Lamp adapting to T-shaped ceiling keel

Abstract

The lamp adapting to the T-shaped ceiling keel comprises a keel assembly, a mounting assembly and a locking assembly, the keel assembly is composed of a light steel keel, a gypsum board assembly is arranged on the inner side of the light steel keel, the mounting assembly is composed of a connecting plate, the bottom of the connecting plate is fixedly connected with a lamp body assembly, and the locking assembly is composed of an abutting plate. And the limiting assembly is composed of a limiting plate, and the limiting plate makes contact with the top face of the lamp body assembly. Convenient installation is achieved through cooperation of the installation assembly and the lamp assembly, the position of the installation assembly can be adjusted according to the length of the lamp body, fixing after installation is conducted through the locking assembly, further limiting after installation is achieved through cooperation of the limiting assembly and the installation assembly, and meanwhile the lamp body can be conveniently and rapidly installed before installation; when the locking assembly is fixed, synchronous fixing of the limiting assembly is achieved, site construction is facilitated, construction steps can be simplified, and the using convenience of the lamp on the ceiling keel is improved.

Description

Technical Field

[0001] This invention relates to a lighting fixture adapted to T-shaped ceiling joists, belonging to the field of lighting technology. Background Technology

[0002] Ceiling keel, also known as suspended ceiling keel, is what we often see in ceilings, especially decorative ceilings. It's constructed using a keel as a framework, then covered with plasterboard. The keel refers to the main material used for suspended ceilings, made of light steel. The ceiling keel connects to the hangers and provides installation nodes for the surface panels, acting as a crucial structural component in the suspended ceiling. Ordinary non-accessible ceilings typically use wooden keels, structural steel or light steel keels, or aluminum alloy keels. Accessible ceilings, due to their higher load-bearing requirements, use structural steel or large-section wooden keels, with walkways built on top. The ceiling keel system is equipped with a dedicated suspension system. The light steel keel used for suspended ceilings includes load-bearing keels, surface keels, hangers, fasteners, mounting hardware, load-bearing keel connectors, surface keel connectors, and suspension rods. The main and secondary keels are made of light steel. Aluminum panels use a detachable, portal-style keel system, allowing for easy disassembly and reassembly of each panel.

[0003] The installation method for ceiling lights needs to be selected based on the type of ceiling joists, the weight of the lights, and the installation method. Currently, most ceiling lights are linear lights. During on-site construction, these linear lights need to be fixed to the ceiling joists. Due to the varying lengths of the lights, it's difficult to quickly adjust the fixing according to their length, affecting construction efficiency. Furthermore, the locking force is often weak, easily leading to the separation of the light holders later, affecting the overall appearance. Conversely, excessive locking force increases installation difficulty, especially for ceiling lights that are not frequently replaced, causing inconvenience and increasing the difficulty of installing lights on the ceiling joists. Summary of the Invention

[0004] In order to solve the above-mentioned technical problems, the present invention provides a light fixture adapted to T-shaped ceiling joists.

[0005] The present invention solves the above-mentioned technical problems through the following technical solutions: This invention provides a light fixture adapted to a T-shaped ceiling joist, the light fixture comprising: The keel assembly is composed of light steel keel, which has a T-shaped structure and an overlapping plate at the bottom. A gypsum board assembly is provided on the surface of the overlapping plate located on the inner side of the light steel keel. The mounting assembly is disposed between the light steel keel and the gypsum board assembly. The mounting assembly consists of a connecting plate, the bottom of which extends to the bottom of the light steel keel and the gypsum board assembly, and the bottom of the connecting plate is fixedly connected to the lamp body assembly located below the light steel keel. A locking assembly, comprising a retaining plate disposed on one side of the mounting assembly, wherein the retaining plate is internally threaded with bolts that penetrate the mounting assembly and the limiting assembly respectively, and the limiting assembly is composed of a limiting plate disposed inside the connecting plate and penetrating the overlapping plate and contacting the top surface of the lamp body assembly.

