Switching power supply lightning protection structure

Abstract

The utility model discloses a switching power supply lightning protection structure in the field of power supply lightning protection, which comprises a lightning protection grounding seat and an insulating support, the lightning protection grounding seat is detachably connected with the insulating support, the lightning protection grounding seat is provided with a first connecting hole, and the insulating support is provided with a second connecting hole. The grounding connecting piece passes through the first connecting hole and the second connecting hole to be connected with the shell of the switching power supply; the lightning protection grounding seat comprises a first main body part, two opposite side walls of the first main body part respectively protrude outwards to form extension parts, and the bottoms of the first main body part and the extension parts are provided with welding pins welded with the circuit board. According to the utility model, the problems of small conductive area and insufficient through-current capability of the existing switch power supply lightning protection grounding device are solved, the lightning protection grounding seat adopts the concave structure and is connected with the circuit board through the three welding pins, and the contact area between the lightning protection grounding seat and the circuit board can be increased, so that the conductive area can be increased, and the service life of the lightning protection grounding seat is prolonged. And the through-current capability of the lightning protection grounding seat is improved.

Description

Technical Field

[0001] This utility model relates to the field of power supply surge protection technology, specifically to a surge protection structure for switching power supplies. Background Technology

[0002] Lightning protection grounding devices for switching power supplies are important systems used to protect switching power supply equipment from lightning strikes and electromagnetic interference. Some switching power supplies need to be equipped with lightning protection facilities to avoid the danger of lightning strikes and ensure electrical safety.

[0003] Chinese patent application CN202021884556.9 discloses a grounding device for high lightning protection of a switching power supply. The device has a circuit board inside a metal casing. The circuit board includes a lightning protection circuit, connectors, insulators, and metal fasteners. The connectors are cylindrical and installed in a first through-hole on the circuit board, with tin material on their radial sides for conductive connection to the lightning protection circuit. However, because the connectors are conductively connected to the lightning protection circuit via the tin material on the side of the cylindrical body, this contact method results in a small conductive area, limiting current flow. Under high current requirements, the connectors are insufficient to withstand large currents, leading to insufficient current carrying capacity.

[0004] The above-mentioned defects urgently need to be addressed. Utility Model Content

[0005] To address the issues of small conductive area and insufficient current-carrying capacity in existing lightning protection grounding devices for switching power supplies, this utility model provides a lightning protection structure for switching power supplies.

[0006] The technical solution of this utility model is as follows:

[0007] A surge protection structure for a switching power supply includes a surge protection grounding base and an insulating support. The surge protection grounding base and the insulating support are detachably connected. The surge protection grounding base is provided with a first connection hole, and the insulating support is provided with a second connection hole. A grounding connector passes through the first connection hole and the second connection hole and connects to the outer casing of the switching power supply.

[0008] The lightning protection grounding base includes a first main body, with two opposite side walls of the first main body extending outward to form extensions, and the bottom of both the first main body and the extensions are provided with solder feet for welding to a circuit board.

[0009] According to the above-described scheme of this utility model, the lightning protection grounding base is provided with a snap-fit ​​groove, and the insulating bracket is provided with a corresponding snap-fit ​​part, and the snap-fit ​​part is snapped into the snap-fit ​​groove.

[0010] According to the present utility model of the above-described scheme, the first main body includes a base plate and side plates disposed on opposite sides of the base plate, the first connecting hole is disposed on the base plate, the snap-fit ​​groove is disposed on the side plate, and the extension is disposed on the side of the side plate away from the side plate.

[0011] According to the above-described scheme of this utility model, the portion of the base plate located in the snap-fit ​​groove protrudes outward to form a first snap, and the snap-fit ​​portion of the insulating bracket is securely connected to the first snap.

[0012] According to the above-described scheme of this utility model, the width of the first buckle is smaller than the width of the snap-fit ​​groove.

[0013] According to the above-described scheme of this utility model, the insulating bracket includes a second main body, and the two opposite sides of the second main body protrude outward to form the snap-fit ​​portion.

[0014] According to the present invention based on the above solution, the snap-fit ​​portion includes a base and a second snap fastener disposed on the top of the base, the second connecting hole is disposed on the base, and the second snap fastener is securely connected to the first snap fastener.

[0015] According to the present invention with the above-described solution, the width of the second buckle is greater than the width of the base, so that an abutting surface is formed between the second buckle and the base.

[0016] According to the present invention based on the above scheme, a guide slope is provided on the side of the second buckle near the second connecting hole.

