A light-emitting module based on a profile heat sink and a preparation method thereof

Abstract

The application discloses a light-emitting module based on a profile radiator and a preparation method thereof, which comprises a lens cover, a light-emitting plate and a radiator. N slots are arranged on the mounting surface of the radiator. The lens cover comprises a lens main body, an annular structure, a connecting section and n plug-in fastening structures. The plug-in parts in the n plug-in fastening structures are respectively inserted into the n slots on the radiator and form an interference fit. A sealing groove is formed between the inner side edge of the annular structure, the outer edge of the lens main body and the mounting surface of the radiator. The application arranges the slots penetrating through the two ends to the side surface of the radiator on the mounting surface of the radiator, and realizes the fixation of the lens cover and the radiator by using the plug-in parts on the lens cover. Meanwhile, the lens cover is divided into the lens main body and the annular structure with intervals, and the sealing groove surrounding the light-emitting plate is formed on the light-emitting module. The sealing glue is filled in the sealing groove, so that the gap between the radiator and the lens cover is closed, and a good sealing effect is achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of lighting equipment, and particularly relates to a light-emitting module based on a profile heat sink and a preparation method thereof. BACKGROUND

[0002] The light-emitting module is a key component widely used in electronic devices such as LED lamps. However, with the increase of the module power, the heat dissipation problem is increasingly significant. At present, a cast heat sink is generally used to improve the heat dissipation performance of the light-emitting module. However, due to the draft angle of the fins of the cast heat sink, the length of the fins of the cast heat sink is small, the fin spacing is large, and the heat dissipation area cannot be effectively increased, thereby limiting the improvement of the heat dissipation effect.

[0003] Compared with the cast heat sink commonly used in the light-emitting module, the heat sink prepared from the profile does not have the draft angle, so that the heat sink can have the heat dissipation fins with a larger length and a smaller spacing, thereby effectively improving the heat dissipation performance. However, due to the processing reason, the profile heat sink cannot be manufactured to have the annular groove structure, so that it is difficult to ensure the sealing effect between the heat sink and the lens. Therefore, how to simultaneously meet the requirements of the heat dissipation performance and the lens sealing has become a difficult problem to be solved in the field of light-emitting modules. SUMMARY

[0004] The present application aims to provide a light-emitting module based on a profile heat sink and a preparation method thereof.

[0005] In a first aspect, the present application provides a light-emitting module based on a profile heat sink, which comprises a lens cover, a light-emitting plate and a heat sink. The lens cover and the light-emitting plate are both arranged on the mounting surface of the heat sink. The light-emitting plate is arranged between the lens cover and the heat sink. The heat sink is prepared from a profile. The mounting surface of the heat sink is provided with n insertion grooves; n≥2.

[0006] The lens cover comprises a lens main body, an annular structure, a connecting section and n insertion and fastening structures. The annular structure surrounds the periphery of the lens main body. The n insertion and fastening structures are arranged on the lens cover. The insertion and fastening structure comprises an insertion piece. The insertion pieces in the n insertion and fastening structures are respectively inserted into the n insertion grooves on the heat sink and form an interference fit.

[0007] The inner side edge of the annular structure, the outer edge of the lens main body and the mounting surface of the heat sink form a sealing groove. The entire sealing groove is filled with sealing glue.

[0008] As a preferred, the slot is directly formed in the process of extruding the heat sink. Therefore, the length direction of the slot is parallel to the extruding direction of the heat sink in the extruding process, and the two ends of the slot are communicated with the two side edges of the heat sink respectively. The area where the slot is aligned with the sealing groove is filled with sealing glue. The sealing glue in the area where the slot is aligned with the sealing groove is automatically formed by the fluidity of the sealing glue when the sealing glue is injected into the sealing groove.

[0009] As a preferred, the position where the slot is connected with the corresponding plug-in part in part or all of the slots is filled with sealing glue.

[0010] As a preferred, along the arrangement direction of the slots, the mounting surface of the heat sink is divided into a light-emitting area aligned with the light-emitting plate and two fastening connection areas staggered with the light-emitting plate. There is at least one slot in each of the two fastening connection areas.

[0011] As a preferred, the plug-in part corresponding to the slot in the fastening connection area adopts an integrated structure, extending from one side edge of the inner side surface of the lens body to the other side edge.

[0012] As a preferred, along the arrangement direction of the slots, the mounting surface of the heat sink is divided into a light-emitting area aligned with the light-emitting plate and two fastening connection areas staggered with the light-emitting plate. There is at least one slot in the light-emitting area.

[0013] As a preferred, the plug-in part corresponding to the slot in the light-emitting area adopts a separate structure, including one plug-in block or including multiple plug-in blocks arranged separately and sequentially. The width of the plug-in block along the length direction of the slot is less than the width of the light-emitting plate along the length direction of the slot; part or all of the plug-in blocks pass through the accommodation through slot on the light-emitting plate as a whole or partially. The number and length of the plug-in blocks on different plug-in parts can be the same or different.