[0006] In this technical solution, the light steel keel is fixedly installed to the roof by multiple hangers. The light steel keel consists of a main keel, a secondary keel and a side keel. The side keel is installed on the wall by nails. Light fixtures are installed below the main keel and the secondary keel, and the gypsum board assembly is embedded between the main keel and the secondary keel.

[0007] In this technical solution, the bottom end of the light steel keel is provided with two overlapping plates. The overlapping plate located on the inner side of the light steel keel has an elongated opening, and the limiting plate is slidably connected to the inside of the opening. The top end of the light steel keel is provided with an end head, and the light steel keel located below the end head forms an overlapping platform, and the overlapping platform is in contact with the locking assembly.

[0008] In this technical solution, the gypsum board assembly consists of multiple gypsum ceiling panels, which are embedded between the main keel and the secondary keel. The edges of the gypsum ceiling panels are attached to the surface of the overlapping board. The edges of the gypsum ceiling panels are provided with grooves, and connecting plates are provided inside the grooves to allow the connecting plates to move inside the grooves.

[0009] In this technical solution, the top of the connecting plate has an elongated hole, the bolt passes through the connecting plate, the end of the bolt contacts the side wall of the limiting plate, and the bolt is located inside the elongated hole. The bottom of the connecting plate has a bent structure, and a horizontally distributed support platform is formed at the bottom of the connecting plate. The edge of the plaster ceiling is attached to the surface of the support platform.

[0010] In this technical solution, the bottom end of the connecting plate is provided with a horizontally distributed outer extension plate and an inner extension plate. The outer extension plate and the inner extension plate are respectively arranged on both sides of the connecting plate, and both the outer extension plate and the inner extension plate are fitted and inserted into the lamp body assembly. A square hole is opened in the middle of the connecting plate, and the limiting plate is inserted through the inside of the square hole. The square hole is arranged on one side of the support platform. A magnet is fixedly connected to the side wall of the connecting plate, and the magnet is distributed correspondingly to the limiting plate.

[0011] In this technical solution, the lamp body assembly is composed of a lamp holder. The lamp holder has an outer platform and an inner platform at both ends. There are concave areas between the two ends of the lamp holder, the outer platform, and the inner platform. The outer extension plate and the inner extension plate at the bottom of the connecting plate are fitted and connected to the concave areas. The edge of the lamp holder is fitted and installed with the lamp cover. The lamp holder located inside the lamp cover is equipped with lamp beads. There are multiple lamp holders. Each lamp holder is connected to a splitter through a connecting line. The splitter is connected to a transformer through a bus.

[0012] In this technical solution, the lamp holder is set below the light steel keel and the plaster ceiling. A gasket is fixedly connected to the inner platform surface on one side of the lamp holder. The gasket is in close contact with the plaster ceiling. The outer platform on the other side of the lamp holder is correspondingly set below the limiting plate.

[0013] In this technical solution, the abutment plate has an L-shaped structure and is set on one side of the light steel keel. The bottom end of the abutment plate is provided with a flange, which fits against the overlapping platform on one side of the light steel keel.

[0014] In this technical solution, the limiting plate has a bent structure, and the side wall of the limiting plate has a protrusion. The protrusion is embedded in the groove opened in the side wall of the connecting plate, and the top of the limiting plate and the connecting plate have an inclination angle so that the limiting plate can rotate around the protrusion. The bottom end of the limiting plate passes through the square hole and the opening respectively. The bottom end of the limiting plate below the opening is provided with a raised edge, and the raised edge contacts the surface of the outer platform. A gap is formed between the outer platform and the overlapping plate for the installation of the lamp body assembly.

