Cable backboard device

Abstract

The embodiment of the invention provides a cable backboard device, which comprises at least one first circuit board and at least one second circuit board, and is characterized in that the first circuit board comprises a first board edge connector, a first chip and a first in-board connector; the second circuit board comprises a second board edge connector; the first board edge connector and the second board edge connector are in pluggable connection, so that the first circuit board and the second circuit board are vertically inserted and interconnected; the first board edge crimping connector is electrically connected with the first chip through a printed circuit board (PCB) transmission line, the first board edge straight-out connector is electrically connected with the first in-board connector through a flexible cable, and the first in-board connector is electrically connected with the first chip. According to the invention, the problems of high link loss and high cable management difficulty when the high-speed signal is transmitted through the backboard in the prior art are solved, and the effects of reducing the link loss and the cable management difficulty when the high-speed signal is transmitted through the backboard are achieved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of communications, and in particular, to a cable backplane device. Background Art

[0002] In the communication system, the backplane is an important component of the communication equipment, which is generally composed of a multi-layer printed circuit board (PCB), connectors, etc. With the continuous development of communication system technology, the demand for large-capacity communication systems requires that the high-speed signals in the backplane are increasingly dense, the signal transmission rate is getting higher and higher, and the size of the single board will become larger and larger. The high-speed signal transmission loss in the PCB is large, which will cause the integrity of the high-speed signal to inherently attenuate as the signal moves further along the entire channel. This phenomenon is called link loss. Therefore, how to minimize the link loss of high-speed signals on PCB has become the key to high-speed system design.

[0003] Compared with PCB backplane, the link loss of cable backplane is about one-fourth of that of PCB backplane, and cable backplane has good high-speed signal transmission characteristics. Some existing systems have replaced traditional backplanes with cable assemblies. However, it is difficult to package a large number of cable assemblies, and cable management is a limiting factor in such systems.

[0004] In summary, how to effectively reduce the link loss of high-speed signal transmission and perform reasonable cable management is a problem that needs to be solved now. Summary of the invention

[0005] The embodiment of the present invention provides a cable backplane device to at least solve the problems in the related art of large link loss and great difficulty in cable management when high-speed signals are transmitted through a backplane.

[0006] According to one embodiment of the present invention, a cable backplane device is provided, comprising: at least one first circuit board and at least one second circuit board, wherein the first circuit board comprises a first board edge connector, a first chip, and a first in-board connector; the second circuit board comprises a second board edge connector; the first board edge connector comprises a first board edge crimping connector and a first board edge straight-out connector; the first board edge connector and the second board edge connector are pluggable to allow the first circuit board and the second circuit board to be vertically plugged and interconnected; the first board edge crimping connector is electrically connected to the first chip via a printed circuit board PCB transmission line, the first board edge straight-out connector is electrically connected to the first in-board connector via a flexible cable, and the first in-board connector is electrically connected to the first chip.

[0007] Through the present invention, a cable backplane device is provided, including: at least one first circuit board and at least one second circuit board, wherein the first circuit board includes a first board edge connector, a first chip, and a first in-board connector; the second circuit board includes a second board edge connector; the first board edge connector includes a first board edge crimping connector and a first board edge straight-out connector; the first board edge connector and the second board edge connector are pluggable to connect so that the first circuit board and the second circuit board are vertically plugged and interconnected; the first board edge crimping connector is electrically connected to the first chip through a printed circuit board PCB transmission line, the first board edge straight-out connector is electrically connected to the first in-board connector through a flexible cable, and the first in-board connector is electrically connected to the first chip. Through the present invention, the problems of large link loss and high cable management difficulty when high-speed signals are transmitted through the backplane in the related art are solved, and the effect of reducing link loss and reducing cable management difficulty when high-speed signals are transmitted through the backplane is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a structural schematic diagram of a cable backplane device according to an embodiment of the present invention;

[0009] Figure 2 is a schematic diagram of the positional relationship between a first tray and a first circuit board according to an embodiment of the present invention;

[0010] Figure 3 is a schematic diagram of the positional relationship between a second tray and a second circuit board according to an embodiment of the present invention;

[0011] Figure 4 is a schematic diagram of one-to-many circuit board interconnection according to an embodiment of the present invention;

[0012] Figure 5 is a schematic diagram of many-to-many circuit board interconnection according to an embodiment of the present invention;