[0014] As a preferred, the number of plug-in blocks in part or all of the plug-in parts adopting the separate structure is m≥3; two plug-in blocks of the m plug-in blocks are respectively located at the two side edges of the inner side surface of the lens body. At least one plug-in block of the remaining plug-in blocks passes through the accommodation through slot on the light-emitting plate as a whole.

[0015] As a preferred, the two plug-in blocks located at the two side edges of the inner side surface of the lens body both partially pass through the accommodation through slot on the light-emitting plate and communicated with the edge of the light-emitting plate.

[0016] As a preferred, the cross-sectional shape of part or all of the accommodation through slot matches the cross-sectional shape of the corresponding plug-in block, so that the plug-in block can provide positioning for the light-emitting plate through the accommodation through slot.

[0017] As a preferred, the width of the sealing groove at different positions is consistent.

[0018] As preferred, the plug-in fastening structure further comprises two sealing blocks. The plug-in part is arranged between the two sealing blocks. The plug-in part is arranged on the lens body; both of the sealing blocks are arranged on the ring-shaped structure. Both of the sealing blocks extend into the corresponding slot.

[0019] As preferred, the connecting section is arranged between the plug-in part and the sealing block, and is completely arranged in the slot of the heat sink.

[0020] As preferred, part or all of the sealing blocks form an interference fit with the corresponding slot. The sealing blocks that form an interference fit with the corresponding slot are provided with a gap for providing a deformation space when the sealing block is inserted into the slot. The position of the slot that connects with the corresponding sealing block is filled with sealant.

[0021] As preferred, the static friction force exists between the plug-in part and the slot at the interference position; the static friction force causes the extrusion force between the lens cover and the light-emitting plate. The extrusion force is generated in the following way: the lens cover is subjected to the pulling force (provided by the static friction force) of the plug-in part; the pulling force causes the elastic deformation of the lens cover, and further extrudes the light-emitting plate.

[0022] As preferred, the static friction force between the plug-in part and the slot comes from the pre-tightening force applied during the assembly of the lens cover and the heat sink; the pre-tightening force is 5000N-30000N.

[0023] As preferred, the plug-in part is provided with a gap; the depth of the gap is less than the height of the plug-in part; the plug-in part is divided into a deformation part corresponding to the position of the gap and an interference part offset from the position of the gap in the height direction; the interference part forms an interference fit with the slot, and the interference amount is 0.1mm-0.3mm.

[0024] As preferred, the area of the side wall of the slot that forms an interference fit with the plug-in part is inclined from the inside to the outside in the depth direction of the slot.

[0025] As preferred, the two sides of the plug-in part that face the side wall of the slot are uneven.

[0026] As preferred, the uneven side of the plug-in part has a glue guide groove extending from the root to the tip of the plug-in part.

[0027] As preferred, the two sides of the heat sink are respectively a mounting surface and a heat dissipation surface; the mounting surface of the heat sink is attached to the light-emitting plate; the heat dissipation surface of the heat sink is provided with heat dissipation fins arranged at intervals. The distance between the heat dissipation fins is 8mm-12mm; the height of the heat dissipation fins is 30mm-38mm.

[0028] As preferred, the lens body and the ring-shaped structure are fixedly connected through the connecting section.

[0029] Preferably, the lens body, the annular structure, the connecting section and the plug-in fastening structure of the lens cover are integrally formed by plastic.

[0030] Preferably, the light-emitting plate comprises a PCB and a plurality of lamp beads distributed on the PCB. The lens body is provided with a plurality of lens units. The positions of the lens units correspond to the positions of the lamp beads on the light-emitting plate respectively.

[0031] Preferably, a plurality of positioning through holes are formed on the light-emitting plate. A plurality of positioning blind holes are formed on the heat sink. A plurality of positioning columns are arranged on the inner side of the lens cover. Each positioning column passes through the corresponding positioning through hole on the light-emitting plate and extends into the corresponding positioning blind hole on the heat sink.

[0032] In the second aspect, the application provides a preparation method of the light-emitting module, comprising the following steps:

[0033] Step one: the heat sink is processed by an extrusion molding process.

[0034] Step two: the light-emitting plate is placed on the heat sink.

[0035] Step three: the lens cover is arranged above the light-emitting plate. Each plug-in fastening structure on the lens cover extends into the corresponding slot on the heat sink.

[0036] Step four: an extrusion force is applied to the lens cover towards the heat sink. Under the action of the extrusion force, the plug-in part in each plug-in fastening structure forms an interference fit with the slot.

[0037] Step five: liquid sealant is injected into the sealing groove between the annular structure and the lens body on the lens cover. After the sealant is cured, the preparation of the light-emitting module is completed.

[0038] Preferably, before step two, liquid sealant is injected into some or all of the slots on the mounting surface of the heat sink.

