Switching power supply ground connection structure, switching power supply and lighting device

Abstract

The application discloses a switching power supply ground connection structure, a switching power supply and a lighting device. The switching power supply ground connection structure comprises a connecting shell part, a circuit board assembly and at least one connecting piece. The connecting shell part has a receiving cavity. The connecting shell part comprises a connecting bottom wall which is part of the cavity wall of the receiving cavity. The connecting bottom wall has at least one connecting through hole which communicates the receiving cavity with the external space of the connecting shell part. The circuit board assembly is located in the receiving cavity. The connecting piece is arranged in the connecting through hole and connected to the circuit board assembly and the connecting bottom wall. The connecting piece can electrically connect the circuit board assembly and the connecting shell part. In the application, the virtual connection defect caused by insufficient riveting strength of the wire, the connecting piece and / or the connecting shell part is avoided, the rework rate is reduced, the material cost and the processing steps are saved, the connecting shell part in the switching power supply can realize stable grounding, and the electrical performance and the mechanical reliability of the switching power supply are comprehensively improved.

Description

Technical Field

[0001] This application relates to the field of switching power supply technology, and in particular to a switching power supply grounding connection structure, a switching power supply, and a lighting device. Background Technology

[0002] In fields such as infrastructure and special equipment, power supply equipment is facing higher market demand. However, traditional power supply equipment still faces some problems during use, which affect its normal operation.

[0003] In traditional power supply equipment, riveting is used when wiring the power supply structure to achieve electrical connection between the power supply equipment casing and the ground wire through electrical wires. However, since riveting requires regular maintenance, if the riveting strength decreases, it will affect the stability of the electrical connection between the power supply equipment casing and the ground wire, thereby affecting the normal operation of the power supply structure. Utility Model Content

[0004] In view of this, and in response to the above-mentioned technical problems, this application provides a switching power supply grounding connection structure, a switching power supply, and a lighting device, wherein the switching power supply uses the switching power supply grounding connection structure, and the lighting device uses the switching power supply.

[0005] A first aspect of this application provides a grounding connection structure for a switching power supply. The grounding connection structure includes a connecting housing, a circuit board assembly, and at least one connector. The connecting housing has a receiving cavity and includes a connecting bottom wall, which is part of the cavity wall. The connecting bottom wall has at least one connecting through-hole, which communicates between the receiving cavity and the external space of the connecting housing. The circuit board assembly is located within the receiving cavity. The connector passes through the connecting through-hole and is connected to the circuit board assembly and the connecting bottom wall. The connector enables electrical connection between the circuit board assembly and the connecting housing.

[0006] In the switching power supply of this application, the switching power supply also includes an input ground wire, which is used to electrically connect the circuit board assembly so that the circuit board assembly can be grounded. However, based on safety considerations for the switching power supply, the connection shell in the switching power supply also needs to be grounded. In the aforementioned embodiment, since the connector can stably connect the circuit board assembly to the connection shell in the switching assembly, a stable electrical connection can be maintained between the circuit board assembly and the connection shell. Therefore, as long as the input ground wire is connected to the circuit board assembly, due to the electrical connection between the circuit board assembly and the connection shell, the input ground wire and the connection shell are also electrically connected. Furthermore, based on the connector's hard connection between the bottom wall of the connection shell and the circuit board assembly, there is a connection between the bottom wall and the circuit board assembly. The high-strength hard connection means that a stable electrical connection is achieved between the circuit board assembly and the bottom wall of the connection through a stable connection relationship. The method of hard-connecting the connector to the connecting shell replaces the existing method of using riveted wires to electrically connect the connector and the connecting shell. This avoids the defects of incomplete connection caused by insufficient riveting strength between the wire and the connector and / or the connecting shell, reduces rework rate, saves material costs and processing steps, and enables the connecting shell in the switching power supply to achieve stable grounding. While saving the cost efficiency of the switching power supply, it also comprehensively improves the electrical performance and mechanical reliability of the switching power supply.

[0007] A second aspect of this application provides a switching power supply, which includes an input ground wire and a switching power supply grounding connection structure as described in the first aspect of this application. The connecting housing further includes a circumferential sidewall, and a connecting bottom wall connects to the circumferential sidewall to jointly constrain the formation of a first opening and a receiving cavity. The first opening communicates with the receiving cavity and the external space of the connecting housing. The switching power supply grounding connection structure also includes a first end cap, which connects the connecting bottom wall and the circumferential sidewall and covers the first opening. The input ground wire is connected to the first end cap, and its first end is electrically connected to a circuit board assembly.

