Illuminating device with light source plate positioning structure

Abstract

The utility model discloses a lighting device with a light source plate positioning structure, and relates to the technical field of lighting. The LED lamp comprises a heat sink plate, a light source plate and a clamping assembly corresponding to the light source plate, an adjusting groove is formed in the heat sink plate, a connecting frame is arranged on the lower side of the heat sink plate, a controller corresponding to the light source plate is arranged on the lower side of the adjusting groove, and a lampshade is in sliding fit with the lower portion of the connecting frame. The clamping assembly comprises a fixing rod arranged between the upper side and the lower side of the adjusting groove and two sliding plates arranged in the adjusting groove in a sliding fit mode, and a rotating plate is arranged on the peripheral side of the fixing rod in a rotating fit mode. Through cooperation of the rotating plate and the connecting plate, the sliding plate is conveniently pushed and pulled to drive the sliding block and the L-shaped supporting plates to move, so that the two L-shaped supporting plates get close to each other or get away from each other, the two sides of a light source plate are conveniently and accurately clamped and positioned, clamping symmetry and structural stability are improved, and the clamping efficiency is improved. And meanwhile, elastic sliding of the sliding block is combined with limiting constraint of the L-shaped supporting plate.

Description

Technical Field

[0001] This utility model belongs to the field of lighting, and specifically relates to a lighting device with a light source plate positioning structure. Background Technology

[0002] A lighting device with a light source plate positioning structure is a lighting equipment that achieves precise alignment and stable fixation of the light source plate and the heat sink plate through mechanical positioning design.

[0003] Chinese Patent No. CN204026535U discloses a light source plate positioning structure and lighting device, including: a positioning hole provided on the light source plate and a positioning post provided on the heat sink plate; the positioning hole of the light source plate passes through the positioning post of the heat sink plate and is attached to the heat sink plate.

[0004] The light source board positioning structure and lighting device disclosed in the application are prone to breakage when the positioning post is stamped from the material of the heat sink plate itself, which is easy to cause the positioning post to break during the maintenance and replacement of the light source board. This requires the entire heat sink plate to be replaced, which increases the maintenance cost of the lighting device and reduces the probability of the lighting device being repairable. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a lighting device with a light source plate positioning structure, thereby solving the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0007] A lighting device with a light source plate positioning structure includes: a heat sink plate, a light source plate, and a clamping assembly corresponding to the light source plate. The light source plate is located on the lower side of the heat sink plate. The heat sink plate has an adjustment groove and a connecting frame installed on its lower side. The connecting frame is located on the periphery of the light source plate. A controller corresponding to the light source plate is provided on the lower side of the adjustment groove. A lampshade is slidably fitted on the lower part of the connecting frame. The light source plate is located between the heat sink plate and the lampshade.

[0008] The clamping assembly includes a fixed rod installed between the upper and lower sides of the adjustment groove and two sliding plates slidably engaged within the adjustment groove. A rotating plate is rotatably engaged around the fixed rod. The rotating plate is located on the side of the controller. Both the rotating plate and the controller are located between the two sliding plates. Connecting plates are rotatably engaged on both sides of the rotating plate. The fixed rod is located between the two connecting plates. The end of the connecting plate away from the rotating plate is rotatably engaged on one side of the sliding plate. Two sliders are installed on the lower side of the sliding plate. The sliders slide elastically under the heat sink plate. L-shaped support plates are installed on the lower side of the corresponding two sliders. The two L-shaped support plates are distributed in a mirror symmetrical manner. The two sides of the light source plate are respectively clamped into one of the L-shaped support plates.

[0009] Optionally, the connecting frame has a groove on one side, two extension plates, and two pins. The groove horizontally penetrates the hollow area of ​​the connecting frame, and the lampshade slides in the groove. The groove is located between the upper and lower extension plates, and the lower part of the pins vertically penetrates the two extension plates.

[0010] Optionally, the heat sink plate has two sliding grooves on its lower side, which are connected to the adjustment groove. The slider slides elastically in the corresponding sliding groove. A guide rod is installed between the two sides of the sliding groove, and the guide rod passes through the two corresponding sliders laterally.

[0011] Optionally, a spring is installed between the slider and one side of the corresponding slide groove, and the spring is sleeved around the corresponding guide rod.

[0012] Optionally, a bearing is installed around the fixed rod, and a rotating plate is installed around the bearing.