[0015] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0016] The positive and progressive effects of this invention are as follows: The aforementioned light fixture adapted to T-shaped ceiling joists adopts a split-structure design, utilizing the cooperation of installation components and light fixture components for convenient installation. The position of the installation components can be adjusted according to the length of the light fixture, ensuring proper installation without being restricted by circumstances. A locking component secures the fixture after installation, improving stability. The sliding locking component allows for on-site cutting to adjust the length of the installation component, providing greater operability and preventing increased installation difficulty due to limited installation space. A limiting component works in conjunction with the installation components to further limit the fixture's position after installation. The limiting plate's clamping action ensures stable fixation of the light fixture components, preventing loosening after installation. Simultaneously, it facilitates convenient installation of the light fixture before installation, and the locking component simultaneously fixes the limiting component. This not only facilitates on-site construction but also simplifies construction steps, effectively improving installation convenience and the usability of the light fixture on the ceiling joists. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the external top view of the structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the external front view of the structure of the present invention.

[0020] Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0021] Figure 5 This is a partial three-dimensional structural diagram of the mounting component of the present invention.

[0022] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure at point B in the middle.

[0023] Figure 7 This is a three-dimensional structural diagram of the light steel keel of the present invention.

[0024] Figure 8 For the present invention Figure 7 A magnified schematic diagram of the structure at point C.

[0025] Figure 9 This is a front view structural diagram of the light steel keel of the present invention.

[0026] Figure 10 This is a side view of the light steel keel structure of the present invention.

[0027] Explanation of reference numerals in the attached figures 10. Keel assembly; 11. Light steel keel; 12. Overlap platform; 13. Overlap plate; 14. Opening; 20. Gypsum board assembly; 21. Gypsum ceiling; 22. Grooving; 23. Gasket; 30. Mounting components; 31. Connecting plate; 32. Elongated hole; 33. Magnet; 34. Outer extension plate; 35. Inner extension plate; 36. Support platform; 37. Square hole; 40. Lamp body assembly; 41. Lamp holder; 42. Lamp cover; 43. Outer platform; 44. Inner platform; 45. Lamp chip; 46. Connecting wire; 47. Splitter; 48. Bus; 49. Transformer; 50. Locking assembly; 51. Abutment plate; 52. Flange; 53. Bolt; 60. Limiting component; 61. Limiting plate; 62. Guide hole; 63. Protrusion; 64. Warped edge. Detailed Implementation

[0028] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0029] like Figure 1-10 As shown, the light fixture adapted to a T-shaped ceiling joist includes: The keel assembly 10 is composed of a light steel keel 11. The light steel keel 11 has a T-shaped structure and an overlapping plate 13 is provided at the bottom. A gypsum board assembly 20 is provided on the surface of the overlapping plate 13 located inside the light steel keel 11. The mounting component 30 is disposed between the light steel keel 11 and the gypsum board component 20. The mounting component 30 is composed of a connecting plate 31. The bottom of the connecting plate 31 extends to the bottom of the light steel keel 11 and the gypsum board component 20, and the bottom of the connecting plate 31 is fixedly connected to the lamp body component 40 located below the light steel keel 11. The locking assembly 50 is composed of a retaining plate 51, which is disposed on one side of the mounting assembly 30. The retaining plate 51 is internally threaded with bolts 53, which pass through the mounting assembly 30 and the limiting assembly 60 respectively. The limiting assembly 60 is composed of a limiting plate 61, which is disposed inside the connecting plate 31 and passes through the overlapping plate 13 and contacts the top surface of the lamp body assembly 40.

[0030] The light steel keel 11 is fixedly installed to the roof by multiple hangers. The light steel keel 11 consists of a main keel, a secondary keel and a side keel. The side keel is installed on the wall by nails. The light body assembly 40 is set below the main keel and the secondary keel, and the plasterboard assembly 20 is embedded between the main keel and the secondary keel. The bottom end of the light steel keel 11 is provided with two overlapping plates 13. The overlapping plate 13 located on the inner side of the light steel keel 11 has an elongated opening 14, and the limiting plate 61 is slidably connected to the inside of the opening 14. The top end of the light steel keel 11 is provided with an end head. The light steel keel 11 located below the end head forms an overlapping platform 12, and the overlapping platform 12 is in contact with the locking assembly 50.