[0008] A third aspect of this application provides a lighting device, which includes a lighting body and a switching power supply as described in the second aspect of this application. The lighting body is electrically connected to the switching power supply, which supplies power to the lighting body.

[0009] Since the beneficial effects of the second and third aspects of the embodiments of this application are derived from the first aspect of the embodiments of this application, the main beneficial effects of the second and third aspects of the embodiments of this application can be specifically referred to the beneficial effects of the first aspect of the embodiments of this application, and will not be repeated here.

[0010] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, embodiments of this application are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the composition of the lighting device in this application;

[0013] Figure 2 This is a schematic diagram of the switching power supply in this application;

[0014] Figure 3 for Figure 2 Exploded view;

[0015] Figure 4 for Figure 3 Further exploded view of the middle structure;

[0016] Figure 5 for Figure 2 A schematic diagram of the grounding connection structure of a switching power supply.

[0017] Figure 6 for Figure 4 Schematic diagram of the structure of the medium fastener;

[0018] Figure 7 for Figure 5 A bottom view of the structure shown;

[0019] Figure 8 for Figure 7 Cross-sectional view at point AA.

[0020] Figure label:

[0021] 1000-Lighting device, 1001-Lighting body, 1002-Switching power supply, 1003-Input line group, 1004-Switching power supply grounding connection structure, 1-Connecting shell, 10-Receiving cavity, 11-Connecting bottom wall, 110-Connecting through hole, 12-First opening, 13-Circuitary side wall, 2-Circuit board assembly, 20-Substrate, 200-Positioning through hole, 21-Fastener, 210-Connecting end face, 211-Head, 212-Positioning part, 3-Connector, 4-Sealer, 5-First end cover, 50-Mounting through hole, 6-Mounting positioning element, 60-Mounting channel. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0023] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application pertains. The terms “an,” “a,” or “the,” as used herein, do not indicate a limitation of quantity, but are merely used to indicate the presence of at least one. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] In the fields of infrastructure (such as smart cities, smart streetlights, smart lighting) and special equipment, power supply equipment is facing higher market demands, such as higher protection levels, stronger environmental adaptability, more stable electrical connections and longer service life. Traditional power supply equipment still faces some problems in use, which affect the normal operation of the power supply equipment.

[0026] In traditional power supply equipment, riveting is used when wiring the power supply structure to achieve electrical connection between the power supply equipment casing and the ground wire through electrical wires. Taking the connection of a three-core wire in a power supply equipment as an example, the input wire group composed of the three core wires needs to pass through the side cover of the power supply equipment casing, and then be riveted to the circuit board assembly inside the casing cavity to achieve electrical connection between the three core wires and the circuit board assembly. In other words, traditional power supply equipment uses riveting to rivet each of the three core wires (including L wire, N wire and ground wire) to its corresponding installation position to achieve electrical conduction.

[0027] However, since the ground wire and the circuit board assembly in the three-core cable are connected by a riveting process, the connection stability between the ground wire and the circuit board assembly may be affected by the riveting strength. Furthermore, since the riveting requires regular maintenance, if the riveting strength is reduced, it will especially affect the stability of the electrical connection between the power supply casing and the ground wire, thereby affecting the normal operation of the power supply structure.

[0028] To address the aforementioned issues, this application provides a switching power supply grounding connection structure, a switching power supply, and a lighting device, wherein the switching power supply utilizes the switching power supply grounding connection structure, and the lighting device utilizes the switching power supply.

[0029] To better understand the technical content of this solution, the appendix in the embodiments of this application will be discussed below. Figure 1 To be continued Figure 8 The technical solutions in the embodiments of this application are described clearly and completely.

[0030] First, please refer to Figure 1 This application provides a lighting device 1000, which includes a lighting body 1001 and a switching power supply 1002. The lighting body 1001 is electrically connected to the switching power supply 1002, and the switching power supply 1002 is used to supply power to the lighting body 1001.

[0031] The lighting device 1000 can be a household lamp, a municipal lamp, a bright sign, etc., and this application does not impose any restrictions.

