CN114661109B - Multipath cross-node signal interconnection structure - Google Patents

Abstract

The invention discloses a multi-channel cross-node signal interconnection structure, and relates to the technical field of server hardware equipment. The structure includes a front module, a middle module and a rear module in sequence from the front to the rear, the rear module includes M computing nodes, the computing nodes include a main board, and N CPUs are arranged on the main board. The middle module includes a backplane support, and the front module includes a hard disk module. Between the front module and the rear module, there are M*N first blind-mating connectors corresponding to the CPUs in the rear module one-to-one, and the CPU and the hard disk module are realized through the first blind-mating connectors. signal connection between. There are N groups of inter-board signal connection components used to realize the interconnection of two main boards between the middle module and the rear module, and the inter-board signal connection components correspond to the CPUs on the main board one by one. This structure can effectively solve the problem of signal interconnection between computing nodes and ensure the integrity of signals.

Description

A multi-channel cross-node signal interconnection structure

technical field

The invention relates to the technical field of server hardware equipment, in particular to a multi-channel cross-node signal interconnection structure.

Background technique

At present, two-socket and four-socket servers can usually be achieved by wiring on one motherboard, but the length of the four CPUs on the same motherboard has reached the limit of the current general-purpose server. It will bring many problems. For example, the depth of the server is too long and it is difficult to put it on the shelf, the processing technology of the motherboard is difficult, and the length of the signal line is too long to affect the signal. Therefore, servers with higher access paths need to use multiple motherboards and multiple nodes, as shown in Figure 1. This method can not only increase the channel but also reduce the length of the motherboard and the depth of the chassis. However, the problem of signal interconnection among various nodes needs to be solved.

Contents of the invention

In view of the above problems, the present invention provides a multi-channel cross-node signal interconnection structure, which can effectively solve the problem of signal interconnection between computing nodes and ensure signal integrity.

The technical scheme that the present invention solves its technical problem to take is:

A multi-channel cross-node signal interconnection structure, including a front module, a middle module, and a rear module from front to back, the rear module includes M computing nodes, the computing nodes include a main board, and the There are N CPUs on the motherboard;

The middle module includes a backplane bracket, and the front module includes a hard disk module;

Between the front module and the rear module, there are M*N first blind-mating connectors corresponding to the CPU in the rear module one-to-one, and the CPU and the hard disk module are realized through the first blind-mating connector. The signal connection between;

Between the middle module and the rear module, there are N groups of inter-board signal connection components used to realize the interconnection of two main boards, and the inter-board signal connection components correspond to the CPU on the main board;

组连接器组，所述的连接器组包括两个连接器，两个连接器公端固定设置于所述的背板支架上，两个连接器母端分别固定设置于被连接的两个主板上。The inter-board signal connection assembly includes

A connector group, the connector group includes two connectors, the male ends of the two connectors are fixed on the backplane bracket, and the female ends of the two connectors are respectively fixed on the two main boards to be connected superior.

Further, the front module includes a front plug-in box, the rear end of the front plug-in box is fixedly provided with a front module positioning bracket, and the male end of the first blind-mate connector is fixedly arranged on the front module positioning bracket , and the male end of the first blind-mating connector is connected to the hard disk module through a cable, and the female end of the first blind-mating connector is fixedly arranged on the main board.

Further, the front module positioning bracket is provided with a first installation hole, and the front module positioning bracket is located on one side of the first installation hole and is provided with a first installation hole communicating with the first installation hole. an auxiliary mounting hole.

Further, the backplane support is provided with an avoidance hole for accommodating the male end of the first blind-mating connector.

Further, the escape hole provided on the backplane bracket matches the shape of the front end of the front module positioning bracket, and when the front module is installed in place, the front end of the front module positioning bracket is inserted into the in the avoidance hole.

Further, the number of the main boards is an even number, and is sequentially divided into multiple board groups from top to bottom, and each board group includes two main boards;

The connector group used to connect the two motherboards in the board group adopts high-density connectors, the backplane bracket is fixedly arranged on the backplane, and the male end of the high-density connector is arranged on the backplane, and the high-density connection The female end of the device is set on the main board;

The connector group used to connect the two motherboards between the board groups adopts the second blind-mating connector, and the male ends of the two second blind-mating connectors are arranged on the backplane bracket and connected by cables. The two second blind-mating connectors The female end of the plug connector is provided on the main board.

