Light-emitting module based on groove interference structure

Abstract

The utility model discloses a light-emitting module based on a groove interference structure. The light-emitting module comprises a lens plate, a light-emitting plate and a radiator. An insertion fastening structure is arranged on the inner side surface of the lens plate; and the radiator is provided with a slot. The plug-in fastening structure comprises one or a plurality of fasteners which are sequentially arranged at intervals; and the fasteners are inserted into the corresponding slots on the radiator. At least one side wall of each fastener is provided with a groove; and a bulge matched with the groove is arranged on at least one side wall of the slot. And the bulges are clamped into the corresponding grooves. According to the utility model, the side wall of the fastener is provided with the groove, and the groove wall of the slot is provided with the bulge; and after the fastener is inserted into the slot, the bulge is clamped into the groove. When the fastener tends to be separated from the inserting groove, the protrusion and the groove are matched to effectively form obstruction, and the fastener is prevented from being separated from the inserting groove.

Description

Technical Field

[0001] This utility model belongs to the field of light-emitting device technology, specifically relating to a light-emitting module based on a groove interference structure. Background Technology

[0002] Light-emitting modules are key components widely used in electronic devices such as LED lighting fixtures. However, with the increase in module power, heat dissipation has become an increasingly significant problem. Currently, cast heat sinks are generally used to improve the heat dissipation performance of light-emitting modules. However, due to the draft angle of the fins in cast heat sinks, the fin length is relatively small and the fin spacing is relatively large, which cannot effectively increase the heat dissipation area and limits the improvement of heat dissipation effect.

[0003] Compared to cast heat sinks commonly used in lighting modules, profile heat sinks do not have draft angles, allowing for longer and more closely spaced fins, thus effectively improving heat dissipation performance. However, due to manufacturing limitations, profile heat sinks cannot be made with annular groove structures, making it difficult to ensure a proper seal between the heat sink and the lens.

[0004] Application number "2023210129263" proposes a light-emitting module based on a profile heat sink, which includes a plug-in fastening structure on the lens to achieve interference fit between the lens and the heat sink through a slot on the profile heat sink. However, this plug-in fastening structure still carries the risk of detachment. Summary of the Invention

[0005] The purpose of this invention is to provide a light-emitting module based on a groove interference structure.

[0006] This utility model provides a light-emitting module based on a groove interference structure, comprising a lens plate, a light-emitting plate, and a heat sink. The light-emitting plate is located between the lens plate and the heat sink. One or more insertion fastening structures are provided on the inner side of the lens plate; the heat sink has slots corresponding to the insertion fastening structures. Each insertion fastening structure includes one or more fasteners arranged at intervals; the fasteners are inserted into the corresponding slots on the heat sink. At least one sidewall of each fastener has a groove; at least one sidewall of each slot has a protrusion that matches the groove. The protrusion engages in the corresponding groove.

[0007] Preferably, all fasteners have grooves on both sides of their side walls; and the slots have protrusions on both sides of their side walls.

[0008] Preferably, the fastener has a groove on only one side wall; the slot has a protrusion on only the side wall corresponding to the groove. The bottom of the side wall of the fastener without a groove has a concave first chamfer structure; the bottom of the side wall of the slot without a groove has a second chamfer structure. The shapes of the first chamfer structure and the second chamfer structure match each other.

[0009] Preferably, both the first chamfer structure and the second chamfer structure are inclined plane structures.

[0010] Preferably, the longitudinal section of the protrusion on the slot wall is arc-shaped.

[0011] Preferably, the lens plate has a recessed stepped groove at the outer periphery of its bottom surface.

[0012] Preferably, the plug-in fastening structure includes at least two fasteners; the two fasteners arranged at both ends of the same plug-in fastening structure are located at the two side edges of the bottom surface of the lens plate.

[0013] Preferably, the bottom of each fastener is provided with a slot; on two fasteners arranged at both ends in the same plug-in fastening structure, the end of the slot near the middle position of the lens plate is open, and the end near the middle position of the back lens plate is closed. On the other fasteners, both the left and right ends of the slot are open.

