Modular direct current powered LED lighting device

Abstract

The utility model belongs to LED lighting technical field especially relates to a kind of modular direct current power supply LED lighting device.The device includes heat dissipation shell, control module, light source module, light distribution light efficiency module and rotating fixed head.Light source module mounting cavity and control module mounting cavity are equipped in the inside of heat dissipation shell, and first arc surface with first meshing tooth is equipped on connecting portion.Rotating fixed head is equipped with second arc surface with second meshing tooth, first meshing tooth is engaged with second meshing tooth, and angle is fixed by adjusting bolt.The utility model strengthens the locking force of angle adjustment by meshing tooth structure, effectively solve the problem that angle adjustment mechanism is easy to loosen in prior art in vibration environment, improve the stability and reliability of lighting angle, reduce the need of frequent correction.At the same time, the device uses modular design, integrates heat dissipation and waterproof function, applicable to industrial lighting, stage lighting and other various occasions.

Description

Technical Field

[0001] This utility model belongs to the field of LED lighting technology, and in particular relates to a modular DC-powered LED lighting device. Background Technology

[0002] In various applications such as industrial lighting, stage lighting, machine work lights, marine lighting, and mining lighting, luminaires with adjustable illumination angles are typically required to meet the lighting needs of different areas and tasks. Currently, angle-adjustable luminaires on the market, especially LED luminaires using DC power, generally employ bolt-fastening with hinged or ball-joint connections for their angle adjustment mechanisms. Specifically, this involves tightening a single bolt, utilizing the axial pressure generated by the bolt to press against mating friction plates or joint components, and using the static friction between these components to fix the angle of the luminaire. However, the above-mentioned existing technology reveals significant shortcomings in practical applications, especially under long-term vibration or impact conditions. Its main deficiency lies in the fact that, under continuous vibration environments such as equipment operation, vehicle movement, or mechanical vibration, the adjusting bolt is subject to alternating loads and periodic vibrations, making it prone to "creep" and "loosening." This physical phenomenon causes the bolt preload to gradually decrease, weakening the clamping force between the friction plates or joint components, and consequently reducing the static friction. The direct consequence is that the originally fixed angle of the light fixture will slowly and spontaneously shift, causing the beam to deviate from the preset illumination area. Due to this loosening, users need to frequently and repeatedly check and re-tighten and adjust the illumination angle of the light fixture to ensure the lighting effect, thus affecting the user experience. Utility Model Content

[0003] In view of this, the present invention provides a modular DC-powered LED lighting device to solve the problem of insufficient stability of the angle adjustment mechanism of the lighting device in the prior art.

[0004] The technical solution adopted in this utility model is as follows: This utility model provides a modular DC-powered LED lighting device, comprising: The heat sink has a light source module mounting cavity and a control module mounting cavity arranged along its length. The light source module mounting cavity and the control module mounting cavity are connected. A connecting part is provided on the outer side wall of the heat sink near the control module mounting cavity along its length. The connecting part has symmetrical arc-shaped first arc surfaces at both ends along the width direction of the heat sink. A plurality of first meshing teeth are provided on the first arc surfaces. A control module is located inside the control module mounting cavity. The control module includes a control board and a power adjustment module and a color temperature adjustment module located on the control board. The power adjustment module and the color temperature adjustment module are used to control and adjust the power and color temperature of the lighting device. The control module is electrically connected to a DC power supply. A light source module is disposed inside the light source module mounting cavity and is electrically connected to the control module. The light source module is provided with a light-emitting unit. A light distribution module is disposed on the end face of the heat sink, and a lens is provided on the light distribution module, which cooperates with the light-emitting unit; A rotating fixing head is provided on the connecting part. The position where the rotating fixing head connects to the connecting part is provided with a second arc surface. A plurality of second meshing teeth that cooperate with the first meshing teeth are symmetrically provided on the second arc surface. The first meshing teeth and the second meshing teeth mesh with each other.

[0005] Preferably, a first heat sink is provided on the end face of the heat sink away from the mounting cavity of the light source module, and a plurality of the first heat sinks are arranged parallel to each other along the width direction of the heat sink, and the length of each first heat sink is the same as the length of the mounting cavity of the light source module.