[0017] According to the present invention based on the above scheme, a reinforcing part is provided on the side of the first connecting hole near the extension.

[0018] The advantages of this utility model based on the above solution are as follows:

[0019] In the aforementioned surge protection structure for switching power supplies, the surge protection grounding base includes a first main body. The two opposite side walls of the first main body extend outward to form extensions. Both the bottom of the first main body and the extensions are provided with solder feet for welding to the circuit board. That is, the surge protection grounding base adopts a U-shaped structure and is connected to the circuit board through three solder feet. This not only improves the stability of the connection between the surge protection grounding base and the circuit board, but also increases the contact area between the surge protection grounding base and the circuit board, thereby increasing the conductive area and improving the current carrying capacity of the surge protection grounding base. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is an exploded view of the present invention;

[0022] Figure 3 One of the schematic diagrams of a lightning protection grounding structure;

[0023] Figure 4 The second schematic diagram of the lightning protection grounding structure;

[0024] Figure 5 The third schematic diagram of the lightning protection grounding structure;

[0025] Figure 6 This is one of the structural schematic diagrams of an insulating support;

[0026] Figure 7 This is the second schematic diagram of the insulating support structure;

[0027] Figure 8 This is a schematic diagram of a switching power supply.

[0028] Figure 9 This is a schematic diagram illustrating the application of this utility model in a switching power supply;

[0029] Figure 10 for Figure 9 Enlarged view of part A in the middle.

[0030] In the figure, 1. Lightning protection grounding base; 11. First connecting hole; 12. Reinforcing part; 13. First main body part; 131. Base plate; 132. Side plate; 133. First buckle; 14. Extension part; 15. Snap-fit ​​groove; 16. Weld foot; 2. Insulating bracket; 21. Second connecting hole; 22. Snap-fit ​​part; 221. Base part; 222. Second buckle; 223. Guide slope; 23. Second main body part; 3. Grounding connector; 4. Outer shell; 5. Top cover; 6. Base plate; 7. Circuit board; 8. Input socket; 9. Output socket; 10. Discharge tube. Detailed Implementation

[0031] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0032] like Figure 1 , Figure 2As shown, this utility model provides a lightning protection structure for a switching power supply, including a lightning protection grounding base 1 and an insulating support 2. The lightning protection grounding base 1 and the insulating support 2 are detachably connected. The lightning protection grounding base 1 is provided with a first connecting hole 11, and the insulating support 2 is provided with a second connecting hole 21. A grounding connector 3 passes through the first connecting hole 11 and the second connecting hole 21 and connects to the outer casing 4 of the switching power supply. Specifically, the first connecting hole 11 and the second connecting hole 21 are coaxially arranged, and there are two of each. The lightning protection grounding base 1 is installed on the outer casing 4 of the switching power supply through two grounding connectors 3, that is, the lightning protection grounding base 1 adopts a double-hole installation, which increases the conductive contact area of ​​the lightning protection grounding base 1. The lightning protection grounding base 1 and the outer casing 4 of the switching power supply are mutually conductive, and the outer casing 4 of the switching power supply is at the same potential as the ground, thereby dissipating the incoming lightning voltage to the ground, thus achieving the lightning protection function for the switching power supply. In addition, the insulating bracket 2 is installed between the lightning protection grounding seat 1 and the outer casing 4 of the switching power supply. The insulating bracket 2 supports the lightning protection grounding seat 1 and plays an insulating role, ensuring electrical isolation of the switching power supply when it is subjected to withstand voltage test. It can also effectively prevent current from passing through unexpected paths and causing damage to the switching power supply in extreme situations such as lightning strikes, thereby ensuring the safe and stable operation of the switching power supply.

[0033] like Figure 3 , Figure 4 As shown, in this embodiment, a reinforcing part 12 is provided on the side of the first connecting hole 11 near the extension 14. The reinforcing part 12 can increase the strength of the first connecting hole 11 and prevent connection failure. In addition, the reinforcement part 12 can disperse stress to a certain extent, so that the material around the screw hole can bear the compressive force more evenly, thereby improving the durability of the entire connection structure.

[0034] like Figure 3 , Figure 4 As shown, in this embodiment, the lightning protection grounding base 1 includes a first main body 13. The two opposite side walls of the first main body 13 extend outward to form extensions 14. The bottom of both the first main body 13 and the extensions 14 are provided with solder feet 16 for welding to the circuit board 7. That is, the lightning protection grounding base 1 adopts a U-shaped structure and is connected to the circuit board 7 through three solder feet 16. This not only improves the stability of the connection between the lightning protection grounding base 1 and the circuit board 7, but also increases the contact area between the lightning protection grounding base 1 and the circuit board 7, thereby increasing the conductive area and improving the current carrying capacity of the lightning protection grounding base 1.

