main body portion 231 are located in different planes, wherein the first extension portion 232 is farther from the second metal shielding plate 24 than the first main body portion 231.

Similarly, referring to fig. 26, the second metal shielding plate 24 includes a second main body portion 241 and a second extending portion 242 extending from the second main body portion 241. The second main body portion 241 is located at the other opposite side of the middle portion 223 of the mating conductive terminal 22, and the second extending portion 242 is located at the other opposite side of the mating portion 221 of the mating conductive terminal 22. In the illustrated embodiment of the present invention, the second extending portion 242 and the second main body portion 241 are located in different planes, wherein the second extending portion 242 is farther away from the first metal shielding plate 23 than the second main body portion 241.

Referring to fig. 30-32, in practical use, the performance of the connectors is integrated based on the performance of the various mating states, since the mating backplane connector 100 and the backplane connector 200 may have various mating states, such as a plugged-in state and a plugged-out state.

Referring to fig. 32, in the illustrated embodiment of the present invention, when the mating backplane connector 100 and the backplane connector 200 are in the unmated state, a distance between the tab 667 of the metal shielding enclosure 66 and the first bridge 225a or the second bridge 225b of the adjacent mating conductive terminal 22 is D1. The effect of impedance stabilization in this state can be achieved by adjusting the value of D1. It should be noted that the term "unmated state" used in the present invention means that the mating conductive terminals 22 of the mating backplane connector 100 are in contact with the conductive terminals 62 of the backplane connector 200, but do not reach the final contact position.

Referring to fig. 31, in the illustrated embodiment of the present invention, when the mating backplane connector 100 and the backplane connector 200 are in the mated state, a distance between the protruding piece 667 of the metal shielding enclosure 66 and the mating portion 221 of the adjacent mating conductive terminal 22 is D2. The value of D2 can be determined according to actual conditions to achieve the effect of impedance stabilization in this state. In other words, by providing the first notch 225a1 and the second notch 225b1, D2 can be better adjusted, so that the impedance can be stabilized whether the docking backplane connector 100 and the backplane connector 200 are in the plugged-in state or the unplugged state.

In the related design in which the first notch 225a1 and the second notch 225b1 are not provided, if such related design is to satisfy the distance D1 when the docking backplane connector 100 and the backplane connector 200 are in the unplugged state, the distance D2 when the docking backplane connector 100 and the backplane connector 200 are in the plugged-in state is necessarily too short, which is disadvantageous to achieve the effect of impedance stabilization; likewise, if such a related design is designed to satisfy the distance D2 when the docking backplane connector 100 and the backplane connector 200 are in the plugged-in-place state, the distance D1 when the docking backplane connector 100 and the backplane connector 200 are in the unplugged-in-place state is necessarily too short, which is also disadvantageous for achieving the impedance stabilization effect.

Based on a great deal of research and experiments, the inventors of the present invention found that the shortest distance between the metal shielding enclosure 66 and the abutting conductive terminal 22 has an important influence on the impedance stability. Compared with the prior art, the first notch 225a1 and the second notch 225b1 are provided, so that the distances D1 and D2 can be maintained within a proper value range when the docking backplane connector 100 and the backplane connector 200 are in the non-inserted state and the inserted state, and are neither too large nor too small, thereby achieving the effect of stabilizing impedance.

The above embodiments are only for illustrating the invention and not for limiting the technical solutions described in the invention, and the understanding of the present invention should be based on the technical personnel in the technical field, and although the present invention has been described in detail by referring to the above embodiments, the technical personnel in the technical field should understand that the technical personnel in the technical field can still make modifications or equivalent substitutions to the present invention, and all the technical solutions and modifications thereof without departing from the spirit and scope of the present invention should be covered in the claims of the present invention.