[0006] Preferably, the mounting cavity of the light source module is provided with a boss, and a plurality of bosses are arranged parallel to each other along the length direction of the heat sink. A groove is formed between every two adjacent bosses and the mounting cavity of the light source module. The groove is used to temporarily store the heat on the light source module. Heat dissipation cavities are also symmetrically provided at both ends of the mounting cavity of the light source module along the length direction of the bosses. A second heat dissipation fin is provided in the heat dissipation cavity. A plurality of second heat dissipation fins are arranged parallel to each other along the length direction of the heat dissipation cavity. A partition groove is formed between every two adjacent second heat dissipation fins and the inner wall of the heat dissipation cavity.

[0007] Preferably, a waterproof adhesive strip mounting groove is provided inside the heat sink along the outer contour of the light source module mounting cavity and the control module mounting cavity, and a pair of abutment platforms are provided on both sides of the waterproof adhesive strip mounting groove.

[0008] Preferably, the device further includes a waterproof adhesive strip, which is disposed within the waterproof adhesive strip mounting groove. The waterproof adhesive strip comprises a first part and a second part, which are perpendicularly connected to each other. The first part and the second part are integrally formed and constitute a T-shaped structure. The first part of the adhesive strip has symmetrical abutment surfaces on both sides of the connection position with the second part of the adhesive strip. The end face of the first part of the adhesive strip away from the second part of the adhesive strip is a pressing surface, which is used to abut against the light distribution optical module. The symmetrical abutment surfaces abut against the symmetrical abutment platforms. The second part of the adhesive strip is placed within the waterproof adhesive strip mounting groove.

[0009] Preferably, the rotating fixing head includes an adjusting part and a fixing part. The adjusting part is symmetrically provided with an extension part. The second arc surface is provided on the extension part. An adjusting hole is provided on each second arc surface along its length direction. The adjusting hole is elongated on the second arc surface and located at the middle position in the width direction of the second arc surface. Two adjusting holes are symmetrically arranged on the two extension parts respectively. The second meshing teeth are arranged in pairs on each second arc surface between the two sides of the adjusting hole. An adjusting threaded hole is provided on the first arc surface at the position corresponding to the adjusting hole. After the first meshing teeth and the second meshing teeth mesh, the rotating fixing head is fixed by connecting an adjusting bolt on the adjusting threaded hole. The angle of the heat sink is adjusted by the different meshing angles of the first meshing teeth and the second meshing teeth, thereby realizing the adjustment of the lighting angle.

[0010] Preferably, the light source module includes a lamp board and light-emitting units disposed on the lamp board. A plurality of light-emitting units are arranged in a rectangular array on the lamp board. One end face of the lamp board away from the light-emitting units abuts against the boss and is fixedly connected to the mounting cavity of the light source module by screws.

[0011] Preferably, the control module mounting cavity is provided with a control module housing, the control module is placed inside the control module housing, and the upper end of the control module is provided with a control module cover, which is connected to the control module housing.

[0012] Preferably, the light distribution module includes a control unit and a light transmission unit. The control unit is equipped with a control display screen. A rectangular array of lenses is located in the light transmission unit. Each light-emitting unit has a corresponding lens. The control display screen is electrically connected to the control module.

[0013] Preferably, the rotating fixing head has a fixing hole on the fixing part, and the modular DC-powered LED lighting device is positioned through the fixing hole. The rotating fixing head has a power connector at the position between the fixing hole and the adjusting part. A waterproof fixing head mounting hole is provided on the side wall of the connecting part at the position between two symmetrically arranged first meshing teeth. A waterproof fixing head is provided in the waterproof fixing head mounting hole. After the DC power supply is fixed through the power connector, it passes through the waterproof fixing head and is electrically connected to the control module.

[0014] In summary, the beneficial effects of this application are as follows: This invention utilizes a first and a second meshing tooth on the first arc surface of the connecting part and the second arc surface of the rotating fixing head, respectively, to achieve stable adjustment and locking of the device's lighting angle. This is a rigid locking mechanism based on surface contact, offering higher reliability and resistance to loosening compared to traditional bolt-based surface clamping methods that rely on static friction between friction plates. In continuous vibration environments, the preload of traditional bolts decays, causing angle shifts. However, with this invention's toothed meshing structure, even a slight decrease in the preload of the adjusting bolt will not change the angle as long as the teeth remain engaged, fundamentally overcoming "creep" and "slackness" phenomena. Users can adjust the lamp to a specific angle and lock it securely as needed, ensuring a stable beam pointing towards the preset area over a long period without frequent checks and retightening, greatly improving the user experience. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of this application.