[0013] Figure 6 is a schematic diagram of the position relationship of the cable backplane device in the backplane architecture according to an embodiment of the present invention;

[0014] Among them, 100-first circuit board, 110-first chip, 132-first board edge crimping connector, 131-first board edge straight-out connector, 120-first in-board connector, 101-first PCB transmission line, 121-first flexible cable bundle, 200-second circuit board, 210-second chip, 232-second board edge crimping connector, 231-second board edge straight-out connector, 220-second in-board connector, 201-second PCB transmission line, 221-second flexible cable bundle, 300-first tray, 400-second tray, 010-center backplane, 020-backplane connector. DETAILED DESCRIPTION

[0015] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and in combination with the embodiments.

[0016] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0017] With the continuous development of communication system technology, the demand for large-capacity communication systems requires that high-speed signals in the backplane become more and more dense, the size of single boards becomes larger and larger, and the signal transmission rate becomes higher and higher. However, the transmission loss of high-speed signals in PCB is large, and link loss becomes a bottleneck in high-speed system design. As a result, the constraints on circuit board design, processing and board grade are becoming more and more stringent.

[0018] In the backplane system architecture of the related art, the circuit boards are connected vertically through at least one set of orthogonal connectors, that is, at least one set of plug-in male and female connectors, and the pins of the male and female connectors are rotated 90°, so the connector insertion loss is relatively large. In addition, the high-speed signal transmission on the board uses the PCB transmission line inside the board, which not only has high requirements on the board material and processing capabilities, but also has large PCB transmission line losses. The link loss is increasingly unable to meet the requirements as the rate increases. In traditional cable backplanes, high-speed signal transmission basically all needs to pass through cables, so a large number of cables need to be designed and managed, so it is difficult to package a large number of cable assemblies. Cable management is a limiting factor in this type of system.

[0019] Compared with the existing backplane system, the cable backplane device of the present application has at least one single board that uses both a board edge crimping connector and a straight-out cable connector, that is, part of the high-speed signal is transmitted through the PCB transmission line inside the board, and part is transmitted through the cable. The cable loss is significantly better than the PCB transmission line, which can not only improve the high-speed channel signal integrity (SI) performance, but also reduce the PCB channel loss pressure, thereby reducing the board grade or reducing the number of routing layers to reduce costs. And the straight-out cable connector may not contact the circuit board, and the size of the circuit board can be reduced accordingly, thereby solving the cost or problems caused by the excessive size of the single board. In addition, compared with the traditional cable backplane, the cable solution adopted in this proposal only exists inside each single board, and the number only covers some of the high-speed signals on the single board, so the cable management is relatively simple.

[0020] The cable backplane device provided in the embodiment of the present invention adopts a mixed interconnection scheme of traditional PCB transmission lines and cables in the daughter card (circuit board). Compared with the traditional single-board routing, the cable loss is lower, the number of layers and size of the circuit board can be reduced, the plate grade constraints are relaxed, and only some high-speed signals are transmitted by cables, which reduces the difficulty of cable management. In the actual implementation process, signals are interacted between different circuit boards, and the method of signal interaction is not limited. Specifically, part of the signal is transmitted through the PCB transmission line, and part of the signal is transmitted through the cable. The transmission method used by the specific different signals can be controlled by the control device or the signal transmission method can be set before the transmission starts. Afterwards, the cable backplane device provided in the embodiment of the present invention can be used to transmit the signal in the set manner.

[0021] An embodiment of the present invention provides a cable backplane device, comprising: at least one first circuit board and at least one second circuit board, wherein the first circuit board comprises a first board edge connector, a first chip, and a first intra-board connector; the second circuit board comprises a second board edge connector; the first board edge connector comprises a first board edge crimping connector and a first board edge straight-out connector; the first board edge connector and the second board edge connector are pluggable to enable the first circuit board and the second circuit board to be vertically plugged and interconnected; the first board edge crimping connector is electrically connected to the first chip through a printed circuit board PCB transmission line, the first board edge straight-out connector is electrically connected to the first intra-board connector through a flexible cable, and the first intra-board connector is electrically connected to the first chip.

[0022] In actual implementation, the specific method of electrically connecting the first intra-board connector to the first chip may be: the first intra-board connector is interconnected with the first circuit board through pins, and then electrically connected to the pins of the first chip through the PCB transmission lines in the board.