[0032] Please refer to the references. Figures 2 to 8 This application also provides a switching power supply 1002, which includes a switching power supply ground connection structure 1004. In one embodiment, as shown in the figure, the switching power supply ground connection structure 1004 includes a connecting housing 1, a circuit board assembly 2 and at least one connector 3. The connecting housing 1 has a receiving cavity 10 for accommodating the electrical components involved in the switching power supply ground connection structure 1004.

[0033] The connecting shell 1 includes a connecting bottom wall 11, which can form a structural connection with an electrical component. Specifically, the connecting bottom wall 11 is part of the cavity wall of the receiving cavity 10. The connecting bottom wall 11 has at least one connecting through hole 110, which connects the receiving cavity 10 and the external space of the connecting shell 1.

[0034] The circuit board assembly 2 is located within the receiving cavity 10. A connector 3 passes through the connecting via 110 and connects the circuit board assembly 2 to the connecting bottom wall 11. The connector 3 enables electrical connection between the circuit board assembly 2 and the connecting housing 1. The connector 3 can rigidly connect the circuit board assembly 2 to the connecting bottom wall 11, thereby ensuring a stable connection between the circuit board assembly 2 and the connecting housing 1 in the switch assembly.

[0035] You can continue to refer to this. Figures 2 to 4 In the switching power supply 1002, the switching power supply 1002 also includes an input ground wire (one of the input lines in the input line group 1003 shown in the figure), which is used to electrically connect the circuit board assembly 2 so that the circuit board assembly 2 can be grounded. However, based on safety considerations for the switching power supply 1002, the connection shell 1 in the switching power supply 1002 also needs to be grounded. In the aforementioned embodiment, since the connector 3 can stably connect the circuit board assembly 2 to the connection shell 1 in the switching assembly, a stable electrical connection can be maintained between the circuit board assembly 2 and the connection shell 1. Therefore, as long as the input ground wire is connected to the circuit board assembly 2, due to the electrical connection between the circuit board assembly 2 and the connection shell 1, the input ground wire and the connection shell 1 are also electrically connected. Furthermore, based on the connector 3's hard connection of the connection bottom wall 11 in the connection shell 1 to the circuit board assembly 2, the connection bottom wall 11 and the circuit board assembly 2 are connected... The circuit board assembly 2 and the connecting bottom wall 11 have a high-strength hard connection relationship. In other words, a stable electrical connection is achieved between the circuit board assembly 2 and the connecting bottom wall 11 through a stable connection relationship. The way in which the connector 3 is hard-connected to the connecting shell 1 replaces the existing method of connecting the connector 3 and the connecting shell 1 by riveting wires. This avoids the defects of incomplete connection caused by insufficient riveting strength between the wires and the connector 3 and / or the connecting shell 1, reduces the rework rate, saves material costs and processing steps, and enables the connecting shell 1 in the switching power supply 1002 to achieve stable grounding. While saving the cost efficiency of the switching power supply 1002, it also comprehensively improves the electrical performance and mechanical reliability of the switching power supply 1002.

[0036] Furthermore, since the circuit board assembly 2 and the connecting shell 1 are electrically connected via the connector 3, which acts as a conductor for this connection, no additional conductive wires are needed between them. This reduces the total number of wires inside the switching power supply 1002, effectively lowering electromagnetic interference (EMI) during operation. Reducing EMI significantly improves the performance and reliability of the switching power supply 1002, minimizing mutual interference between internal components and ensuring more stable and accurate signal transmission. It also enhances the electromagnetic compatibility of the switching power supply 1002, enabling it to operate normally in complex electromagnetic environments and reducing interference with other devices. Moreover, reducing EMI extends equipment lifespan, lowers failure rates, optimizes circuit design, reduces filter size, and lowers design costs. In addition, reducing EMI not only improves user experience but also reduces the potential health effects of electromagnetic radiation, providing users with safer and more reliable equipment.

[0037] It should be noted that when the switching power supply 1002 is operating, the change in current in the conductors generates a changing magnetic field. According to Faraday's law of electromagnetic induction, this changing magnetic field induces an electromotive force in nearby conductors, thus generating electromagnetic interference (EMI). Reducing the number of conductors directly reduces the number of magnetic field sources and lowers the probability of mutual inductive coupling. Therefore, reducing the number of conductors can effectively reduce electromagnetic interference (EMI).

[0038] It should be noted that the aforementioned switching power supply 1002 can be applied to lighting devices 1000, but is not limited to them. It can also be applied to processing devices, household devices, etc.