[0031] In this technical solution, the light steel keel 11 is installed on the roof via hangers. The hangers are installed with expansion screws to ensure the stability of the light steel keel 11. The light steel keel 11 located around the perimeter is installed on the wall via nails, enabling the light steel keel 11 to provide higher load-bearing capacity and ensuring that the plaster ceiling 21 will not fall off after installation. Light fixtures 40 are installed below the light steel keel 11 to provide lighting and also have a good aesthetic appearance. The plaster ceiling 21 can be fitted between the light steel keels 11 and supported by overlapping plates 13. Openings 14 are provided on the overlapping plates 13 of the light steel keel 11 for the installation of limiting components 60, so that the limiting components 60 can move synchronously with the installation components 30, which facilitates on-site position adjustment and simplifies installation. End caps are provided at the top of the light steel keel 11 to form an overlapping platform 12, which cooperates with the locking components 50 to achieve stable fixation of the locking components 50 and ensure the stability of subsequent installation.

[0032] The gypsum board assembly 20 consists of multiple gypsum ceiling panels 21, which are embedded between the main keel and the secondary keel. The edges of the gypsum ceiling panels 21 are fitted to the surface of the overlapping plate 13. A groove 22 is formed on the edge of each gypsum ceiling panel 21, and a connecting plate 31 is provided inside the groove 22 to allow the connecting plate 31 to move within the groove 22. An elongated hole 32 is formed at the top of the connecting plate 31, through which a bolt 53 passes. The end of the bolt 53 contacts the side wall of the limiting plate 61, and the bolt 53 is located inside the elongated hole 32. The bottom end of the connecting plate 31 has a bent structure. A horizontally distributed support platform 36 is formed, and the edge of the plaster ceiling 21 is attached to the surface of the support platform 36; the bottom end of the connecting plate 31 is provided with a horizontally distributed outer extension plate 34 and inner extension plate 35, the outer extension plate 34 and inner extension plate 35 are respectively arranged on both sides of the connecting plate 31, and both the outer extension plate 34 and inner extension plate 35 are embedded and inserted into the lamp body assembly 40; a square hole 37 is opened in the middle of the connecting plate 31, the inside of the square hole 37 is inserted through the limiting plate 61, and the square hole 37 is arranged on one side of the support platform 36; a magnet 33 is fixedly connected to the side wall of the connecting plate 31, and the magnet 33 is distributed correspondingly to the limiting plate 61.

[0033] In this technical solution, the gypsum board ceiling 21 can be embedded between the light steel keel 11, and the gap between the gypsum board ceilings 21 forms an expansion joint, which will not cause subsequent cracking and deformation. The groove 22 set on the edge of the gypsum board ceiling 21 can facilitate the movement of the limiting component 60 without affecting the movement of the subsequent installation component 30. At the same time, the gypsum board ceiling 21 can still be supported by the overlapping plate 13 to ensure the stability of the gypsum board ceiling 21 installation. The bottom end of the connecting plate 31 is provided with a support platform 36 for supporting the gypsum board ceiling 21 to ensure construction quality. The outer extension plate 34 and inner extension plate 36 are provided at the bottom of the connecting plate 31. Plate 35 can be installed in conjunction with lamp body assembly 40, so that after lamp body assembly 40 is installed, both outer extension plate 34 and inner extension plate 35 are fitted inside lamp body assembly 40. Square hole 37 is provided to facilitate connection with limiting plate 61, so that limiting plate 61 can move inside square hole 37 when rotating. Magnet 33 is provided to control the angle of limiting plate 61, so that lamp body assembly 40 can be easily installed before installation. After lamp body assembly 40 is installed, the limiting component 60 can be linked by locking component 50. At this time, limiting component 60 presses against lamp body assembly 40 to achieve further stable installation.