[0023] Figure 1 is a schematic diagram of the structure of a cable backplane device according to an embodiment of the present invention. Figure 1 As shown, the structural architecture of the cable backplane device is an orthogonal system architecture, which includes: a first circuit board 100 and a second circuit board 200, and the first circuit board and the second circuit board are arranged perpendicular to each other. The first circuit board 100 and the second circuit board 200 can be used as a pair of single boards vertically plugged in the above-mentioned backplane-free orthogonal system architecture.

[0024] like Figure 1As shown, the first circuit board includes at least the following devices: a first chip 110, a first board edge crimping connector 132, a first board edge straight-out connector 131, a first board-inside connector 120, a first PCB transmission line 101, and a first flexible cable bundle 121. The chip on each circuit board is electrically connected through a PCB transmission line or an in-board connector, a flexible cable, and a board edge connector, and the first and second circuit boards are plugged in through the board edge connector to achieve signal transmission between the chips on the two boards. The cable backplane system with the above structure, when performing high-speed signal transmission, uses cable transmission for some loss bottleneck channels, and the number of PCB transmission lines in the circuit board is reduced, which not only reduces link loss and improves signal transmission quality, but also reduces the circuit board material or reduces the size of the circuit board, thereby reducing system costs.

[0025] In actual implementation, the first circuit board 100 includes at least one first chip 110 , and the high-speed signal of the chip needs to be distributed and interconnected to the board edge connectors of the first circuit board 100 , including a first board edge crimp connector 132 and a first board edge direct-out connector 131 .

[0026] In the actual implementation process, the first board edge connector and the second board edge connector constitute a group of connectors, the first board edge connector may include a first board edge crimping connector 132 or a first board edge straight-out connector 131, the second board edge connector may include a second board edge crimping connector 232 or a second board edge straight-out connector 231, the first board edge connector and the second board edge connector are pluggable, and in the plugged state, the first board edge connector and the second board edge connector can be electrically connected, thereby realizing vertical plug-in interconnection of the first circuit board 100 and the second circuit board 200. The connection relationship between the board edge connectors of different circuit boards is not specifically limited.

[0027] In an exemplary embodiment, the first intra-board connector is fixedly mounted on the first circuit board by means of crimping or spring connection, and is electrically connected to the first circuit board.

[0028] In the actual implementation process, Figure 1 As shown, the first intra-board connector 120 can be installed on the first circuit board 100 by crimping or by screwing directly using a spring, so that the pins of the first intra-board connector 120 are directly connected to the pins on the first circuit board 100, thereby achieving electrical connection between the first intra-board connector 120 and the first circuit board 100. In the specific implementation process, the end of the first intra-board connector 120 electrically connected to the first circuit board 100 can be arranged close to the first chip 110, so that the intra-board wiring for interconnecting the pins of the first intra-board connector 120 and the first chip 110 can be greatly shortened, thereby improving the SI performance of the first circuit board 100.

[0029] In a specific embodiment, the first intra-board connector 120 and the first flexible cable bundle 121 on the first circuit board 100 can be placed on the front or back of the circuit board, or partially on the front and partially on the back. The flexible layout scheme can achieve better channel SI performance and cable management.

[0030] In an exemplary embodiment, the pins of the first board edge press-fit connector are press-fitted to the pins of the first circuit board, so that the first board edge press-fit connector is electrically connected to the first circuit board.

[0031] In the actual implementation process, the side of the first board edge crimping connector 132 that contacts the circuit board adopts a crimping method to realize a direct connection between the connector pin and the pin of the first circuit board 100, thereby realizing an electrical connection between the first board edge crimping connector 132 and the first circuit board 100, and then electrically connecting with the pin of the first chip 110 through the first PCB transmission line 101 in the first circuit board 100.

[0032] In an exemplary embodiment, the first board edge connector is fixedly connected to the first circuit board.

[0033] In actual implementation, the first board edge connector 131 can be fixed to the board edge of the first circuit board 100 by screws or other methods. Figure 1 As shown, the first flexible cable bundle 121 includes a plurality of flexible cables, and one end of the first flexible cable bundle 121 can be welded to the pin of the first board edge connector 131 to achieve electrical connection. The other end of the first flexible cable bundle 121 can be welded to the pin of the first in-board connector 120 to achieve electrical connection, thereby achieving electrical connection between the first board edge connector 131 and the first in-board connector 120.