[0014] Preferably, the lens plate includes a lens body and an annular structure. The annular structure surrounds the lens body and is spaced apart from the outer peripheral edge of the lens body. The annular structure is connected to the lens body via a connector. The inner peripheral edge of the annular structure, the outer peripheral edge of the lens body, and the mounting surface of the heat sink together form an annular groove; a sealant is provided in the annular groove to enter the slot. In the same insertion fastening structure, two fasteners arranged at both ends are connected to the annular structure; the remaining fasteners are all connected to the lens body.

[0015] Preferably, the heat sink is made of aluminum alloy profile; the slot is a slot structure with open ends.

[0016] Preferably, the initial width of the middle position of the slot on the fastener, before the top of the slot extends, is greater than the width of the corresponding position in the middle of the slot.

[0017] The beneficial effects of this utility model are:

[0018] This invention features a groove on the side wall of the fastener and a protrusion on the wall of the slot. When the fastener is inserted into the slot, the protrusion engages with the groove. If the fastener tends to come out of the slot, the engagement of the protrusion and the groove effectively prevents it from slipping out.

[0019] This invention features a recessed, circumferential stepped groove at the bottom edge of the lens plate. This groove creates a gap between the lens plate edge and the heat sink, minimizing the unevenness caused by machining errors between the outer wall of the annular structure and the outer wall of the heat sink. This improves the production consistency and aesthetics of the light-emitting module, while reducing the precision requirements for its machining.

[0020] This invention features a first chamfered structure at the bottom of the side wall of the fastener without a groove, and a corresponding second chamfered structure at the bottom of the slot. During the insertion of the fastener into the groove, the first chamfered structure helps provide clearance when the fastener bends and deforms, allowing for smooth insertion. After the fastener is fully inserted into the groove, the first and second chamfered structures fit together to form a seal.

[0021] This invention designs the slot at the end of the fastener in the same plug-in fastening structure as a partially closed structure, which effectively prevents glue from flowing out of the slot. At the same time, because the width of the closed structure is small, the closing block can still be deformed and inserted into the slot.

[0022] This invention can create a waist-shaped structure with a narrow middle and wide ends by providing grooves on both sides of the fastener, making the connection between the fastener and the slot more secure.

[0023] This invention features a slot at the bottom of the fastener. During insertion into the slot, the bottom sides of the fastener are compressed and deformed towards the slot by the protrusions on the slot wall, facilitating the insertion of the fastener and the sealing block. Furthermore, the protrusions on the slot wall are designed as arc-shaped, which further aids in the smooth insertion of the fastener into the slot. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model.

[0025] Figure 2 This is a schematic diagram of the lens plate in Embodiment 1 of this utility model.

[0026] Figure 3 This is a schematic diagram of the fastener structure in Embodiment 1 of this utility model (i.e.) Figure 2 (A magnified view of part A in the middle).

[0027] Figure 4 This is a schematic diagram of the radiator structure in Embodiment 1 of this utility model.

[0028] Figure 5 This is a three-dimensional cross-sectional view of Embodiment 1 of the present invention.

[0029] Figure 6This is a schematic diagram of the connection between the fastener and the slot in Embodiment 1 of this utility model (i.e.) Figure 5 (A magnified view of part B in the middle section).

[0030] Figure 7 This is a schematic diagram of the position of the stepped groove in Embodiment 1 of this utility model (i.e.) Figure 5 (A magnified view of part C in the middle).

[0031] Figure 8 This is a schematic diagram of the connection between the fastener and the slot in Embodiment 2 of this utility model.

[0032] Reference numerals: 1. Lens plate; 11. Lens body; 12. Annular structure; 13. Connector; 14. Step groove; 2. Heat sink; 21. Slot; 22. Protrusion; 23. Second chamfer structure; 3. Fastener; 31. Groove; 32. Recess; 33. First chamfer structure; 4. Annular groove. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings.

[0034] In the following embodiments, the direction from lens plate 1 to heat sink 2 is taken as the top-to-bottom direction. The top, top, and bottom surfaces of the structure represent the uppermost position of the structure; the bottom, bottom, and bottom surfaces of the structure represent the lowermost position of the structure; the arrangement direction of the heat dissipation fins in the heat sink 2 is taken as the front-to-back direction; and the lateral extension direction of the heat dissipation fins in the heat sink 2 is taken as the left-to-right direction.