[0013] Optionally, a rubber pad 1 is installed on one side of the inner wall of the L-shaped support plate, and a rubber pad 2 is installed on the lower side of the inner wall. The two sides of the light source plate respectively abut against the corresponding rubber pad 1, and the rubber pad 2 is located on the lower side of the light source plate.

[0014] Optionally, two fixing plates are installed on one side of the skateboard. The fixing plates are located between the skateboard and the turntable. A fixing rod is provided between the upper and lower fixing plates. One end of the connecting plate is rotatably fitted around the corresponding fixing rod.

[0015] Optionally, two fixing plates are installed on both sides of the rotating plate, and a fixing rod is provided between the upper and lower fixing plates. The end of the connecting plate away from the sliding plate is rotatably engaged with the corresponding fixing rod around its perimeter.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:

[0017] By using a rotating plate and a connecting plate in combination, the sliding plate can be pushed and pulled to move the slider and the L-shaped support plate, thereby allowing the two L-shaped support plates to move closer or further apart. This facilitates precise clamping and positioning of both sides of the light source plate, improving clamping symmetry and structural stability. At the same time, the elastic sliding of the slider combined with the limiting constraint of the L-shaped support plate improves the convenience and stability of clamping the light source plate, increases the maintenance efficiency of the light source plate, and thus optimizes the overall structural practicality and user experience of the lighting device.

[0018] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0020] In the picture:

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the lampshade;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the light source board;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the heat sink plate;

[0024] Figure 4 This is a schematic diagram of the cross-sectional structure of the regulating channel.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] Heat sink plate 1, light source plate 2, connecting frame 3, controller 4, lampshade 5, fixing rod 6, rotating plate 7, connecting plate 8, sliding plate 9, spring 10, slider 11, L-shaped support plate 12, extension plate 13, guide rod 16, fixing plate one 17, fixing plate two 18.

[0027] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] In the design and manufacturing of lighting devices, the positioning structure of the light source board is a key component for achieving efficient heat dissipation, stable light output, and convenient maintenance. With the widespread adoption of LED technology, light source boards typically consist of multiple LED beads integrated onto a substrate. The precision and stability of their installation directly affect the lighting effect and lifespan. Existing technologies employ various positioning methods for light source boards, primarily encompassing mechanical fixing, snap-fit ​​connections, and magnetic adsorption. These methods have wide applications, including home lighting, commercial displays, industrial plants, and outdoor lighting. The following section will elaborate on the characteristics and applications of existing light source board positioning structures, using specific technical solutions as examples.

[0031] In traditional mechanical fixing methods, the most common approach is to install the light source board using the mating of positioning posts and positioning holes. For example, some lighting devices have raised positioning posts on the heat sink plate, with corresponding positioning holes on the light source board. During installation, alignment is achieved through the mating of the posts and holes, and further securing is achieved with screws or clips. The advantage of this design is its simple structure and low cost, but it has significant drawbacks. Because the positioning posts are usually integrally formed with the heat sink plate (e.g., through stamping or casting), they are prone to breakage or deformation under frequent disassembly or external impacts. This can lead to the light source board failing to accurately reposition itself, or even necessitating the replacement of the entire heat sink plate, increasing maintenance costs. Furthermore, the post-hole mating requires high machining precision; any dimensional deviations can cause the light source board to tilt or make poor contact, affecting heat dissipation efficiency.

[0032] To improve installation convenience, some technical solutions use flexible snap-fit ​​structures instead of rigid positioning posts. For example, flexible claws are set at the edge of the heat sink plate, and corresponding slots are designed on both sides of the light source board. Quick engagement is achieved through the elastic deformation of the claws. This design reduces the use of screws, simplifies the installation process, and is suitable for scenarios that require frequent replacement of the light source board (such as stage lighting equipment). However, long-term use of flexible snap-fits can lead to material fatigue. As the elasticity of the claws decreases, they may loosen. Especially in high-temperature environments, plastic snap-fits are prone to aging and embrittlement, further reducing reliability. In addition, purely mechanical snap-fits lack adjustment capabilities. If the light source board undergoes slight deformation due to thermal expansion, it may cause engagement failure or localized stress concentration, affecting long-term stability.

