An LED module fixed by adhesive

Abstract

The utility model provides a kind of LED module of rubber bonding, including rear cover, bottom shell and lamp panel, bottom shell is set between rear cover and lamp panel, bottom shell is frame type, is equipped with multiple ribbons, multiple windows are set in the side of ribbons and pass through bottom shell, window is used to accommodate the component of lamp panel;Rear cover is connected by buckling between bottom shell;Bottom shell and lamp panel are connected by high-temperature-resistant insulating heat-conducting double-sided adhesive and are bonded.Through the cooperation of frame type bottom shell and high-temperature-resistant insulating heat-conducting double-sided adhesive, screwless fixing is realized, the problems of low efficiency and difficult maintenance of traditional screw assembly are solved, and the stability of the assembly is enhanced by the buckling structure, which has the advantages of improving production efficiency, facilitating maintenance and repair, and enhancing structural stability.

Description

Technical Field

[0001] This utility model relates to the field of LED lighting equipment technology, and more specifically, to an LED module fixed with adhesive. Background Technology

[0002] Currently, LED module assembly commonly uses screw fastening, a method with several technical drawbacks. First, it requires multiple screw-fastening machines operating simultaneously, extending production time per unit and severely impacting efficiency. Second, maintenance requires operators to remove each screw individually, a time-consuming and labor-intensive process that easily strips screw threads, significantly affecting maintainability and lifespan. Furthermore, the base shells of existing LED modules are often made of thermoplastic, which expands and contracts significantly with temperature changes, altering the overall module dimensions and directly affecting installation accuracy and operational stability. More importantly, removing the chips beneath the base shell during disassembly carries the risk of damaging delicate components. These technical shortcomings severely restrict the production efficiency and reliability of LED module products.

[0003] In view of this, the applicant hereby submits this application after studying the existing technology. Utility Model Content

[0004] This invention provides an LED module fixed with adhesive, which aims to improve at least one of the above-mentioned technical problems.

[0005] To solve the above-mentioned technical problems, this utility model provides an LED module fixed by adhesive, including a back cover, a bottom shell, and a lamp board. The bottom shell is disposed between the back cover and the lamp board. The bottom shell is frame-shaped and has multiple ribs inside. One side of each rib has multiple windows that penetrate through the bottom shell. The windows are used to accommodate the components of the lamp board. The back cover and the bottom shell are connected by a snap-fit ​​connection. The bottom shell and the lamp board are bonded together by high-temperature resistant, insulating, and thermally conductive double-sided adhesive.

[0006] As a further optimization, the bottom shell is provided with a first bonding part located on the outer periphery of the bottom shell and a second bonding part located on the rib on the side near the lamp plate, and the high temperature resistant insulating and thermally conductive double-sided adhesive is respectively provided on the first bonding part and the second bonding part.

[0007] As a further optimization, the bottom shell is integrally molded from thermoplastic plastic.

[0008] As a further optimization, the upper side of the bottom shell away from the back cover is provided with a first fastening groove, and the lower side is provided with a second fastening groove; the upper side of the back cover is provided with a first fastening part, and the lower side is provided with a second fastening part, the first fastening part matches the first fastening groove, and the second fastening part matches the second fastening groove; the first fastening part is an elastic fastening structure.

[0009] As a further optimization, the inner wall of the bottom shell below the first fastening groove is inclined.

[0010] As a further optimization, the side of the bottom shell near the rear cover is recessed to form a mounting groove, and the rear cover is adapted to be embedded in the mounting groove.

[0011] As a further optimization, the outer periphery of the back cover is provided with multiple U-shaped grooves; the bottom shell is provided with protrusions corresponding to the U-shaped grooves, and when the back cover is embedded in the mounting groove, the protrusions can extend into the U-shaped grooves.

