Composite LED light bar heat dissipation structure

Abstract

The application relates to the technical field of LED lighting devices, and discloses a composite LED light bar heat dissipation structure which comprises a heat dissipation shell, an LED light bar and a heat dissipation assembly. The heat dissipation assembly adopts a wind-cooling and heat-conducting composite structure, the heat of the LED light bar is respectively conducted to a ventilation groove two and a ventilation groove one through heat-conducting sheets and two heat-conducting inserts, external cold air is injected from an air inlet pipe, and the cold air sequentially flows through the two ventilation grooves to carry out the heat; the tail parts of the heat-conducting inserts are staggered in an upper and lower mode to form a bent cold air passage, and the heat exchange time is prolonged; a quick-release fixing assembly can be selected, the heat dissipation shell can be quickly disassembled and assembled by only rotating a handle, and the self-locking characteristic guarantees firm fixing. The application has high heat dissipation efficiency, can meet the heat dissipation demand of a high-power LED light bar, is convenient to install and replace, has good dustproof effect, and effectively solves the problem of low heat dissipation efficiency of the existing device.

Description

Technical Field

[0001] This invention relates to the field of LED lighting equipment technology, specifically to a composite LED light strip heat dissipation structure. Background Technology

[0002] LED light strips have advantages such as high luminous efficiency, low energy consumption, long lifespan, and flexible installation, and are widely used in indoor and outdoor lighting, landscape lighting, and advertising signage. However, LED light strips generate a lot of heat when they are working. If the heat cannot be dissipated in time, it will cause the junction temperature of the LED chip to rise, which will not only reduce luminous efficiency and shorten lifespan, but may also cause the chip to burn out in severe cases.

[0003] Existing LED strip heat dissipation structures suffer from several industry pain points: First, they have low heat dissipation efficiency, often relying on a single metal casing for natural heat dissipation, which cannot meet the heat dissipation requirements of high-power LED strips; second, they have a single heat dissipation path, with heat dissipated only through conduction from the casing, resulting in slow heat dissipation; third, they are inconvenient to install and replace, often using bolts to directly fix them to the wall, making disassembly and assembly cumbersome and difficult to adjust the installation position according to needs. Furthermore, they have poor dust protection, allowing external dust to easily enter the heat dissipation channels, clogging the heat dissipation holes and further reducing the heat dissipation effect.

[0004] Therefore, a composite LED light strip heat dissipation structure is proposed to solve the problem of low heat dissipation efficiency in the existing technology. Summary of the Invention

[0005] The purpose of this invention is to propose a composite LED light strip heat dissipation structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A composite LED light strip heat dissipation structure includes a heat dissipation shell, an LED light strip, and a heat dissipation component; The heat sink is a U-shaped shell with caps snapped onto both ends. The LED light strip is placed at the U-shaped opening of the heat sink and is axially fixed by the caps at both ends. The heat dissipation assembly is arranged around the outside of the LED light strip, including ventilation slot one, ventilation slot two, air inlet pipe, heat-conducting plate, connecting square tube, several slots and several heat-conducting inserts; ventilation slot one is opened inside the side walls of both sides of the heat dissipation shell, runs horizontally through and communicates with the side shell covers; ventilation slot two is opened inside the bottom side wall of the heat dissipation shell, runs horizontally through and communicates with the side shell covers; the air inlet pipe is fixed to the center of the bottom of the heat dissipation shell and communicates with ventilation slot two, for connecting to an external cold air source; the heat-conducting plate covers the inner wall of the U-shaped bottom side of the heat dissipation shell, and its bottom is directly connected to ventilation slot two, with the LED light strip located on top of the heat-conducting plate; the connecting square tube connects the middle of ventilation slot one and ventilation slot two, allowing them to pass through; slots are opened on the inner walls of both sides of the U-shaped heat dissipation shell, pass through the heat dissipation shell and communicate with ventilation slot one, and are arranged linearly on both sides of the LED light strip with an upper and lower interval; the heat-conducting inserts are inserted into the slots, with their tails extending into ventilation slot one and arranged alternately with an upper and lower interval, forming a bent cold air passage, extending the contact time between the cold air and the heat-conducting inserts.

