RJ45 electrical port surge protection structure and RJ45 electrical port module

Abstract

The utility model relates to the technical field of RJ45 electrical ports, in particular to an RJ45 electrical port surge protection structure and an RJ45 electrical port module, which comprise a structured shell, a circuit board, an RJ45 connector, a network transformer and a PHY chip, the RJ45 connector, the network transformer and the PHY chip are arranged on the circuit board, and the network transformer is connected between the RJ45 connector and the PHY chip; physical isolation areas are arranged between the secondary ground and the primary ground, the positions of the physical isolation areas on all wiring layers of the circuit board are consistent, and a center tap of a primary coil of the network transformer connects a high-voltage capacitor to the primary ground. And the primary ground is connected to the ground through the structured shell and an equipment port connected with the structured shell by an electroplating area with windows on two sides on the circuit board. According to the utility model, the formed discharge path can ensure that the impact surge from the network cable is rapidly, stably and safely discharged to the ground, thereby ensuring that the circuit board is effectively protected, and preventing the normal communication of the system from being influenced by the failure of the electric port module.

Description

Technical Field

[0001] This utility model relates to the field of RJ45 electrical port technology, and more specifically, to an RJ45 electrical port surge protection structure and an RJ45 electrical port module. Background Technology

[0002] With the rapid development of internet technology, higher demands have been placed on data transmission bandwidth and stability. Electrical interface modules, due to their ability to provide high-speed, stable network connections and their high reliability, ease of use, high bandwidth transmission capabilities, and low power consumption, are widely used in scenarios such as the construction of data center server and storage networks, enterprise network information exchange, and business transmission.

[0003] See Figure 1 As shown, the existing Ethernet port module mainly consists of a PHY chip, a network transformer, an RJ45 connector, and a structural housing. The PHY chip is used to convert the high-speed Ethernet signal of the switching equipment to the network signal of the network port. Since the potentials of the devices at both ends of the network cable connection are not equal, and the network cable may be affected by external lightning strikes, static electricity, etc., an AC network transformer is added between the PHY chip and the RJ45 connector for isolation and protection. The structural housing is used to adapt and convert the SFP / SFP+ / SFP28 port of the switching equipment to the transmission network cable interface.

[0004] As the amount of data transmitted over the network continues to increase, the requirements for the reliability of signal transmission are becoming increasingly stringent. Interference such as lightning strikes and static electricity can further exacerbate the impact of signal transmission errors. Therefore, the current demand for surge protection capabilities of electrical port modules is also increasing.

[0005] Existing surge protection methods for electrical port modules mainly fall into two categories: The first involves adding a flexible metal spring between the structural component housing and the primary ground network of the circuit board. However, because it's difficult to establish a stable and reliable contact between the flexible metal spring and the circuit board and structural component housing, its surge protection capability is weak. The second method involves creating an open-window electroplating design in the support point area where the circuit board contacts the structural component housing. However, because the support point area is small, the surge path formed by the contact with the structural component housing is narrow, resulting in weak surge protection capability. Both of these surge protection methods lead to a large accumulation of surge energy in the primary ground network. Existing electrical port modules fail to provide effective physical isolation between the primary and secondary grounds, causing them to intertwine between different wiring layers. This generally results in weak protection against surges from the transmission network cable, and in severe cases, breakdown discharge may occur, damaging the PHY chip in the secondary network and seriously affecting system communication.

[0006] Therefore, how to further improve the surge protection capability of the electrical port module is a technical problem that urgently needs to be solved. Utility Model Content

[0007] The purpose of this utility model is to provide an RJ45 electrical port surge protection structure and an RJ45 electrical port module. By physically isolating the primary ground and secondary ground, and by ensuring that the primary ground is in close contact with the structured shell of the electrical port module through the electroplated area with double-sided windows on the circuit board, and that the structured shell is connected to the cage of the device port and finally connected to the ground, the resulting discharge path can ensure that the surge from the network cable can be discharged to the ground quickly, stably and safely, thereby solving the technical problem of how to further improve the surge protection capability of the electrical port module.