[0012] By adopting the above technical solution, the present invention can achieve the following technical effects: This application provides an LED module that is fixed with adhesive. By using a frame-type base shell and high-temperature resistant, insulating, and thermally conductive double-sided adhesive, screwless fixing is achieved, which solves the problems of low efficiency and difficult maintenance of traditional screw assembly. At the same time, the fastening structure enhances the stability of the component, and has the advantages of improving production efficiency, facilitating maintenance and repair, and enhancing structural stability. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is an exploded structural diagram of an LED module fixed with adhesive according to the present invention; Figure 2 This is a schematic diagram of the upper structure of the bottom shell of this utility model; Figure 3 This is a schematic diagram of the lower end structure of the bottom shell of this utility model; Figure 4 This is a schematic diagram of the back structure of an LED module that is fixed with adhesive according to this utility model; Figure 5 This is a schematic diagram of the structure of the first fastening part of this utility model; Figure 6 This is a schematic diagram of the structure of the second fastening part of this utility model; The markings in the diagram are: 1. Back cover; 2. Bottom shell; 3. Light panel; 4. Rib; 5. Window; 6. Components; 7. High-temperature resistant, insulating, and thermally conductive double-sided adhesive; 8. First bonding part; 9. Second bonding part; 10. First snap-fit ​​groove; 11. Second snap-fit ​​groove; 12. First snap-fit ​​part; 13. Second snap-fit ​​part; 14. Mounting groove; 15. U-shaped groove; 16. Protrusion. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] Depend on Figures 1 to 3 As shown in the figure, this utility model embodiment provides an LED module fixed with adhesive.

[0017] In existing technologies, LED modules are generally connected to the base shell 2 and the lamp board 3 by screws. The production process requires multiple screw-fixing machines to work together, resulting in low efficiency. During maintenance, manual disassembly of screws is prone to stripping. The material of the base shell 2 is affected by temperature, causing thermal expansion and contraction, which leads to insufficient dimensional stability of the module installation and affects assembly accuracy.

[0018] To address these issues, researchers discovered that traditional screw fastening methods suffer from complex processes and stress concentration problems. They attempted to eliminate the use of mechanical fasteners through innovative connection structures. Based on the deformation characteristics of thermoplastics, an elastic connection method was considered to compensate for thermal deformation, while also taking into account heat dissipation and electrical insulation requirements. Through multiple experiments, it was found that continuous adhesive bonding can evenly distribute thermal stress, and combined with a snap-fit ​​structure, it enables rapid assembly and disassembly.

[0019] Therefore, this application proposes an LED module including a back cover 1, a bottom shell 2 and a lamp board 3. The bottom shell 2 is disposed between the back cover 1 and the lamp board 3. The frame-type bottom shell 2 is provided with multiple ribs 4 inside. A window 5 is opened through one side of the ribs 4 to accommodate the components 6 on the lamp board 3. The back cover 1 and the bottom shell 2 are connected by a snap-fit ​​structure. The bottom shell 2 and the lamp board 3 are bonded and fixed by high-temperature resistant insulating and thermally conductive double-sided adhesive 7.

[0020] The frame-type base shell 2 refers to a shell with an outer frame and an internal support structure, which can be manufactured using injection molding. The frame and ribs 4 form a three-dimensional support system. The window 5 refers to a hollowed-out area penetrating the base shell 2, which can be designed as a rectangular or circular opening to accommodate and accommodate components 6 on the light panel 3. The snap-fit ​​connection refers to a mechanical connection achieved through the cooperation of elastic clips and slots, which can be achieved using a hook-type structure for quick locking and unlocking. The high-temperature resistant, insulating, and thermally conductive double-sided adhesive 7 refers to an adhesive material with temperature resistance, electrical insulation, and thermal conductivity. It can be a silicone-based composite ceramic filler film that maintains bonding strength and conducts heat under high-temperature conditions.

[0021] Specifically, the frame-type base shell 2 forms a grid-like support structure through ribs 4, reducing overall weight while ensuring structural strength. The window 5 design allows components 6 to be embedded inside the base shell 2 during lamp panel 3 installation, optimizing space utilization. The snap-fit ​​structure enables tool-free assembly and disassembly of the back cover 1 and the base shell 2, eliminating the need for screw tightening. Double-sided adhesive forms a continuous bonding layer between the base shell 2 and the lamp panel 3, absorbing dimensional changes caused by thermal expansion and contraction through the elastic deformation of the adhesive, while simultaneously establishing a heat conduction channel to transfer heat from the lamp panel 3 to the base shell 2. The coordinated action of all components forms an integrated assembly structure, ensuring mechanical stability while improving production efficiency and ease of maintenance.