[0007] Preferably, it also includes a fixing component, which includes a first connecting block, a second connecting block, a fixed shell, a fixed block, a rotating shaft, a worm gear, a cam, a worm, a moving block, a spring, two sliders, and two clamping blocks; the first connecting block is fixed to the bottom of the heat sink shell, and the second connecting block is hinged to its end; the fixed shell has an opening on one side, and a fixing block with a threaded hole is fixed to its outer wall; the rotating shaft is rotatably installed inside the fixed shell, and the cam and worm gear are fixed to its outer wall in sequence; the worm gear is rotatably installed on the side wall of the fixed shell and meshes with the worm gear; the moving block is slidably installed inside the fixed shell and fits against the cam, and a spring is provided between it and the inner wall of the fixed shell; inclined sliders are fixed on both sides of the moving block, and clamping blocks are slidably sleeved on both sides of the moving block, with grooves on their surfaces that are adapted to the sliders; when the second connecting block is inserted into the fixed shell, the cam rotates and drives the moving block to move, and the slider drives the clamping blocks to open to both sides to clamp the second connecting block.

[0008] Preferably, the outer walls at both ends of the heat sink are provided with slots, and the cover is fixed to the heat sink by the slots.

[0009] Preferably, the surface of the shell cover has three through grooves, which are respectively connected to two ventilation grooves one and two ventilation grooves, and a filter plate is fixed in the through groove.

[0010] Preferably, a lead tube is fixed through the bottom of the heat sink, and the lead tube passes through the heat-conducting sheet, the second ventilation groove and the outer wall of the bottom of the heat sink in sequence for the routing of LED light strips.

[0011] Preferably, the air inlet pipe is welded and fixed to the center of the U-shaped bottom of the heat dissipation shell and communicates with the middle of the ventilation slot two. An external cold air source injects cooling gas into the ventilation slot two through the air inlet pipe.

[0012] Preferably, the worm and worm wheel have self-locking characteristics. After rotating the worm, the worm wheel and the shaft rotate, the position of the cam can be automatically locked to prevent loosening.

[0013] Preferably, the hinge joint between the first connecting block and the second connecting block is provided with a locking structure, which can adjust and lock the installation angle of the heat sink shell to adapt to different installation scenarios.

[0014] Preferably, the clamping block has several transverse anti-slip grooves on the side facing the inner wall of the fixed shell, which are used to increase the contact friction with the connecting block 2 and improve the clamping firmness.

[0015] Preferably, after the cover is snapped onto both ends of the heat sink, its inner end face abuts against both ends of the LED light strip to achieve axial positioning and fixation of the LED light strip and prevent it from moving.

[0016] Compared with the prior art, the present invention provides a composite LED light strip heat dissipation structure, which has the following beneficial effects: In this invention, the heat generated by the LED light strip is conducted to the second ventilation slot through the heat-conducting sheet, and simultaneously conducted to the first ventilation slot through the heat-conducting inserts on both sides. External cold air is injected from the air inlet pipe and flows sequentially through the second ventilation slot, the connecting square tube, and the first ventilation slot, quickly carrying away the heat and meeting the heat dissipation requirements of the high-power LED light strip. The heat-conducting inserts are arranged alternately at their ends in the first ventilation slot, forming a continuously bent cold air passage, which greatly extends the contact time between the cold air and the heat-conducting inserts, improves the heat exchange efficiency, and further enhances the heat dissipation effect, thus improving the heat dissipation efficiency.

[0017] This invention employs a worm gear driven cam clamping structure. Simply rotating the worm gear allows for quick clamping or loosening of connecting block two, enabling rapid assembly and disassembly of the heat sink and the fixed shell. The worm gear and worm wheel have self-locking properties, automatically locking after clamping and preventing loosening due to vibration or other reasons, ensuring a firm and reliable fixation. The hinge between connecting block one and connecting block two allows for adjustable installation angles to adapt to different wall surfaces and installation scenarios, facilitating adjustments to the LED light strip's installation position as needed without repeatedly disassembling wall bolts, significantly improving installation and maintenance efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of an embodiment of the present invention; Figure 2 This is a schematic cross-sectional view of an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the heat dissipation component according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the ventilation slot and the heat-conducting insert in an embodiment of the present invention; Figure 5 This is a schematic diagram of the overall structure of the fixing component according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the internal transmission structure of the fixed component according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the clamping state structure of the fixing component according to an embodiment of the present invention.