[0039] Preferably, before step five, liquid sealant is injected into the position where the sealing groove intersects with each slot.

[0040] The application has the following beneficial effects:

[0041] 1. The application sets slots on the mounting surface of the heat sink, which pass through to the side surface of the heat sink, and uses the plug-in part on the lens cover to fix the lens cover and the heat sink. Meanwhile, the application divides the lens cover into the lens body and the annular structure with a space therebetween, forms a sealing groove around the light-emitting plate on the light-emitting module, and fills the sealing groove with sealant, so as to seal the gap between the heat sink and the lens cover and achieve an IP68-level or above sealing effect.

[0042] 2、The present application overcomes the defect that the profile extrusion molding process cannot form a ring structure on the front surface of the heat sink to help sealing, resulting in poor sealing effect of the light emitting module, by providing a through slot structure on the lens cover, and further forming an annular sealing structure on the mounting surface of the heat sink by sealing glue, while obtaining good heat dissipation effect and waterproof and dustproof performance.

[0043] 3、The present application forms an interference fit between the multiple different positions of the lens cover and the insertion slot on the heat sink through the insertion structure; on the one hand, the structure can provide tensile force constraint to the lens cover, so that the lens cover is not prone to bulging deformation during long-term use, improving the accuracy of lens light distribution, so that the light emitting module maintains high light output rate during long-term use. On the other hand, the different positions on the lens cover can uniformly exert extrusion force on the light emitting plate, ensuring that different positions of the light emitting plate can be tightly attached to the heat sink, thereby increasing the heat exchange area of the light emitting plate and the heat sink and improving the heat dissipation effect.

[0044] 4、In the present application, the different positions of the light emitting plate are pressed against the heat sink by the lens cover, avoiding the technical solution of using screws to fix between the light emitting plate and the heat sink, and further avoiding the problem of warping and easy deformation of the PCB plate away from the position of the screw caused by screw fixation. This enables the light emitting plate in the present application to be tightly attached to the heat sink at the same time, improving the heat dissipation efficiency.

[0045] 5、The PCB plate in the present application is pressed between the lens cover and the heat sink, and the overall stress is balanced; therefore, the thickness of the PCB plate can be further thinned without worrying about the deformation problem, thereby further reducing the production cost of the light emitting module. Moreover, since the entire bottom surface of the lens cover is tightly pressed against the PCB plate, the requirement for the flatness of the PCB plate surface is reduced, the process of treating the flatness of the PCB surface is omitted, and the production cost of the light emitting module is reduced.

[0046] 6、The insertion and fastening structure in the present application is integrally formed on the lens cover, which forms an interference fit between the middle position of the lens cover and the heat sink without generating additional independent connecting pieces, simplifying the complexity of assembling the light emitting module. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 It is a schematic diagram of the overall structure of embodiment 1 of the present application;

[0048] Figure 2 It is an explosion schematic diagram of embodiment 1 of the present application;

[0049] Figure 3 It is a cross-sectional schematic diagram of embodiment 1 of the present application;

[0050] Figure 4 It is a connection schematic diagram of the insertion piece and the insertion slot in embodiment 1 of the present application (i.e.Figure 3 (Enlarged view of part A in the middle);

[0051] Figure 5 This is a cross-sectional schematic diagram of Embodiment 1 of the present invention;

[0052] Figure 6 This is a schematic diagram of the fit between the insertion fastening structure and the slot in Embodiment 1 of the present invention (i.e., Figure 5 (Enlarged view of part B in the middle section);

[0053] Figure 7 This is a schematic diagram of the heat sink structure in Embodiment 1 of the present invention;

[0054] Figure 8 This is a schematic diagram of the lens cover structure in Embodiment 1 of the present invention;

[0055] Figure 9 This is a partial structural diagram of the insertion fastening structure in Embodiment 1 of the present invention (i.e.) Figure 6 (Enlarged view of part B in the middle section);

[0056] Figure 10 This is a schematic diagram of the connector structure in Embodiment 3 of the present invention. Detailed Implementation

[0057] The present invention will be further described below with reference to the accompanying drawings.

[0058] Example 1

[0059] like Figure 1 , 2 As shown in Figures 3 and 5, a light-emitting module based on a profile heat sink includes a lens cover 1, a light-emitting plate 2, and a heat sink 3. The lens cover 1, light-emitting plate 2, and heat sink 3 are stacked sequentially. The light-emitting plate 2 includes a PCB board and several LEDs distributed on the PCB board. Several lens units are integrally formed on the lens cover 1. The position of each lens unit corresponds to the position of each LED on the light-emitting plate 2, used for light distribution of the light emitted by the LEDs. The heat sink 3 is made of profile material, obtained by extrusion molding of aluminum alloy. The two sides of the heat sink 3 are a mounting surface and a heat dissipation surface, respectively; the mounting surface of the heat sink 3 is attached to the light-emitting plate 2; the heat dissipation surface of the heat sink 3 is provided with spaced-apart heat dissipation fins. The power supply line of the light-emitting plate 2 is led out through a wire hole in the middle of the heat sink 3. The connection between the heat sink 3 and the power supply line is sealed.