[0022] Compared to existing technologies, traditional solutions rely on multi-point screw fixing, resulting in time-consuming processes and the risk of stripped threads. This solution achieves rapid assembly through a composite connection method combining snap-fit ​​and adhesive bonding. In existing technologies, discrete screw fixing points easily form stress concentration areas; this solution uses a continuous adhesive layer to evenly distribute thermal stress. Regarding the issue of thermal expansion and contraction, existing structures lack effective compensation measures; this solution achieves dimensional self-adjustment through elastic colloidal deformation and frame structure design.

[0023] Through the above technical solutions, this application achieves screwless assembly of LED modules, simplifying the production process and improving assembly efficiency. During maintenance, components can be quickly separated via a snap-fit ​​structure, avoiding structural damage caused by tooling. The elastic properties of the double-sided adhesive effectively compensate for material thermal deformation, ensuring the dimensional stability of the module under different temperature environments. The continuous adhesive layer establishes an effective heat dissipation path while ensuring bonding strength, improving the overall reliability of the module.

[0024] like Figure 2 In the shaded area, this application further proposes that the bottom shell 2 is provided with a first bonding part 8 located on the outer periphery of the bottom shell 2 and a second bonding part 9 located on the rib 4 on the side near the lamp plate 3, and high temperature resistant insulating and thermally conductive double-sided adhesive 7 is respectively provided on the first bonding part 8 and the second bonding part 9.

[0025] The first bonding part 8 refers to the annular adhesive surface formed on the edge of the bottom shell 2, which can be implemented using a planar structure with a width of 1-2 cm, used to support the annular tape to achieve sealing and fixing of the edge of the lamp panel 3. The second bonding part 9 refers to the discrete adhesive areas distributed on the top of the ribs 4, which disperse thermal stress through multi-point support. The high-temperature resistant insulating and thermally conductive double-sided adhesive 7 refers to a silicon-based composite material with a working temperature range of -40℃ to 150℃, which can be implemented using a release paper film with a thickness of 0.1-0.3 mm, with a thermal conductivity greater than 1.5 W / m·K and a volume resistivity exceeding 1×10^12 Ω·cm.

[0026] Specifically, when the lamp panel 3 is assembled with the base shell 2, the annularly distributed first bonding portion 8 forms an adhesive band through the adhesive layer, effectively constraining the thermal expansion deformation of the outer periphery of the base shell 2. The second bonding portion 9 at the top of the rib 4 has adhesive joints spaced at intervals of 2-5mm, allowing controllable thermal expansion displacement in the central area of ​​the base shell 2 while maintaining the rigidity of the frame structure. The combined layout of the two types of bonding portions forms a grid-like support system in the adhesive layer, which absorbs the thermal expansion difference between the base shell 2 and the lamp panel 3 through the elastic deformation of the adhesive itself under high temperature conditions, avoiding adhesive layer tearing caused by concentrated stress.

[0027] Compared to existing technologies, traditional screw fastening methods require densely packed screw holes on the base shell 2 and the use of metal fasteners, which not only increases the number of parts but also easily leads to stripping of the plastic screw holes. This solution replaces mechanical fastening with adhesive bonding, eliminating the screw assembly process and reducing the production cycle time by more than 30%. Regarding thermal deformation control, existing technologies often suffer from interfacial shear failure due to the difference in thermal expansion coefficients between the base shell 2 and the light panel 3 in integral adhesive layers. This solution's partitioned adhesive bonding design decomposes the integral adhesive layer into a combination of edge constraint zones and a central buffer zone, effectively releasing thermal stress within the elastic range of the adhesive layer.

[0028] Through the above technical solution, this application achieves screwless rapid assembly of the lamp board 3 and the base shell 2, eliminating the maintenance difficulties caused by stripped screws in traditional assembly. Under high-temperature operating conditions, the dual-zone adhesive structure maintains the integrity of the bonding interface through differentiated stress distribution, ensuring the continuous stability of the heat dissipation path of the lamp board 3. During maintenance, the adhesive layer can be completely peeled off to replace the lamp board 3, avoiding the complexity of disassembling screws one by one in traditional solutions.

