An IP64 waterproof lighting module
Through the innovative design of waterproof tracks and lighting components, assembly and disassembly without external tools are achieved, solving the problem of inconvenient operation of existing waterproof lighting devices and improving convenience and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONGSHAN XUSHENG LIGHTING TECHNOLOGY CO LTD
- Filing Date
- 2025-08-22
- Publication Date
- 2026-06-19
Smart Images

Figure CN224381474U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lighting device technology, and in particular to an IP64 waterproof lighting module. Background Technology
[0002] Currently, lighting devices are used in a variety of scenarios. They can serve as daily necessities to meet users' basic lighting needs, or as decorative items to create different lighting effects or atmospheres through design and control.
[0003] Related technology can be found in Chinese Patent No. CN222811733U, which discloses a waterproof lighting device. The device has two supports, each with a rotating shaft at its upper end. A lower housing is located between the two shafts, and an upper housing is fixed to the upper side of the lower housing via hexagonal bolts. A glass cover is provided on the upper surface of the upper housing, and a lamp panel is located on the upper inner side of the upper housing. Multiple evenly distributed LED beads are arranged on the upper surface of the lamp panel. A sealing module for waterproof sealing is also provided between the lower and upper housings. An adjustment module for adjusting the lighting angle is also provided between the shafts and the supports. This waterproof lighting device allows for quick adjustment of the lighting angle according to illumination needs while achieving efficient waterproofing, and can adapt to different moisture environments for lighting purposes.
[0004] Regarding the aforementioned technologies, both the mounting circuit board and the lamp board are connected to the housing by bolts. Users need to use external tools to assemble or disassemble the device during installation. This is inconvenient when replacing or disassembling the device in daily operations, and it does not improve the convenience of installation and use of the device. Utility Model Content
[0005] To improve the ease of installation and use of the device, this application provides an IP64 waterproof lighting module.
[0006] This application provides an IP64 waterproof lighting module, which adopts the following technical solution:
[0007] An IP64 waterproof lighting module includes a waterproof track and a lighting component. The waterproof track has an installation groove along its length, and snap-fit grooves are formed on the inner walls of both sides of the installation groove along its length. An insulated wire is laid at the bottom of the installation groove along its length, and a conductive metal wire is placed inside the insulated wire. The lighting component includes a lighting device and a mounting box. A guide pin corresponding to the conductive metal wire is fixed inside the mounting box. When the guide pin contacts the conductive metal wire, it transmits current to the lighting device. A fixing box is provided on the side of the mounting box away from the lighting device. The fixing box is located in the installation groove and is in contact with the surface of the insulated wire. The fixing box is sleeved on the outside of the mounting box and is slidably connected to the mounting box along the length of the guide pin. A reset member is provided inside the fixing box and the mounting box. In its natural state, the reset member pushes the mounting box away from the fixing box. Snap-fit blocks adapted to the snap-fit grooves are fixed at both ends of the mounting box along its width. The snap-fit blocks are made of elastic material.
[0008] By adopting the above technical solution, the waterproof track supports the lighting components and insulated wires through the mounting groove. The reset component connects the fixing box and the mounting box. The mounting box is pressed towards the insulated wire, and the mounting box slides along the inner walls of both sides of the fixing box. The fixing box supports and guides the mounting box. The snap-fit block is inserted into the snap-fit groove and fits against the inner wall of the snap-fit groove. The snap-fit groove and the reset component cooperate to fix the snap-fit block, thereby fixing the mounting box. At this time, the guide pin penetrates the insulated wire and contacts the conductive metal wire, and remains fixed. The conductive metal wire stably transmits current to the lighting equipment through the guide pin to enable the lighting equipment to work continuously, which helps to improve the convenience of device installation.
[0009] Optionally, the reset component includes an elastic element and a limiting post. The limiting post is fixedly disposed at the bottom of the fixing box. The elastic element is disposed on the outside of the limiting post and fixedly connected to the limiting post. The side of the elastic element away from the limiting post is fixedly connected to the inner wall of the mounting box. A limiting plate is fixedly disposed inside the mounting box. The limiting plate is parallel to the length direction of the elastic element. When the limiting plate contacts the fixing box, the elastic element reaches its maximum deformation state.