[0033] Magnetic adsorption positioning technology is gaining increasing attention in high-end lighting equipment. For example, a permanent magnet is embedded in the back of the light source panel, and a magnetically conductive material (such as an iron sheet) is placed at the corresponding position on the heat sink plate, using magnetic attraction to achieve rapid positioning. The advantage of this approach is that precise alignment is not required during installation; the position automatically adjusts after adsorption, and disassembly only requires overcoming the magnetic force, making operation extremely convenient. However, magnetic adsorption also has significant limitations. First, the magnetic force needs precise control; too weak a force may result in insecure fixation, while too strong a force increases the difficulty of disassembly. Second, magnetic materials may demagnetize in high-temperature environments, and the adsorption force weakens over long-term use. Finally, the presence of a magnetic field may interfere with surrounding electronic components (such as drivers or sensors), limiting its application in precision equipment.

[0034] To address the frequent vibrations and harsh environments inherent in industrial lighting scenarios, some technical solutions employ composite positioning structures. For example, a combination of guide grooves and limiting blocks is designed on the heat sink plate. After the light source plate slides along the guide groove to a predetermined position, it is locked by the limiting block. Such structures typically incorporate elastic elements (such as springs or silicone pads) to buffer vibrations and prevent displacement of the light source plate. Precise machining of the guide groove ensures repeatable installation accuracy, while the mechanical locking of the limiting block provides high impact resistance. However, this design is complex, with a large number of parts, leading to increased manufacturing costs. Furthermore, the sliding contact parts are prone to jamming in dusty or humid environments, requiring regular cleaning and maintenance, further increasing operating costs.

[0035] In the home lighting industry, user demands for aesthetics and ease of installation have driven the development of concealed positioning structures. For example, some ceiling lights employ a rotating locking design, with raised locking points on the edge of the light source panel and corresponding spiral grooves in the heat sink. During installation, rotating the light source panel moves the locking points along the spiral grooves until locked. This design offers a clean appearance, eliminating the need for exposed screws or clips, while providing stable clamping force through a spiral self-locking mechanism. However, its drawback lies in the requirement for precise alignment during installation; improper rotation by ordinary users may lead to poor contact. Furthermore, the machining precision of the spiral grooves directly affects the locking effect; even minor burrs or wear can cause jamming or abnormal noise.

[0036] In recent years, with the rise of intelligent lighting systems, adjustable light source panel positioning structures have become a research hotspot. For example, some solutions integrate electric actuators into the heat sink, using a controller to adjust the actuator's stroke, driving the light source panel to move back and forth to change the illumination angle. Such designs are typically paired with sensors to monitor the light source panel's position in real time, enabling automated adjustment. However, the introduction of electric actuators significantly increases system complexity and power consumption, and mechanical transmission components may wear down after long-term use, affecting positioning accuracy. Furthermore, such solutions are costly and primarily used in high-end commercial lighting, making them difficult to popularize in the home lighting market.

[0037] In terms of material selection, existing technologies generally use aluminum alloy as the main material for heat sink plates due to its excellent thermal conductivity and lightweight characteristics. The substrate for the light source board is often made of ceramic or metal-based composite materials to improve heat dissipation efficiency. Moving parts in the positioning structure (such as clips and sliders) are often made of engineering plastics or stainless steel, balancing strength and corrosion resistance. For example, a patent mentions an elastic slider made of POM (polyoxymethylene), which has a low coefficient of friction and high wear resistance, making it suitable for frequent sliding scenarios. However, the difference in the coefficients of thermal expansion of different materials may cause slight structural deformations when temperatures change, affecting long-term fitting accuracy.

[0038] In summary, while there are various existing light source board positioning technologies, they all have limitations to varying degrees. Mechanical fixing relies on precision machining and is prone to damage; elastic clips face material aging issues; magnetic adsorption is limited by the environment; composite structures are costly; and intelligent adjustment solutions are not yet fully mature. These shortcomings manifest in practical applications as low installation efficiency, high maintenance costs, and poor environmental adaptability, hindering the overall performance improvement of lighting devices. Therefore, there is an urgent need for a light source board positioning solution that combines high precision, strong stability, ease of operation, and controllable cost to meet the needs of diverse lighting scenarios.