[0060] like Figure 2 and 7As shown, the mounting surface of the heat sink 3 is provided with six slots 3-1 arranged in sequence along the length direction of the light emitting module. The width direction of the heat sink 3 is the extrusion direction when it is extruded. Since the heat sink 3 is a profile, the two ends of the slot 3-1 are communicated with the two side surfaces of the heat sink 3, and the length direction of the slot 3-1 is parallel to the length direction of the heat dissipation fin. The slot 3-1 is used to cooperate with the plug-in part 4-1 on the lens cover 1 to realize the fixation of the lens cover 1 and the heat sink 3.

[0061] As shown in Figures 3-9 The lens cover 1 includes an integrally formed lens body 1-1, an annular structure 1-2, a connecting section 1-3 and a plug-in fastening structure 4. All the lens units on the lens cover 1 are arranged on the lens body 1-1. The inner side edge of the annular structure 1-2 is wrapped around the outer side of the lens body 1-1. The inner side edge of the annular structure 1-2 is arranged in a spaced manner with the outer edge of the lens body 1-1; the inner side edge of the annular structure 1-2, the outer edge of the lens body 1-1 and the mounting surface of the heat sink 3 form a sealing groove 5. The width of the sealing groove 5 at different positions remains the same. The lens body 1-1 and the annular structure 1-2 are connected through the connecting section 1-3 to realize the integrated structure between the lens body 1-1 and the annular structure 1-2.

[0062] The six plug-in fastening structures 4 are arranged on the inner side surface of the lens cover 1. The six plug-in fastening structures 4 are arranged in sequence along the length direction of the lens cover 1, and correspond to the six slots 3-1 on the heat sink 3 respectively. The plug-in fastening structure 4 includes a plug-in part 4-1 and two closing blocks 4-2 arranged along the width direction of the lens cover 1. The plug-in part 4-1 is arranged between the two closing blocks 4-2. The plug-in part 4-1 is arranged on the lens body 1-1; the two closing blocks 4-2 are arranged on the annular structure 1-2. The two closing blocks 4-2 are connected with the opposite ends of the plug-in part 4-1 through the connecting section 1-3. The connecting section 1-3 fixes the relative position between the lens body 1-1 and the annular structure 1-2.

[0063] As shown in Figure 8As shown, the connector 4-1 can be either an integral structure or a separate structure. Among the six connector fastening structures 4, the connector 4-1 in the two connector fastening structures at both ends differs in structure from the connector 4-1 in the four connector fastening structures in the middle. The light-emitting plate is located between the two connector fastening structures at both ends. The connector 4-1 in the two connector fastening structures at both ends is an integral structure, extending from one edge of the lens body 1-1 to the other edge. The connector 4-1 in the four connector fastening structures in the middle is a separate structure, comprising three independent connector blocks 4-1-1. Two of these connector blocks 4-1-1 are located at the two edges of the inner surface of the lens body 1-1, respectively. The third connector block 4-1-1 is located at the middle position of the inner surface of the lens body 1-1 in the width direction.

[0064] like Figure 2 As shown, the light-emitting plate 2 has multiple clearance slots 2-1. The position of each clearance slot 2-1 corresponds to the position of each plug-in block 4-1-1 in the four plug-in fastening structures 4 arranged in the middle. Since the plug-in pieces 4-1 in the four plug-in fastening structures 4 arranged in the middle adopt an independent structure, the clearance slots 2-1 do not need to completely cut off the light-emitting plate.

[0065] The six plug-in fastening structures 4 each have a plug-in component 4-1 inserted into its corresponding slot 3-1, forming an interference fit. The six plug-in fastening structures 4 each have a closing block 4-2 inserted into the end of its corresponding slot 3-1, forming an interference fit. The tip of the closing block 4-2 has a groove identical to the tip of the plug-in block 4-1-1, so that the closing block 4-2 can be smoothly inserted into the slot 8-1.

[0066] The connecting section 1-3 is completely within the slot 3-1, thus preventing damage to the integrity of the sealing groove 5. Sealant is filled between the slot 3-1 and the connector 4-1 and the sealing block 4-2. Sealant is also filled in the sealing groove 5 between the annular structure 1-2 and the lens body 1-1. The sealant in the slot 3-1 and the sealant in the sealing groove 5 are integrated, completely sealing the gap between the edge of the lens cover 1 and the edge of the heat sink 3, completely isolating the light-emitting panel from the external environment, achieving an IP68 waterproof rating for the light-emitting module. It should be noted that the sealant between the slot 3-1 and the connector 4-1 and the sealing block 4-2 is not a necessary technical feature. If the connection between the connector 4-1 and the slot 3-1 is sufficiently secure, and the sealant in the sealing groove 5 meets the sealing requirements, sealant may not be required inside the slot 3-1.