[0010] By adopting the above technical solution, the limiting post supports the elastic element one, and the limiting plate restricts the compression degree of the elastic element one, which helps to extend the service life of the elastic element one. The elastic element one is used to connect the fixing box and the mounting box. Under the elastic action of the elastic element one, the mounting box moves closer to or further away from the fixing box along the length direction of the guide pin, so as to realize the insertion of the snap-fit block into the snap-fit groove or the detachment from the snap-fit groove, thereby completing the assembly and disassembly of the lighting component and the waterproof track, and then making the guide pin contact or separate from the conductive metal wire to control the operation of the lighting equipment, which helps to improve the installation and use convenience of the device.
[0011] Optionally, the mounting box has pressing blocks at both ends along its length. The pressing blocks are slidably connected to the mounting box along its length. A straight plate is fixed on the side of the pressing blocks that are close to each other. Protrusions corresponding to the snap-fit blocks are fixed on both sides of the straight plate. The mounting box has a through hole. The snap-fit blocks are located in the through hole and are directly opposite the corresponding protrusions. An elastic element two is fixed on the side of the straight plate away from the pressing blocks. The side of the elastic element two away from the straight plate is fixedly connected to the limiting plate. In its natural state, the elastic element two pushes the pressing blocks away from the limiting plate. At this time, the protrusions and the snap-fit blocks are in contact with the side of the snap-fit blocks away from the snap-fit groove.
[0012] By adopting the above technical solution, in the natural state of the elastic element two, the protrusion is located in the through hole and pushes the snap-fit block into the snap-fit groove. The elastic element two and the snap-fit groove cooperate to further fix the snap-fit block, thereby fixing the mounting box. Press the pressing block towards the middle of the mounting box, and the straight plate moves closer to the limiting plate and cooperates with the limiting plate to compress the elastic element two. The elastic element two provides movement space for the straight plate. At this time, the protrusion disengages from the through hole, so that the snap-fit block can be reset into the through hole, which facilitates the disengagement of the mounting box and the fixing box from the mounting groove, and helps to improve the convenience of device installation and disassembly.
[0013] Optionally, the insulated wire has multiple positioning grooves along its length on the side near the fixing box, and the fixing box has multiple positioning blocks that are adapted to the positioning grooves along its length on the side near the insulated wire. The positioning blocks are inserted into the positioning grooves and fit against the inner wall of the positioning grooves.
[0014] By adopting the above technical solution, the positioning groove limits and fixes the fixed box through the positioning block, thereby limiting and fixing the fixed box with the waterproof track. The positioning groove and positioning block increase the contact area between the insulated wire and the fixing strip, and strengthen the connection between the fixed box and the insulated wire by increasing the friction. At the same time, it extends the water vapor penetration path, improves the waterproof effect between the insulated wire and the fixed box, and helps to improve the safety of use and the stability of assembly of the device.
[0015] Optionally, a plurality of guide rings are fixed inside the fixing box, the guide rings protruding from the inner surface of the fixing box, and the guide pin is always inside the guide ring.
[0016] By adopting the above technical solution, the guide ring guides and limits the guide pin, reducing the probability that the guide pin will deviate and affect the current transmission when the mounting box is pressed, which helps to improve the accuracy of the guide pin passing through the fixing box.
[0017] Optionally, the fixing box has several water inlets on the side near the insulated wire.
[0018] By adopting the above technical solution, the liquefied water vapor inside the fixed box flows out through the water guide, reducing the probability of water vapor affecting the operation of the device.
[0019] Optionally, the fixing box has an inner box in the middle that communicates with the fixing box. The inner box is connected to the mounting box and moves synchronously with the mounting box. In the natural state of the reset component, the inner box and the fixing box are staggered.
[0020] By adopting the above technical solution, the mounting box guides and supports the inner box, and the liquefied water vapor in the fixing box can flow out from both ends of the inner box or the end of the fixing box near the inner box, reducing the probability of water vapor affecting the operation of the device.
[0021] Optionally, the inner box has limit grooves on both sides along the width direction, and the lighting equipment is provided with a limit strip that matches the limit groove. The limit strip is inserted into the limit groove and fits against the inner wall of the limit groove.
[0022] By adopting the above technical solution, the limiting strip and the limiting groove work together to fix the lighting equipment to the inner box, which helps to improve the stability of the device's operation.