[0034] In an exemplary embodiment, the cable backplane device further includes: a first tray for carrying and mounting a first circuit board, a first board edge connector, and a flexible cable, wherein the first board edge connector is fixedly mounted on the first tray.

[0035] Figure 2 is a schematic diagram of the positional relationship between the first tray and the first circuit board according to an embodiment of the present invention. Figure 2 As shown, the first board edge connector 131 can be fixed to the edge of the first tray 300, that is, not in contact with the first circuit board 100. The first tray 300 is a structural component that supports the first circuit board 100 and the first board edge connector 131, cables, etc.

[0036] In actual implementation, the first board edge connector can be directly fixedly connected to the first circuit board, or can be arranged outside the first circuit board, for example, on the first tray, and the first tray can also carry a flexible cable, thereby reducing the area of ​​the first circuit board. In addition, the first circuit board can also be installed on the first tray. In specific implementation, each first circuit board can correspond to a first tray to meet different application scenarios and functional requirements.

[0037] In a specific embodiment, the board edge connector can be fixed on the edge of the tray, not in contact with the circuit board, and electrically connected to the circuit board through a cable, so that the size of the circuit board can be reduced accordingly. This can not only reduce the size of the single board (circuit board) to save costs, but also solve the problem of some systems caused by the oversized single board.

[0038] In an exemplary embodiment, one end of the flexible cable is soldered to the pin of the first board edge connector, and the other end of the flexible cable is soldered to the pin of the first board intra-connector.

[0039] like Figure 1 As shown, the second circuit board includes at least the following components: a second chip 210, a second board edge crimping connector 232, a second board edge straight-out connector 231, a second in-board connector 220, a second PCB transmission line 201, and a second flexible cable harness 221. The second in-board connector 220 is electrically connected to the second circuit board 200.

[0040] In the actual implementation process, the end of the second on-board connector 220 electrically connected to the second circuit board 200 can be arranged close to the second chip 210, so that the on-board wiring interconnecting the pins of the second on-board connector 220 and the second chip 210 can be shortened to a large extent, thereby improving the SI performance of the second circuit board 200.

[0041] In a specific embodiment, the second intra-board connector 220 and the second cable harness 221 on the second circuit board 200 can be placed on the front or back of the circuit board, or partially on the front and partially on the back. The flexible layout scheme can achieve better channel SI performance and cable management.

[0042] In an exemplary embodiment, the second board edge connector includes a second board edge press-fit connector, and the second circuit board includes a second chip; the second board edge press-fit connector is electrically connected to the second chip via a PCB transmission line.

[0043] In actual implementation, the second board edge crimping connector 232 is electrically connected to the second circuit board 200 and to the second chip 210 .

[0044] In an exemplary embodiment, the second board edge connector also includes a second board edge direct-out connector, and the second circuit board also includes a second on-board connector; the second board edge direct-out connector is electrically connected to the second on-board connector through a flexible cable, and the second on-board connector is electrically connected to the second chip.

[0045] In actual implementation, the specific method of electrically connecting the second intra-board connector to the second chip may be: the second intra-board connector is interconnected with the second circuit board through pins, and then electrically connected to the pins of the second chip through the PCB transmission lines in the board.

[0046] In the actual implementation process, when the first circuit board includes a first board edge crimping connector and a first board edge straight-out connector, for the cable backplane device provided in an embodiment of the present invention, the second board edge connector of the second circuit board may include one of the second board edge crimping connector and the second board edge straight-out connector, or both.

[0047] In an exemplary embodiment, the pins of the second board edge crimp connector are crimped to the pins of the second circuit board, so that the second board edge crimp connector is electrically connected to the second circuit board. Figure 1 As shown, the second board edge connector 231 can be fixed to the board edge of the second circuit board 200. The second board edge connector 231 is electrically connected to the second intra-board connector 120 through the second flexible cable harness 221.

[0048] In an exemplary embodiment, the cable backplane device further includes: a second tray for supporting and installing a second circuit board, a second board edge connector, and a flexible cable, wherein the second board edge connector is fixedly mounted on the second tray.