[0039] Please refer to Figures 3 to 6 In some embodiments, the circuit board assembly 2 includes a substrate 20 and fasteners 21. The substrate 20 is an insulating material used to support and connect electronic components, typically made of composite materials such as glass fiber reinforced epoxy resin, possessing good electrical insulation properties, mechanical strength, and thermal stability, providing a basic platform for circuit layout and assembly. Fasteners 21 are mounted on the substrate 20 and are used to connect the connectors 3, enabling the substrate 20 to be stably connected to the connecting side plate of the connecting shell 1 through the connection relationship between the fasteners 21 and the connectors 3, thereby achieving electrical conductivity between the substrate 20 and the connecting shell 1.

[0040] Since the substrate 20 is equipped with fasteners 21, the structure that has a direct connection with the connector 3 is the fastener 21. That is, when the connector 3 connects to the circuit board assembly 2, it is directly connected to the fastener 21. The connector 3 is in direct contact with the fastener 21 during the connection process. Therefore, the connector 3 will not wear down the substrate 20 when connecting the circuit board assembly 2. The wear damage caused by the assembly in the circuit board assembly 2 is borne by the fastener 21. Moreover, the frequent disassembly and assembly between the circuit board assembly 2 and the connector 3 is unlikely to damage the substrate 20. In this way, the maintenance cost and maintenance difficulty of the circuit board assembly 2 are reduced.

[0041] You can refer to them together. Figure 3 , Figure 5 and Figure 6 In some embodiments, the connecting end face 210 of the fastener 21 is attached to the surface of the substrate 20 so that the fastener 21 is stably connected to the substrate 20. The fastener 21 can be mounted on the surface of the substrate 20 by means of soldering, tinning or other methods so that the connecting end face 210 of the fastener 21 is attached to the surface of the substrate 20.

[0042] For reference Figure 6In some embodiments, the fastener 21 includes a head 211 and a positioning portion 212 connected together. The head 211 is larger than the positioning portion 212, so as to form a connecting end face 210 at the connection between the head 211 and the positioning portion 212. The connecting end face 210 is used to connect to the surface of the substrate 20. The substrate 20 has a positioning through hole 200, the positioning portion 212 is located in the positioning through hole 200, and the connecting end face 210 abuts against the surface of the substrate 20. During the process of fastener 21 connecting to substrate 20, positioning part 212 is first inserted through substrate 20 so that fastener 21 can be positioned at the corresponding position on substrate 20. This prevents fastener 21 from shifting relative to substrate 20 when the switching power supply 1002 is in a vibrating or bumpy environment, thus affecting the structural stability of circuit board assembly 2. Connecting end face 210 abuts against the surface of substrate 20. Then, the connecting end face 210 is bonded to the surface of substrate 20 through processes such as welding and bonding, so that a stable connection relationship is formed between fastener 21 and substrate 20, thereby making fastener 21 stably connected to substrate 20. Connector 3 connects to head 211 of fastener 21 so that circuit board assembly 2 is connected to connecting bottom wall 11.

[0043] In some embodiments, the fastener 21 is a blind hole nut, and / or the connector 3 is a countersunk screw. Due to the structural characteristics of the blind hole nut and the countersunk screw, the connection channel formed by the structure of the blind hole nut and the countersunk screw cannot connect the external space of the receiving cavity 10 and the connecting shell 1. External water vapor and dust are difficult to enter the receiving cavity 10 through the connection channel formed by the structure of the blind hole nut and the countersunk screw. Thus, the environment in the receiving cavity 10 is maintained, and the circuit board assembly 2 will not be contaminated or corroded by external water vapor and dust entering the receiving cavity 10, thereby maintaining the functionality and service life of the circuit board assembly 2.

[0044] Please refer to this as well. Figures 3 to 5 In some embodiments, the switching power supply grounding connection structure 1004 further includes a sealing member 4, which is sleeved on the outer periphery of the fastener 21 so that it can be positioned by the fastener 21 at the location of the fastener 21. The sealing member 4 abuts against the connection bottom wall 11 and the substrate 20, so that the sealing member 4 can seal the connection between the connection bottom wall 11 and the substrate 20 and seal the connection through hole 110, so as to further isolate the external space of the receiving cavity 10 and the connecting shell 1, making it difficult for water vapor and dust in the external space of the connecting shell 1 to enter the receiving cavity 10 through the gap between the connector 3 and the hole wall of the connection through hole 110.