[0019] In the diagram: 1. Heat sink housing; 101. Slot; 102. Housing cover; 103. Filter plate; 104. Lead wire pipe; 2. Heat dissipation assembly; 201. Ventilation slot one; 202. Ventilation slot two; 203. Slot; 204. Heat-conducting insert; 205. Connecting square tube; 206. Air duct; 207. Heat-conducting plate; 3. LED light strip; 4. Fixing assembly; 401. Connecting block one; 402. Connecting block two; 403. Fixing housing; 404. Fixing block; 405. Rotating shaft; 406. Worm gear; 407. Cam; 408. Worm; 409. Moving block; 410. Spring; 411. Slider; 412. Clamping block. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Reference Figures 1-7 A composite LED light strip heat dissipation structure This invention discloses a composite LED light strip heat dissipation structure, which mainly consists of a heat dissipation shell 1, an LED light strip 3, a heat dissipation component 2, and an optional fixing component 4. The components work together to achieve reliable fixing, efficient heat dissipation, and convenient installation of the LED light strip, adapting to various application scenarios.

[0022] The heat sink 1 is made of U-shaped aluminum alloy, which has excellent thermal conductivity, providing a mounting carrier for the overall structure and assisting in heat dissipation. Annular slots 101 are provided on the outer walls of both ends of the heat sink 1, through which the cover 102 engages with the heat sink 1. The LED strip 3 is placed at the U-shaped opening of the heat sink 1. After the cover 102 is engaged, its inner end face abuts against both ends of the LED strip 3, achieving axial positioning and fixation of the LED strip 3. A lead tube 104 is fixedly installed through the center of the bottom of the heat sink 1. This lead tube 104 passes sequentially through the heat-conducting plate 207, the second ventilation slot 202, and the outer wall of the bottom of the heat sink 1. The power cord of the LED strip 3 is led out through the lead tube 104, ensuring neat wiring and preventing wire wear.

[0023] The heat dissipation component 2 is arranged around the outside of the LED light strip 3. Its core function is to provide forced heat dissipation for the LED light strip 3, improve heat dissipation efficiency, and ensure stable operation of the LED light strip. The heat dissipation component 2 includes ventilation slot 1 201, ventilation slot 202, air inlet pipe 206, heat conduction plate 207, connecting square tube 205, several slots 203, and several heat conduction inserts 204. All components work together to form a complete heat dissipation path.

[0024] Ventilation slot 1 201 is formed inside the left and right side walls of the heat sink 1, extending laterally along the length of the heat sink 1, and its two ends are connected to the two side covers 102; Ventilation slot 202 is formed inside the bottom side wall of the heat sink 1, also extending laterally along the length, and its two ends are connected to the cover 102. The air inlet pipe 206 is welded and fixed to the center of the U-shaped bottom of the heat sink 1, and is connected to the middle of ventilation slot 202, for connecting to an external cold air source to provide a cooling medium for forced heat dissipation.

[0025] The heat-conducting sheet 207 is made of thin aluminum alloy and is fully covered and adhered to the inner wall of the U-shaped bottom of the heat sink 1 with thermally conductive adhesive. Its bottom is in direct contact with the top of the second ventilation slot 202. The LED light strip 3 is fixed to the top of the heat-conducting sheet 207 with thermally conductive adhesive, so that the heat generated by the LED light strip can be quickly conducted to the heat-conducting sheet and then transferred to the cooling medium in the second ventilation slot. The connecting square tube 205 is set vertically to connect the middle of the first ventilation slot 201 and the second ventilation slot 202, so that the two ventilation slots form a connected airflow channel to realize the circulation of the cooling medium.

[0026] The heat sink 1 has several slots 203 on the inner walls of its U-shaped left and right sides. These slots 203 are linearly arranged along the length of the heat sink 1 and are distributed vertically at intervals, symmetrically arranged on both sides of the LED strip 3. The slots 203 penetrate the side walls of the heat sink 1 and communicate with the interior of the ventilation slot 201. Each slot 203 has an aluminum alloy heat-conducting insert 204 inserted into it via an interference fit. A high-temperature resistant sealing ring is provided at the slot opening to ensure that the interior of the ventilation slot 201 is relatively airtight, preventing cooling gas leakage from affecting the heat dissipation effect. The inner end face of the heat-conducting insert 204 is attached to the side wall of the LED strip 3, and the tail extends into the interior of the ventilation slot 201. The tails of all the heat-conducting inserts 204 are arranged vertically and alternately in the ventilation slot 201, forming a continuous and bent cold air passage, which prolongs the residence time of the cooling gas in the ventilation slot and improves the heat exchange efficiency.