Further, the backplane bracket is provided with a second installation hole corresponding to the male end of the second blind mating connector one by one, and the backplane bracket is provided with a hole communicating with the second installation hole. Second auxiliary mounting hole.

Further, both the female end of the first blind-mating connector and the female end of the second blind-mating connector are fixedly connected to the main board through a fixing bracket, and the fixing bracket includes a fixing shell with an open lower end, and the Both the front side wall and the rear side wall of the fixed case are provided with avoidance gaps, and the lower end of the fixed case is fixedly connected with the main board through fasteners.

Further, several partitions are arranged in the fixed shell, and the partitions divide the inner space of the fixed shell into several fixed cavities, and the front side wall and the rear side wall of each fixed cavity There are gaps for avoidance.

Further, the lower end of the fixed shell is provided with a positioning post, and the said main board is provided with a first positioning hole matching with said positioning post.

The beneficial effects of the present invention are:

1. This structure can ensure the effective docking of the interconnection connector and the integrity of the signal, thus effectively solving the problem of multi-channel server signal interconnection.

2. The female end of the blind mating connector in this structure is fixed on the main board through the fixing bracket, which is not only convenient for installation, but also allows a certain gap between the fixing cavity of the fixing bracket and the female end of the blind mating connector to allow the blind mating The female end of the plug-in connector has a certain offset range in the fixed bracket, so that when the blind-mating connectors are mated, they can align themselves in a certain space, and have a self-guiding function, which is conducive to the effective operation of the blind-mating connectors. Plug in.

Description of drawings

FIG. 1 is a schematic diagram of a three-dimensional structure of the interconnection structure;

Fig. 2 is the front view of this interconnection structure;

Figure 3 is an exploded view of the interconnection structure;

Fig. 4 is a schematic diagram of the connection structure between the positioning bracket of the front module and the male end of the blind mating connector;

Fig. 5 is a schematic diagram of the three-dimensional structure of the middle module;

Figure 6 is a rear view of the middle module;

Figure 7 is an exploded view of the middle module;

Fig. 8 is a schematic diagram of the three-dimensional structure of the middle module II;

Fig. 9 is a schematic diagram of an enlarged structure of part A in Fig. 7;

FIG. 10 is a schematic diagram of a three-dimensional structure of a computing node (with the rear box removed);

Fig. 11 is a schematic diagram of the enlarged structure of part B in Fig. 10;

Fig. 12 is an exploded view of the first blind-mating connector female end and the second blind-mating connector female end and the installation structure of the main board;

Fig. 13 is a schematic diagram of the three-dimensional structure of the female end of the second blind mating connector;

Fig. 14 is a schematic perspective view of the fixed bracket.

In the figure: 1-front module, 11-front module positioning bracket, 111-vertical plate, 112-connecting plate, 113-the first installation hole, 114-the first auxiliary installation hole,

2-middle module, 21-backplane bracket, 211-avoidance hole, 212-second installation hole, 213-second auxiliary installation hole, 22-backplane,

3-rear module, 31-main board, 311-first positioning hole, 312-second positioning hole,

41-the male end of the first blind mating connector, 42-the female end of the first blind mating connector,

51-high-density connector male end, 52-high-density connector female end,

61-the male end of the second blind mating connector, 62-the female end of the second blind mating connector, 621-the positioning protrusion,

7-fixed bracket, 71-fixed shell, 72-avoidance gap, 73-positioning column, 74-flange, 75-partition,

8 - Cable.

Detailed ways

Embodiment one

For the convenience of description, the coordinate system is defined as shown in Figure 1, and the left and right directions are horizontal, the front and rear directions are vertical, and the up and down directions are vertical.

As shown in FIG. 1 and FIG. 3 , a multi-channel cross-node signal interconnection structure includes a front module 1 , a middle module 2 and a rear module 3 in sequence from front to back.

The rear module 3 includes M computing nodes arranged in the up and down direction, and the computing nodes include a rear insertion box (not shown in the figure), and the rear insertion box is connected to the main chassis of the server Slidingly connected, the rear insertion box can slide back and forth relative to the server main chassis. A motherboard 31 is arranged in the rear sub-box, and N CPUs (not shown in the figure) are arranged on the motherboard 31 .

The middle module 2 includes a backplane 22 bracket 21, and the backplane 22 bracket 21 is fixedly connected to the chassis (not shown in the figure).