[0034] The lamp body assembly 40 is composed of a lamp holder 41. The lamp holder 41 has an outer platform 43 and an inner platform 44 at both ends. The lamp holder 41 has concave openings between its two ends, the outer platform 43, and the inner platform 44. The outer extension plate 34 and the inner extension plate 35 at the bottom of the connecting plate 31 are fitted and connected to the concave openings. The edge of the lamp holder 41 is fitted and installed with the lamp cover 42. The lamp holder 41 located inside the lamp cover 42 is provided with lamp beads 45. There are multiple lamp holders 41. Each lamp holder 41 is connected to a splitter 47 through a connecting line 46. The splitter 47 is connected to a transformer 49 through a bus 48. The lamp holder 41 is located below the light steel keel 11 and the plaster ceiling 21. A gasket 23 is fixedly connected to the surface of the inner platform 44 on one side of the lamp holder 41. The gasket 23 is fitted and connected to the plaster ceiling 21. The outer platform 43 on the other side of the lamp holder 41 is correspondingly located below the limiting plate 61.

[0035] In this technical solution, the lamp holder 41 can be directly fitted and inserted into the surfaces of the outer extension plate 34 and the inner extension plate 35 to realize the installation of the lamp holder 41. At this time, the lamp holder 41 is attached to the bottom surface of the overlapping plate 13 of the light steel keel 11. Since there is a certain gap between the lamp holder 41 and the overlapping plate 13, the lamp holder 41 can be moved smoothly and directly. The friction during the movement is small. With the setting of the shim 23, the wear caused during the movement can be reduced. The splitter 47 and transformer 49 connected to the lamp holder 41 are placed inside the ceiling and connected to the bus 48 through the connecting line 46 to realize subsequent control. At the same time, the outer platform 43 and inner platform 44 on both sides of the lamp holder 41 can cooperate with the bottom of the light steel keel 11 to realize subsequent locking and limiting. The shim 23 on the inner platform 44 corresponds to the plaster ceiling 21, so that the shim 23 plays an anti-friction role when the lamp holder 41 is installed, preventing wear problems on the lamp holder 41 and the light steel keel 11 during installation.

[0036] The clamping plate 51 has an L-shaped structure and is set on one side of the light steel keel 11. The bottom end of the clamping plate 51 is provided with a flange 52, which fits against the overlapping platform 12 on one side of the light steel keel 11. The limiting plate 61 has a bent structure. The side wall of the limiting plate 61 is provided with a protrusion 63. The protrusion 63 is embedded in the groove opened in the side wall of the connecting plate 31. The top end of the limiting plate 61 and the connecting plate 31 are provided with an inclination angle so that the limiting plate 61 can rotate around the protrusion 63. The bottom end of the limiting plate 61 passes through the square hole 37 and the opening 14 respectively. The bottom end of the limiting plate 61 located below the opening 14 is provided with a raised edge 64, which contacts the surface of the outer platform 43. A gap is formed between the outer platform 43 and the overlapping plate 13 for the installation of the lamp body assembly 40.

[0037] In this technical solution, the flange 52 at the bottom of the abutment plate 51 can cooperate with the overlapping platform 12 to fix the abutment plate 51. When the bolt 53 is tightened, the end of the bolt 53 abuts against the limiting plate 61 and forces the limiting plate 61 to rotate, thereby driving the abutment plate 51 closer to the connecting plate 31. Through the continuous tightening of the bolt 53, the abutment plate 51 abuts against the side wall of the connecting plate 31. At this time, the flange 52 cooperates with the overlapping platform 12 to limit the abutment plate 51. At this time, the abutment plate 51 and the connecting plate 31 are located on both sides of the light steel keel 11 and are pressed and limited by compression, thereby fixing the connecting plate 31. When the limiting plate 61 rotates, its bending structure design makes the limiting plate 61 rotate. When the bottom end of the limiting plate 61 rotates around the protrusion 63, the raised edge 64 at the bottom end of the limiting plate 61 is located inside the opening 14 before the bolt 53 is tightened. When the bolt 53 is tightened, the limiting plate 61 rotates, causing the raised edge 64 to move out of the opening 14 and abut against the outer platform 43. At this time, the lamp holder 41 has a downward tendency, and the outer extension plate 34 and the inner extension plate 35 are embedded in the lamp holder 41, thereby achieving the pressing and limiting of the lamp holder 41. The tightening of the bolt 53 can achieve the locking of the connecting plate 31 after adjustment and the stability of the lamp holder 41, thereby achieving convenient installation and improving the performance of the lamp body assembly 40.