[0039] Please see Figure 1-4 As shown, this embodiment provides a lighting device with a light source plate positioning structure, including: a heat sink plate 1, a light source plate 2, and a clamping assembly corresponding to the light source plate 2. The light source plate 2 is located on the lower side of the heat sink plate 1. The heat sink plate 1 is provided with an adjustment groove and a connecting frame 3 is installed on the lower side. The connecting frame 3 is located on the periphery of the light source plate 2. A controller 4 corresponding to the light source plate 2 is provided on the lower side of the adjustment groove. A lampshade 5 is slidably fitted on the lower part of the connecting frame 3. The light source plate 2 is located between the heat sink plate 1 and the lampshade 5.

[0040] The clamping assembly includes a fixed rod 6 installed between the upper and lower sides of the adjustment groove and two sliding plates 9 slidably engaged in the adjustment groove. A rotating plate 7 is rotatably engaged around the fixed rod 6. The rotating plate 7 is located on the side of the controller 4. Both the rotating plate 7 and the controller 4 are located between the two sliding plates 9. Connecting plates 8 are rotatably engaged on both sides of the rotating plate 7. The fixed rod 6 is located between the two connecting plates 8. The end of the connecting plate 8 away from the rotating plate 7 is rotatably engaged on one side of the sliding plate 9. Two sliders 11 are installed on the lower side of the sliding plate 9. The sliders 11 slide elastically on the lower part of the heat sink plate 1. L-shaped support plates 12 are installed on the lower side of the corresponding two sliders 11. The two L-shaped support plates 12 are distributed in a mirror symmetrical manner. The two sides of the light source plate 2 are respectively clamped in one of the L-shaped support plates 12.

[0041] One application of this embodiment is as follows: During installation, one of the L-shaped support plates 12 is first pushed away from the other L-shaped support plate 12, thereby causing the corresponding slider 11 and slide plate 9 to move synchronously. The displacement of slide plate 9 pulls the rotating plate 7 to rotate through the connecting plate 8. The rotation of the rotating plate 7 pushes the connecting plate 8, slide plate 9, slider 11, and L-shaped support plate 12 on the other side to move simultaneously, thereby achieving the mutual separation of the two L-shaped support plates 12. Then, the light source plate 2 is attached to the positioning surface on the lower side of the heat sink plate 1, and the pushing force on the L-shaped support plate 12 is released. At this time, the slider 11 slides in the opposite direction under the elastic force, thereby causing the two L-shaped support plates 12 to move closer to each other, achieving the clamping and limiting of the light source plate 2 between the two L-shaped support plates 12. Finally, the lampshade 5 is slid into the connecting frame 3 to complete the overall assembly. When it is necessary to replace or repair the light source plate 2, the same operation can be used to quickly disassemble the light source plate 2. It should be noted that all electrical equipment involved in this application can be powered by a battery or an external power source.

[0042] By using the rotating plate 7 and the connecting plate 8 together, the sliding plate 9 can be pushed and pulled to move the slider 11 and the L-shaped support plate 12, thereby allowing the two L-shaped support plates 12 to move closer or further apart. This facilitates precise clamping and positioning of both sides of the light source plate 2, improving clamping symmetry and structural stability. At the same time, the elastic sliding of the slider 11 combined with the limiting constraint of the L-shaped support plate 12 improves the convenience and stability of clamping the light source plate 2, and increases the maintenance efficiency of the light source plate 2. This overall optimizes the structural practicality and user experience of the lighting device.

[0043] like Figure 2 , 4 As shown, the connecting frame 3 in this embodiment has a groove on one side, two extension plates 13 are installed, and two pins are provided. The groove horizontally penetrates the hollow area of ​​the connecting frame 3, and the lampshade 5 is slidably fitted in the groove. The groove is located between the upper and lower extension plates 13, and the lower part of the pin vertically penetrates the two extension plates 13. The groove facilitates the positioning and installation of the lampshade 5. At the same time, the cooperation between the extension plates 13 and the pins reduces the probability of the lampshade 5 accidentally falling off.

[0044] like Figure 4 As shown, the heat sink plate 1 in this embodiment has two sliding grooves on its lower side. The sliding grooves are connected to the adjustment grooves. The slider 11 slides elastically in the corresponding sliding groove. A guide rod 16 is installed between the two sides of the sliding groove. The guide rod 16 passes through the two corresponding sliders 11 laterally. The guide rod 16 improves the stability of the slider 11 and the slide plate 9 when they slide.