The front module 1 is a pullable movable module, the front module 1 includes a front insertion box (not shown in the figure), and the front insertion box is slidably connected with the server main chassis, so The front insertion box can slide back and forth relative to the server main chassis. A hard disk module (not shown in the figure) and a fan module (not shown in the figure) are arranged in the front insert box.

A first blind plug connector for connecting the CPU and the hard disk module is arranged between the front module 1 and the rear module 3 , so as to realize HDD signal connection to the motherboard 31 . The number of the first blind-mating connectors is the same as the number of CPUs in the rear module 3 , and there is a one-to-one correspondence. That is, the number of the first blind-mate connectors is M*N.

As a specific implementation, in this embodiment, the rear end of the front box is fixedly provided with a front module positioning bracket 11 . The first blind-mate connector includes a first blind-mate connector male end 41 and a first blind-mate connector female end 42 . Wherein the first blind mating connector male end 41 is fixedly arranged on the front module positioning bracket 11, and the first blind mating connector male end 41 is connected to the hard disk through the cable 8 The modules are connected; the first blind plug connector female end 42 is fixedly arranged on the main board 31 provided with the corresponding CPU.

组连接器组，所述的连接器组包括两个连接器，所述的连接器包括连接器公端和连接器母端，其中两个所述连接器公端固定设置于所述的背板22支架21上，并通过信号连接件相连，两个所述连接器母端分别固定设置于被连接的两个主板31上。Between the described middle module 2 and the rear module 3, there are N groups of board-to-board signal connection assemblies for realizing the interconnection of two mainboards 31. The numbers are the same and correspond to each other. The inter-board signal connection assembly includes

A connector group, the connector group includes two connectors, the connectors include a connector male end and a connector female end, wherein the two connector male ends are fixedly arranged on the backplane 22 on the bracket 21 and connected by a signal connector, and the two connector female ends are respectively fixed on the two main boards 31 to be connected.

连接器组，整个中模组2和后模组3之间设置有12个(2*6)连接器组。As a specific implementation manner, the rear module 3 described in this embodiment includes 4 computing nodes arranged in the vertical direction, and each of the main boards 31 is provided with 2 CPUs. Correspondingly, the number of the first blind mating connectors is 8 (4*2), and two sets of inter-board signal connection components are arranged between the middle module 2 and the rear module 3, each group of inter-board signal connection components Signal Connection Kits each include 6

As for the connector group, there are 12 (2*6) connector groups arranged between the middle module 2 and the rear module 3 .

As a specific implementation, as shown in Figure 3, four front module positioning brackets 11 are arranged on the front plug box described in this embodiment, as shown in Figure 4, each of the front module positioning Two first blind-mating connector male ends 41 are arranged on each bracket 11 .

As shown in Figure 4, the front module positioning bracket 11 includes a riser 111, and the upper and lower ends of the riser 111 are respectively provided with connecting plates 112 extending to the front side perpendicular to the riser 111. , and the connecting plate 112 is fixedly connected with the front socket. The male end 41 of the first blind mating connector is disposed on the riser 111 .

As shown in FIG. 4 , the riser 111 is provided with first installation holes 113 corresponding to the two male ends 41 of the first blind-mate connectors. The shape of the first installation hole 113 is the same as that of the existing installation hole for installing the male end 41 of the first blind mating connector, and will not be repeated here. The vertical plate 111 or the connecting plate 112 is provided with a first auxiliary mounting hole 114 communicating with the first mounting hole 113 . As a specific implementation, in this embodiment, the first auxiliary installation hole 114 communicating with the first installation hole 113 at the top is provided on the connecting plate 112 at the upper side, and connected with the first installation hole 113 at the bottom. The through first auxiliary installation hole 114 is provided on the riser 111 and above the first installation hole 113 located below.

When installing the first blind-mating connector male end 41, first place the first blind-mating connector male end 41 vertically, and then pass through the first auxiliary installation hole 114 from front to back, so that the first blind-mating connector male end 41 The whole is located on the rear side of the riser 111 , and then the male end 41 of the first blind mating connector is rotated 90° and moved downwards so that it is aligned with the first installation hole 113 . Then install the male end 41 of the first blind-mating connector. This installation process is the same as that of the existing male end of the blind-mating connector, and will not be repeated here.