[0049] Figure 3 is a schematic diagram of the positional relationship between the second tray and the second circuit board according to an embodiment of the present invention. Figure 3 As shown, the second board edge connector 231 can be fixed to the side of the second tray 400 without contacting the second circuit board 200. The second tray 400 is a structural component that supports the second circuit board 200 and the second board edge connector 231, cables, etc.

[0050] In the embodiment of the present invention, the number of the first circuit board 100 may be at least one, and the number of the second circuit board 200 may also be at least one. Figure 4 is a schematic diagram of one-to-many circuit board interconnection according to an embodiment of the present invention, Figure 5 Schematic diagram of many-to-many circuit board interconnection according to an embodiment of the present invention. The orthogonal system architecture of the embodiment of the present application is applicable to one-to-one circuit board interconnection, and is also applicable to Figure 4 The one-to-many board interconnect shown is also suitable for Figure 5Many-to-many board interconnections are shown.

[0051] In the above embodiments, whether it is a one-to-one circuit board interconnection, a one-to-many circuit board interconnection, or a many-to-many circuit board interconnection, the first circuit board 100 and the second circuit board 200 are vertically plugged in and interconnected, and the vertical plug-in interconnection between the first circuit board 100 and the second circuit board 200 is achieved through a connector.

[0052] In a specific embodiment, the first board edge crimp connector 132 can be plugged into the second board edge crimp connector 232 or the second board edge straight-out connector 231, and the first board edge straight-out connector 131 can also be plugged into the second board edge crimp connector 232 or the second board edge straight-out connector 231.

[0053] In a specific embodiment, the number of first board edge crimp connectors 132 and first board edge straight-out connectors 131 on the first circuit board 100 is not necessarily the same. Similarly, the number of second board edge crimp connectors 232 and second board edge straight-out connectors 231 on the second circuit board 200 is not necessarily the same.

[0054] In a specific embodiment, the first board edge crimping connector 132 and the first board edge straight-out connector 131 are used on the first circuit board 100, and the second circuit board 200 also uses two board edge connectors, namely, the second board edge crimping connector 232 and the second board edge straight-out connector 231. Alternatively, the first circuit board 100 uses two board edge connectors, namely, the first board edge crimping connector 132 and the first board edge straight-out connector 131, but the second circuit board 200 uses only one of the board edge connectors, namely, the second board edge crimping connector 232 or the second board edge straight-out connector 231. Alternatively, the second circuit board 200 uses two board edge connectors, namely, the second board edge crimping connector 232 and the second board edge straight-out connector 231, but the first circuit board 100 uses only one of the board edge connectors, namely, the first board edge crimping connector 132 or the first board edge straight-out connector 131. That is, a pair of orthogonally plugged single boards, such as the first circuit board 100 and the second circuit board 200, at least one of the circuit boards includes two types of board edge connectors, that is, the circuit board includes two types of channels, PCB and cable.

[0055] The cable backplane device provided in the embodiment of the present invention can also be applied to a traditional backplane architecture. Figure 6 is a schematic diagram of the position relationship of the cable backplane device in the backplane architecture according to an embodiment of the present invention, such as Figure 6As shown, the first circuit board 100 is connected with the backplane connector 020 on the middle backplane 010 through the board edge crimp connector 132 and the board edge direct connector 131 to realize vertical plugging and electrical connection between the first circuit board 100 and the middle backplane 010. Similarly, the second circuit board 200 is connected with the backplane connector 020 of the middle backplane 010 through the board edge connector to realize vertical plugging and electrical connection between the second circuit board 200 and the middle backplane 010. The signals on the first circuit board 100 and the second circuit board 200 are then interconnected through the PCB transmission line in the middle backplane 010. In the actual implementation process, there can be multiple first circuit boards 100 and second circuit boards 200, and at least one circuit board contains both crimping and direct cable board edge connectors, that is, the circuit board contains both PCB and cable channel types.

[0056] In the actual implementation process, in any possible backplane architecture, all applications in which only PCB transmission lines can be used inside the daughter card board (circuit board) or cables can be used for high-speed signal transmission, thereby reducing link loss and improving SI performance, or reducing the size of the board to meet system requirements, or reducing the board grade and saving system costs, etc., all fall within the scope of protection of the present invention.