[0023] In summary, this application includes at least one of the following beneficial technical effects:
[0024] 1. The waterproof track supports the lighting components and insulated wires through the mounting groove. The reset piece connects the fixing box and the mounting box. Pressing the mounting box towards the insulated wire causes it to slide along the inner walls of both sides of the fixing box. The fixing box supports and guides the mounting box. The snap-fit block is inserted into the snap-fit groove and fits against the inner wall of the snap-fit groove. The snap-fit groove and the reset piece work together to fix the snap-fit block, thereby fixing the mounting box. At this time, the guide pin penetrates the insulated wire and contacts the conductive metal wire, and remains fixed. The conductive metal wire stably transmits current to the lighting equipment through the guide pin to ensure continuous operation of the lighting equipment, which helps to improve the convenience of device installation.
[0025] 2. The limiting post supports the elastic element one, and the limiting plate limits the compression degree of the elastic element one, which helps to extend the service life of the elastic element one. The elastic element one is used to connect the fixing box and the mounting box. Under the elastic action of the elastic element one, the mounting box moves closer to or further away from the fixing box along the length of the guide pin, so as to realize the insertion of the snap-fit block into the snap-fit groove or the detachment from the snap-fit groove, thereby completing the assembly and disassembly of the lighting components and the waterproof track, and then making the guide pin contact or separate from the conductive metal wire to control the operation of the lighting equipment, which helps to improve the installation and use convenience of the device.
[0026] 3. In the natural state of the second elastic element, the protrusion is located in the through hole and pushes the snap-fit block into the snap-fit groove. The second elastic element and the snap-fit groove cooperate to further fix the snap-fit block, thereby fixing the mounting box. Press the pressing block towards the center of the mounting box, and the straight plate moves closer to the limiting plate and cooperates with the limiting plate to compress the second elastic element. The second elastic element provides movement space for the straight plate. At this time, the protrusion disengages from the through hole, so that the snap-fit block can be reset into the through hole, which facilitates the disengagement of the mounting box and the fixing box from the mounting groove, and helps to improve the convenience of device installation and disassembly. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the overall structure of Example 1.
[0028] Figure 2 This is a cross-sectional view of the mounting box and the fixing box.
[0029] Figure 3 This is a schematic diagram designed to highlight the positions of the straight plate and the elastic component.
[0030] Figure 4 This is a schematic diagram of the overall structure of Example 2.
[0031] Figure 5 This is a cross-sectional view of the inner box.
[0032] Explanation of reference numerals in the attached drawings: 1. Waterproof track; 11. Mounting groove; 12. Insulated wire; 121. Positioning groove; 13. Snap-fit groove; 2. Lighting assembly; 21. Mounting box; 211. Guide pin; 212. Snap-fit block; 213. Reset component; 2131. Elastic component one; 2132. Limiting post; 214. Limiting plate; 215. Through hole; 22. Lighting equipment; 221. Limiting strip; 23. Pressing block; 231. Straight plate; 232. Protrusion; 233. Elastic component two; 24. Fixing box; 241. Positioning block; 242. Guide ring; 243. Water inlet; 244. Inner box; 2441. Limiting groove; 245. Support box. Detailed Implementation
[0033] The present application will be further described in detail below with reference to all the accompanying drawings.
[0034] This application discloses an IP64 waterproof lighting module.
[0035] Example 1
[0036] Reference Figure 1An IP64 waterproof lighting module includes a waterproof track 1 and a lighting component 2. The waterproof track 1 has a mounting groove 11 along its length. The lighting component 2 is located in the mounting groove 11. The waterproof track 1 supports the lighting component 2 through the mounting groove 11. An insulated wire 12 is arranged along its length inside the waterproof track 1. A water-conducting gap is left between the insulated wire 12 and the inner wall of the mounting groove 11. Several conductive metal wires for transmitting current are provided inside the insulated wire 12. The conductive metal wires are evenly arranged along the width direction of the insulated wire 12.