In this way, in the actual installation process, the first blind-mating connector male end 41 can be connected to the hard disk module through the cable 8, and then the first blind-mating connector male end 41 can be fixed on the front module for positioning. On the bracket 11, the installation is more convenient.

Further, the support 21 of the backplane 22 is provided with an avoidance hole 211 for accommodating the male end 41 of the first blind-mate connector, and when the front module 1 is installed in place, the front module The male end 41 of the first blind mating connector on the positioning bracket 11 extends through the escape hole 211 to the rear side of the bracket 21 of the backplane 22 .

Further, the number of the main boards 31 is an even number. For the convenience of description, the multiple main boards 31 are now divided into a plurality of board groups from top to bottom, and each board group includes two main boards 31 . As a specific implementation manner, the main board 31 described in this embodiment is divided into two board groups, the two upper main boards 31 form the first board group, and the lower two main boards 31 form the second board Group.

The connector group used to connect the two main boards 31 in the group of boards 112 uses a high-density connector, and the two high-density connectors realize signal connection through the backplane 22 . Specifically, the backplane 22 is fixedly arranged on the bracket 21 of the backplane 22, the male end 51 of the high-density connector is fixedly arranged on the backplane 22, and the female end 52 of the high-density connector is fixedly arranged on the main board 31. .

The connector group used to connect the two main boards 31 between the groups of boards 112 adopts a second blind-mating connector, and the two second blind-mating connector male ends 61 are fixedly arranged on the support 21 of the backplane 22, and pass through The cable 8 realizes the signal connection, and the female ends 62 of the two second blind mating connectors are fixedly arranged on the main board 31 .

Specifically, for the convenience of description, the four main boards 31 are now named as the first main board 31 , the second main board 31 , the third main board 31 and the fourth main board 31 from top to bottom. The CPU located on the left side of the first main board 31 is named CPU11 , and the CPU located on the right side of the first main board 31 is named CPU12 . The CPU located on the left side of the second main board 31 is named CPU21 , and the CPU located on the right side of the second main board 31 is named CPU22 . The CPU located on the left side of the third main board 31 is named CPU31, and the CPU located on the right side of the third main board 31 is named CPU32. The CPU located on the left side of the fourth main board 31 is named CPU41 , and the CPU located on the right side of the fourth main board 31 is named CPU42 . As shown in Figure 5, Figure 6 and Figure 7, as shown, 16 second blind-mate connectors are arranged in a matrix, named as the second blind-mate connector AB according to the position of the second blind-mate connector in the matrix, where A indicates the row where the second blind mate connector is located, and B indicates the column where the second blind mate connector is located. Similarly, 8 high-density connectors are arranged in a matrix, named high-density connector CD according to the position of the high-density connector in the matrix, where C indicates the row where the high-density connector is located, and D indicates the column where the high-density connector is located.

As shown in Figure 2, CPU11 and CPU21 are connected through high-density connector 11 and high-density connector 21, CPU11 and CPU31 are connected through second blind-mating connector 13 and second blind-mating connector 34, and CPU11 and CPU41 are connected through second blind-mating Connector 11 is connected with the second blind mating connector 41, CPU21 and CPU31 are connected with the second blind mating connector 31 through the second blind mating connector 21, and CPU21 and CPU41 are connected through the second blind mating connector 23 and the second blind mating connector 31. The connector 44 is connected, and the CPU31 and the CPU41 are connected through the high-density connector 31 and the high-density connector 41 . High density connector 11, high density connector 21, high density connector 31, high density connector 41, second blind mating connector 11, second blind mating connector 13, second blind mating connector 21, second blind mating connector 23. The second blind mate connector 31 , the second blind mate connector 34 , the second blind mate connector 41 , the second blind mate connector 44 , the cable 8 and the backplane 22 on the left together form a set of boards Inter-signal connection components.

CPU12 and CPU22 are connected by high-density connector 12 and high-density connector 22, CPU12 and CPU32 are connected by second blind-mating connector 14 and second blind-mating connector 33, CPU12 and CPU42 are connected by second blind-mating connector 12 and second Blind-mating connector 42 is connected, and CPU22 and CPU32 are connected with second blind-mating connector 32 through second blind-mating connector 22, and CPU22 and CPU42 are connected with second blind-mating connector 43 through second blind-mating connector 24, and CPU32 It is connected with CPU42 through high-density connector 32 and high-density connector 42 . High density connector 12, high density connector 22, high density connector 32, high density connector 42, second blind mating connector 12, second blind mating connector 14, second blind mating connector 22, second blind mating connector 24. The second blind mating connector 32, the second blind mating connector 33, the second blind mating connector 42, the second blind mating connector 43, the cable 8 and the backplane 22 on the right side together form another group Board-to-board signal connection components.

