A light fixture based on on-board driving DOB

Abstract

The utility model relates to lighting field discloses a kind of lamps and lanterns based on on-board drive DOB, including plastic back cover, heat dissipation shell, diffusion plate and DOB drive module, the DOB drive module includes drive circuit and luminous element integrated on the same substrate, the heat dissipation shell is made of metal material, and one side is fixedly connected with the plastic back cover, another side is fixedly connected with the diffusion plate, the inner surface of the plastic back cover is provided with buckle assembly, and the buckle assembly includes a plurality of first buckle pieces for connecting heat dissipation shell and a plurality of second buckle pieces for connecting DOB drive module.The utility model provides lamp and lantern that plastic back cover is combined with metal heat dissipation shell, and the second buckle piece of plastic back cover inner surface is used to connect DOB drive module, so that DOB drive module can be installed with heat dissipation shell and keep non-contact state, avoid the leakage problem that appears with metal heat dissipation shell contact, satisfy the electrical safety requirement and heat dissipation performance of two kinds of lamps and lanterns.

Description

Technical Field

[0001] This application relates to the field of lighting, and in particular to a luminaire based on an onboard driver DOB. Background Technology

[0002] In the field of lighting technology, with the improvement of people's living standards and the increase in requirements for electrical safety, the electrical safety and installation flexibility of lamps have received more and more attention. Class II lamps, due to their characteristics of not relying on grounding protection and only relying on double insulation or reinforced insulation to achieve protection against electric shock, exhibit high electrical safety and installation flexibility, and are widely used in homes, businesses and humid environments.

[0003] Existing Class II lighting fixtures have significant limitations in their structural design. While plastic shells can meet insulation requirements, the material itself has poor thermal conductivity, resulting in insufficient heat dissipation. This can easily lead to increased junction temperature, accelerated light decay, and reduced lifespan. Furthermore, plastic shells are relatively inferior in terms of texture, strength, and appearance, making it difficult to meet the design requirements of mid-to-high-end lighting products. If metal shells are used to improve heat dissipation and product texture, since metal shells are usually accessible conductive parts, additional leakage prevention measures must be taken. These measures not only increase the number of parts and material costs but also require ensuring reliable connections during assembly, leading to complex assembly processes, reduced production efficiency, and increased difficulty in quality control.

[0004] Therefore, developing a DOB luminaire based on onboard driver to solve the technical problems of insufficient electrical safety and heat dissipation performance of existing Class II luminaires has become an important issue that urgently needs to be addressed. Utility Model Content

[0005] In order to address the technical problems of insufficient electrical safety and heat dissipation performance in existing Class II lighting fixtures, this application provides a lighting fixture based on onboard driver DOB.

[0006] A luminaire based on onboard driver DOB includes a plastic back cover, a heat sink housing, a diffuser plate, and a DOB driver module. The DOB driver module includes a driver circuit and a light-emitting element integrated on the same substrate. The heat sink housing is made of metal and is fixedly connected to the plastic back cover on one side and to the diffuser plate on the other side. The inner surface of the plastic back cover is provided with a snap-fit ​​assembly, which includes a plurality of first snap-fit ​​members for connecting the heat sink housing and a plurality of second snap-fit ​​members for connecting the DOB driver module.

[0007] By adopting the above technical solution, the luminaire provided in this application combines a plastic back cover with a metal heat sink housing, giving full play to the advantages of both. On the one hand, the plastic back cover can achieve insulation, meeting the electrical safety requirements of Class II luminaires that do not rely on grounding. On the other hand, the metal heat sink housing has good heat dissipation performance and high texture, improving the heat dissipation effect and appearance of the luminaire, and ensuring the stable operation and long life of the DOB driver module.

[0008] Meanwhile, the inner surface of the plastic back cover features a snap-fit ​​assembly. The first snap-fit ​​connects to the heat sink housing, ensuring a secure fixation and preventing loosening. The second snap-fit ​​connects to the DOB driver module, enabling reliable module installation while maintaining a non-contact relationship between the DOB driver module and the heat sink housing. This avoids leakage issues caused by contact with the metal heat sink housing, improving the safety of the luminaire. Therefore, this snap-fit ​​connection method simplifies the assembly structure, reduces manufacturing costs, improves production efficiency, and ensures connection reliability, further guaranteeing the safety of the luminaire.