[0037] Reference Figure 1 and Figure 2 The lighting assembly 2 includes a mounting box 21 and a lighting device 22. The mounting box 21 is located in the mounting groove 11 and is arranged parallel to the mounting groove 11. The lighting device 22 is fixedly installed on the side of the mounting box 21 away from the insulated wire 12. A guide pin 211 communicating with the lighting device 22 is fixedly provided inside the mounting box 21. The guide pin 211 is arranged perpendicular to the mounting box 21.
[0038] Reference Figure 1 The inner walls on both sides of the mounting groove 11 are provided with snap-fit grooves 13 along the length direction. The mounting box 21 is provided with snap-fit blocks 212 that are adapted to the snap-fit grooves 13 at both ends along the width direction. The snap-fit blocks 212 are made of elastic material, such as silicone. The mounting box 21 is provided with through holes 215 at both ends along the width direction for accommodating the snap-fit blocks 212. In the natural state, the snap-fit blocks 212 are located in the through holes 215 and protrude from the surfaces of the mounting box 21 and the fixing box 24.
[0039] Reference Figure 1 and Figure 2 The mounting box 21 is slidably connected to the fixing box 24 along the length direction of the guide pin 211. The fixing box 24 is sleeved on the outside of the mounting box 21. The surface of the insulated wire 12 has a number of positioning grooves 121 along the length direction. The positioning grooves 121 are wavy. The recess of the positioning grooves 121 is directly opposite to the conductive metal wire. The fixing box 24 is fixed with a positioning block 241 that matches the positioning grooves 121 on the side away from the mounting box 21.
[0040] Reference Figure 1 and Figure 2 The fixing box 24 and the mounting box 21 are placed in the mounting groove 11. The positioning block 241 is inserted into the positioning groove 121 and fits against the inner wall of the positioning groove 121. The positioning groove 121 fixes the fixing box 24 through the positioning block 241, thereby fixing the waterproof track 1 to the fixing box 24, which helps to improve the structural stability of the device. At the same time, the positioning groove 121 and the positioning block 241 increase the contact area between the fixing box 24 and the insulated wire 12, extending the water vapor penetration path, which helps to improve the sealing effect of the device and improve the safety of the device in use.
[0041] Reference Figure 2 and Figure 3 A reset component 213 is provided between the fixing box 24 and the mounting box 21. The reset component 213 includes an elastic element 2131 and a limiting post 2132. The limiting post 2132 is fixedly installed on the inner surface of the fixing box 24 and parallel to the guide pin 211. The elastic element 2131 can be a spring, which is sleeved on the outside of the limiting post 2132 and fixedly connected to the limiting post 2132. The end of the spring away from the limiting post 2132 is fixedly connected to the mounting box 21. In its natural state, the spring has a tendency to push the mounting box 21 away from the fixing box 24. A limiting plate 214 parallel to the limiting post 2132 is fixedly installed inside the mounting box 21. The limiting plate 214 contacts the spring and guides and limits the spring, reducing the probability of the spring deviating.
[0042] Reference Figure 1 and Figure 2 Press the mounting box 21 towards the direction of the insulated wire 12. The mounting box 21 pushes the elastic element 2131 to compress along the limiting plate 214 towards the limiting post 2132. The elastic element 2131 provides the mounting box 21 with movement space, so that the mounting box 21 moves closer to the fixing box 24. When the snap block 212 is aligned with the snap groove 13, the snap block 212 is inserted into the snap groove 13. At the same time, the mounting box 21 pushes the guide pin 211 through the fixing box 24 and inserts it into the insulated wire 12 and contacts the conductive metal wire. The conductive metal wire supplies power to the lighting device 22 through the guide pin 211 so that the lighting device 22 can light up.
[0043] Reference Figure 2 and Figure 3 The mounting box 21 has pressing blocks 23 slidably connected to both sides along its length. A straight plate 231 is fixedly connected to one end of the pressing blocks 23 that is close to each other. The straight plate 231 is parallel to the mounting box 21. An elastic element 233 is provided on one side of the straight plate 231 that is close to each other. The elastic element 233 can be a spring. One end of the spring is fixedly connected to the straight plate 231, and the other end is fixedly connected to the limiting plate 214. Protrusions 232 are installed on both sides of the straight plate 231 along its width. In its natural state, the spring pushes the straight plate 231 away from the limiting plate 214, causing the protrusions 232 to be located within the through hole 215 and preventing the locking block 212 from resetting, further strengthening the locking block 212 and the locking groove 13 (see reference). Figure 1 The connection of the card block 212 is reduced from the card slot 13 (see reference). Figure 1 The probability of detachment from the device is reduced, which helps to improve the installation stability of the device.
