An easy-to-seal LED lighting module

Abstract

This utility model relates to an easily sealable LED lighting module, which includes a heat sink, a light source assembly, and cables. The light source assembly is mounted and fixed on the upper surface of a light source mounting plate on the heat sink, and the cables are connected to the light source in the light source assembly. The light source in the light source assembly is a single COB point light source, which is fixed on the light source mounting plate with a phase change interface material between them. This utility model facilitates sealing, reduces the processing difficulty of components, and solves the heat dissipation problem when using COB point light sources, as well as the high thermal resistance problem between the light source and the heat sink.

Description

Technical Field

[0001] This utility model belongs to the field of LED lighting and relates to an LED lighting module that facilitates sealing performance. Background Technology

[0002] LED lighting modules are now commonly used in streetlights. However, in actual projects, many LED modules fail due to moisture intrusion. The cause of this is simply a failure of the module's seal. Currently, most LED streetlights in projects use SMD multi-light source structures, and SMD light sources have relatively high thermal resistance. To control the junction temperature of the light source and meet heat dissipation requirements, small light sources are usually distributed across the entire fixed surface of the heat sink. Each small light source requires a lens, resulting in a very large size of the light distribution element in the entire module. This not only increases the manufacturing difficulty of the light distribution element but also greatly increases the sealing length around the perimeter, which is at least 610mm, easily leading to sealing performance failure. In addition, due to the concentrated heat in the lighting module and the high temperature inside the lens, the thermal conductivity at the interface between the light source and the heat sink is poor. Currently, thermal pads or thermal paste are used, which have low thermal conductivity. The high temperature at the center of the light-emitting surface of the light source causes the insulation of the cables inside the lens to easily deteriorate and become brittle after long-term use, resulting in exposed wires, posing safety hazards and reducing reliability. At the same time, the mainstream light sources on the market are square in shape, with electrical pads located at two opposite corners, resulting in long winding distances for electrical connections. The wires are close to the light-emitting area, which further leads to the problem of cable aging and brittleness. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an LED lighting module that is easy to seal, which can reduce the processing difficulty of accessories and components.

[0004] To solve the above-mentioned technical problems, the present invention provides an easy-to-seal LED lighting module, which includes a heat sink, a light source assembly, and a cable; the light source assembly is mounted and fixed on the upper surface of the light source fixing plate of the heat sink, and the cable is connected to the light source in the light source assembly; the light source in the light source assembly is a single COB point light source, the COB point light source is fixed on the light source fixing plate, and a phase change interface material is provided between the two.

[0005] Furthermore, the COB point light source includes a substrate and an LED chip attached to the substrate; the positive and negative pads on the substrate are located on the same side of the substrate near the cable.

[0006] Furthermore, the substrate is square, and the positive electrode pad and the negative electrode pad are located on the substrate near the same side.

[0007] Furthermore, in the heat sink, the horizontally arranged and parallel heat dissipation fins are perpendicular to the light source fixing plate and integrally connected to the lower surface of the light source fixing plate.

[0008] Furthermore, the light source assembly also includes a lens, a lens rubber ring, and a protective pressure frame; the lens covers the light source, and its sealing flange is nested in the rectangular sealing groove inside the lens rubber ring; the protective pressure frame presses the lens rubber ring and is fixedly connected to the light source fixing plate.

[0009] The lens is made of a single piece of glass.

[0010] The lens is provided with a clearance groove.

[0011] The perimeter of both the sealing flange and the rectangular sealing groove is 250-350mm.

[0012] The protective pressure frame is a concave frame structure, with a first limiting structure at the four corners inside the concave frame, four side edges as a second limiting structure, and the top surface of the concave frame as a top protective structure.

[0013] The cable has one end sealed to a cable hole on the light source mounting plate; the other end has a standard interface for connecting to a standard power supply; two wires in the cable pass through a recessed slot on the lens and are electrically connected to the positive and negative electrode pads respectively. Beneficial effects:

[0014] 1. By using a single integrated COB point light source, the lens size can be reduced accordingly, avoiding the problem of difficult processing accuracy control caused by using large-size lenses. The sealing boundary length is reduced, making it easier to achieve sealing, and the processing difficulty of accessory components can be reduced.