[0029] This application further proposes that the bottom shell 2 is integrally molded from thermoplastic plastic.

[0030] Thermoplastic plastics refer to polymeric materials that soften upon heating and harden upon cooling. Specifically, they can be made from polycarbonate or polyamide. When heated, the intermolecular forces weaken, allowing for repeated melting and reshaping. This characteristic enables the material to form a seamless, integral structure during processing, eliminating the risk of deformation at the seams of traditionally pieced-together base shells 2. One-piece molding refers to injecting molten thermoplastic plastic into a mold cavity using an injection molding process, followed by cooling and solidification to form a complete base shell 2 structure. This can be achieved using a single-injection molding process. This process creates a continuous and uniform frame structure for the base shell 2, avoiding seams caused by assembling multiple components, thereby evenly distributing internal stresses generated by temperature changes.

[0031] Specifically, the melting characteristics of thermoplastics synergistically work with the one-piece molding process. During injection molding, molten material flows and fills the mold to form a seamless rib 4 and window 5 structure, which, upon cooling, forms a rigid frame. This seamless frame has a uniform distribution of thermal expansion coefficients, allowing it to expand or contract synchronously with temperature changes, avoiding dimensional shifts caused by localized deformation differences. The continuous structure of the rib 4 and the base shell 2 further enhances resistance to deformation, ensuring the geometry of the mounting interface remains stable under high or low temperature conditions.

[0032] Compared with existing technologies, traditional bottom shells 2 are assembled from multiple parts or made of non-thermoplastic materials, and misalignment deformation is prone to occur at the joints due to differences in the coefficients of thermal expansion of the materials. In contrast, this solution combines material selection and processing technology to form a seamless integral structure, fundamentally eliminating the source of deformation at the joints and ensuring that the bottom shell 2 maintains overall dimensional consistency when the temperature changes.

[0033] Through the above technical solution, this application solves the problem of unstable installation dimensions of the LED module base shell 2 due to temperature changes. The base shell 2 can maintain structural integrity in high or low temperature environments, avoiding misalignment of the installation interface caused by local deformation, thereby ensuring the assembly accuracy of the module and external equipment and reducing the maintenance frequency caused by dimensional deviations.

[0034] This application further proposes that the bottom shell 2 is provided with a first fastening groove 10 on the upper side and a second fastening groove 11 on the lower side on the side away from the rear cover 1; the rear cover 1 is provided with a first fastening part 12 on the upper side and a second fastening part 13 on the lower side, the first fastening part 12 matches the first fastening groove 10, and the second fastening part 13 matches the second fastening groove 11; the first fastening part 12 is an elastic fastening structure.

[0035] The first snap-fit ​​groove 10 refers to a groove structure located on the upper edge of the bottom shell 2, which can be integrally molded using injection molding, and is used to form a mechanical interlock with the snap-fit ​​part of the back cover 1. The second snap-fit ​​groove 11 refers to a positioning groove located on the lower edge of the bottom shell 2, which can be implemented using a rectangular groove structure, and is used to limit the axial displacement of the back cover 1. The elastic snap-fit ​​structure refers to a snap-fit ​​component with deformation capability, which can be implemented using a cantilever beam structure made of polycarbonate material, and achieves detachable connection through elastic deformation. The inclined inner sidewall refers to the inclined surface structure with a slope of 5°-15° below the snap-fit ​​groove, which can be processed by mold forming process, and is used to guide the snap-fit ​​part to slide into the positioning.

[0036] The LED module can be configured with two sets of snap-fit ​​structures arranged symmetrically to enhance connection stability.

[0037] Specifically, during assembly, the rear cover 1 is pressed into the bottom shell 2 by the deformation of the elastic fastening structure. The cantilever beam of the first fastening part 12, after being compressed, recovers its deformation and engages with the first fastening groove 10, forming a movable connection interface. The second fastening part 13 is inserted into the second fastening groove 11 with a clearance fit, establishing an axial positioning reference. When the bottom shell 2 expands due to heat, the elastic fastening structure absorbs the dimensional changes through the bending deformation of the cantilever beam, preventing stress concentration at the connection point. During disassembly, the elastic fastening part is released by pressing it, allowing the rear cover 1 and bottom shell 2 to be separated without tools.