[0038] Furthermore, there is a certain gap between the lamp holder 41 and the overlapping plate 13 before installation. The lamp body assembly 40 is moved horizontally from one side of the bottom of the light steel keel 11 to achieve installation, so that the outer extension plate 34 and the inner extension plate 35 are inserted into the lamp holder 41. The outer platform 43 and the inner platform 44 are used to limit the position. During the horizontal movement, the top surface of the lamp holder 41 does not contact the bottom surface of the light steel keel 11 or the plaster ceiling 21. After installation, the bolt 53 is tightened, which drives the limiting plate 61 to rotate so that the warp edge 64 abuts against the top surface of the lamp holder 41, thereby achieving subsequent tightness and limiting of the lamp holder 41 and improving the stability after installation.

[0039] Specifically, the keel component 10 can be configured into different shapes according to the actual layout, such as... Figure 1 As shown, the arrangement of the light steel keel 11 and the size of the lamp body assembly 40 can be adjusted appropriately.

[0040] This invention is not limited to the embodiments described above. Any changes in shape or structure shall fall within the protection scope of this invention. The protection scope of this invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of this invention, but all such changes and modifications shall fall within the protection scope of this invention.

Claims

1. A light fixture adapted to a T-shaped ceiling joist, characterized in that, The aforementioned light fixture adapted to T-shaped ceiling joists includes: The keel assembly (10) is composed of a light steel keel (11), which is a T-shaped structure and has an overlapping plate (13) at the bottom. The overlapping plate (13) located inside the light steel keel (11) is provided with a gypsum board assembly (20). The mounting assembly (30) is disposed between the light steel keel (11) and the gypsum board assembly (20). The mounting assembly (30) is composed of a connecting plate (31). The bottom of the connecting plate (31) extends to the bottom of the light steel keel (11) and the gypsum board assembly (20), and the bottom of the connecting plate (31) is fixedly connected to the lamp body assembly (40) located below the light steel keel (11). The locking assembly (50) is composed of a retaining plate (51), which is disposed on one side of the mounting assembly (30). The retaining plate (51) is internally threaded with bolts (53), which pass through the mounting assembly (30) and the limiting assembly (60) respectively. The limiting assembly (60) is composed of a limiting plate (61), which is disposed inside the connecting plate (31) and passes through the overlapping plate (13) and contacts the top surface of the lamp body assembly (40).

2. The light fixture adapted to T-shaped ceiling joists as described in claim 1, characterized in that: The light steel keel (11) is fixedly installed to the roof by multiple hangers. The light steel keel (11) consists of a main keel, a secondary keel and a side keel. The side keel is installed on the wall by nails. The main keel and the secondary keel are provided with lamp body components (40) below them, and the gypsum board components (20) are embedded between the main keel and the secondary keel.

3. The light fixture adapted to T-shaped ceiling joists as described in claim 2, characterized in that: The bottom end of the light steel keel (11) is provided with two overlapping plates (13). The overlapping plate (13) located inside the light steel keel (11) has an elongated opening (14). The limiting plate (61) is slidably connected to the opening (14). The top end of the light steel keel (11) is provided with an end head. The light steel keel (11) located below the end head forms an overlapping platform (12). The overlapping platform (12) is in contact with the locking assembly (50).