[0035] like Figure 2 , Figure 3 , Figure 4As shown, in this embodiment, the lightning protection grounding base 1 is provided with a snap-fit ​​groove 15, and the insulating bracket 2 is correspondingly provided with a snap-fit ​​part 22. The snap-fit ​​part 22 is snapped into the snap-fit ​​groove 15, thereby realizing a detachable connection between the lightning protection grounding base 1 and the insulating bracket 2. This allows for installation without the need for additional fasteners or tools; simply insert the corresponding snap-fit ​​part 22 on the insulating bracket 2 into the snap-fit ​​groove 15 of the lightning protection grounding base 1 to achieve a secure connection. This simplifies the installation process and improves installation efficiency. Specifically, the first main body 13 includes a base plate 6 and two side plates 132, which are respectively provided on opposite sides of the base plate 6. A first connecting hole 11 is provided on the base plate 6, and the snap-fit ​​groove 15 is provided on the side plate 132, allowing the snap-fit ​​part 22 of the insulating bracket 2 to easily engage with it, achieving a stable connection between the two. Meanwhile, the extension 14 is located on the side of the side plate 132 away from the side plate 132, thereby making the lightning protection grounding seat 1 form a "U" shaped structure. The design of the extension 14 increases the contact area between the lightning protection grounding seat 1 and the circuit board 7, and enhances the stability and conductivity of the lightning protection grounding seat 1.

[0036] like Figures 2 to 5 As shown, in this embodiment, the portion of the base plate 6 of the first main body 13 located in the snap-fit ​​groove 15 protrudes outward to form a first snap 133. The snap-fit ​​portion 22 of the insulating bracket 2 is securely connected to the first snap 133. The first snap 133 enhances the structural strength of the snap-fit ​​groove 15 and provides a more reliable locking point for the snap-fit ​​portion 22 of the insulating bracket 2. When the snap-fit ​​portion 22 of the insulating bracket 2 is inserted into the snap-fit ​​groove 15, the snap-fit ​​portion 22 and the first snap 133 fit tightly together to form a stable locking connection. This not only ensures the connection stability between the lightning protection grounding seat 1 and the insulating bracket 2 but also greatly simplifies the installation process and improves installation efficiency. In addition, the width D1 of the first snap 133 is smaller than the groove width D2 of the snap-fit ​​groove 15, ensuring that when the snap-fit ​​portion 22 of the insulating bracket 2 is inserted into the snap-fit ​​groove 15, there is enough space for fine-tuning until the optimal locking position is achieved. Meanwhile, the smaller buckle width also avoids material deformation or damage caused by excessive squeezing during installation, thereby extending the service life of the lightning protection grounding seat 1 and the insulating bracket 2.

[0037] like Figure 2 , Figure 6 , Figure 7As shown, in this embodiment, the insulating bracket 2 includes a second main body 23. The two opposite sides of the second main body 23 protrude outwards to form snap-fit ​​portions 22, providing a more reliable locking point for the connection between the insulating bracket 2 and the lightning protection grounding base 1. Furthermore, the snap-fit ​​portion 22 includes a base 221 and a second latch 222 disposed on the top of the base 221. A second connecting hole 21 is disposed on the base 221. When the insulating bracket 2 is installed onto the lightning protection grounding base 1, the second latch 222 and the first latch 133 are locked together, forming a stable locking connection. This improves the connection stability between the insulating bracket 2 and the lightning protection grounding base 1, greatly simplifies the installation process, and increases installation efficiency.

[0038] like Figure 2 , Figure 6 , Figure 7 As shown, in this embodiment, the width D3 of the second latch 222 is greater than the width D4 of the base 221, so that the second latch 222 and the base 221 form an abutment surface, which enhances the structural strength of the latching part 22 and provides more reliable support for the connection between the latching part 22 and the lightning protection grounding seat 1. When the insulating bracket 2 is installed on the lightning protection grounding seat 1, the second latch 222 will naturally open outward because its width is greater than that of the base 221, until it comes into close contact with and is locked with the first latch 133 on the lightning protection grounding seat 1, ensuring the stability of the connection and making the installation process smoother, reducing the risk of damage caused by improper operation. In addition, a guide slope 223 is provided on the side of the second latch 222 near the second connecting hole 21, so that when the insulating bracket 2 is installed, the latching part 22 can be more easily inserted into the latching groove 15 of the lightning protection grounding seat 1. When the locking part 22 slides along the guide slope 223, the second buckle 222 of the locking part 22 will gradually contact and lock with the first buckle 133, thereby achieving a stable connection between the two.