[0067] After the plug-in part 4-1 is inserted into the slot 3-1 to the limit position (i.e. the position of the plug-in part 4-1 when the two side surfaces of the light-emitting plate 2 respectively contact the heat sink 3 and the lens body 1-1), further pre-tightening pressure is applied to the lens cover 1, so that the light-emitting plate 2 is pressed by the lens cover 1 and the heat sink 3, and the depth of the plug-in part 4-1 inserted into the slot 3-1 is further increased (the space required for further insertion is provided by the elastic deformation of the lens cover 1, the light-emitting plate 2 and the heat sink 3); when the pre-tightening pressure applied to the lens cover 1 is removed, the frictional force between the interference fit plug-in part 4-1 and the slot 3-1 resists the recovery of elastic deformation, so that the lens cover 1 maintains the pressing force on the light-emitting plate 2 and presses the light-emitting plate 2 against the heat sink 3.

[0068] At the same time, the plug-in block 4-1-1 located at the middle position of the inner side surface of the lens body 1-1 can avoid the middle part of the lens cover 1 from being deformed and raised due to heat in use, thereby avoiding the generation of gaps between the lens and the light-emitting plate 2 and the change of the relative positions between each lamp bead and the corresponding lens. Therefore, the structure of the plug-in part 4-1 and the slot 3-1 can make the lens light distribution of the light-emitting module remain accurate in long-term use. As can be seen, the plug-in fastening structure 4 provided in the embodiment can further improve the anti-deformation ability of the lens cover 1, improve the tightness of the light-emitting plate and the heat sink, and further limit the light-emitting plate to ensure that the light-emitting plate does not shift in position.

[0069] The embodiment provides a preferred non-essential technical feature: a gap groove 4-1-2 is formed on the tip position (i.e. the surface farthest from the lens body 1-1) of the plug-in part 4-1 and extends along the length direction of the slot 3-1. The gap groove 4-1-2 forms two deformation pieces arranged at a distance from each other on the plug-in part 4-1. The depth of the gap groove 4-1-2 is less than the height of the plug-in part 4-1, so that the end of the plug-in part 4-1 close to the lens cover 1 forms a part not separated by the gap groove 4-1-2. The depth of the gap groove 4-1-2 is greater than or equal to 2 mm (preferably equal to 2 mm), and the width is greater than or equal to 0.7 mm (preferably equal to 0.7 mm).

[0070] The plug-in part 4-1 is divided into a deformation part 4-1-3 corresponding to the position of the gap groove 4-1-2 and an interference part 4-1-4 staggered with the position of the gap groove 4-1-2 in the height direction of the plug-in part 4-1. The deformation part 4-1-3 has small rigidity under the action of the gap groove 4-1-2 and is used for deforming when being inserted into the slot 3-1, so as to increase the depth of the plug-in part 4-1 inserted into the slot 3-1; the interference part 4-1-4 has a solid structure and large rigidity and is used for forming an interference amount between the interference part 4-1-4 and the side wall of the slot 3-1, so that the lens cover 1 and the heat sink 3 can generate a frictional force resisting deformation. The interference amount by which the lens cover 1 and the heat sink 3 can generate the frictional force resisting deformation is provided by the interference part 4-1-4 of the plug-in part 4-1.

[0071] The embodiment provides a preferred non-essential technical feature that two sides of the slot 3-1 in interference fit with the plug-in part 4-1 are arranged in opposite directions and gradually increase in distance in the direction from inside to outside; the shape can facilitate the insertion of the plug-in part 4-1 into the slot 3-1 and gradually form an interference fit structure. The interference between the interference part 4-1-4 on the plug-in part 4-1 and the slot 3-1 is greater than or equal to 0.1 mm.

[0072] The embodiment provides a preferred non-essential technical feature that the material of the lens cover 1 is PC, which can withstand the pressure of 5000N-30000N required when the plug-in part 4-1 is inserted into the slot 3-1.

[0073] The embodiment provides a preferred non-essential technical feature that two positioning through holes 2-2 are formed on the light-emitting plate 2. Two positioning blind holes 3-2 are formed on the heat sink 3. Two positioning columns 3-4 are integrally formed on the inner side of the lens cover 1. The two positioning columns 3-4 respectively pass through the two positioning through holes 2-2 on the light-emitting plate 2 and respectively extend into the two positioning blind holes 3-2 on the heat sink 3, so as to realize the positioning between the lens cover 1, the light-emitting plate 2 and the heat sink 3.

[0074] The embodiment provides a preferred non-essential technical feature that the distance between the heat dissipation fins is 8mm-12mm (preferably 11mm); the height of the heat dissipation fins is 30mm-38mm (preferably 30mm). In the case that the power of the light-emitting module is small and the heat dissipation requirement is low, the height of the heat dissipation fins can also be set to 10mm or other height less than 30mm.

