阅读说明：本技术 一种高速性能稳定的背板连接器 (High-speed stable backplane connector of performance ) 是由 蔡社民 刘世庆 李伟 游静元 何斌 李运明 于 2020-08-26 设计创作，主要内容包括：本发明公开了一种高速性能稳定的背板连接器,包括一组轴对称的差分对端子对、一组U型槽返回路径端子、和一个U型塑胶绝缘基座,一差分对端子对和一组U型槽返回路径端子构成了一差分对组合单元每个差分组合单元的塑胶底座上,位于U形端子和差分对端子对之间,设置有空气孔。差分对主要耦合边缘设置平整,改善了信号完整性；差分对次要耦合边缘设置凹凸满足了制造性。(The invention discloses a high-speed stable-performance backplane connector which comprises a group of axisymmetric differential pair terminal pairs, a group of U-shaped groove return path terminals and a U-shaped plastic insulation base, wherein the differential pair terminal pairs and the group of U-shaped groove return path terminals form a plastic base of each differential combination unit of the differential pair combination unit, and air holes are arranged between the U-shaped terminals and the differential pair terminal pairs. The main coupling edges of the differential pairs are arranged smoothly, so that the signal integrity is improved; the provision of the asperities on the secondary coupling edges of the differential pairs satisfies manufacturability.)

1. A high-speed performance-stabilized backplane connector comprising:

the base comprises two side wings and a base, the side wings are provided with guide positioning grooves, the base is provided with a differential pair combined unit array,

a differential pair of terminals connected to the base, the differential pair of terminals including two terminals, the terminals including a primary coupling edge and a secondary coupling edge, the edges of the two terminals being aligned with each other,

a channel terminal supported by the base, the channel terminal including a base and two side walls symmetrically connected to the base, the side walls having mating edges.

2. The backplane connector of claim 1, wherein the base is a U-shaped insulator and the differential pair block has air holes formed therein.

3. A high speed performance stable backplane connector as claimed in claim 2, wherein said differential pair combining unit comprises a U-shaped first hole for connecting the loop terminals and a second hole for connecting the differential line group, said air hole being provided between the first hole and the second hole.

4. The backplane connector of claim 2, wherein the differential pair assemblies are distributed on the base in an array, and the odd columns of the differential pair assemblies are offset from the even columns.

5. The backplane connector of claim 1, wherein the two symmetrical side edges of the base are provided with side wings connected to the base, and the opposite surfaces of the two side wings are respectively provided with a plurality of positioning slots, wherein the positioning slots of one side wing are staggered with the positioning slots of the other side wing.

6. A high speed performance-stable backplane connector according to claim 1, wherein said differential pair of terminals comprises two terminals arranged in axial symmetry, said terminals comprising, from one end to the other end, a first contact portion for mating with a connector, a fixing portion for connecting with the base, and a second contact portion for connecting with the circuit board, said fixing portions of said terminals comprising a primary coupling edge having a straight feature and a secondary coupling edge having a concave-convex feature.

7. A high speed performance stable backplane connector as claimed in claim 6, wherein said primary coupling edge is of a straight configuration from end to end along the axis of the terminal.

8. A high speed performance stable backplane connector as claimed in claim 6, wherein said secondary coupling edge is a continuous relief structure along the axis of the terminal from one end to the other.

9. The backplane connector of claim 6, wherein a portion of the secondary coupling edge is recessed into the retention edge of the terminal by an amount greater than zero, the width of the retention portion of the terminal is greater than the maximum width of the second contact portion, and each retention edge is raised above the maximum edge of the second contact portion by an amount greater than zero.

10. The high speed, stable backplane connector of claim 6, wherein said terminals are configured with press-in shoulders.

Technical Field

The invention belongs to the technical field of electric connectors, and particularly belongs to the field of high-density high-speed digital communication connectors.