[0045] like Figure 3As shown, a spring 10 is installed between the slider 11 and the corresponding side of the slide groove in this embodiment. The spring 10 is sleeved around the corresponding guide rod 16. When the push on the L-shaped support plate 12 is canceled, the spring 10 facilitates the rapid reset of the L-shaped support plate 12, the slide plate 9, the connecting plate 8 and the rotating plate 7.

[0046] like Figure 3 As shown, in this embodiment, the fixed rod 6 is equipped with a bearing on its periphery, and the rotating plate 7 is installed on the periphery of the bearing. The bearing reduces the friction between the rotating plate 7 and the fixed rod 6 when the rotating plate 7 rotates.

[0047] like Figure 2 As shown, in this embodiment, a rubber pad 1 is installed on one side of the inner wall of the L-shaped support plate 12, and a rubber pad 2 is installed on the lower side of the inner wall. The two sides of the light source plate 2 respectively abut against the corresponding rubber pad 1. The rubber pad 2 is located on the lower side of the light source plate 2. By the cooperation of the rubber pad 1 and the rubber pad 2, the probability of the L-shaped support plate 12 clamping and damaging the light source plate 2 is reduced.

[0048] like Figure 3 As shown, in this embodiment, two fixing plates 17 are installed on one side of the slide plate 9. The fixing plates 17 are located between the slide plate 9 and the rotating plate 7. A fixing rod is provided between the upper and lower fixing plates 17. One end of the connecting plate 8 is rotatably engaged with the corresponding fixing rod. By cooperating with the fixing plates 17 and the fixing rod, the stability of the rotation of one end of the connecting plate 8 is improved, and the probability of the connecting plate 8 separating from the slide plate 9 is reduced.

[0049] like Figure 3 As shown, in this embodiment, two fixing plates 18 are installed on both sides of the rotating plate 7. A fixing rod 2 is provided between the upper and lower fixing plates 18. The end of the connecting plate 8 away from the slide plate 9 is rotatably engaged with the corresponding fixing rod 2. By cooperating with the fixing plates 18 and the fixing rod 2, the stability of the rotation of the end of the connecting plate 8 away from the slide plate 9 is improved, and the probability of the connecting plate 8 separating from the rotating plate 7 is reduced.

[0050] Example 1: Controller 4 receives AC power via live and neutral wires, which is rectified into pulsed DC and then divided into two parts. One part of the DC power goes to the LED chips and then to power the linear IC. At this point, the IC parameters need to be adjusted for the product to work properly. Simultaneously, the PWM duty cycle of the two input channels can be adjusted to control the magnitude of the two output currents. The two LED chips have different color temperatures, 2700K and 6000K respectively. The other part is a 12V voltage obtained by AC-DC step-down. At this point, a capacitor is needed for freewheeling at the output position. Then, the 12V is converted to 5V by the DC-DC module to power the LED chips. The output voltage at this point needs to be processed by a ceramic capacitor to avoid excessively high voltage spikes that could damage the low-voltage section. Subsequently, the 5V is converted to 3.3V by an LDO. Controller 4 allows for easy component replacement and is an integrated driver.

[0051] '0' code: Consists of a high-level duration TOH and a low-level duration TOL. A typical TOH value is 0.26 μs, with a tolerance of ±0.05 μs, indicating the high-level duration is within this range when transmitting a '0' code; a typical TOL value is 0.595 μs, with a tolerance of ±0.05 μs, representing the low-level duration. This combination of high and low level times constitutes the characteristic signal of the '0' code.

[0052] '1' code: has a high-level time T1H and a low-level time T1L. The typical value of T1H is 0.595μs, with a tolerance of ±0.05μs; the typical value of T1L is 0.26μs, with a tolerance of ±0.05μs. The high and low level times are opposite to those of the '0' code, and it is used to distinguish it from the '0' code.

[0053] RESET code: Only one low-level time parameter Trst, which must be greater than 80μs. Used to reset the chip and force the chip to enter the initial state.

[0054] Relationship between data transmission and code value:

[0055] Data transmission begins with a RESET code, marking the start of a data refresh cycle. The RESET code remains low for at least 80 μs to ensure the chip reliably resets and prepares to receive new data.

[0056] Data is transmitted in four stages, D1-D4. D1 is sent by the MCU, while D2-D4 are automatically shaped and forwarded by the cascaded circuit. Data is encoded and transmitted using a combination of 0 and 1 codes, arranged in a 24-bit data structure from B7 to B0. Different bit combinations represent different information, ensuring accurate data transmission.