Further, as shown in Figure 3 and Figure 8, the avoidance hole 211 provided on the support 21 of the back plate 22 matches the shape of the front end of the front module positioning bracket 11, when the front module 1 When installed in place, the front end of the front module positioning bracket 11 is inserted into the escape hole 211 . In this way, when the front module 1 is installed, a first-level guide can be formed through the cooperation between the front module positioning bracket 11 and the avoidance hole 211, so that the blind mating connector (including the first blind mating connector and the second blind mating connection) The male end of the connector) is initially aligned with the female end of the blind mating connector (including the first blind mating connector and the second blind mating connector). Then continue to push in the front module 1, the guide post on the male end of the blind mate connector is inserted into the guide hole of the female end of the blind mate connector for secondary guidance, and finally ensure the male end and the female end of the blind mate connector Creates a precise docking to avoid collision damage.

As shown in FIG. 9 , the support 21 of the backboard 22 is provided with a second installation hole 212 corresponding to the male end 61 of the second blind-mate connector one by one. The shape of the second installation hole 212 is the same as that of the existing installation hole for installing the male end 61 of the second blind mating connector, and will not be repeated here. A second auxiliary mounting hole 213 communicating with the second mounting hole 212 is provided on the bracket 21 of the back plate 22 above the second mounting hole 212 .

The process of installing the second blind-mating connector male end 61 is the same as the process of installing the first blind-mating connector male end 41 , and will not be repeated here.

In this way, in the actual installation process, the two second blind mating connector male ends 61 can be connected through the cable 8 first, and then the second blind mating connector male ends 61 are fixed on the support 21 of the backplane 22 , the installation is more convenient.

As shown in FIG. 10 , both the first blind-mate connector female end 42 and the second blind-mate connector female end 62 are fixedly connected to the main board 31 through the fixing bracket 7 . As shown in Figure 11, the fixed bracket 7 includes a fixed shell 71 with an open lower end, and the front side wall and the rear side wall of the fixed shell 71 are provided with an avoidance gap 72 with the opening facing downward. The lower end of 71 is fixedly connected with the main board 31 through fasteners.

Further, the lower end of the fixed shell 71 is provided with a positioning column 73 , and the said main board 31 is provided with a first positioning hole 311 matched with the said positioning column 73 .

Further, the lower end of the fixing shell 71 is provided with a flange 74 extending outward, and the flange 74 is fixedly connected with the main board 31 by screws.

Further, several first blind-mate connector female ends 42 and/or second blind-mate connector female ends 62 adjacent to each other share one fixing bracket 7 . Several partitions 75 are arranged inside the fixed shell 71, and the partitions 75 divide the inner space of the fixed shell 71 into several for accommodating the first blind-mate connector female end 42 or the second blind-mate connector. In the fixing cavities of the female ends 62 of the blind mating connectors, the front and rear side walls of each of the fixing cavities are provided with avoidance notches 72 opening downward.

As a specific implementation, as shown in Figure 10, Figure 11 and Figure 12, the front end of the main board 31 is provided with two high-density connector female ends 52, and the left side of the high-density connector female end 52 on the left is arranged There are three blind-mating connector receptacles, which are the second blind-mating connector receptacle 62 , the first blind-mating connector receptacle 42 and the second blind-mating connector receptacle 62 from left to right. There are three blind-mating connector female ends located between the two high-density connector female ends 52, and from left to right are the second blind-mating connector female end 62, the second blind-mating connector female end 62 and The first blind mating connector female end 42 . Correspondingly, two partitions 75 are arranged inside the fixed shell 71, and the two partitions 75 divide the inner space of the fixed shell 71 into three fixed cavities.

Further, as shown in FIG. 12 and FIG. 13 , positioning protrusions 621 are provided on the lower end surfaces of the first blind-mating connector female end 42 and the second blind-mating connector female end 62 , and the main board 31 A second positioning hole 312 matching the positioning protrusion 621 is provided on the top.