Background

Under the vigorous development of the 5G (fifth generation mobile communication technology), IOT (internet of things), big data, cloud, intelligent driving, intelligent medical treatment, intelligent families and the like, the requirements on the data transmission rate for various high-speed digital communication systems and equipment are higher and higher. The high-speed digital communication backplane connector is an important basic component of a high-speed communication system and equipment. The signal integrity performance of the connector seriously affects the performance of high-speed digital communication systems and equipment. At present, a single-channel backplane connector with 5Gbp transmission rate cannot meet the requirement of high-speed digital communication systems and equipment on high-speed data transmission rate. But rather, backplane connectors are required to achieve single channel transmission rates of 10Gbps, 28 Gbps, and thus 56Gbps, 122Gbps, and even higher.

However, most backplane connectors in China currently have single-channel high-speed data transmission rates of less than 28 Gpbs. Therefore, it is very important and necessary to research the backplane connector and its structure to improve the high speed data transmission rate of the backplane connector. The existing backplane connector is analyzed and researched, the differential pair is improved by adopting the differential processing of the primary coupling edge and the secondary coupling edge of the differential pair, the targeted coupling edge design and the corresponding processing technology; meanwhile, the backplane connector base is improved and optimized by utilizing the physical characteristics of low dielectric constant and dissipation coefficient of air. Through the improvement and optimization, the backplane connector with stable high-speed performance is obtained. The connector has the advantages of good differential impedance matching and stable signal integrity performance, so that the single-channel transmission rate of the high-speed data communication backplane connector is improved.

Disclosure of Invention

The invention aims to improve the transmission rate of a high-speed data communication backplane connector and provide a backplane connector with stable high-speed performance.

In order to achieve the purpose, the invention adopts the following technical scheme:

a high speed performance stabilized backplane connector comprising:

the base comprises two side wings and a base, the side wings are provided with guide positioning grooves, the base is provided with a differential pair combined unit array,

a differential pair of terminals connected to the base, the differential pair of terminals including two terminals, the terminals including a primary coupling edge and a secondary coupling edge, the edges of the two terminals being aligned with each other,

a channel terminal supported by the base, the channel terminal including a base and two side walls symmetrically connected to the base, the side walls having mating edges.

In the above technical solution, the base is a U-shaped insulator, and the differential pair combining unit is provided with an air hole.

In the above technical solution, the differential pair combination unit includes a U-shaped first hole for connecting the circuit terminal, and a second hole for connecting the differential line group, and the air hole is disposed between the first hole and the second hole.

In the above technical solution, the differential pair combination units are distributed on the base in an array, and the position distribution of the odd-numbered columns and the position distribution of the even-numbered columns of the differential pair combination unit columns are staggered with each other.

In the above technical scheme, two symmetrical side edges on the base are provided with side wings connected with the base, the opposite surfaces of the two side wings are respectively provided with a plurality of positioning grooves, and the positioning groove on one side wing and the positioning groove on the other side wing are arranged in a staggered manner.

In the above technical solution, the differential pair terminal pair includes two terminals distributed in axial symmetry, the terminals include, from one end to the other end, a first contact portion inserted into the connector, a fixing portion connected to the base, and a second contact portion connected to the circuit board, and the fixing portion of the terminal includes a primary coupling edge having a straight feature and a secondary coupling edge having a concave-convex feature.

In the above solution, the main coupling edge is a straight structure from one end to the other end along the axis of the terminal.

In the above technical solution, the secondary coupling edge is a continuous concave-convex structure from one end to the other end along the axis of the terminal.

In the above technical solution, a part of the secondary coupling edge is recessed into the edge of the fixing portion of the terminal, the recessed amount is greater than zero, the width of the fixing portion of the terminal is greater than the maximum width of the second contact portion, and each fixing edge is higher than the maximum edge of the second contact portion by an amount greater than zero.