[0027] The surface of the cover 102 has three elongated through slots, which are aligned with and communicate with the ends of two ventilation slots 201 and one ventilation slot 202, respectively, for the discharge of cooling gas. A stainless steel filter plate 103 is welded and fixed in each through slot, which can filter dust and impurities in the outside air, prevent dust from entering the ventilation slot and blocking the heat dissipation channel, and ensure the long-term stable operation of the heat dissipation component.

[0028] An optional fixing component 4 is located at the bottom of the heat sink 1 to enable quick installation and fixation of the heat sink 1, improving the ease of installation and adaptability of the device. The fixing component 4 includes a first connecting block 401, a second connecting block 402, a fixing shell 403, a fixing block 404, a rotating shaft 405, a worm gear 406, a cam 407, a worm 408, a moving block 409, a spring 410, two sliders 411, and two clamping blocks 412.

[0029] Connecting block 401 is welded and fixed to the center of the bottom of the heat sink 1. Its lower end is hinged to connecting block 402 via a pin. The hinge is equipped with a butterfly bolt locking structure, which allows for flexible adjustment of the installation angle of the heat sink 1 and locks the adjusted angle to meet different installation orientation requirements. The fixing shell 403 is a rectangular shell with an opening on the left side. A fixing block 404 is welded and fixed to the outer wall of the right side. The fixing block 404 has a threaded hole in its center, which can be used to pre-fix the fixing shell 403 to the wall or other mounting surface using expansion bolts, providing an installation foundation for the overall structure.

[0030] A rotating shaft 405 is vertically rotatably installed inside a fixed housing 403. From bottom to top, a cam 407 and a worm gear 406 are welded and fixed to its outer wall. A worm 408 is horizontally rotatably installed on the front wall of the fixed housing 403, meshing perpendicularly with the worm gear 406 for transmission. The front end of the worm 408 extends out of the fixed housing 403 and is welded and fixed with a rotating handle for easy manual control. A moving block 409 is horizontally slidably installed inside the fixed housing 403, with its right end face tightly fitted against the outer edge of the cam 407. A spring 410 is horizontally positioned between the left end face of the moving block 409 and the left inner wall of the fixed housing 403. In its natural state, it pushes the moving block 409 to the right, ensuring that the moving block always contacts the cam and guaranteeing transmission reliability.

[0031] A slanted slider 411 is welded and fixed to both the front and rear sides of the movable block 409. The slider 411 is inclined from right to left and gradually opens outwards. Two clamping blocks 412 are slidably fitted onto the front and rear sides of the movable block 409, respectively. The surface of the clamping block 412 has slanted grooves that match the slider 411, realizing the sliding engagement between the slider and the clamping block. Several transverse anti-slip grooves are formed on the side of the clamping block 412 facing the inner wall of the fixed shell 403 to increase the friction between the clamping block and the connecting block 402, improve clamping stability, and prevent loosening.

[0032] The specific workflow of this device is as follows, divided into three stages: installation and fixing, heat dissipation and operation, and disassembly and adjustment: The first stage is installation and fixing: First, fix the fixing block 404 to the predetermined position on the wall using expansion bolts to complete the installation and positioning of the fixing shell 403; then, fix the LED light strip 3 to the top of the heat-conducting plate 207 with thermally conductive adhesive, and lead the power cord of the LED light strip out from the lead tube 104 and tidy it up; insert each heat-conducting plate 204 into the corresponding slot 203 in sequence, ensuring that the inner end face of the heat-conducting plate 204 is tightly attached to the side wall of the LED light strip 3; snap the shell cover 102 onto both ends of the heat sink shell 1 to complete the axial fixing of the LED light strip 3 and the sealing of the heat sink assembly; finally, insert and fix the connecting block 402. Inside the opening on the left side of the shell 403, rotating the handle of the worm gear 408 causes the worm wheel 406 and the rotating shaft 405 to rotate synchronously, thereby driving the cam 407 to rotate. During the rotation of the cam 407, the moving block 409 is pushed to the left, compressing the spring 410. When the moving block 409 moves to the left, the inclined slider 411 slides in the groove of the clamping block 412, driving the two clamping blocks 412 to open to the front and rear sides, cooperating with the inner walls of the fixed shell 403 to clamp the connecting block 2 402, thus completing the fixation of the heat dissipation shell 1. With the help of the self-locking characteristics of the worm gear 408 and the worm wheel 406, the cam 407 can be prevented from reversing, ensuring the stability and reliability of the fixed structure.