Embodiment two

The connector groups in the inter-board signal connection assembly all use the second blind-mating connector, and the rest of the structure is the same as that of the first embodiment.

Claims (6)

1. A multi-channel cross-node signal interconnection structure, which includes a front module, a middle module and a rear module from front to back, and is characterized in that: the rear module includes M computing nodes, and the computing nodes Including a mainboard, N CPUs are arranged on the said mainboard; The middle module includes a backplane bracket, and the front module includes a hard disk module; Between the front module and the rear module, there are M*N first blind-mating connectors corresponding to the CPU in the rear module one-to-one, and the CPU and the hard disk module are realized through the first blind-mating connector. The signal connection between; Between the middle module and the rear module, there are N groups of inter-board signal connection components used to realize the interconnection of two main boards, and the inter-board signal connection components correspond to the CPU on the main board; The inter-board signal connection assembly includes A connector group, the connector group includes two connectors, the male ends of the two connectors are fixed on the backplane bracket, and the female ends of the two connectors are respectively fixed on the two main boards to be connected superior; The front module includes a front insertion box, the rear end of the front insertion box is fixedly provided with a front module positioning bracket, and the male end of the first blind mating connector is fixedly arranged on the front module positioning bracket, and The male end of the first blind-mating connector is connected to the hard disk module through a cable, and the female end of the first blind-mating connector is fixedly arranged on the main board; The backplane bracket is provided with an escape hole for accommodating the male end of the first blind-mating connector, and the escape hole provided on the backplane bracket matches the shape of the front end of the front module positioning bracket , when the front module is installed in place, the front end of the front module positioning bracket is inserted into the avoidance hole; The number of the main boards is an even number, and is divided into a plurality of board groups from top to bottom, and each board group includes two main boards; The connector group used to connect the two motherboards in the board group adopts high-density connectors, the backplane bracket is fixedly arranged on the backplane, and the male end of the high-density connector is arranged on the backplane, and the high-density connection The female end of the device is set on the main board; The connector group used to connect the two motherboards between the board groups adopts the second blind-mating connector, and the male ends of the two second blind-mating connectors are arranged on the backplane bracket and connected by cables. The two second blind-mating connectors The female end of the plug connector is provided on the main board; Both the female end of the first blind-mating connector and the female end of the second blind-mating connector are fixedly connected to the main board through the fixing bracket, and there is a space between the fixing cavity of the fixing bracket and the female ends of the two blind-mating connectors. A certain gap allows the female ends of the two blind mating connectors to have a certain offset range in the fixed bracket. When installing the front module, a first-level guide can be formed through the cooperation between the front module positioning bracket and the avoidance hole. Align the male end of the first blind mating connector with the female end of the first blind mating connector, and the male end of the second blind mating connector and the female end of the second blind mating connector, and then continue to push in the front When the module is assembled, the guide post on the male end of the first blind mate connector is inserted into the guide hole on the female end of the first blind mate connector, and the guide post on the male end of the second blind mate connector is then inserted into the second blind mate connector. Secondary guidance is carried out in the guide hole of the female end of the connector. 2. A multi-channel cross-node signal interconnection structure according to claim 1, characterized in that: said front module positioning bracket is provided with a first mounting hole, said front module positioning bracket is located at said second One side of a mounting hole is provided with a first auxiliary mounting hole communicating with the first mounting hole. 3. A multi-channel cross-node signal interconnection structure according to claim 1, characterized in that: said backplane support is provided with a second mounting hole corresponding to the male end of the second blind mating connector one by one, A second auxiliary installation hole communicating with the second installation hole is provided on the backplane bracket. 4. A multi-channel cross-node signal interconnection structure according to claim 1, characterized in that: the fixed bracket includes a fixed shell with an open lower end, and the front side wall and the rear side wall of the fixed shell are both An avoidance gap is provided, and the lower end of the fixed shell is fixedly connected with the main board through fasteners. 5. A multi-channel cross-node signal interconnection structure according to claim 4, characterized in that: said fixed shell is provided with several partitions, and said partitions divide the internal space of said fixed shell A number of fixed cavities are formed, and avoidance gaps are provided on the front and rear side walls of each of the fixed cavities. 6. A multi-channel cross-node signal interconnection structure according to claim 4, characterized in that: the lower end of the fixed shell is provided with a positioning column, and the main board is provided with a The first positioning hole.

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