In the above technical solution, the terminal is designed with a press-in shoulder.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

in order to achieve the purpose of improving the performance of the signal integrity of the product and the stability of the signal integrity, the invention adopts an excellent manufacturing process scheme and a good coupling edge design in a differential pair important coupling area; in the secondary coupling area of the differential pair, the requirements of product manufacturability and assembly are designed in the area by adopting a poor process scheme and a relatively poor coupling edge design. The manufacturing process and design are targeted, so that the requirements of the product on manufacturability and assembly are met, the performance of the signal integrity of the product is improved, and the stability of the signal integrity is improved.

In order to achieve the purpose of differential impedance matching of the differential pair, the invention recesses part of the secondary coupling edge into the holding part of the terminal at the part of the terminal held by plastic, thereby raising the impedance of the differential pair and further achieving the purpose of good matching of the differential impedance.

For the purpose of assembling the differential pair terminal pair, the invention designs the width of the terminal holding part to be larger than the maximum width of the EON, and each holding edge is higher than the maximum edge of the EON. Press-in shoulders are designed on each terminal to press the differential pair of terminals into the retention plastic.

The invention realizes the purpose of improving the differential impedance and the insertion loss, and utilizes the material characteristics of low dielectric constant and small dissipation coefficient of air, and an air area is arranged at the bottom of the U-shaped hole of the differential pair combination unit and is positioned between the differential pair hole and the bottom of the U-shaped hole. Because this air region has a low dielectric constant and dissipation coefficient, coupling between the signal metal conductor differential pair path and the signal U-shaped metal return path is reduced, thereby improving differential impedance and, at the same time, insertion loss.

In order to achieve the purpose of smooth matching of connectors, the invention is provided with a plurality of guiding positioning grooves arranged on a side wing with guiding positioning, and a plurality of guiding positioning grooves arranged on the other side wing with guiding positioning; and the positioning guide grooves have a specific positional relationship.

In order to realize the purpose of high density, high speed and data transmission, the differential pair combination units on the base are distributed in an array. And the differential pair combination unit array group are arranged in a staggered mode at specific positions.

Drawings

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic diagram of a high speed performance stable backplane connector;

FIG. 2 is a schematic diagram of a differential pair terminal pair;

FIG. 3 is a schematic diagram of the primary and secondary coupling edges of a differential pair terminal pair;

FIG. 4 is a state diagram;

FIG. 5 is a schematic view of the assembly features of the differential pair terminal pairs;

FIG. 6 is a schematic view of an improved U-shaped insulator base;

FIG. 7 is a schematic view of another perspective of FIG. 6;

FIG. 8 is a schematic diagram of a differential pair combining unit;

FIG. 9 is a schematic diagram of an array of differential pair combining units;

FIG. 10 is a schematic view of a single differential pair terminal pair and U-groove terminals mounted on a plastic base;

wherein: 1 is a base, 2 is a differential pair terminal pair 3 is a U-shaped groove terminal, 21, 22 is an isolated single terminal, 211, 221 is a contact portion, 212, 222 is a holding portion, 213, 223 is an EON crimp portion of a PCB, 214, 224 are press-in shoulders, 2121, 2221 are primary coupling edges, 2122, 2222 are secondary coupling edges, b is an amount of recess, 2122_1, 2122_3 and 2222_1, 2222_3 are holding edges,

2122_2, 2222_2 recessed edge, w1, w2 holding site width, w3 EON width; a1, a2 are the maximum margin of the holding edge above the EON, 12 is the differential pair combination unit composed of differential pair holes, 121, 122 is the differential pair hole, 123 is the U-shaped hole, 1231, 1232 are the air holes, 13 is the side wing with guiding orientation, 131, 132 is the guiding orientation slot, 2 is the signal terminal, 14 is another side wing with guiding orientation, 141, 142 is the guiding orientation slot, 3 is the U-shaped loop terminal, 12a, 12b is the differential pair combination unit array group.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

Example one

As shown in fig. 2, the differential pair terminal pair 2 is composed of two axisymmetric or nearly axisymmetric terminals 21 and 22, and includes contact portions 211 and 221 when mating with other connectors, terminal fixing portions 212 and 222 fixed by a plastic base, and EON contact portions 213 and 223 crimped to a PCB.