[0009] Furthermore, the first buckle is disposed on the outer periphery of the inner surface of the plastic back cover, and the top of the heat dissipation housing is provided with a plurality of first card interfaces adapted to the first buckle. The plastic back cover is fixedly connected to the heat dissipation housing through the snap-fit ​​engagement of the first buckle and the first card interfaces.

[0010] By adopting the above technical solution, the first buckle is set on the outer periphery of the inner surface of the plastic back cover, and the top of the heat dissipation housing is provided with a matching first buckle interface. The two are used to snap together to fix the plastic back cover and the heat dissipation housing. This method does not require an additional complex connection structure, simplifies the assembly structure of the lamp, reduces the number of parts and material costs, improves production efficiency, and ensures the stability of the connection.

[0011] Furthermore, the inner surface of the plastic back cover has a protrusion forming a limiting post, and the second fastener is disposed on the circumferential sidewall of the limiting post. The DOB drive module is provided with multiple second card interfaces adapted to the second fastener. The DOB drive module achieves suspension and fixation on the inner surface of the plastic back cover through the snap-fit ​​cooperation between the second fastener and the second card interfaces.

[0012] By adopting the above technical solution, a protruding limiting post and a second latching member on the circumferential sidewall are provided on the inner surface of the plastic back cover. The second latching member engages with the second card interface of the DOB drive module, and the limiting post abuts against the DOB drive module. This further enables the DOB drive module to be suspended and fixed on the inner surface of the plastic back cover. The combination of the limiting post and the second latching member makes the suspension fixation more stable. This suspension fixation method avoids contact between the DOB drive module and the plastic back cover, and also avoids direct contact with the metal heat sink. This is beneficial for the heat dissipation of the DOB drive module, while ensuring its safety and extending its service life.

[0013] Furthermore, the minimum distance between the DOB drive module and the inner surface of the heat sink housing is greater than or equal to 3 mm.

[0014] By adopting the above technical solution, the minimum distance between the DOB driver module and the inner surface of the heat sink housing is greater than or equal to 3mm. Without relying on grounding, leakage problems caused by the DOB driver module being too close to the heat sink housing can be avoided, realizing the safe application of metal housing in Class II luminaires, ensuring the electrical safety of the luminaires, and also reducing mutual interference between the DOB driver module, heat sink housing and plastic back cover, which is conducive to heat dissipation.

[0015] Furthermore, the DOB drive module is connected to a power cord, and a clearance hole is provided on the outer side of the plastic back cover. The end of the power cord away from the DOB drive module is exposed through the clearance hole on the plastic back cover.

[0016] By adopting the above technical solution, the power cord connected to the DOB drive module can be exposed through the clearance hole on the outside of the plastic back cover, avoiding the power cord from being messily tangled inside the lamp and making the internal structure more orderly. This design facilitates the connection of the power cord to the external power supply, making the installation and use of the lamp easier and improving the overall reliability and ease of use of the lamp.

[0017] Furthermore, the inner surface of the plastic back cover is provided with a locking groove, the locking groove is provided with an S-shaped channel, and the power cord portion is fixed in the S-shaped channel.

[0018] By adopting the above technical solution, a locking groove with an S-shaped channel is set at the bottom of the plastic back cover, and the power cord is fixed in the S-shaped channel. This effectively fixes the power cord and prevents it from loosening or shifting during the use of the lamp, ensuring the stability and reliability of the power cord connection. At the same time, the design of the S-shaped channel increases the contact area and friction between the power cord and the locking groove, further enhancing the fixing effect. In addition, this design makes the arrangement of the power cord more orderly, avoiding the safety hazards that may be caused by messy power cords, improving the overall safety and stability of the lamp, and also helping to simplify the assembly process of the lamp and reduce production costs.