[0008] This utility model is achieved through the following technical solution: an RJ45 electrical port surge protection structure, including a structured shell, a circuit board, and an RJ45 connector, a network transformer, and a PHY chip on the circuit board, wherein the network transformer is connected between the RJ45 connector and the PHY chip;

[0009] A physical isolation area is provided between the secondary ground and the primary ground of the network transformer. The physical isolation area is located in the same position on all wiring layers of the circuit board. The center tap of the primary coil of the network transformer is connected to the primary ground via a high-voltage capacitor. The primary ground is connected to the earth through the electroplated area with double-sided windows on the circuit board, through the structured shell, and through the device port cage connected to the structured shell.

[0010] According to a preferred embodiment, the width of the physical isolation region is greater than or equal to 0.5 mm.

[0011] According to a preferred embodiment, the physically isolated regions are distributed in a "Z" shape.

[0012] According to a preferred embodiment, the high-voltage capacitor is arranged adjacent to the electroplated through-hole.

[0013] According to a preferred embodiment, each center tap of the primary coil of the network transformer is connected in series with a resistor.

[0014] According to a preferred embodiment, the structured housing includes a structural component top cover, a structural component base, and a conductive mask. The structural component top cover is fitted onto the structural component base, the circuit board is disposed between the structural component top cover and the structural component base, and the conductive mask covers the outside of the structural component top cover and the structural component base and is connected to the device port cage.

[0015] According to a preferred embodiment, a boss is provided on the inner side of the top cover of the structural component, and the electroplated area of ​​the top window of the circuit board corresponds to the position of the boss.

[0016] According to a preferred embodiment, a flexible conductive layer is provided between the electroplated area of ​​the top window of the circuit board and the boss.

[0017] According to a preferred embodiment, the bottom windowed electroplating area of ​​the circuit board corresponds to the position of the support area inside the structural component base.

[0018] This utility model also provides an RJ45 electrical port module, including the RJ45 electrical port surge protection structure as described above.

[0019] The technical solution of the RJ45 electrical port surge protection structure and RJ45 electrical port module provided by this utility model has at least the following advantages and beneficial effects: (1) This utility model forms a stable, reliable and smooth surge impact discharge path by completely isolating the primary ground and the secondary ground, grounding the primary ground through the electroplated area with double-sided opening on the circuit board, and combining the plane conductive voltage of the upper cover boss of the structural component. The discharge path formed can ensure that the surge from the network cable can be discharged to the ground quickly, stably and safely, thereby ensuring that the circuit board is effectively protected and avoiding the failure of the electrical port module, which would affect the normal communication of the system; (2) By completely isolating the primary ground and the secondary ground, the interference of the surge impact on the secondary network signal on the primary network is completely avoided. Attached Figure Description

[0020] Figure 1 Functional block diagram of existing electrical port modules in the background technology;

[0021] Figure 2 This is a schematic diagram of the surge impact discharge path provided in Embodiment 1 of this utility model;

[0022] Figure 3 A schematic diagram of the physical isolation zone between the primary ground and the secondary ground provided in Embodiment 1 of this utility model;

[0023] Figure 4 This is a schematic diagram of the top-layer windowed electroplating of the circuit board provided in Embodiment 1 of this utility model;

[0024] Figure 5 This is a schematic diagram of the bottom layer windowed electroplating of the circuit board provided in Embodiment 1 of this utility model;

[0025] Figure 6 This is a schematic diagram of the planar boss structure of the structural component cover provided in Embodiment 1 of this utility model;

[0026] Figure 7 This is a schematic diagram of the pressing of the upper cover of the structural component provided in Embodiment 1 of this utility model;

[0027] Figure 8 This is a schematic diagram of the electrical port module assembly provided in Embodiment 1 of this utility model;

[0028] Reference numerals: 1-Circuit board, 2-Structural component top cover, 3-Structural component base, 4-Conductive mask, 5-Boss, 6-Flexible conductive layer, 7-Base support area, 8-Opening electroplating area, 9-Structural component shell, 10-Exchange equipment. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Example 1

[0031] This embodiment provides an RJ45 electrical port surge protection structure, which includes a structural housing 9, a circuit board 1, and an RJ45 connector, a network transformer, and a PHY chip on the circuit board 1. The network transformer is connected between the RJ45 connector and the PHY chip.