[0045] In some embodiments, the seal 4 includes an elastic element with elastic deformation capability. When the seal 4 abuts between the connecting bottom wall 11 and the substrate 20, the seal 4 can absorb the squeezing effect of the substrate 20 and the connecting bottom wall 11 on the seal 4 through its own deformation, thereby reducing the interaction between the seal 4, the substrate 20 and the connecting bottom wall 11, reducing the probability that any one of the seal 4, the substrate 20 and the connecting bottom wall 11 will deform and be damaged due to interaction, and maintaining the stability of the switching power supply grounding connection structure 1004.

[0046] For reference Figure 7 and Figure 8 In some embodiments, the first sidewall has two spaced-apart connection holes 110. The switching power supply grounding connection structure 1004 includes two connectors 3, with each connector 3 corresponding to a connection hole 110. Thus, two connections can be formed between the substrate 20 and the connecting side plate due to the connectors 3, which improves the connection strength between the substrate 20 and the connecting side plate and maintains the structural stability of the switching power supply grounding connection structure 1004. This allows the substrate 20 to be stably located in the receiving cavity 10. When the switching power supply 1002 is in a vibrating or bumpy environment, the substrate 20 and the connecting side plate can maintain a stable connection state, which ensures the structural stability of the switching power supply 1002. The stable connection between the substrate 20 and the connecting side plate also ensures the stability of the electrical connection between the substrate 20 and the connecting side plate, thereby enabling the connecting shell 1 to be stably grounded.

[0047] In some embodiments, the connecting shell 1 is a metal shell and / or the connector 3 is a metal component. Based on the good conductivity of metal, the fact that the connecting shell 1 is a metal shell and / or the connector 3 is a metal component enables the connecting shell 1 and the circuit board assembly 2 to maintain a good electrical connection. At the same time, since metal has a certain strength, the fact that the connecting shell 1 is a metal shell and / or the connector 3 is a metal component also enables the connecting shell 1 and the connector 3 to have good structural stability, thereby extending the service life of the switching power supply grounding connection structure 1004 and reducing the subsequent maintenance cost of the switching power supply 1002.

[0048] In addition, metal is a common material with low cost and mature processing technology, which can effectively reduce the manufacturing cost of connecting shell 1 and connector 3.

[0049] In other embodiments, the connecting shell 1 is a conductive plastic shell, and / or the connector 3 is a conductive plastic component. Alternatively, conductive wires are added inside the connecting shell 1, and / or conductive wires are added to the connector 3, so that the connecting shell 1 and the connector 3 have conductive functions, and the connecting shell 1 can be electrically connected to the circuit board assembly 2 through the connector 3.

[0050] Can be referenced again Figure 2 , Figure 5 and Figure 8 In some embodiments, the connecting shell 1 further includes a circumferential sidewall 13, and the connecting bottom wall 11 connects to the circumferential sidewall 13 to jointly constrain the formation of the first opening 12 and the receiving cavity 10. The first opening 12 connects the receiving cavity 10 with the external space of the connecting shell 1, and the circuit board assembly 2 can enter the receiving cavity 10 through the first opening 12.

[0051] like Figures 2 to 4 As shown, the switching power supply grounding connection structure 1004 also includes a first end cover 5. The first end cover 5 connects the connecting bottom wall 11 and the circumferential side wall 13, so that the first end cover 5 covers the first opening 12. The first end cover 5 can further isolate the external space of the receiving cavity 10 and the connecting shell 1. The input ground wire (one of the input lines in the input line group 1003 shown in the figure) is connected to the first end cover 5, and the first end of the input ground wire is electrically connected to the circuit board assembly 2. Thus, through the structural connection relationship and electrical connection relationship between the circuit board assembly 2, the connector 3 and the connecting bottom wall 11, the input ground wire can be electrically connected to the circuit board assembly 2 and the connecting shell 1, thereby achieving effective grounding.

[0052] Please refer to this again. Figure 4 In some embodiments, the switching power supply 1002 further includes a mounting positioning member 6 having a mounting channel 60 for passing through an input ground wire. The first end cover 5 is provided with a mounting through hole 50. The mounting positioning member 6 is connected to the first end cover 5. The mounting positioning member 6 is used to isolate the input line group 1003 from the hole wall of the mounting through hole 50 to reduce wear caused by contact between the input line group 1003 and the hole wall of the mounting through hole 50.