[0019] Furthermore, the heat dissipation housing is made of either iron or aluminum.

[0020] By adopting the above technical solution, the heat dissipation shell is made of iron or aluminum metal materials, which improves the heat dissipation performance and product quality of the lamp. At the same time, combined with the overall design, the metal shell can be safely used in Class II lamps without relying on grounding.

[0021] Furthermore, multiple heat dissipation holes are provided on the outer surface of the plastic back cover.

[0022] By adopting the above technical solution, multiple heat dissipation holes are set on the outer surface of the plastic back cover, which can realize air convection, effectively improve the heat dissipation effect of the lamp, avoid problems such as increased junction temperature and accelerated light decay caused by insufficient heat dissipation, extend the service life of the lamp, and at the same time better balance the electrical safety and heat dissipation performance of Class II lamps.

[0023] In summary, this application includes at least the following beneficial technical effects: (1) The luminaire provided in this application combines the plastic back cover with the metal heat sink housing, which gives full play to the advantages of both, meets the electrical safety requirements and heat dissipation performance of Class II luminaires, and ensures the stable operation and long life of the DOB drive module. (2) The second fastener is used to connect the DOB drive module, so as to ensure reliable installation of the module and keep the DOB drive module in a non-contact state with the heat sink, avoiding leakage problems caused by contact with the metal heat sink. This not only simplifies the assembly structure but also improves the safety of the lamp. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a lamp based on an onboard driver DOB provided by an embodiment of the present invention; Figure 2 This is an exploded view of a lamp based on an onboard driver DOB provided in an embodiment of this utility model; Figure 3 This is a schematic diagram of the structure of a plastic back cover for a lamp based on an onboard driver DOB, provided by an embodiment of this utility model; Figure 4 This is a cross-sectional view of a lamp based on an onboard driver DOB provided in an embodiment of this utility model.

[0025] Explanation of reference numerals in the attached figures: 1. Plastic back cover; 11. Buckle assembly; 111. First buckle; 112. Second buckle; 12. Limiting post; 13. Alternating hole; 14. Locking slot; 15. Heat dissipation hole; 2. Heat dissipation shell; 21. First card interface; 3. Diffuser plate; 4. DOB driver module; 41. Second card interface; 5. Power cord. Detailed Implementation

[0026] The following combination Figure 1-4 The technical solutions in the embodiments of this utility model will be described in detail.

[0027] See Figure 1-3 This embodiment provides a lamp based on onboard DOB driver, including a plastic back cover 1, a heat sink 2, a diffuser plate 3, and a DOB driver module 4. The DOB driver module 4 includes a driving circuit and a light-emitting element integrated on the same substrate. The heat sink 2 is made of metal material and is fixedly connected to the plastic back cover 1 on one side and to the diffuser plate 3 on the other side. The inner surface of the plastic back cover 1 is provided with a snap-fit ​​assembly 11, which includes a plurality of first snap-fit ​​pieces 111 for connecting the heat sink 2 and a plurality of second snap-fit ​​pieces 112 for connecting the DOB driver module 4.

[0028] Among them, combined Figure 4 The minimum distance between the DOB drive module 4 and the inner surface of the heat sink 2 is greater than or equal to 3mm. In this embodiment, the minimum distance between the DOB drive module 4 and the inner surface of the heat sink 2 is 3mm, that is, the distance between the side of the DOB drive module 4 near the plastic back cover 1 and the top of the heat sink 2 is 3mm.

[0029] As an optional implementation, the heat dissipation housing 2 is made of either iron or aluminum. In this embodiment, the heat dissipation housing 2 is made of iron.