[0032] In this embodiment, while achieving electrical signal isolation between the RJ45 connector and the PHY chip through the network transformer, a physical isolation area is provided between the secondary ground and the primary ground of the network transformer, thereby achieving complete physical isolation between the primary ground and the secondary ground.

[0033] Specifically, in this embodiment, as shown in Figure 2, the signal lines and center tap RC discharge circuit on the primary coil side of the network transformer are located near the RJ45 connector, and each center tap of the primary coil of the network transformer is connected in series with a resistor; the center tap of the primary coil of the network transformer is connected to the high-voltage capacitor to the primary ground. To minimize the path from the center tap to the high-voltage capacitor, the high-voltage capacitor in this embodiment is placed near the plated via; the gold fingers and PHY chip circuits are located on the secondary side of the network transformer, using the secondary ground; see... Figure 3 As shown, the primary ground and the secondary ground are isolated by a physical isolation zone distributed in a "Z" shape, and the width of the physical isolation zone is greater than or equal to 0.5 mm.

[0034] It should be noted that the surge impact from the transmission network cable is first transmitted to the primary coil through the RJ45 connector, and then flows out through the four center taps of the primary coil. After being attenuated by the resistor, the surge impact flows to the high-voltage capacitor, and then is discharged to the primary ground through the high-voltage capacitor.

[0035] Furthermore, in this embodiment, the physical isolation area is located at the same position on all wiring layers of the circuit board 1, and there is no spatial intersection between any signals of the primary network and the secondary network. This non-interleaving design of the primary ground and the secondary ground greatly reduces the mutual interference between the primary network and the secondary network.

[0036] To ensure that surge currents from the network cable can be discharged to the ground quickly, efficiently and safely, this embodiment uses a method where the primary ground is in close contact with the structural housing 9 to discharge the surge current to the structural housing 9. Then, the surge current is discharged to the rat cage at the port of the switching equipment 10 through the structural housing 9. Finally, the surge current is discharged to the ground through the grounding wire connected to the rat cage at the port of the switching equipment 10.

[0037] See Figure 8 As shown, the structural component housing 9 consists of a structural component top cover 2, a structural component base 3, and a conductive shield 4. The conductive shield 4 adopts a multi-tooth spring integrated design, which can make multiple points of close contact with the rat cage of the switching equipment 10 port, ensuring that the surge on the network cable can be discharged quickly and safely. The structural component top cover 2 covers the structural component base 3, the circuit board 1 is set between the structural component top cover 2 and the structural component base 3, and the conductive shield 4 covers the outside of the structural component top cover 2 and the structural component base 3.

[0038] See Figures 4 to 8 As shown, the double-sided windowed electroplated area on the primary ground circuit board 1 is in close contact with the structural component housing 9. A boss 5 is provided on the inner side of the structural component cover 2, and the top electroplated through-hole of the circuit board 1 corresponds to the boss 5. A flexible conductive layer 6 is provided between the top electroplated through-hole of the circuit board 1 and the boss 5. The boss 5 is tightly pressed against the top windowed electroplated area of ​​the circuit board 1. Specifically, in this embodiment, the top windowed electroplated area of ​​the circuit board 1 adopts a large-area integrated windowed electroplating design, which can provide good and stable contact conditions between the primary ground and the structural component cover 2 to the greatest extent, forming the main discharge circuit for surge impact. By providing a flexible conductive layer 6 between the electroplated area on the top of the circuit board 1 and the boss 5, the contact area between the boss 5 and the primary ground can be maximized and the contact most stable, maximizing the discharge of surge impacts from the network cable to the structural component housing 9, and maximizing the protection of the internal circuitry of the electrical port module.