[0033] In the second stage, heat dissipation operation: the air inlet pipe 206 is connected to an external cold air source. After the cold air source is turned on, the cooling gas is injected into the middle of the second ventilation slot 202 from the air inlet pipe 206, and then flows to both ends of the second ventilation slot 202. During this process, the heat generated by the LED light strip 3 conducted by the heat-conducting plate 207 is carried away. At the same time, some of the cooling gas enters the middle of the first ventilation slot 201 through the connecting square pipe 205 and flows to both ends of the first ventilation slot 201. It flows slowly in the bent passage formed by the tail of the heat-conducting plate 204, and fully absorbs the heat conducted by the heat-conducting plate 204. After completing the heat exchange, the cooling gas is finally discharged from the stainless steel filter plate 103 of the shell cover 102, forming a complete heat dissipation cycle and continuously cooling the LED light strip.

[0034] The third stage is disassembly and adjustment: When it is necessary to adjust the installation position of the LED light strip or replace the LED light strip, rotate the handle of the worm gear 408 in the opposite direction, which will drive the worm wheel 406, the rotating shaft 405 and the cam 407 to reverse, and the spring 410 will return to its natural state, pushing the moving block 409 to move back; during the reset process of the moving block 409, the inclined slider 411 will drive the two clamping blocks 412 to retract to the middle, loosening the clamping of the connecting block 402. At this time, the heat sink 1 can be removed from the fixed shell 403 for subsequent adjustment or replacement operations.

[0035] The following are alternative embodiments of the present invention, which are optimized and adjusted based on the basic embodiments to adapt to different usage requirements: Alternative embodiment 1: The number and spacing of the heat-conducting inserts 204 can be flexibly adjusted according to the power of the LED light strip 3. The greater the power of the LED light strip, the smaller the spacing and the more numerous the heat-conducting inserts 204 should be, to ensure that the heat dissipation capacity matches the heat generation of the LED light strip. The air inlet pipe 206 can be selected to connect to different types of cold air sources such as fans or air conditioning ducts according to the actual heat dissipation requirements, thereby improving the adaptability of the device.

[0036] Alternative embodiment 2: A temperature sensor can be installed inside the heat dissipation housing 1. The temperature sensor is electrically connected to the controller. The controller realizes the automatic start and stop of the cold air source and the adjustment of the fan speed, so that the heat dissipation effect matches the actual heating state of the LED light strip in real time, further improving the automation level of the device and achieving energy saving effect at the same time.

[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A composite LED light strip heat dissipation structure, characterized in that: It includes a heat sink (1), an LED light strip (3), and a heat dissipation component (2); The heat sink (1) is a U-shaped shell with shell covers (102) snapped at both ends. The LED light strip (3) is placed at the U-shaped opening of the heat sink (1) and is axially fixed by the shell covers (102) at both ends. The heat dissipation assembly (2) is arranged around the outside of the LED light strip (3), including ventilation slot one (201), ventilation slot two (202), air inlet pipe (206), heat conduction plate (207), connecting square tube (205), several slots (203) and several heat conduction inserts (204); ventilation slot one (201) is opened inside the side walls of both sides of the heat dissipation shell (1), and is horizontally connected to the side shell covers (102); ventilation slot two (202) is opened inside the bottom side wall of the heat dissipation shell (1), and is horizontally connected to the side shell covers (102); air inlet pipe (206) is fixed to the center of the bottom of the heat dissipation shell (1), and is connected to ventilation slot two (202) for connecting to an external cold air source. The heat-conducting plate (207) covers the inner wall of the U-shaped bottom of the heat sink (1), and the bottom is directly connected to the second ventilation slot (202). The LED light strip (3) is located on the top of the heat-conducting plate (207). The connecting square tube (205) connects the middle of the first ventilation slot (201) and the second ventilation slot (202) so that the two are connected. The slot (203) is opened on the inner wall of the U-shaped sides of the heat sink (1), passes through the heat sink (1) and is connected to the first ventilation slot (201), and is arranged linearly on both sides of the LED light strip (3) with one above and one below. The heat-conducting insert (204) is inserted into the slot (203), and the tail extends into the first ventilation slot (201) and is arranged alternately with one above and one below to form a bent cold air passage.