[0030] Specifically, the first latch 111 is disposed on the outer periphery of the inner surface of the plastic back cover 1, and the top of the heat dissipation housing 2 is provided with a plurality of first card interfaces 21 adapted to the first latch 111. The plastic back cover 1 is fixedly connected to the heat dissipation housing 2 through the snap-fit ​​engagement of the first latch 111 and the first card interfaces 21. Further, the inner surface of the plastic back cover 1 has a protrusion forming a limiting post 12, and the second latch 112 is disposed on the circumferential sidewall of the limiting post 12. The DOB drive module 4 is provided with a plurality of second card interfaces 41 adapted to the second latch 112. The DOB drive module 4 is suspended and fixed on the inner surface of the plastic back cover 1 through the snap-fit ​​engagement of the second latch 112 and the second card interfaces 41, and the limiting post 12 abuts against the DOB drive module 4.

[0031] In order to improve the assembly stability of the plastic back cover 1 and the heat sink housing 2, and the plastic back cover 1 and the DOB drive module 4, in this embodiment, four first buckle pieces 111 are arranged at intervals and are respectively engaged with the first buckle interface 21 of the heat sink housing 2, and three second buckle pieces 112 are arranged at intervals and are respectively engaged with the second buckle interface 41 of the DOB drive module 4.

[0032] Furthermore, the DOB drive module 4 is connected to a power cord 5, and a clearance hole 13 is provided on the outer side of the plastic back cover 1. The end of the power cord 5 away from the DOB drive module 4 is exposed through the clearance hole 13 on the plastic back cover 1.

[0033] To prevent the power cord from loosening during the use of the lamp, a locking groove 14 is provided at the bottom of the plastic back cover 1. The locking groove 14 is provided with an S-shaped channel, and the power cord 5 is partially fixed in the S-shaped channel. Specifically, the locking groove 14 is formed by multiple spaced protruding baffles, and the protruding baffles have through holes, which form an S-shaped channel.

[0034] To further improve the heat dissipation effect of the lamp, multiple heat dissipation holes 15 are provided on the outer surface of the plastic back cover 1.

[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A luminaire based on onboard driver DOB, characterized in that: The device includes a plastic back cover, a heat sink housing, a diffuser plate, and a DOB driving module. The DOB driving module includes a driving circuit and a light-emitting element integrated on the same substrate. The heat sink housing is made of metal and is fixedly connected to the plastic back cover on one side and to the diffuser plate on the other side. The inner surface of the plastic back cover is provided with a snap-fit ​​assembly, which includes multiple first snap-fit ​​members for connecting the heat sink housing and multiple second snap-fit ​​members for connecting the DOB driving module.

2. A luminaire based on onboard driver DOB according to claim 1, characterized in that: The first fastener is disposed on the outer periphery of the inner surface of the plastic back cover. The top of the heat dissipation housing is provided with a plurality of first card interfaces adapted to the first fastener. The plastic back cover is fixedly connected to the heat dissipation housing through the snap-fit ​​engagement of the first fastener and the first card interfaces.

3. A luminaire based on onboard driver DOB according to claim 1, characterized in that: The inner surface of the plastic back cover has a protrusion forming a limiting post. The second fastener is disposed on the circumferential sidewall of the limiting post. The DOB drive module is provided with multiple second card interfaces adapted to the second fastener. The DOB drive module is suspended and fixed on the inner surface of the plastic back cover by the engagement of the second fastener with the second card interfaces.

4. A luminaire based on onboard driver DOB according to claim 1, characterized in that: The minimum distance between the DOB drive module and the inner surface of the heat sink housing is greater than or equal to 3 mm.

5. A luminaire based on onboard driver DOB according to any one of claims 1-4, characterized in that: The DOB drive module is connected to a power cord, and a clearance hole is provided on the outer side of the plastic back cover. The end of the power cord away from the DOB drive module is exposed through the clearance hole on the plastic back cover.

6. A luminaire based on onboard driver DOB according to claim 5, characterized in that... The inner surface of the plastic back cover is also provided with a locking groove, which has an S-shaped channel, and the power cord is fixed in the S-shaped channel.

7. A luminaire based on onboard driver DOB according to claim 1, characterized in that: The heat dissipation housing is made of either iron or aluminum.

8. A luminaire based on onboard driver DOB according to claim 1, characterized in that: The outer surface of the plastic back cover has multiple heat dissipation holes.

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