[0057] In summary, the cable backplane device provided by the embodiment of the present invention, compared with the existing backplane system, has at least one single board that uses both a board edge crimping connector and a straight-out cable connector, that is, a portion of the high-speed signal is transmitted through the PCB transmission line inside the board, and a portion is transmitted through the cable. Since the cable loss is significantly better than the PCB transmission line, it can not only improve the high-speed channel SI performance and reduce the PCB channel loss pressure, but also reduce the board grade, reduce the single board size and even reduce the number of routing layers to reduce costs. And compared with the traditional cable backplane, the cable solution used by the cable backplane device of the present invention only exists inside each single board, and the number only covers part of the high-speed signals on the single board, so the cable management is relatively simple.

[0058] A cable backplane device provided in an embodiment of the present invention is adapted to communication system network equipment, such as routers, data center switches, etc., as a board-level interconnection architecture for realizing inter-board signal transmission. Network equipment usually includes a control unit, an interface processing unit, a switching / forwarding unit, etc. These units are connected through a service bus for communication, ensuring that the messages coming from the interface processing unit can be exchanged internally to other ports. In a specific implementation method, the interface processing unit can be set on the backplane, and then the interconnection between the various units can be realized through the backplane, that is, the backplane is used as a resource pool.

[0059] A cable backplane device provided by an embodiment of the present invention adopts an orthogonal system architecture without a backplane to realize vertical insertion of a first circuit board and a second circuit board. Compared with an orthogonal system architecture with a backplane, a set of inter-board connectors is reduced, the insertion loss of the system is reduced, and the signal loss of the wiring on the backplane is avoided, thereby improving the high-speed performance of the system. The first circuit board and the first board edge straight-out connector are electrically connected through the first in-board connector and the first flexible cable bundle. Compared with transmitting signals through the PCB transmission line on the single board, the high-speed performance of the cable is better, the signal loss is lower, and the number of PCB transmission lines in the circuit board is reduced. At the same time, the circuit board material or the size of the circuit board can be reduced, thereby reducing system costs.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cable backplane device, characterized in that: include: at least one first circuit board and at least one second circuit board, wherein: The first circuit board includes a first board edge connector, a first chip, and a first in-board connector; the second circuit board includes a second board edge connector; the first board edge connector includes a first board edge crimping connector and a first board edge straight-out connector; The first board edge connector and the second board edge connector are pluggable and connected, so that the first circuit board and the second circuit board are vertically plugged and interconnected; The first board edge crimping connector is electrically connected to the first chip through a printed circuit board PCB transmission line, the first board edge straight-out connector is electrically connected to the first on-board connector through a flexible cable, and the first on-board connector is electrically connected to the first chip.

2. The cable backplane device according to claim 1, characterized in that: The second board edge connector includes a second board edge crimp connector, and the second circuit board includes a second chip; The second board edge crimp connector is electrically connected to the second chip via a PCB transmission line.

3. The cable backplane device according to claim 2, characterized in that: The second board edge connector further includes a second board edge straight-out connector, and the second circuit board further includes a second in-board connector; The second board edge connector is electrically connected to the second in-board connector via a flexible cable, and the second in-board connector is electrically connected to the second chip.

4. The cable backplane device according to claim 1, characterized in that: The first intra-board connector is fixedly mounted on the first circuit board by means of crimping or spring connection, and is electrically connected to the first circuit board.

5. The cable backplane device according to claim 1, characterized in that: The pins of the first board edge crimping connector are crimped to the pins of the first circuit board, so that the first board edge crimping connector is electrically connected to the first circuit board.

6. The cable backplane device according to claim 1, characterized in that: The first board edge connector is fixedly connected to the first circuit board.

7. The cable backplane device according to claim 1, characterized in that: The cable backplane device also includes: The first tray is used to carry and install the first circuit board, the first board edge connector, and the flexible cable. The first board edge connector is fixedly installed on the first tray.

8. The cable backplane device according to claim 2, characterized in that: The pins of the second board edge crimping connector are crimped to the pins of the second circuit board, so that the second board edge crimping connector is electrically connected to the second circuit board.

9. The cable backplane device according to claim 3, characterized in that: The cable backplane device also includes: The second tray is used to carry and install the second circuit board, the second board edge connector, and the flexible cable. The second board edge connector is fixedly installed on the second tray.

10. The cable backplane device according to claim 1, characterized in that: One end of the flexible cable is welded to a pin of the first board edge connector, and the other end of the flexible cable is welded to a pin of the first board inner connector.

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