2. The composite LED light strip heat dissipation structure according to claim 1, characterized in that: It also includes a fixing component (4), which includes a connecting block one (401), a connecting block two (402), a fixing shell (403), a fixing block (404), a rotating shaft (405), a worm gear (406), a cam (407), a worm (408), a moving block (409), a spring (410), two sliders (411), and two clamping blocks (412); the connecting block one (401) is fixed to the bottom of the heat sink shell (1), and the end is hinged to the connecting block two (402); the fixing shell (403) has an opening on one side, and a fixing block (404) with a threaded hole is fixed on the outer wall; the rotating shaft (405) is rotatably installed inside the fixing shell (403), and the cam (407) and the worm gear (404) are fixed on the outer wall in sequence. 406); The worm (408) is rotatably mounted on the side wall of the fixed shell (403) and meshes with the worm wheel (406); The moving block (409) is slidably mounted inside the fixed shell (403) and fits against the cam (407), and a spring (410) is provided between it and the inner wall of the fixed shell (403); The moving block (409) has oblique sliders (411) fixed on both sides, and the clamping block (412) is slidably sleeved on both sides of the moving block (409), and the surface has a groove that matches the slider (411); When the connecting block two (402) is inserted into the fixed shell (403), the cam (407) rotates and drives the moving block (409) to move, and the slider (411) drives the clamping block (412) to open and clamp the connecting block two (402) to both sides.

3. The composite LED light strip heat dissipation structure according to claim 1, characterized in that: The heat sink (1) has slots (101) on the outer walls of both ends, and the cover (102) is fixed to the heat sink (1) by the slots (101).

4. The composite LED light strip heat dissipation structure according to claim 1, characterized in that: The shell cover (102) has three through grooves on its surface, which are connected to two ventilation grooves (201) and ventilation groove (202) respectively. A filter plate (103) is fixed in the through groove.

5. The composite LED light strip heat dissipation structure according to claim 2, characterized in that: The bottom of the heat sink (1) is fixed with a lead tube (104), which passes through the heat conduction plate (207), the second ventilation slot (202) and the bottom outer wall of the heat sink (1) in sequence, for the wiring of the LED light strip (3).

6. The composite LED light strip heat dissipation structure according to claim 1, characterized in that: The air inlet pipe (206) is welded and fixed to the center of the U-shaped bottom of the heat dissipation shell (1) and communicates with the middle of the ventilation slot (202). The external cold air source injects cooling gas into the ventilation slot (202) through the air inlet pipe (206).

7. The composite LED light strip heat dissipation structure according to claim 2, characterized in that: The worm (408) meshes with the worm wheel (406), and rotating the worm (408) causes the worm wheel (406) and the shaft (405) to rotate, preventing loosening.

8. The composite LED light strip heat dissipation structure according to claim 2, characterized in that: The hinge joint between the first connecting block (401) and the second connecting block (402) is provided with a locking structure, which can adjust and lock the installation angle of the heat sink (1) to adapt to different installation scenarios.

9. The composite LED light strip heat dissipation structure according to claim 2, characterized in that: The clamping block (412) has several transverse anti-slip grooves on the side facing the inner wall of the fixed shell (403) to increase the contact friction with the connecting block (402) and improve the clamping firmness.

10. The composite LED light strip heat dissipation structure according to claim 1, characterized in that: After the cover (102) is snapped onto both ends of the heat sink (1), its inner end face abuts against both ends of the LED light strip (3) to achieve axial positioning and fixation of the LED light strip (3) and prevent it from moving.

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