As shown in fig. 3, the main coupling edges 2121 and 2221 of the fixing portions of the differential pair terminal pair 2 are flat designed using a press-forming process. While the secondary coupling edges 2122 and 2222 of the fixing portions of the differential pair terminal pair 2 are mainly used for manufacturing design, a manufacturing scheme combining an assembly jig cutting process and a punching cutting process is adopted.

The secondary coupling edges 2122 and 2222 of the fixing portions 212 and 222 of the differential pair terminal pair 2 are a continuous side surface, and the side surface may be provided with grooves, protrusions, barbs, etc. for various features to prevent the terminals 21 and 22 from being withdrawn from the differential pair holes 121 and 122 of the holding plastic base 1.

As shown in fig. 4, a portion of the secondary coupling edges 2122_2 and 2222_2 are recessed into the holding edges 2122_1 and 2122_3 and 2222_1 and 2222_3 of the terminal by an amount b greater than zero. The secondary coupling edges 2122_2 and 2222_2 adopt an assembly jig cutting process. The concave structure can increase the impedance of the differential pair, so as to achieve the purpose of good matching of differential impedance.

As shown in fig. 5, the widths w1 and w2 of the terminal holding portions are greater than the maximum width w3 of the EON, and each holding edge is raised above the maximum edge of the EON by an amount a1 and a2 greater than zero. Press-in shoulders 214 and 224 are designed on each terminal 21 and 22 so that the differential pair terminals 21 and 22 press into the positioning holes 121 and 122 in the holding plastic base 1.

As shown in fig. 6 and 7, the base is a U-shaped insulator including a base 11 having an array of differential pair combining units 12, a wing 13 having a guide orientation, and another wing 14 having a guide orientation. The two side wings are used for guiding and positioning in the non-insertion direction when the connectors are plugged. In this embodiment, the side flaps 13, 14 are fixedly connected to the chassis 11 as a unitary structure.

As shown in fig. 8, the differential pair combining unit 12 includes: a first hole for connection with the U-shaped loop terminal 3, the first hole being a U-shaped hole 123; a second hole for connecting a differential signal connector, the second hole being two differential pair holes 121, 122; and a third hole for vacant is arranged between the bottom edge of the first hole and the second hole, the third hole is an air hole 1231, 1232, and the third hole is communicated with the first hole.

In this embodiment, two differential pair holes 121, 122 are symmetrically distributed on the U-shaped surface in the U-shaped hole, and one differential hole corresponds to one air hole. All structures in the whole differential pair combination unit 12 are distributed with central axis symmetry.

As shown in fig. 9, a plurality of differential pair combination units 12 are distributed in an array on the base 11, and the differential pair combination units 12 are positionally shifted with respect to each other, for example, the differential pair combination unit array group 12a in odd columns and the differential pair combination unit array group 12b in even columns are misaligned.

In this embodiment, as shown in fig. 6 and 7, a plurality of positioning grooves 131, 132, 141, 142 are disposed on the inner side surfaces of the two symmetrical side wings, and the positioning grooves on the two side wings are staggered with respect to each other, so that the base has guiding and positioning functions when being inserted into the connector.

As shown in fig. 10, which is an illustration of the interface between the present embodiment and the connector, when the differential signal terminal 2 is connected to the second holes 121 and 122, and the U-shaped loop terminal 3 is connected to the first hole 123, because no connection is made in the third holes 1231 and 1232, an air wall is formed between the differential signal terminal 2 and the U-shaped loop terminal 3, so that the coupling between the signal ends is reduced, the differential impedance is improved, and the insertion loss is reduced.

As shown in fig. 1, which is a schematic view of the overall structure of the connector, a plurality of differential pair combination units and U-shaped loop terminals, which are matched with each other, are connected to the U-shaped base and are distributed with a mutual offset.

The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.