[0044] Reference Figure 1 and Figure 3 With the snap-fit block 212 and snap-fit slot 13 installed, press the pressing block 23 to bring the two pressing blocks 23 closer to each other, and the straight plate 231 moves closer to the limiting plate 214 (see reference). Figure 2The elastic element 233 is compressed in the direction of the pressure, causing it to contract and providing space for the straight plate 231 to move. At this time, the straight plate 231 drives the protrusion 232 to gradually disengage from the through hole 215, causing the locking block 212 to reset. Pulling the mounting box 21 away from the waterproof track 1 causes the locking block 212 to disengage from the locking groove 13, and the guide pin 211 to disengage from the insulated wire 12, thus completing the disassembly of the device and improving the convenience of device disassembly.
[0045] refer to Figure 1 and Figure 2 The inner surface of the fixing box 24 is provided with a guide ring 242 corresponding to the guide pin 211. The guide ring 242 protrudes from the inner surface of the fixing box 24 and accommodates the end of the guide pin 211 away from the mounting box 21. This reduces the probability that the guide pin 211 will deviate when the mounting box 21 is pressed, thus preventing it from being inserted into the insulated wire 12. This helps to improve the accuracy of inserting the guide pin 211 into the insulated wire 12.
[0046] The fixed box 24 has several water inlets 243 on the side near the insulated wire 12. In the installed state, the water inlets 243 are directly opposite the water inlet gap. The liquefied water vapor flows through the water inlet 243 to the water inlet gap and is finally discharged through the water inlet gap, which reduces the probability of water vapor affecting the operation of the device and helps to improve the safety of the device operation.
[0047] The implementation principle of an IP64 waterproof lighting module according to an embodiment of this application is as follows: The fixing box 24 and the mounting box 21 are installed in the mounting groove 11, with the fixing box 24 in close contact with the surface of the insulated wire 12. The mounting box 21 is pressed towards the fixing box 24, and the snap-fit block 212 is inserted into the snap-fit groove 13. Simultaneously, the protrusion 232 prevents the snap-fit block 212 from resetting. The snap-fit groove 13 limits and fixes the snap-fit block 212, thereby limiting and fixing the mounting box 21. This allows the waterproof track 1 to support the mounting box 21 and the fixing box. 24. Fix the waterproof track 1 to the lighting equipment 22 to achieve assembly of the device. Press the pressing block 23 to disengage the protrusion 232 from the through hole 215 and reset the snap block 212. Pull the mounting box 21 away from the waterproof track 1 to disengage the snap block 212 from the snap groove 13 to achieve disassembly of the device. The assembly and disassembly of the device can be completed by its own structure alone without the need for external tools, which helps to improve the convenience of assembly and disassembly of the device.
[0048] Example 2
[0049] The difference between this embodiment and embodiment 1 is that the fixing box 24 in this embodiment includes support boxes 245 at both ends and an inner box 244 in the middle.
[0050] refer to Figure 4The inner box 244 is flush with the mounting box 21 on the side closest to the lighting equipment 22, and there is a gap between the side of the inner box 244 away from the lighting equipment 22 and the insulated wire 12, so that the support box 245 and the inner box 244 are not completely aligned. The liquefied water vapor in the support box 245 can flow out from both ends of the support box 245, which improves the efficiency of water vapor discharge and reduces the probability of water vapor affecting the operation of the device.
[0051] refer to Figure 4 and Figure 5 The inner box 244 has limit grooves 2441 on both sides along the width direction. The lighting device 22 is provided with limit strips 221 that are adapted to the limit grooves 2441. In the installed state, the limit strips 221 are inserted into the limit grooves 2441 and fit against the inner wall of the limit grooves 2441. The two ends of the lighting device 22 along the length direction are fixedly connected to the mounting box 21. The limit strips 221 cooperate with the limit grooves 2441 to fix the inner box 244, which helps to improve the stability of the device operation.