[0053] Mounting channel 60 corresponds to mounting via 50 so that mounting channel 60 and mounting via 50 can form a channel for the input line group 1003 to pass through. The input ground wire passes through mounting channel 60 and mounting via 50, with the first end of the input ground wire located in receiving cavity 10 and connected to the ground pad (not shown) of circuit board assembly 2, thereby realizing the electrical connection of the input ground wire to circuit board assembly 2.

[0054] It should be noted that a grounding pad is a dedicated connection point used on circuit boards or electrical equipment. It is typically a flat area made of metal (such as copper) and its main function is to provide a stable reference potential for the circuit. Connected to the ground via a wire, it ensures that current in the circuit can safely flow to the ground in the event of a fault or abnormality, thus protecting equipment and personnel. At the same time, the grounding pad can effectively reduce electromagnetic interference and improve the signal integrity and stability of the circuit.

[0055] In the above embodiments, the input ground wire is connected to the grounding pad to ensure the safe and stable operation of the circuit. The grounding pad provides a low-impedance path, enabling the input ground wire to effectively guide excess charge, interference signals, and fault current in the circuit to the ground. This prevents the connection housing 1 from becoming energized, avoiding electric shock accidents, while also reducing the impact of electromagnetic interference on the circuit, ensuring the normal operation of the electronic equipment and the stable transmission of signals.

[0056] It should be noted that the descriptions of each embodiment in the above embodiments have different emphases. Parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0057] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A grounding connection structure for a switching power supply, characterized in that, include: A connecting shell portion having a receiving cavity, the connecting shell portion including a connecting bottom wall, the connecting bottom wall being part of the cavity wall of the receiving cavity, the connecting bottom wall having at least one connecting through hole, the connecting through hole communicating between the receiving cavity and the external space of the connecting shell portion; Circuit board assembly, the circuit board assembly being located within the receiving cavity; and At least one connector is disposed within the connection via and connected to the circuit board assembly and the connection bottom wall, the connector enabling electrical connection between the circuit board assembly and the connection housing.

2. The switching power supply grounding connection structure as described in claim 1, characterized in that, The circuit board assembly includes a substrate and fasteners, the fasteners being assembled on the substrate and used to connect the connectors.

3. The switching power supply grounding connection structure as described in claim 2, characterized in that, The connecting end face of the fastener is fitted to the surface of the substrate; and / or The fastener is a blind hole nut, and / or the connector is a countersunk screw.

4. The switching power supply grounding connection structure as described in claim 2, characterized in that, The switching power supply grounding connection structure also includes a sealing element, which is sleeved on the outer periphery of the fastener and abuts against the connection bottom wall and the substrate.

5. The switching power supply grounding connection structure as described in claim 4, characterized in that, The sealing element includes an elastic element.

6. The switching power supply grounding connection structure as described in claim 1, characterized in that, The bottom wall of the connection has two connection vias spaced apart, and the grounding connection structure of the switching power supply includes two connectors, with one connector corresponding to one connection via.

7. The switching power supply grounding connection structure as described in claim 1, characterized in that, The connecting shell is a metal shell. And / or, the connector is a metal component.

8. A switching power supply, characterized in that, include: Input ground wire; The switching power supply grounding connection structure as described in any one of claims 1-7, wherein the connecting shell portion further includes a circumferential sidewall, and the connecting bottom wall is connected to the circumferential sidewall to jointly constrain the formation of the first opening and the receiving cavity, wherein the first opening communicates the receiving cavity with the external space of the connecting shell portion; The switching power supply grounding connection structure further includes a first end cover, which is connected to the connecting bottom wall and the circumferential side wall, so that the first end cover covers the first opening. The input ground wire is connected to the first end cover, and the first end of the input ground wire is electrically connected to the circuit board assembly.

9. The switching power supply as described in claim 8, characterized in that, The switching power supply also includes a mounting positioning component, which has a mounting channel for passing through the input ground wire; The first end cap is provided with a mounting through hole, the mounting positioning member is connected to the first end cap, and the mounting channel corresponds to the mounting through hole. The input ground wire passes through the mounting channel and the mounting through hole. The first end of the input ground wire is located in the receiving cavity, and the first end is connected to the grounding pad of the circuit board assembly.

10. A lighting device, characterized in that, It includes a lighting body and a switching power supply as described in claim 8 or 9, wherein the lighting body is electrically connected to the switching power supply, and the switching power supply is used to supply power to the lighting body.

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