[0015] 2. A phase change interface material is provided between the COB point light source and the light source fixing plate, which can solve the heat dissipation problem of COB point light source application, as well as the high thermal resistance problem between the light source and the heat sink.

[0016] 3. The positive and negative electrode pads are located on the same side of the substrate near the cable, resulting in a short wire winding distance and a greater distance from the light-emitting surface of the light source, thus ensuring good reliability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is an exploded view of the overall structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the radiator structure.

[0020] Figure 4a This is a schematic diagram of an existing COB point light source structure. Figure 4bThis is a schematic diagram of the COB point light source structure of this utility model.

[0021] Figure 5 This is a schematic diagram of a lens structure.

[0022] Figure 6 This is a schematic diagram of the lens rubber ring structure.

[0023] Figure 7 This is a schematic diagram of the protective pressure frame structure.

[0024] Figure 8 This is a schematic diagram of the cable structure.

[0025] In the diagram: 1. Heat sink; 11. Light source mounting plate; 111. Cable hole; 112. Frame fixing hole; 113. Mounting hole; 12. Heat sink fins; 2. Light source assembly; 21. Light source; 211. Substrate; 212. LED chip; 213. Positive electrode pad; 214. Negative electrode pad; 22. Lens; 221. Sealing flange; 222. Clear groove; 23. Lens rubber ring; 231. Rectangular sealing groove; 24. Protective frame; 241. First limiting structure; 242. Second limiting structure; 243. Top protection structure; 244. Countersunk hole; 25. Light source screw; 26. Phase change interface material; 27. Frame screw; 3. Cable; 31. Thread; 32. Rubber ring clamping structure; 33. Cable rubber ring; 34. Standard interface. Detailed Implementation

[0026] The present invention 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 merely for explaining the present invention and are not intended to limit the present invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the drawings, not the entire structure.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0030] like Figure 1 As shown, the easy-to-seal LED lighting module of this utility model includes a heat sink 1, a light source assembly 2, and a cable 3; the light source assembly 2 is mounted and fixed on the upper surface of the light source fixing plate 11 of the heat sink 1, and the cable 3 is connected to the light source in the light source assembly 2.

[0031] like Figure 2 , 3 As shown, the heat sink 1 includes a light source fixing plate 11 and horizontally arranged and parallel heat dissipation fins 12; each heat dissipation fin 12 is perpendicular to the light source fixing plate 11 and integrally connected to the lower surface of the light source fixing plate 11; the light source fixing plate 11 has a through cable hole 111 and a frame fixing hole 112; both ends of the light source fixing plate 11 are provided with through mounting holes 113 for mounting the entire lighting module on the lamp housing.

[0032] like Figure 2 As shown, the light source assembly 2 includes a light source 21, a lens 22, a lens rubber ring 23, and a protective pressure frame 24. The light source 21 is a single COB point light source, which is connected and fixed to the light source fixing plate 11 by a light source screw 25. A phase change interface material 26 is provided between the COB point light source and the light source fixing plate 11. When the light source 21 is ignited and generates heat, the phase change interface material 26 changes from a solid phase to a liquid phase, filling the gap between the light source 21 and the light source fixing plate 11, which can reduce the contact thermal resistance and enhance the heat collection capacity. The lens 22 covers the light source 21, and its sealing flange 221 is nested in the rectangular sealing groove 231 inside the lens rubber ring 23. The protective pressure frame 24 presses the lens rubber ring 23 and is fixedly connected to the light source fixing plate 11.

[0033] like Figure 4b As shown, the COB point light source includes a square substrate 211 and an LED chip 212 attached to the substrate 211; the positive electrode pad 213 and the negative electrode pad 214 on the substrate 211 are located on the substrate 211 near the same side.

[0034] like Figure 5 As shown, the lens 22 is made of a single piece of glass and has a clearance groove 222 on it to avoid interference with other wire accessories; the circumference of the sealing flange 221 is 250-350mm.