[0075] In the embodiment, the root of the plug-in part 4-1 represents the position where the plug-in part 4-1 is connected to the lens cover; the tip of the plug-in part 4-1 represents the position where the plug-in part 4-1 is farthest away from the lens cover.

[0076] Embodiment 2

[0077] A preparation method of a light-emitting module is used to prepare the light-emitting module as described in Embodiment 1.

[0078] The preparation method comprises the following steps:

[0079] Step one, the heat sink 3 is processed by an aluminum alloy extrusion forming process; the lens cover 1 is processed by an injection molding process; and the light-emitting plate on which the lamp bead welding is completed is produced.

[0080] Step two, the slot 3-1 on the mounting surface of the heat sink 3 is injected with liquid sealant. The sealant can be injected into the entire slot 3-1 or only into the corresponding position of the plug-in part 4-1 and the closing block 4-2.

[0081] Step three, place the light-emitting plate 2 on the heat sink 3, and make the positioning through hole 2-2 on the light-emitting plate 2 align with the positioning blind hole 3-2 on the heat sink 3.

[0082] Step four, cover the lens cover 1 on the light-emitting plate 2, so that the positioning column 3-4 on the lens cover 1 passes through the positioning through hole 2-2 on the light-emitting plate 2 and extends into the positioning blind hole 3-2 on the heat sink 3. The six plug-in fastening structures 4 on the lens cover 1 respectively extend into the six insertion slots 3-1 on the heat sink 3. Each plug-in fastening structure 4 is in full contact with the sealing glue in the corresponding insertion slot 3-1.

[0083] Step five, apply an extrusion force to the lens cover 1 towards the heat sink, and the extrusion force is controlled at 5000N-30000N. Under the action of the extrusion force, the plug-in part 4-1 in each plug-in fastening structure 4 is further inserted into the corresponding insertion slot 3-1, so that the interference part 4-1-4 on the plug-in part 4-1 forms an interference fit with the two side walls of the insertion slot 3-1, and at the same time, the two side surfaces of the light-emitting plate 2 are respectively attached to the lens cover 1 and the heat sink 3, and the light-emitting plate 2 is subjected to the extrusion force applied by the lens cover 1.

[0084] Step six, remove the extrusion force applied to the lens cover 1, and inject liquid sealing glue into the sealing groove 5 between the annular structure 1-2 and the lens body 1-1 on the lens cover 1. The sealing groove 5 is filled with sealing glue at all positions.

[0085] Step seven, wait for the sealing glue in the insertion slot 3-1 and the sealing groove 5 to solidify, and the light-emitting module is completed.

[0086] It should be noted that in the case that the connection between the plug-in part 4-1 and the insertion slot 3-1 is stable enough, and the flowability of the sealing glue added to the sealing groove 5 is good enough (as a standard to fully fill the part of the insertion slot 3-1 aligned with the sealing groove 5), the insertion slot 3-1 of the heat sink 3 can not be injected with sealing glue, that is, step two is not performed.

[0087] Embodiment 3

[0088] A light-emitting module based on a profile heat sink, the difference between this embodiment and embodiment 1 is that the structure of the plug-in part 4-1 is different.

[0089] In this embodiment, as shown in Figure 10 The two sides of the plug-in part 4-1 are provided with wavy stripe structures 5-1-4. The sealing glue in the insertion slot 3-1 enters the gap between the concave area of the stripe structure 5-1-4 on the plug-in part 4-1 and the insertion slot 3-1, so that the adhesion between the plug-in part 4-1 and the insertion slot 3-1 is further increased on the basis of friction, and the stability of the connection between the plug-in part 4-1 and the heat sink 3 is improved.

[0090] The embodiment provides a preferred non-essential technical feature: a glue guide groove is formed on the side of the strip structure 5-1-4 of the splicing piece 4-1 and extends from the root of the splicing piece 4-1 to the tip.

[0091] Embodiment 4

[0092] A light-emitting module based on a profile heat sink, wherein the difference between the embodiment and the embodiment 1 is that the lens cover 1 is not provided with the positioning column 3-4, the light-emitting plate 2 is not provided with the positioning through hole 2-2, and the heat sink 3 is not provided with the positioning blind hole 3-2.