[0016] Figure 1 A three-dimensional exploded view of the modular DC-powered LED lighting device provided by this utility model; Figure 2 A first-view three-dimensional structural diagram of the modular DC-powered LED lighting device provided by this utility model; Figure 3 A second-view three-dimensional structural diagram of the modular DC-powered LED lighting device provided by this utility model; Figure 4 The modular DC-powered LED lighting device provided by this utility model includes... Figure 1 Enlarged view of point A in the image; Figure 5 The modular DC-powered LED lighting device provided by this utility model includes... Figure 1 Enlarged view of point B in the image; Figure 6 The modular DC-powered LED lighting device provided by this utility model includes... Figure 1 Enlarged view of point C in the image; Figure 7 A cross-sectional view of the waterproof adhesive strip in the modular DC-powered LED lighting device provided by this utility model; Figure 8 A three-dimensional structural diagram of the rotary fixed joint in the modular DC-powered LED lighting device provided by this utility model; Figure 9A three-dimensional structural diagram of the light distribution and luminous efficacy module in the modular DC-powered LED lighting device provided by this utility model.

[0017] The components and their numbers shown in the picture: 1. Heat sink cassette; 2. Control module housing; 3. Control module top cover; 4. Light distribution and light effect module; 5. Light source module; 6. Waterproof adhesive strip; 7. Waterproof fixing head; 8. Rotating fixing head; 9. Light source module mounting cavity; 11. Boss; 111. Groove; 112. Control module mounting cavity; 12. Heat sink cavity; 13. Second heat sink; 131. Separating groove; 132. Waterproof adhesive strip mounting groove; 14. Abutment platform; 141. Connecting part; 15. First meshing tooth; 151. Waterproof fixing head mounting hole; 152. First heat sink; 16. Ventilation groove; 17. Control part; 51. Control display screen; 511. Light transmission part; 52. Lens; 521. Through hole; 53. Light emission unit; 61. Lamp board; 62. First adhesive strip; 71. Abutment surface; 711. Pressing surface; 712. Second adhesive strip; 72. Adjustment part; 91. Fixing hole; 92. Extension part; 93. Adjustment hole; 931. Adjustment bolt; 9311. Second meshing tooth; 932. Power cord connector; 94. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Unless otherwise specified, embodiments of the present invention and the various features thereof can be combined with each other, all within the protection scope of the present invention.

[0019] Example 1 See Figures 1-9 This utility model provides a modular DC-powered LED lighting device, including a heat sink 1, a control module 2, a light distribution module 5, a light source module 6, and a rotating fixing head 9. The heat sink 1 has a light source module mounting cavity 11 and a control module mounting cavity 12 along its length, which are connected. A connecting portion 15 is provided on the outer wall of the heat sink 1 near the control module mounting cavity 12 along its length. The connecting portion 15 has symmetrically formed first arc surfaces at both ends along the width direction of the heat sink 1, and several first meshing teeth 151 are provided on the first arc surfaces. The control module 2 is located inside the control module mounting cavity 12, and includes a control board and a power adjustment module and a color adjustment module mounted on the control board. Temperature regulation: The power regulation module and color temperature regulation module are used to control and regulate the power and color temperature of the lighting device. The control module is electrically connected to a DC power supply. The light source module 6 is located in the light source module mounting cavity 11 and is electrically connected to the control module 2. The light source module 6 is provided with a light-emitting unit 61. The light distribution effect module 5 is located on the end face of the heat sink 1. The light distribution effect module 5 is provided with a lens 521, which cooperates with the light-emitting unit 61. The rotating fixing head 9 is located on the connecting part 15. The position where the rotating fixing head 9 connects to the connecting part 15 is provided with a second arc surface. Several second meshing teeth 932 that cooperate with the first meshing teeth 151 are symmetrically provided on the second arc surface. The first meshing teeth 151 and the second meshing teeth 932 mesh with each other.

[0020] By setting a first meshing tooth 151 and a second meshing tooth 932 on the first arc surface of the connecting part 15 and the second arc surface of the rotating fixing head 9 respectively, the device's lighting angle can be stably adjusted and locked using the first meshing tooth 151 and the second meshing tooth 932. This is a rigid locking method based on surface contact, which has higher reliability and anti-loosening ability compared to the traditional bolt method that relies on the static friction between friction plates. In a continuous vibration environment, the preload of traditional bolts will decay, causing angle deviation. However, with the tooth meshing structure of this utility model, even if the preload of the adjusting bolt decreases slightly, the angle will not change as long as the teeth do not disengage, fundamentally overcoming the phenomena of "creep" and "loosening". Users can adjust the lamp to a specific angle as needed and lock it firmly, ensuring that the beam is stably pointing to the preset area for a long time without the need for frequent checks and retightening, greatly improving the user experience.