[0035] Example 1

[0036] like Figure 1 As shown, a light-emitting module based on a groove interference structure includes a lens plate 1, a light-emitting plate, and a heat sink 2. The light-emitting plate is clamped and fixed between the mounting surfaces of the lens plate 1 and the heat sink 2. LED beads for emitting light are mounted on the light-emitting plate.

[0037] In this embodiment, the arrangement direction of the heat dissipation fins in the heat sink 2 is the same as the arrangement direction between the two width sides of the heat sink 2; the lateral extension direction of the heat dissipation fins in the heat sink 2 is the same as the arrangement direction between the two length sides of the heat sink 2.

[0038] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the inner surface of the lens plate 1 is provided with multiple insertion and fastening structures; these structures are arranged sequentially at intervals along the front-to-back direction. The mounting surface of the heat sink 2 is provided with multiple slots 21 corresponding to the insertion and fastening structures. The slots 21 extend along the left-right width direction of the heat sink 2 and penetrate the left and right edges of the heat sink 2, forming a groove structure open at both ends. The light-emitting plate is provided with a clearance slot structure matching the insertion and fastening structures to prevent the insertion and fastening structures from being blocked by the light-emitting plate.

[0039] The insertion fastening structure includes multiple fasteners 3 arranged at intervals along the left-right direction (i.e., the width direction of the lens plate); the two fasteners 3 arranged at both ends of the same insertion fastening structure are located at the left and right edges of the bottom surface of the lens plate 1, respectively. All fasteners are inserted into the corresponding slots 21 on the heat sink and form an interference fit.

[0040] like Figure 2 and Figure 3 As shown, all fasteners 3 are concave on both sides, with inwardly recessed grooves 32 on both the front and rear side walls; the grooves 32 penetrate through both ends of the fastener 3. The front and rear side walls of the slot 21 are provided with protrusions 22 that match the grooves 32. The protrusions 22 are continuous elongated strips, extending to the left and right sides of the heat sink 2 at both ends. The outward protrusion height of the protrusions 22 is 0.3mm to 0.4mm.

[0041] like Figure 3 and Figure 6 As shown, each fastener 3 has a slot 31 at its bottom; the slot 31 extends from the bottom (specifically, the end away from the main body of the lens plate 1) of the fastener 3 to the top. The two fasteners 3 arranged at both ends of the same insertion fastening structure also serve to close the slot; therefore, on the two fasteners 3 arranged at both ends, the ends of the slot 31 near the middle of the lens plate 1 are open, while the ends away from the middle of the lens plate 1 are closed. On the other fasteners 3, both ends of the slot 31 are open.

[0042] During the insertion of the fastener into the slot, the front and rear sides of the bottom of the fastener 3 are squeezed by the protrusions 22 on the two sides of the slot 21 and deformed and contracted towards the slot 31. After insertion, the bottom of the fastener 3 rebounds to the sides and resets due to the restoring force generated by its own elastic deformation, so that the protrusions 22 on the two sides of the slot 21 respectively engage with the grooves 32 on the front and rear sides of the fastener 3.

[0043] When the light-emitting module is subjected to a force that causes the lens plate 1 and the heat sink 2 to separate from each other, the fastener 3 tends to come out of the slot 21. The engagement of the protrusion 22 and the groove 32 will form an obstacle to prevent the fastener 3 from coming out of the slot 21.

[0044] In some embodiments, the initial bottom width of the fastener 3 is greater than the bottom width of the slot 21, so that the bottom of the fastener 3 and the bottom of the slot 21 form an interference fit.

[0045] In some embodiments, the initial width of the middle position of the slot 31 on the fastener 3, before the top end extends, is greater than the width of the corresponding position in the middle of the slot 21, so that the middle part of the fastener 3 and the middle part of the slot 21 form an interference fit. At this position, the fastener 3 cannot be deformed inward by utilizing the presence of the slot 31, but can only narrow by its own elastic deformation, which can increase the interference locking force and ensure the stability of the interference connection between the lens plate and the heat sink.