[0038] Compared to existing technologies, traditional screw fastening methods require tightening each screw individually and carry the risk of stripping during disassembly. This solution, however, achieves rapid assembly through an upper and lower interlocking structure, locking with a single press. Existing technologies suffer from screw hole misalignment due to thermal expansion and contraction, while this solution automatically compensates for dimensional changes through the elastic interlocking mechanism, maintaining connection stability. Current repair methods require disassembling each screw individually, while this solution allows for component separation simply by pressing the elastic component.

[0039] Through the above technical solution, this application achieves tool-free rapid assembly and disassembly of the LED module bottom shell 2 and back cover 1, eliminating the constraint of screw fastening process on production cycle. The elastic snap-fit ​​structure maintains connection reliability when the temperature changes, avoiding assembly size mismatch due to material expansion. The inclined inner wall design ensures accurate alignment of the snap-fit ​​part, reducing the difficulty of assembly operation.

[0040] This application further proposes that the inner wall of the bottom shell 2 below the first fastening groove 10 is inclined. The inclined inner wall below the first snap-fit ​​groove 10 refers to the non-vertical inclined structure formed on the inner wall of the bottom area of ​​the snap-fit ​​groove of the bottom shell 2. Specifically, this can be achieved by using injection molding to form an inclined surface with an angle of 5-15 degrees during the processing of the bottom shell 2. This inclined surface provides a sliding guide path for the elastic snap-fit ​​part of the rear cover 1 during assembly, and also compensates for the difference in linear expansion between the bottom shell 2 and the rear cover 1 when the temperature changes. Specifically, when the elastic fastening part of the back cover 1 contacts the bottom shell 2, the inclined inner wall forms a continuous guide surface, allowing the fastening part to slide into the fastening groove along the inclined trajectory. This inclined structure allows the deformation of the contact area between the fastening groove and the fastening part to be dispersed by the inclined angle when the bottom shell 2 expands due to heat, preventing the fastening part from getting stuck due to thermal deformation of the vertical wall. Under low-temperature shrinkage conditions, a progressive contact is formed between the inclined wall and the elastic fastening part, and the pre-tightening force of the fastening structure is maintained by the inclined support, preventing the structure from loosening due to gaps caused by material shrinkage.

[0041] Compared to existing technologies, traditional LED module bottom shell snap-fit ​​slots use a vertical wall structure, which can easily cause hard interference between the snap-fit ​​part and the slot wall during thermal expansion and contraction, requiring repeated adjustments to the alignment angle during assembly. This solution uses an inclined wall design to provide directional guidance for the snap-fit ​​part from the initial assembly stage, while utilizing the deformation adaptability of the inclined structure to eliminate dimensional deviations caused by temperature changes. Through the above technical solution, this application effectively solves the installation difficulty caused by material thermal expansion during the fastening assembly process, and realizes the adaptive adjustment of the fastening part under temperature change conditions. The guiding effect provided by the inclined wall reduces the difficulty of manual assembly, and its deformation compensation characteristics avoid the risk of damage to the fastening structure caused by stress concentration. At the same time, the inclined support structure enhances the mechanical stability of the fastening fit and prevents the fastening part from accidentally disengaging under vibration.

[0042] This application further proposes that the bottom shell 2 is recessed near the rear cover 1 to form a mounting groove 14, and the rear cover 1 is adapted to be embedded in the mounting groove 14.

[0043] The mounting groove 14 refers to the recessed area formed on the contact surface of the bottom shell 2 through a molding process. Specifically, it can be achieved by integral molding using an injection mold. The depth of the recess and the thickness of the back cover 1 form an interference fit, and the component is positioned through physical limiting. A stable assembly relationship is established through geometric shape matching.

[0044] The mounting groove 14 has a 5° inclined angle design on its side wall to guide the back cover 1 into place accurately during assembly.