[0021] The heat sink 1 has a first heat sink 16 on one end face away from the light source module mounting cavity 11. Several first heat sinks 16 are arranged parallel to each other along the width direction of the heat sink 1. The length of each first heat sink 16 is the same as the length of the light source module mounting cavity 11. Every two adjacent first heat sinks 17 form a ventilation groove 17 with the outer wall of the heat sink 1. By placing the first heat sinks 16 on the outside of the light source module mounting cavity, the heat generated on the light source module 6 can be discharged to the external environment through the shortest path, reducing the residence time of heat in the light source module mounting cavity, thereby effectively improving the service life of the light source module 2 and thus improving product quality.

[0022] In this embodiment, a boss 111 is provided in the light source module mounting cavity 11. Several bosses 111 are arranged parallel to each other along the length of the heat dissipation shell 1. A groove 112 is formed between every two adjacent bosses 111 and the light source module mounting cavity 11. The groove 112 is used to temporarily store the heat on the light source module 6. Heat dissipation cavities 13 are also symmetrically provided at both ends of the light source module mounting cavity 11 along the length of the bosses 112. A second heat dissipation fin 131 is provided in the heat dissipation cavity 13. Several second heat dissipation fins 131 are arranged parallel to each other along the length of the heat dissipation cavity 13. A partition groove 132 is formed between every two adjacent second heat dissipation fins 131 and the inner wall of the heat dissipation cavity 13. The design of the partition groove 132 and the second heat dissipation fins 131 provides a larger heat dissipation area for the heat generated by the light source module 6 in the heat dissipation shell 1. Except for the end face where the light-emitting unit 61 is installed, the other surfaces of the light source module 6 are all placed in the heat dissipation area, so that the heat inside the shell can be dissipated to the outside in a timely manner through the heat dissipation area, thereby improving the heat dissipation performance of the device and extending the product life.

[0023] The outer side of the heat sink 1 is provided with a first heat sink 16, which provides a large effective heat dissipation area and can quickly dissipate heat into the surrounding air. The boss 111 in the light source module mounting cavity 11 forms a groove 112 with the cavity. These grooves 112 can serve as a "temporary storage area" for heat, preventing heat from accumulating instantly. At the same time, the boss 111 is in direct contact with the light source module 6, providing an efficient heat conduction path. The heat dissipation cavities 13 located at both ends and the second heat sink 131 and partition groove 132 inside them effectively increase the internal airflow space and heat dissipation surface area, forming an efficient chimney effect, enhancing the convection and exchange of internal hot air, thereby improving the overall heat dissipation efficiency.

[0024] Inside the heat sink 1, along the outer contours of the light source module mounting cavity 11 and the control module mounting cavity 13, a communicating waterproof adhesive strip mounting groove 14 is provided. Pairs of abutment platforms 141 are provided on both sides of the waterproof adhesive strip mounting groove 14. In this embodiment, the modular DC-powered LED lighting device also includes a waterproof adhesive strip 7, which is disposed within the waterproof adhesive strip mounting groove 14. The waterproof adhesive strip 7 includes a first part 71 and a second part 72, which are perpendicularly connected to each other. The first part 71 and the second part 72 are integrally formed and constitute a T-shaped structure. The first part 71 has symmetrical abutment surfaces 711 on both sides of its connection point with the second part 72. The end face of the first part 71 away from the second part 72 is a pressing surface 712, which is used to abut against the light distribution optical module 5. The symmetrical abutment surfaces 711 and symmetrical... The abutting platform 141 abuts against each other, and the two parts of the adhesive strip 72 are placed in the waterproof adhesive strip installation groove 14. The specially designed T-shaped waterproof adhesive strip 7 cooperates with the waterproof adhesive strip installation groove 14 with the abutting platform 141. The two parts of the adhesive strip 72 are placed in the groove to provide basic compression seal. The abutting surfaces 711 on both sides of the adhesive strip 71 abut against the abutting platform 141 to form a lateral seal. The pressing surface 712 at the end of the adhesive strip 71 presses against the light distribution module 5 to form an end face seal. This multi-directional, multi-contact sealing design ensures that the lamp can maintain good sealing performance in harsh environments such as industry, ships, and mines that are humid, dusty, or require washing, and prevents water vapor and dust from entering.