[0046] In some embodiments, to facilitate the insertion of the fastener 3 into the slot 21, the longitudinal section of the protrusion 22 on the slot wall of the slot 21 is arc-shaped. The top edge of the slot 21 is provided with an arc-shaped chamfer.

[0047] In some embodiments, the lens plate 1 includes a lens body 11 and an annular structure 12. The annular structure 12 surrounds the lens body 11 and is spaced apart from the outer peripheral edge of the lens body 11. The inner peripheral edge of the annular structure 12 is connected to the outer peripheral edge of the lens body 11 by a connector 13. In the same insertion fastening structure, two fasteners 3 arranged at both ends are respectively connected to the two length sides of the annular structure 12; the remaining fasteners 3 are all connected to the lens body 11. The connector 13 is integrally formed between the fasteners 3 arranged at the ends and their adjacent fasteners 3, so that the lens body 11, the annular structure 12 and the insertion fastening structure form an integrally formed structure.

[0048] After the lens plate 1 and the heat sink 2 are assembled by insertion, the inner peripheral edge of the annular structure 12, the outer peripheral edge of the lens body 11, and the mounting surface of the heat sink together form an annular groove 4 with a U-shaped cross-section. Sealant is injected into the annular groove 4, and while filling the annular groove 4, the sealant flows into the slot 21, sealing the mating area between the fastener 3 and the slot 21. The outer sealing structure of the groove between the fasteners 3 at the ends prevents adhesive from flowing outside the slot 21; at the same time, the width of this sealing structure is small, so the fasteners 3 at the ends can deform and be inserted into the slot 21.

[0049] In some further embodiments, such as Figure 2 and Figure 7As shown, the outer periphery of the bottom surface of the annular structure 12 is provided with a recessed stepped groove 14. It is easy to understand that if the outer periphery of the bottom surface of the annular structure 12 is directly attached to the mounting surface of the heat sink 2, then any slight protrusion or depression at the edge of the mounting surface of the annular structure 12 and the heat sink 2 will be very noticeable and unsightly. However, because the recessed stepped groove 14 provided in this embodiment allows the inner part of the bottom surface of the annular structure 12 to be tightly attached to the mounting surface of the heat sink 2, and all positions of the outer periphery of the bottom surface of the annular structure 12 to form a uniform gap with the edge of the heat sink 2; at this time, the local width variation of the gap caused by the processing error of the annular structure 12 is difficult to detect with the naked eye, resulting in a more consistent and aesthetically pleasing production of the light-emitting module.

[0050] In some embodiments, the radiator 2 is a profile obtained by aluminum alloy extrusion molding.

[0051] In some embodiments, the light-emitting board includes a PCB board and a plurality of LED chips distributed on the PCB board. A plurality of lens units are integrally formed on the lens plate 1. The position of each lens unit corresponds to the position of each LED chip on the light-emitting board, and is used to distribute the light emitted by the LED chips. The mounting surface of the heat sink 2 is attached to the light-emitting board; the power supply line of the light-emitting board is led out through the wire hole in the middle of the heat sink 2.

[0052] Example 2

[0053] like Figure 1 As shown, a light-emitting module based on a groove interference structure is presented. The difference between this embodiment and embodiment 1 is that the fastener 3 and the slot 21 have different structures.

[0054] In this embodiment, the fastener 3 has a groove 32 on only one side wall; the slot 21 has a protrusion 22 on only one side wall corresponding to the groove 32.

[0055] Example 3

[0056] A light-emitting module based on a groove interference structure, the difference between this embodiment and embodiment 2 is that the fastener 3 and the slot 21 have different structures.

[0057] like Figure 8 As shown in this embodiment, in the front and rear side walls of the fastener 3, the side wall with the groove 32 is called the first snap-fit ​​side, and the side wall without the groove 32 is called the clearance side; in the two slot walls of the slot 21, the slot wall with the protrusion 22 is called the second snap-fit ​​side, and the side wall without the groove 32 is called the compensation side.

[0058] The bottom of the fastener 3 on the clearance side is provided with a concave first chamfer structure 34; the bottom of the slot 21 on the compensation side is provided with a second chamfer structure 23. The shapes of the first chamfer structure 34 and the second chamfer structure 23 match each other; after the fastener 3 is fully inserted into the corresponding slot, the first chamfer structure 34 and the second chamfer structure 23 fit together to avoid forming a sealing structure with excessive gaps.