Claims

1. A light-emitting module based on a profile heat sink, comprising a lens cover (1), a light-emitting plate (2) and a heat sink (3); characterized in that: The lens cover (1) and the light-emitting plate (2) are arranged on the mounting surface of the heat sink (3); the light-emitting plate (2) is arranged between the lens cover (1) and the heat sink (3); the heat sink (3) is made of a profile; the mounting surface of the heat sink (3) is provided with n insertion grooves (3-1); n is greater than or equal to 2; the insertion grooves (3-1) are directly formed in the process of extruding the heat sink (3); The lens cover (1) comprises a lens main body (1-1), an annular structure (1-2) and n insertion fastening structures (4); the annular structure (1-2) surrounds the periphery of the lens main body (1-1); the n insertion fastening structures (4) are arranged on the lens cover (1); the insertion fastening structure (4) comprises an insertion piece (4-1); the insertion pieces (4-1) in the n insertion fastening structures (4) are respectively inserted into the n insertion grooves (3-1) on the heat sink (3) and form an interference fit; The inner side edge of the annular structure (1-2), the outer edge of the lens main body (1-1) and the mounting surface of the heat sink (3) form a sealing groove (5); the entire sealing groove (5) is filled with sealing glue; The insertion fastening structure (4) further comprises two sealing blocks (4-2); the two sealing blocks (4-2) are arranged on the annular structure (1-2); the two sealing blocks (4-2) are respectively inserted into the corresponding insertion grooves; the region where each insertion groove is aligned with the sealing groove (5) is filled with sealing glue.

2. The light emitting module based on the profile heat sink according to claim 1, characterized in that: The position where the corresponding insertion piece (4-1) is connected in part or all of the insertion grooves (3-1) is filled with sealing glue.

3. The light emitting module based on the profile heat sink according to claim 1, characterized in that: Along the arrangement direction of the insertion grooves, the mounting surface of the heat sink (3) is divided into a light-emitting area aligned with the light-emitting plate and two fastening connection areas staggered with the light-emitting plate; at least one insertion groove (3-1) exists on each fastening connection area.

4. The light emitting module based on the profile heat sink according to claim 3, characterized in that: The insertion piece (4-1) corresponding to the insertion groove (3-1) in the fastening connection area adopts an integrated structure and extends from one side edge of the inner side surface of the lens main body (1-1) to the other side edge.

5. The light emitting module based on the profile heat sink according to claim 1, characterized in that: Along the arrangement direction of the insertion grooves, the mounting surface of the heat sink (3) is divided into a light-emitting area aligned with the light-emitting plate and two fastening connection areas staggered with the light-emitting plate; at least one insertion groove (3-1) exists on the light-emitting area.

6. The light emitting module based on the profile heat sink according to claim 4, characterized in that: The insertion piece (4-1) corresponding to the insertion groove (3-1) in the light-emitting area adopts a separate structure and comprises an insertion block (4-1-1) or a plurality of insertion blocks (4-1-1) arranged independently and sequentially in intervals; the width of the insertion block (4-1-1) along the length direction of the insertion groove (3-1) is smaller than the width of the light-emitting plate (2) along the length direction of the insertion groove (3-1); part or all of the insertion blocks (4-1-1) pass through the accommodation slot on the light-emitting plate (2) as a whole or partially.

7. The light emitting module based on a profile heat sink according to claim 6, characterized in that: Part or all of the plug-in blocks in the plug-in piece (4-1) with independent structure, m ≥ 3; two plug-in blocks (4-1-1) are located at the two side edges of the inner side of the lens body (1-1); at least one of the remaining plug-in blocks (4-1-1) passes through the accommodation slot (2-1) provided on the light-emitting plate (2).

8. The light emitting module based on the profile heat sink according to claim 6, characterized in that: Two plug-in blocks (4-1-1) located at the two side edges of the inner side of the lens body (1-1) partially pass through the accommodation slot (2-1) provided on the light-emitting plate (2) and communicate with the edge of the light-emitting plate (2).

9. The light emitting module based on a profile heat sink according to claim 7, characterized in that: The cross-sectional shape of part or all of the accommodation slot (2-1) matches the cross-sectional shape of the corresponding plug-in block (4-1-1), so that the plug-in block (4-1-1) can provide positioning for the light-emitting plate (2) through the accommodation slot (2-1).

10. The light emitting module based on the profile heat sink according to claim 1, characterized in that: The width of the sealing groove (5) at different positions remains the same.

11. The light emitting module based on a profile heat sink according to claim 1, characterized in that: The plug-in piece (4-1) is arranged between the two closed blocks (4-2) corresponding to the plug-in fastening structure (4); the plug-in piece (4-1) is arranged on the lens body (1-1).

12. The profile heat sink based light emitting module of claim 11, wherein: Part or all of the closed blocks (4-2) and the end of the corresponding plug-in piece (4-1) are fixedly connected through the connecting section (1-3); the connecting section (1-3) is completely located in the insertion slot of the heat sink (3).

13. The profile heat sink based light emitting module of claim 11, wherein: Part or all of the closed blocks (4-2) and the corresponding insertion slot form an interference fit; the closed blocks (4-2) that form an interference fit with the corresponding insertion slot are provided with an interval slot that provides a deformation space for the insertion of the closed blocks (4-2) into the insertion slot; part or all of the insertion slots (3-1) are filled with sealing glue at the positions connected with the corresponding closed blocks (4-2).