[0025] The rotating fixing head 9 includes an adjusting part 91 and a fixing part. The adjusting part 91 is symmetrically provided with an extension part 93. The second arc surface is provided on the extension part 93. An adjusting hole 931 is provided on each second arc surface along its length direction. The adjusting hole 931 is elongated on the second arc surface and is located at the middle position in the width direction of the second arc surface. Two adjusting holes 931 are symmetrically arranged on the two extension parts 93 respectively. The second meshing teeth 932 are arranged in pairs on each second arc surface between the two sides of the adjusting hole 931. An adjusting threaded hole is provided on the first arc surface at the position corresponding to the adjusting hole 931. After the first meshing tooth 151 and the second meshing tooth 932 mesh, the rotating fixing head 9 is fixed by connecting the adjusting bolt 9311 on the adjusting threaded hole. The angle of the heat sink 1 is adjusted by the different meshing angles of the first meshing tooth 151 and the second meshing tooth 932, thereby realizing the adjustment of the lighting angle.

[0026] The light source module 6 includes a lamp plate 62 and light-emitting units 61 disposed on the lamp plate 62. A plurality of light-emitting units 62 are arranged in a rectangular array on the lamp plate 62. One end face of the lamp plate 62 away from the light-emitting units 61 abuts against the boss 111 and is fixedly connected to the light source module mounting cavity 11 by screws. By abutting the boss 111 with one end of the lamp plate 62 away from the light-emitting units 61, heat flow can be better achieved at the position where the lamp plate 62 has no contact with the boss 111.

[0027] The control module mounting cavity 12 is provided with a control module housing 3, the control module 2 is placed in the control module housing 3, and the upper end of the control module 2 is provided with a control module cover 4, which is connected to the control module housing 3.

[0028] The light distribution and light effect module 5 includes a control unit 51 and a light transmission unit 52. The control unit 51 is provided with a control display screen 511. A rectangular array of lenses 521 is located in the light transmission unit 52. Each light-emitting unit 61 has a corresponding lens 521. The control display screen 511 is electrically connected to the control module 2.

[0029] The rotating fixing head 9 has a fixing hole 92 on the fixing part. The modular DC-powered LED lighting device is positioned through the fixing hole 92. The rotating fixing head 9 has a power connector 94 between the fixing hole 92 and the adjusting part 91. The connecting part 15 has a waterproof fixing head mounting hole 152 on its side wall between two symmetrically arranged first meshing teeth 151. A waterproof fixing head 8 is provided on the waterproof fixing head mounting hole 152. After being fixed by the power connector 94, the DC power supply passes through the waterproof fixing head 8 and is electrically connected to the control module 2.

[0030] This invention creatively solves the core problems of existing adjustable-angle LED lamps, such as easy loosening under vibration, poor heat dissipation, and poor sealing, through a toothed angle locking mechanism, a multi-stage high-efficiency heat dissipation system, an innovative T-shaped sealing structure, and a modular design. It provides a high-quality lighting device solution that is stable and reliable in angle, has a long service life, good environmental adaptability, and is easy to maintain and intelligently control.

[0031] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A modular DC-powered LED lighting device, characterized in that, include: The heat sink has a light source module mounting cavity and a control module mounting cavity arranged along its length. The light source module mounting cavity and the control module mounting cavity are connected. A connecting part is provided on the outer side wall of the heat sink near the control module mounting cavity along its length. The connecting part has symmetrical arc-shaped first arc surfaces at both ends along the width direction of the heat sink. A plurality of first meshing teeth are provided on the first arc surfaces. A control module is located inside the control module mounting cavity. The control module includes a control board and a power adjustment module and a color temperature adjustment module located on the control board. The power adjustment module and the color temperature adjustment module are used to control and adjust the power and color temperature of the lighting device. The control module is electrically connected to a DC power supply. A light source module is disposed inside the light source module mounting cavity and is electrically connected to the control module. The light source module is provided with a light-emitting unit. A light distribution module is disposed on the end face of the heat sink, and a lens is provided on the light distribution module, which cooperates with the light-emitting unit; A rotating fixing head is provided on the connecting part. The position where the rotating fixing head connects to the connecting part is provided with a second arc surface. A plurality of second meshing teeth that cooperate with the first meshing teeth are symmetrically provided on the second arc surface. The first meshing teeth and the second meshing teeth mesh with each other.