[0059] In this embodiment, both the first chamfer structure 34 and the second chamfer structure 23 are inclined plane structures; in other embodiments, the first chamfer structure 34 and the second chamfer structure 23 may also be curved surface structures.

[0060] During the process of fastener 3 being inserted into groove 32, the bottom of the first snap-fit ​​side of fastener 3 contacts the protrusion 22 on the second snap-fit ​​side of slot 21, causing fastener 3 to bend and deform; the first chamfer structure 34 of the recessed side of fastener 3 forms a clearance, allowing fastener 3 to bend and deform smoothly and be inserted into slot 21.

Claims

1. A light-emitting module based on a groove interference structure, comprising a lens plate (1), a light-emitting plate, and a heat sink (2); the light-emitting plate is located between the lens plate (1) and the heat sink (2); the inner side of the lens plate (1) is provided with one or more insertion fastening structures; the heat sink (2) is provided with slots (21) corresponding one-to-one with the insertion fastening structures; the insertion fastening structure comprises one or more fasteners (3) arranged sequentially at intervals; the fasteners are inserted into the corresponding slots (21) on the heat sink; characterized in that: At least one sidewall of all fasteners (3) is provided with a groove (32); at least one sidewall of the slot (21) is provided with a protrusion (22) that matches the groove (32); the protrusion (22) is engaged in the corresponding groove (32).

2. The light-emitting module based on a groove interference structure according to claim 1, characterized in that: All fasteners (3) have grooves (32) on both sides of their side walls; the slots (21) have protrusions (22) on both sides of their side walls.

3. A light-emitting module based on a groove interference structure according to claim 1, characterized in that: The fastener (3) has a groove (32) on only one side wall; the slot (21) has a protrusion (22) on only the side wall corresponding to the groove (32); the fastener (3) without the groove (32) has a concave first chamfer structure (34) at the bottom of the side wall; the slot (21) without the groove (32) has a second chamfer structure (23) at the bottom of the side wall; the shapes of the first chamfer structure (34) and the second chamfer structure (23) match each other.

4. A light-emitting module based on a groove interference structure according to claim 3, characterized in that: Both the first chamfer structure (34) and the second chamfer structure (23) are inclined plane structures.

5. A light-emitting module based on a groove interference structure according to claim 1, characterized in that: The longitudinal section of the protrusion (22) on the slot wall of the slot (21) is arc-shaped.

6. A light-emitting module based on a groove interference structure according to claim 1, characterized in that: The lens plate (1) has a recessed stepped groove (14) at the outer periphery of the bottom surface.

7. A light-emitting module based on a groove interference structure according to claim 1, characterized in that: The plug-in fastening structure includes at least two fasteners (3); the two fasteners (3) arranged at both ends in the same plug-in fastening structure are located at the two sides of the bottom surface of the lens plate (1).

8. A light-emitting module based on a groove interference structure according to claim 7, characterized in that: The bottom of each fastener (3) is provided with a slot (31); on the two fasteners (3) arranged at both ends in the same plug-in fastening structure, the end of the slot (31) near the middle position of the lens plate (1) is open, and the end of the back lens plate (1) is closed; on the other fasteners (3), the left and right ends of the slot (31) are both open.

9. A light-emitting module based on a groove interference structure according to claim 7, characterized in that: The lens plate (1) includes a lens body (11) and an annular structure (12); the annular structure (12) surrounds the lens body (11) and is spaced apart from the outer peripheral edge of the lens body (11); the annular structure (12) and the lens body (11) are connected by a connector (13); the inner peripheral edge of the annular structure (12), the outer peripheral edge of the lens body (11), and the mounting surface of the heat sink form an annular groove (4); the annular groove (4) is provided with sealant for entering the slot (21); in the same plug-in fastening structure, two fasteners (3) arranged at both ends are connected to the annular structure (12); the remaining fasteners (3) are all connected to the lens body (11).

10. A light-emitting module based on a groove interference structure according to claim 1, characterized in that: The heat sink (2) is made of aluminum alloy profile; the slot (21) is a slot structure with open ends.

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