14. The profile heat sink based light emitting module of claim 1, wherein: The static friction force exists between the plug-in piece (4-1) and the insertion slot (3-1) at the interference position; the static friction force causes an extrusion force to exist between the lens cover (1) and the light-emitting plate (2).

15. The profile heat sink based light emitting module of claim 14, wherein: The static friction force between the plug-in piece (4-1) and the insertion slot (3-1) comes from the pre-tightening force applied during the assembly of the lens cover (1) and the heat sink (3); the pre-tightening force is 5000N-30000N.

16. The profile heat sink based light emitting module of claim 1, wherein: The plug-in piece (4-1) is provided with an interval slot (4-1-2); the depth of the interval slot (4-1-2) is less than the height of the plug-in piece (4-1); the plug-in piece (4-1) is divided into a deformation part (5-1-2) corresponding to the position of the interval slot (4-1-2) and an interference part (5-1-3) offset from the position of the interval slot (4-1-2) in the height direction; the interference part (5-1-3) forms an interference fit with the insertion slot (3-1), and the interference amount is 0.1mm-0.3mm.

17. The profile heat sink based light emitting module of claim 1, wherein: The side walls of the insertion slot (3-1) that form an interference fit with the plug-in piece (4-1) are inclined outward from the inside in the depth direction of the insertion slot (3-1).

18. The profile heat sink based light emitting module of claim 1, wherein: The two sides of the plug-in piece (4-1) facing the side walls of the insertion slot (3-1) are concave-convex.

19. The extruded heat sink based light module of claim 18, wherein: The concave-convex side of the plug-in piece (4-1) has a glue guide groove extending from the root to the tip of the plug-in piece (4-1).

20. The profile heat sink based light emitting module of claim 1, wherein: The heat sink (3) has a mounting surface and a heat dissipation surface on two sides respectively; the mounting surface of the heat sink (3) is attached to the light-emitting plate (2); the heat dissipation surface of the heat sink (3) is provided with heat dissipation fins arranged at intervals; the interval of the heat dissipation fins is 8mm-12mm; the height of the heat dissipation fins is 30mm-38mm.

21. The light emitting module based on the profile heat sink according to claim 1, characterized in that: The lens body (1-1) and the annular structure (1-2) are fixedly connected through the connecting section (1-3).

22. The extruded heat sink based light module of claim 21, wherein: The lens body (1-1), the annular structure (1-2), the connecting section (1-3) and the plug-in fastening structure (4) in the lens cover (1) are obtained by plastic one-piece molding.

23. The extruded heat sink based light module of claim 1, wherein: The light-emitting plate (2) comprises a PCB plate and a plurality of lamp beads distributed on the PCB plate; the lens body (1-1) is provided with a plurality of lens units; the positions of the lens units correspond to the positions of the lamp beads on the light-emitting plate (2) respectively.

24. The extruded heat sink based light module of claim 1, wherein: A plurality of positioning through holes (2-2) are formed on the light-emitting plate (2); a plurality of positioning blind holes (3-2) are formed on the heat sink (3); a plurality of positioning columns (3-4) are arranged on the inner side surface of the lens cover (1); each positioning column (3-4) passes through the corresponding positioning through hole (2-2) on the light-emitting plate (2) and extends into the corresponding positioning blind hole (3-2) on the heat sink (3).

25. A method of manufacturing a profiled heat sink based light module according to any one of claims 1-24, characterized by: The method comprises the following steps: Step one, the heat sink (3) is processed by extrusion molding process; Step two, the light-emitting plate (2) is placed on the heat sink (3); Step three, the lens cover (1) is arranged above the light-emitting plate (2); each plug-in fastening structure (4) on the lens cover (1) extends into each slot (3-1) on the heat sink (3); the slot (3-1) is directly formed in the process of extrusion molding of the heat sink (3); the plug-in fastening structure (4) comprises a plug-in part (4-1) and two closed blocks (4-2); the two closed blocks (4-2) are arranged on the annular structure (1-2); the two closed blocks (4-2) extend into the corresponding slots; the plug-in part (4-1) is arranged between the two closed blocks (4-2) of the corresponding plug-in fastening structure (4); the plug-in part (4-1) is arranged on the lens body (1-1); Step four, the lens cover (1) is extruded towards the heat sink; under the action of the extrusion force, the plug-in part (4-1) in each plug-in fastening structure (4) forms an interference fit with the slot (3-1); Step five, liquid sealant is injected into the sealing groove (5) between the annular structure (1-2) and the lens body (1-1) on the lens cover (1); the sealant is filled in the area where each slot is aligned with the sealing groove (5); after the sealant is cured, the light-emitting module is prepared.

26. The method of claim 25, wherein: Before step two, liquid sealant is injected into part or all of the slots (3-1) on the mounting surface of the heat sink (3).

27. The method of claim 25, wherein: Before step five, liquid sealant is injected at the position where the sealing groove (5) intersects with each slot (3-1).

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