2. The modular DC-powered LED lighting device according to claim 1, characterized in that, The heat sink is provided with a first heat sink on one end face away from the light source module mounting cavity. Several first heat sinks are arranged parallel to each other along the width direction of the heat sink, and the length of each first heat sink is the same as the length of the light source module mounting cavity.

3. The modular DC-powered LED lighting device according to claim 2, characterized in that, The mounting cavity of the light source module is provided with a boss. Several bosses are arranged parallel to each other along the length of the heat sink. A groove is formed between every two adjacent bosses and the mounting cavity of the light source module. The groove is used to temporarily store the heat on the light source module. Heat dissipation cavities are also symmetrically provided at both ends of the mounting cavity of the light source module along the length of the bosses. A second heat dissipation fin is provided in the heat dissipation cavity. Several second heat dissipation fins are arranged parallel to each other along the length of the heat dissipation cavity. A partition groove is formed between every two adjacent second heat dissipation fins and the inner wall of the heat dissipation cavity.

4. The modular DC-powered LED lighting device according to claim 1, characterized in that, Inside the heat sink housing, along the outer contours of the light source module mounting cavity and the control module mounting cavity, there are communicating waterproof adhesive strip mounting grooves, and on both sides of the waterproof adhesive strip mounting grooves are paired abutment platforms.

5. The modular DC-powered LED lighting device according to claim 4, characterized in that, It also includes a waterproof adhesive strip, which is disposed in the waterproof adhesive strip mounting groove. The waterproof adhesive strip includes a first part and a second part, which are perpendicularly connected to each other. The first part and the second part are integrally formed and form a T-shaped structure. The first part of the adhesive strip has symmetrical abutment surfaces on both sides of the connection position with the second part of the adhesive strip. The end face of the first part of the adhesive strip away from the second part of the adhesive strip is a pressing surface, which is used to abut against the light distribution and light effect module. The symmetrical abutment surfaces abut against the symmetrical abutment platforms. The second part of the adhesive strip is placed in the waterproof adhesive strip mounting groove.

6. The modular DC-powered LED lighting device according to claim 1, characterized in that, The rotating fixing head includes an adjusting part and a fixing part. The adjusting part is symmetrically provided with an extension part. The second arc surface is provided on the extension part. An adjusting hole is provided on each second arc surface along its length direction. The adjusting hole is elongated on the second arc surface and located at the middle position in the width direction of the second arc surface. Two adjusting holes are symmetrically arranged on the two extension parts respectively. The second meshing teeth are arranged in pairs on each second arc surface between the two sides of the adjusting hole. An adjusting threaded hole is provided on the first arc surface at the position corresponding to the adjusting hole. After the first meshing teeth and the second meshing teeth mesh, the rotating fixing head is fixed by connecting the adjusting bolt on the adjusting threaded hole. The angle of the heat sink is adjusted by the different meshing angles of the first meshing teeth and the second meshing teeth, thereby realizing the adjustment of the lighting angle.

7. The modular DC-powered LED lighting device according to claim 3, characterized in that, The light source module includes a lamp board and light-emitting units disposed on the lamp board. A plurality of light-emitting units are arranged in a rectangular array on the lamp board. One end face of the lamp board away from the light-emitting units abuts against the boss and is fixedly connected to the mounting cavity of the light source module by screws.

8. The modular DC-powered LED lighting device according to claim 1, characterized in that, The control module mounting cavity is provided with a control module housing, the control module is placed inside the control module housing, and the upper end of the control module is provided with a control module cover, which is connected to the control module housing.

9. The modular DC-powered LED lighting device according to claim 7, characterized in that, The light distribution and light effect module includes a control unit and a light transmission unit. The control unit is equipped with a control display screen. A rectangular array of lenses is located in the light transmission unit. Each light-emitting unit has a corresponding lens. The control display screen is electrically connected to the control module.

10. The modular DC-powered LED lighting device according to claim 6, characterized in that, The rotating fixing head has a fixing hole on the fixing part. The modular DC-powered LED lighting device is positioned through the fixing hole. The rotating fixing head has a power connector between the fixing hole and the adjusting part. A waterproof fixing head mounting hole is provided on the side wall of the connecting part between two symmetrically arranged first meshing teeth. A waterproof fixing head is provided in the waterproof fixing head mounting hole. After being fixed by the power connector, the DC power supply passes through the waterproof fixing head and is electrically connected to the control module.

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