[0039] like Figure 8 , Figure 9 As shown, in this embodiment, the switching power supply includes a housing 4, a top cover 5, a base plate 6, a circuit board 7, an input socket 8, and an output socket 9. The input socket 8 is soldered onto the circuit board 7. The top cover 5 is fixed to the housing 4 with screws. The housing 4 is fixed to the base plate 6 with screws. The circuit board 7 is fixed to the base plate 6 with screws. The lightning protection grounding base 1 is soldered onto the circuit board 7. The snap-fit ​​part 22 of the insulating bracket 2 is snapped into the snap-fit ​​groove 15 of the lightning protection grounding base 1. The lightning protection grounding base 1 is fixed to the housing 4 by grounding screws passing through the housing 4 and the insulating bracket 2. The output socket 9 is for customer wiring.

[0040] like Figure 9 , Figure 10As shown, in use, a discharge tube 10 is installed next to the lightning protection grounding base 1. The lightning voltage flows into the circuit board 7 through the input socket 8. Since the circuit board 7 is equipped with a lightning protection circuit, when the lightning voltage exceeds a certain value, the lightning protection circuit is activated, the discharge tube 10 works, and the voltage flows into the lightning protection grounding base 1 through the circuit board 7. The lightning protection grounding base 1 is fixed to the outer shell 4 of the switching power supply by two grounding screws. The lightning protection grounding base 1 and the outer shell 4 are interconnected, and the switching power supply is at the same potential as the ground, thus discharging the lightning voltage to the ground and achieving the effect of lightning protection.

[0041] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

[0042] The present utility model patent has been described above with reference to the accompanying drawings. Obviously, the implementation of the present utility model patent is not limited to the above-described manner. Any improvements made by adopting the inventive concept and technical solution of the present utility model patent, or the direct application of the inventive concept and technical solution of the present utility model patent to other occasions without modification, are all within the protection scope of the present utility model.

Claims

1. A surge protection structure for a switching power supply, characterized in that, It includes a lightning protection grounding base and an insulating support. The lightning protection grounding base and the insulating support are detachably connected. The lightning protection grounding base is provided with a first connection hole, and the insulating support is provided with a second connection hole. The grounding connector passes through the first connection hole and the second connection hole and connects to the outer shell of the switching power supply. The lightning protection grounding base includes a first main body, with two opposite side walls of the first main body extending outward to form extensions, and the bottom of both the first main body and the extensions are provided with solder feet for welding to a circuit board.

2. The surge protection structure for switching power supplies according to claim 1, characterized in that, The lightning protection grounding base is provided with a snap-fit ​​groove, and the insulating bracket is provided with a corresponding snap-fit ​​part, which is snapped into the snap-fit ​​groove.

3. The surge protection structure for switching power supplies according to claim 2, characterized in that, The first main body includes a base plate and side plates disposed on opposite sides of the base plate. The first connecting hole is disposed on the base plate, the snap-fit ​​groove is disposed on the side plate, and the extension is disposed on the side of the side plate away from the side plate.

4. The surge protection structure for switching power supplies according to claim 3, characterized in that, The portion of the base plate located in the snap-fit ​​groove protrudes outward to form a first snap, and the snap-fit ​​portion of the insulating bracket is securely connected to the first snap.

5. The surge protection structure for a switching power supply according to claim 4, characterized in that, The width of the first buckle is smaller than the width of the snap-fit ​​groove.

6. The surge protection structure for a switching power supply according to claim 4, characterized in that, The insulating bracket includes a second main body, and the two opposite sides of the second main body protrude outward to form the snap-fit ​​portion.

7. The surge protection structure for a switching power supply according to claim 6, characterized in that, The snap-fit ​​portion includes a base and a second snap fastener disposed on the top of the base. The second connecting hole is disposed on the base, and the second snap fastener is securely connected to the first snap fastener.

8. The surge protection structure for a switching power supply according to claim 7, characterized in that, The width of the second buckle is greater than the width of the base, so that an abutting surface is formed between the second buckle and the base.

9. The surge protection structure for a switching power supply according to claim 7, characterized in that, The second buckle has a guide slope on the side near the second connecting hole.

10. The surge protection structure for a switching power supply according to claim 1, characterized in that, A reinforcing part is provided on the side of the first connecting hole near the extension.

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