[0045] Compared to existing technologies, traditional LED modules using screw fastening require threaded holes and individual tightening. This solution, however, achieves rapid assembly via mounting slot 14, eliminating the need for drilling and tapping. Furthermore, screw fastening in existing technologies is susceptible to failure due to thermal expansion and contraction of materials; this solution utilizes the space between the screw and the mounting slot to avoid assembly stress.

[0046] Through the above technical solution, this application achieves tool-less assembly of the LED module bottom shell 2 and back cover 1, reducing the screw fastening process in the production process, for example, shortening the assembly time of a single product by about 30 seconds. During maintenance, the components can be directly separated by applying force in a vertical direction, avoiding thread damage caused by traditional screw disassembly.

[0047] This application further proposes that the outer periphery of the back cover 1 is provided with a plurality of U-shaped grooves 15, and the bottom shell 2 is provided with protrusions 16 corresponding to the U-shaped grooves 15. When the back cover 1 is embedded in the mounting groove 14, the protrusions 16 can extend into the U-shaped grooves 15.

[0048] Among them, the U-shaped groove 15 refers to the open groove structure opened on the outer periphery of the back cover 1, which can be realized by stamping or injection molding process, and is used to guide the protrusion 16 to achieve positioning during the assembly process.

[0049] Compared to existing technologies, traditional LED modules require multiple steps to fix with screws, while this solution achieves single-press assembly through a snap-fit ​​connection. In existing technologies, screw holes are prone to deformation due to thermal expansion and contraction, while the elastic interlocking structure of this solution can adapt to temperature changes. Existing disassembly processes require removing each screw individually, while this solution allows for complete separation simply by using a tool to help the first snap-fit ​​part 12 disengage, significantly reducing the number of steps.

[0050] Through the above technical solutions, this application realizes tool-free rapid assembly of the back cover 1 and the bottom shell 2, reducing the investment in production equipment and the time spent on processes; during maintenance, disassembly can be completed manually, avoiding damage to components caused by stripped screws; the multi-point snap-fit ​​structure enhances the connection stability, enabling the module to maintain dimensional consistency under temperature change environments, ensuring installation reliability.

[0051] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An LED module fixed with adhesive, characterized in that, The device includes a back cover, a bottom shell, and a light panel. The bottom shell is disposed between the back cover and the light panel. The bottom shell is frame-shaped and has multiple ribs inside. One side of each rib has multiple windows that penetrate the bottom shell and are used to accommodate the components of the light panel. The back cover and the bottom shell are connected by a snap-fit ​​connection. The bottom shell and the light panel are bonded together with high-temperature resistant, insulating, and thermally conductive double-sided adhesive.

2. The LED module fixed with adhesive according to claim 1, characterized in that... The bottom shell has a first bonding part located on the outer periphery of the bottom shell and a second bonding part located on the rib on the side near the lamp plate. The high-temperature resistant, insulating, and thermally conductive double-sided adhesive is respectively disposed on the first bonding part and the second bonding part.

3. The LED module fixed with adhesive according to claim 1, characterized in that... The bottom shell is integrally molded from thermoplastic plastic.

4. The LED module fixed with adhesive according to claim 1, characterized in that... The bottom shell has a first fastening groove on its upper side and a second fastening groove on its lower side on the side away from the back cover; the back cover has a first fastening part on its upper side and a second fastening part on its lower side, the first fastening part matching the first fastening groove and the second fastening part matching the second fastening groove; the first fastening part is an elastic fastening structure.

5. An LED module fixed with adhesive according to claim 4, characterized in that... The bottom shell is inclined on the inner side wall below the first fastening groove.

6. The LED module fixed with adhesive according to claim 1, characterized in that... The bottom shell is recessed near the rear cover to form a mounting groove, and the rear cover is adapted to be embedded in the mounting groove.

7. An LED module fixed with adhesive according to claim 6, characterized in that... The outer periphery of the back cover is provided with multiple U-shaped grooves; the bottom shell is provided with protrusions corresponding to the U-shaped grooves, and when the back cover is embedded in the mounting groove, the protrusions can extend into the U-shaped grooves.

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