[0035] like Figure 6 As shown, the lens rubber ring 23 has elastic compression capability, and the perimeter of the rectangular sealing groove 231 on its inner side is 250-350mm.

[0036] like Figure 7 As shown, the protective pressure frame 24 is a concave frame structure. The pressure frame screw connection structure at the four corners of the concave frame serves as the first limiting structure 241, and the four side edges serve as the second limiting structure 242. The first limiting structure 241 and the second limiting structure 242 are used for radial fixing and protection of the lens rubber ring 23. The top surface of the concave frame serves as the top protective structure 243, which is used for axial fixing and protection of the lens rubber ring 23. The depth of the concave frame is less than the thickness of the lens rubber ring 23 in its natural state.

[0037] The first limiting structure 241 is provided with a countersunk hole 244; the pressure frame screw 27 passes through the countersunk hole 244 and is threadedly connected to the pressure frame fixing hole 112.

[0038] like Figure 8 As shown, the cable 3 is an electrical connection wire, one end of which is provided with a thread 31 and a rubber ring compression structure 32; the threaded end of the cable 3 is connected to the cable hole 111; the rubber ring compression structure 32 compresses the cable rubber ring 33 to achieve a seal at the joint between the heat sink 1 and the cable 3; the other end of the cable 3 is provided with a standard interface 34 for connecting to a standard power supply; the two wires in the cable 3 pass through the clearance groove 222 on the lens 22 and are electrically connected to the positive electrode pad 213 and the negative electrode pad 214 respectively.

Claims

1. An easily sealed LED lighting module, comprising a heat sink (1), a light source assembly (2), and a cable (3); the light source assembly is mounted and fixed on the upper surface of the light source fixing plate of the heat sink, and the cable is connected to the light source in the light source assembly; characterized in that... The light source (21) in the light source assembly adopts a single COB point light source, which is fixed on the light source fixing plate and a phase change interface material (26) is provided between the two.

2. The LED lighting module with ease of sealing according to claim 1, characterized in that The COB point light source includes a substrate (211) and an LED chip (212) attached to the substrate; the positive electrode pad (213) and the negative electrode pad (214) on the substrate are disposed on the same side of the substrate near the cable.

3. The LED lighting module with ease of sealing according to claim 2, characterized in that The substrate is square, and the positive electrode pad and the negative electrode pad are located on the substrate near the same side.

4. The LED lighting module that facilitates sealing of claim 1, wherein In the heat sink, each heat dissipation fin (12) arranged horizontally and parallel to each other is perpendicular to the light source fixing plate (11) and integrally connected to the lower surface of the light source fixing plate.

5. The LED lighting module that facilitates sealing of claim 1, wherein The light source assembly also includes a lens (22), a lens rubber ring (23), and a protective pressure frame (24); the lens covers the light source, and its sealing flange (221) is nested in the rectangular sealing groove (231) inside the lens rubber ring; the protective pressure frame presses the lens rubber ring and is fixedly connected to the light source fixing plate.

6. The LED lighting module with ease of sealing of claim 5, wherein The lens is made of a single piece of glass.

7. The LED lighting module that facilitates sealing of claim 5, wherein The lens is provided with a clearance groove (222).

8. The LED lighting module that facilitates sealing of claim 5, wherein The perimeter of both the sealing flange and the rectangular sealing groove is 250-350mm.

9. The LED lighting module that facilitates sealing of claim 5, wherein The protective pressure frame is a concave frame structure. A first limiting structure (241) is set at the four corners of the concave frame, the four side edges serve as a second limiting structure (242), and the top surface of the concave frame serves as a top protective structure (243).

10. The LED lighting module that facilitates sealing of claim 7, wherein The cable has one end sealed to the cable hole (111) on the light source fixing plate; the other end is provided with a standard interface (34) for connecting to a standard power supply; the two wires in the cable pass through the clearance groove on the lens and are electrically connected to the positive electrode pad and the negative electrode pad respectively.

Images