[0039] Furthermore, the electroplated area with the window on the bottom layer of the circuit board 1 corresponds to the position of the base support area 7 on the inner side of the structural component base 3. Specifically, in this embodiment, the bottom layer of the circuit board 1 and the two base support areas 7 of the structural component base 3 are designed with window electroplating. These two support areas not only support the circuit board 1, but also form a stable surge impact supplementary discharge circuit with the structural component shell 9. By cooperating with the main discharge circuit, a stable, reliable and smooth surge impact discharge path can be formed.

[0040] In summary, this utility model, through the complete physical isolation of the primary ground and secondary ground, the design of the electroplated area with double-sided windows on the circuit board 1 for the primary ground, and the design of the planar conductive voltage of the boss 5 on the upper cover 2 of the structural component, forms a stable, reliable, and unobstructed surge discharge path. The discharge path can ensure that the surge from the network cable can be discharged to the ground quickly, stably, and safely, thereby ensuring that the circuit board 1 is effectively protected and avoiding failure of the electrical port module, which would affect the normal communication of the system.

[0041] Example 2

[0042] Based on the technical solution provided in the embodiments, this embodiment provides an RJ45 electrical port module, which includes the RJ45 electrical port surge protection structure as described in Embodiment 1.

[0043] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A surge protection structure for an RJ45 electrical port, characterized in that, Includes a structured housing, a circuit board (1), and an RJ45 connector, a network transformer, and a PHY chip on the circuit board (1), wherein the network transformer is connected between the RJ45 connector and the PHY chip; The secondary ground and primary ground of the network transformer are provided with a physical isolation area. The physical isolation area is located in the same position on all wiring layers of the circuit board (1). The center tap of the primary coil of the network transformer is connected to the primary ground via a high-voltage capacitor. The primary ground is connected to the earth through the electroplated area with double-sided windows on the circuit board (1), through the structured shell and the device port cage connected to the structured shell.

2. The RJ45 electrical port surge protection structure as described in claim 1, characterized in that, The width of the physical isolation area is greater than or equal to 0.5 mm.

3. The RJ45 electrical port surge protection structure as described in claim 1, characterized in that, The physically isolated areas are distributed in a "Z" shape.

4. The RJ45 power port surge protection structure as described in claim 1, characterized in that, The high-voltage capacitor is located near the electroplating through-hole.

5. The RJ45 electrical port surge protection structure as described in claim 1, characterized in that, Each center tap of the primary coil of the network transformer is connected in series with a resistor.

6. The RJ45 electrical port surge protection structure as described in any one of claims 1 to 5, characterized in that, The structured housing includes a structural component top cover (2), a structural component base (3), and a conductive mask (4). The structural component top cover (2) covers the structural component base (3), the circuit board (1) is disposed between the structural component top cover (2) and the structural component base (3), and the conductive mask (4) covers the outside of the structural component top cover (2) and the structural component base (3) and is connected to the device port cage.

7. The RJ45 electrical port surge protection structure as described in claim 6, characterized in that, The inner side of the upper cover (2) of the structural component is provided with a boss (5), and the electroplating area of ​​the top window of the circuit board (1) corresponds to the position of the boss (5).

8. The RJ45 electrical port surge protection structure as described in claim 7, characterized in that, A flexible conductive layer (6) is provided between the electroplated area of ​​the top window of the circuit board (1) and the boss (5).

9. The RJ45 electrical port surge protection structure as described in claim 6, characterized in that, The area of ​​the bottom window electroplating of the circuit board (1) corresponds to the position of the support area inside the structural component base (3).

10. An RJ45 electrical port module, characterized in that, Including the RJ45 electrical port surge protection structure as described in any one of claims 1 to 9.

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