4. The light fixture adapted to T-shaped ceiling joists as described in claim 1, characterized in that: The gypsum board assembly (20) consists of multiple gypsum ceiling panels (21). Several gypsum ceiling panels (21) are embedded between the main keel and the secondary keel. The edges of the gypsum ceiling panels (21) are attached to the surface of the overlapping plate (13). The edges of the gypsum ceiling panels (21) are provided with grooves (22), and a connecting plate (31) is provided inside the grooves (22) so that the connecting plate (31) can move inside the grooves (22).

5. The light fixture adapted to T-shaped ceiling joists as described in claim 1, characterized in that: The top of the connecting plate (31) has an elongated hole (32), the bolt (53) passes through the connecting plate (31), the end of the bolt (53) contacts the side wall of the limiting plate (61), and the bolt (53) is located inside the elongated hole (32). The bottom of the connecting plate (31) has a bent structure, and a horizontally distributed support platform (36) is formed at the bottom of the connecting plate (31). The edge of the plaster ceiling (21) is attached to the surface of the support platform (36).

6. The light fixture adapted to T-shaped ceiling joists as described in claim 5, characterized in that: The bottom end of the connecting plate (31) is provided with a horizontally distributed outer extension plate (34) and inner extension plate (35). The outer extension plate (34) and inner extension plate (35) are respectively arranged on both sides of the connecting plate (31), and the outer extension plate (34) and inner extension plate (35) are both fitted and inserted into the lamp body assembly (40). A square hole (37) is opened in the middle of the connecting plate (31). The square hole (37) is inserted through the limiting plate (61), and the square hole (37) is arranged on one side of the support platform (36). A magnet (33) is fixedly connected to the side wall of the connecting plate (31), and the magnet (33) is distributed correspondingly to the limiting plate (61).

7. The light fixture adapted to T-shaped ceiling joists as described in claim 1, characterized in that: The lamp body assembly (40) is composed of a lamp holder (41). The lamp holder (41) has an outer platform (43) and an inner platform (44) at both ends. The lamp holder (41) has a concave shape between its two ends and the outer platform (43) and the inner platform (44). The outer extension plate (34) and the inner extension plate (35) at the bottom of the connecting plate (31) are fitted and connected to the concave shape. The edge of the lamp holder (41) is fitted and installed with the lamp cover (42). The lamp holder (41) located inside the lamp cover (42) is provided with lamp beads (45). There are multiple lamp holders (41). Each lamp holder (41) is connected to the splitter (47) through a connecting line (46). The splitter (47) is connected to the transformer (49) through a bus (48).

8. The light fixture adapted to T-shaped ceiling joists as described in claim 7, characterized in that: The lamp holder (41) is located below the light steel keel (11) and the gypsum ceiling (21). A gasket (23) is fixedly connected to the surface of the inner platform (44) on one side of the lamp holder (41). The gasket (23) is in close contact with the gypsum ceiling (21). The outer platform (43) on the other side of the lamp holder (41) is correspondingly located below the limiting plate (61).

9. The light fixture adapted to T-shaped ceiling joists as described in claim 1, characterized in that: The abutment plate (51) has an L-shaped structure and is set on one side of the light steel keel (11). The bottom end of the abutment plate (51) is provided with a flange (52), which is in contact with the overlapping platform (12) on one side of the light steel keel (11).

10. The light fixture adapted to T-shaped ceiling joists as described in claim 1, characterized in that: The limiting plate (61) has a bent structure. The side wall of the limiting plate (61) is provided with a protrusion (63). The protrusion (63) is embedded in the groove opened on the side wall of the connecting plate (31). The top of the limiting plate (61) and the connecting plate (31) are provided with an angle so that the limiting plate (61) can rotate around the protrusion (63). The bottom end of the limiting plate (61) passes through the square hole (37) and the opening (14) respectively. The bottom end of the limiting plate (61) located below the opening (14) is provided with a raised edge (64). The raised edge (64) contacts the surface of the outer platform (43). A gap is formed between the outer platform (43) and the overlapping plate (13) for the installation of the lamp body assembly (40).

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