[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. An IP64 waterproof lighting module, comprising a waterproof track (1) and a lighting assembly (2), characterized in that: The waterproof track (1) has an installation groove (11) along its length, and the inner walls on both sides of the installation groove (11) have snap-fit grooves (13) along the length. An insulated wire (12) is laid at the bottom of the installation groove (11) along the length, and a conductive metal wire is placed inside the insulated wire (12). The lighting assembly (2) includes a lighting device (22) and a mounting box (21). A guide pin (211) corresponding to the conductive metal wire is fixed inside the mounting box (21). When the guide pin (211) contacts the conductive metal wire, it transmits current to the lighting device (22). The mounting box (21) is away from the lighting device (22). A fixing box (24) is provided on one side. The fixing box (24) is located in the mounting groove (11) and is in contact with the surface of the insulated wire (12). The fixing box (24) is sleeved on the outside of the mounting box (21) and is slidably connected to the mounting box (21) along the length direction of the guide pin (211). A reset member (213) is provided in the fixing box (24) and the mounting box (21). The reset member (213) pushes the mounting box (21) away from the fixing box (24) in its natural state. The mounting box (21) has a snap-fit block (212) that is adapted to the snap-fit groove (13) at both ends along the width direction. The snap-fit block (212) is made of elastic material.
2. The IP64 waterproof lighting module according to claim 1, characterized in that: The reset component (213) includes an elastic element (2131) and a limiting post (2132). The limiting post (2132) is fixed to the bottom of the fixing box (24). The elastic element (2131) is sleeved on the outside of the limiting post (2132) and fixedly connected to the limiting post (2132). The side of the elastic element (2131) away from the limiting post (2132) is fixedly connected to the inner wall of the mounting box (21). A limiting plate (214) is fixedly provided inside the mounting box (21). The limiting plate (214) is parallel to the length direction of the elastic element (2131). When the limiting plate (214) contacts the fixing box (24), the elastic element (2131) reaches the maximum deformation state.
3. The IP64 waterproof lighting module according to claim 2, characterized in that: The mounting box (21) has pressing blocks (23) at both ends along its length. The pressing blocks (23) are slidably connected to the mounting box (21) along its length. A straight plate (231) is fixed on one side of the pressing blocks (23) that are close to each other. Protrusions (232) corresponding to the snap-fit blocks (212) are fixed on both sides of the straight plate (231). A through hole (215) is opened in the mounting box (211). The snap-fit blocks (212) are located in the through hole (215). 15) Inside and facing the corresponding protrusion (232), the straight plate (231) is fixedly provided with an elastic element two (233) on the side away from the pressing block (23). The side of the elastic element two (233) away from the straight plate (231) is fixedly connected to the limiting plate (214). In its natural state, the elastic element two (233) pushes the pressing block (23) away from the limiting plate (214). At this time, the protrusion (232) and the snap-fit block (212) are attached to the side away from the snap-fit groove (13).
4. The IP64 waterproof lighting module according to claim 1, characterized in that: The insulated wire (12) has multiple positioning grooves (121) along its length on the side near the fixing box (24). The fixing box (24) has multiple positioning blocks (241) that are adapted to the positioning grooves (121) along its length on the side near the insulated wire (12). The positioning blocks (241) are inserted into the positioning grooves (121) and fit against the inner wall of the positioning grooves (121).
5. The IP64 waterproof lighting module according to claim 1, characterized in that: Multiple guide rings (242) are fixed inside the fixed box (24). The guide rings (242) protrude from the inner surface of the fixed box (24), and the guide pin (211) is always inside the guide rings (242).
6. The IP64 waterproof lighting module according to claim 1, characterized in that: The fixing box (24) has several water inlets (243) on the side near the insulated wire (12).
7. The IP64 waterproof lighting module according to claim 1, characterized in that: The fixing box (24) has an inner box (244) in the middle that communicates with the fixing box (24). The inner box (244) is connected to the mounting box (21) and moves synchronously with the mounting box (21). In the natural state of the reset member (213), the inner box (244) and the fixing box (24) are staggered.
8. The IP64 waterproof lighting module according to claim 7, characterized in that: The inner box (244) has limit grooves (2441) on both sides along the width direction. The lighting device (22) is provided with a limit strip (221) that is adapted to the limit groove (2441). The limit strip (221) is inserted into the limit groove (2441) and fits against the inner wall of the limit groove (2441).