[0057] In this embodiment, the luminous intensity is controlled by controlling the current flowing through the two LEDs, and the corresponding color temperature level is achieved by controlling the ratio of the luminous intensity of the two LEDs. Function selection is achieved through convenient module replacement. The product can be used completely by inputting the AC live and neutral wires, avoiding the disadvantages of multi-wire soldering during assembly. The controller 4 can be used completely by inputting the AC live and neutral wires, avoiding the disadvantages of multi-wire soldering during assembly. By changing components, it is easy to use various APPs and multiple control methods, including 2.4G+WIFI dual-mode / 2.4G remote control / infrared remote control, and it can also be connected to third-party home systems.

[0058] Example 2: Multiple LED beads are installed on the lower side of the light source board 2. The LED beads are a combination of white LED beads, warm LED beads and colorful LED beads. The control circuit can independently adjust the brightness and working status of each type of LED bead.

[0059] In this embodiment, white LED beads are used for everyday lighting, providing bright and clear light; warm LED beads are used to create a warm and comfortable atmosphere; and color-changing LED beads are used to produce rich colored light. By mixing red, green, and blue light in different proportions, various color changes can be achieved.

[0060] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. A lighting device with a light source plate positioning structure, characterized in that, include: The heat sink plate (1), the light source plate (2) and the clamping assembly corresponding to the light source plate (2) are provided. The heat sink plate (1) is provided with an adjustment groove and a connecting frame (3) is installed on the lower side. A controller (4) corresponding to the light source plate (2) is provided on the lower side of the adjustment groove. A lamp cover (5) is slidably fitted on the lower part of the connecting frame (3). The clamping assembly includes a fixed rod (6) installed between the upper and lower sides of the adjustment groove and two sliding plates (9) slidably fitted in the adjustment groove. The fixed rod (6) is rotatably fitted with a rotating plate (7). Both sides of the rotating plate (7) are rotatably fitted with connecting plates (8). The end of the connecting plate (8) away from the rotating plate (7) is rotatably fitted with one side of the sliding plate (9). Two sliders (11) are installed on the lower side of the sliding plate (9). The sliders (11) slide elastically on the lower part of the heat sink plate (1). The lower side of the two corresponding sliders (11) is fitted with L-shaped support plates (12). The two sides of the light source plate (2) are respectively clamped in one of the L-shaped support plates (12).

2. The lighting device with a light source plate positioning structure according to claim 1, characterized in that, The connecting frame (3) has a groove on one side, two extension plates (13) are installed and two pins are provided. The lampshade (5) slides in the groove and the lower part of the pins vertically penetrates the two extension plates (13).

3. The lighting device with a light source plate positioning structure according to claim 1, characterized in that, The heat sink plate (1) has two grooves on its lower side. The slider (11) slides elastically in the corresponding groove. A guide rod (16) is installed between the two sides of the groove. The guide rod (16) passes through the two corresponding sliders (11) laterally.

4. A lighting device with a light source plate positioning structure according to claim 3, characterized in that, A spring (10) is installed between the slider (11) and the corresponding side of the slide groove, and the spring (10) is sleeved around the corresponding guide rod (16).

5. A lighting device with a light source plate positioning structure according to claim 1, characterized in that, The fixed rod (6) is equipped with bearings on its periphery, and the rotating plate (7) is installed on the periphery of the bearings.

6. A lighting device with a light source plate positioning structure according to claim 1, characterized in that, The inner wall of the L-shaped support plate (12) is equipped with a rubber pad 1 on one side and a rubber pad 2 on the lower side of the inner wall.

7. A lighting device with a light source plate positioning structure according to claim 1, characterized in that, Two fixing plates (17) are installed on one side of the skateboard (9), and a fixing rod is provided between the upper and lower fixing plates (17). One end of the connecting plate (8) is rotatably fitted on the corresponding fixing rod.

8. A lighting device with a light source plate positioning structure according to claim 7, characterized in that, Two fixing plates (18) are installed on both sides of the rotating plate (7). A fixing rod is provided between the upper and lower fixing plates (18). The end of the connecting plate (8) away from the sliding plate (9) is rotated and fitted around the corresponding fixing rod.

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