An integrated kitchen ceiling structure

Abstract

The present invention relates to a ceiling structure, and in particular to an integrated kitchen ceiling structure. An integrated kitchen ceiling structure with high stability is provided. An integrated kitchen ceiling structure includes a main ceiling keel, a sub-ceiling keel, a gusset plate, a locking assembly, a trigger assembly, etc.; the bottom of the main ceiling keel can be used for bolts to be evenly arranged to connect the sub-ceiling keel, the sub-ceiling keel is provided with a slide groove, the slide groove is provided with a first through hole, both sides of the sub-ceiling keel are provided with a section of protrusion, the sub-ceiling keel is clamped in the wedge-shaped groove of the gusset plate through the protrusions on both sides, the sub-ceiling keel is provided with a locking assembly for locking and fixing the gusset plate, and the sub-ceiling keel is provided with a trigger assembly for cooperating with the locking assembly to unlock. Under the action of the locking assembly and the trigger assembly, the gusset plate is reinforced and stabilized by a two-section fixing method, and the edge will not easily fall off even if it is infected for a long time in an environment with a lot of water, gasoline and smoke such as a kitchen.

Description

Technical Field

[0001] The present invention relates to a ceiling structure, and particularly to an integrated kitchen ceiling structure. Background Art

[0002] Ceiling refers to a kind of decoration for the top decoration of the housing living environment. Simply speaking, it refers to the decoration of the ceiling, which is an important part of interior decoration. It can be used to cover up the structural defects of the top of the house, and has the functions of heat preservation, heat insulation, sound insulation and sound absorption. It is also a concealed layer for projects such as electrical, ventilation and air conditioning, communication, fire prevention and alarm pipeline equipment. Integrated ceiling, also called integral ceiling, is to make ceiling modules and electrical modules into standard-sized combinable modules and integrate them during installation. Electrical templates include heating, lighting, ventilation and other templates, integrating multiple functions into one.

[0003] Integrated ceiling generally has load-bearing keels, which are divided into main keels and secondary keels. The main keel is used for main load-bearing, and the secondary keel is used for installing ceiling panels. There are also bolts for fastening, as well as hooks for limiting and ceiling panels for decoration. Before installation, it is necessary to measure the area inside the house and select a suitable position to install the main load-bearing keel. The secondary keel is installed on the main keel. Since the production of ceiling panels has different specifications, it is necessary to accurately measure the distance between the secondary keels before installation to match the size of the ceiling panels. The installation of the ceiling panels is achieved by pressing and clamping on the frame of the secondary keel. This results in the situation that if the installation angle of the secondary keel is inaccurate, it is extremely easy for the ceiling panels to bulge locally after installation, affecting the appearance. And under the long-term invasion of water, gasoline and dirt in the kitchen, rust will occur, causing material aging, and some ceiling panels will warp and fall off. Summary of the Invention

[0004] In order to overcome the drawback that the ceiling panels of the existing integrated ceiling will warp and fall off under the long-term invasion of water, gasoline and dirt in the kitchen, the purpose of the present invention is to provide an integrated kitchen ceiling structure with high stability.

[0005] Technical Solution: An integrated kitchen ceiling structure includes a ceiling main keel, a ceiling secondary keel, ceiling panels, a locking assembly, a triggering assembly and an installation assembly. The bottom of the ceiling main keel is connected to the ceiling secondary keel through evenly arranged bolts. The ceiling secondary keel is provided with a chute, and a first through hole is opened on the chute. There is a section of protrusion on both sides of the ceiling secondary keel. The ceiling secondary keels are clamped in the wedge-shaped grooves of the ceiling panels through the protrusions on both sides. A locking assembly for locking and fixing the ceiling panels is arranged on the ceiling secondary keel. A triggering assembly for cooperating with the locking assembly to unlock is arranged on the ceiling secondary keel. An installation assembly for installing and fixing the ceiling main keel is arranged on the ceiling main keel.

[0006] In one embodiment, an integrated lamp is further included. Exhaust vents for discharging peculiar smell are arranged on both sides of the ceiling panel, and a detachable integrated lamp is provided in the middle of the ceiling panel.

[0007] In one embodiment, the locking assembly includes a first fixing plate, a T-shaped block, a sliding plate, a first spring, an L-shaped fixing rod, a connecting plate, a water-drop-shaped contact plate and a second spring. First fixing plates are symmetrically and fixedly connected to the front and rear sides of the ceiling panel in the left-right direction. A notch is provided on the first fixing plate. Sliding plates are slidably connected to both sides of the secondary ceiling joist. The T-shaped block is slidably connected to the sliding plate. A first spring is arranged between the T-shaped block and the sliding plate. The T-shaped block is in contact with the notch on the first fixing plate in a matching manner. The L-shaped fixing rod is slidably connected to the secondary ceiling joist. A connecting plate is arranged at the lower part of the L-shaped fixing rod. A second spring is wound around the L-shaped fixing rod between the connecting plate and the secondary ceiling joist. The upper part of the L-shaped fixing rod is connected to the water-drop-shaped contact plate.

[0008] In one embodiment, the contact surface between the T-shaped block and the first fixing plate is designed as an inclined surface.

[0009] In one embodiment, the locking assembly is detachably installed on the secondary ceiling joist.

[0010] In one embodiment, the triggering assembly includes a trapezoidal spreading plate, a square contact plate, a second fixing plate, a sliding rod, a rhombic rod and a third spring. The trapezoidal spreading plate is connected to the L-shaped fixing rod. The second fixing plate is slidably connected in the chute. The rhombic rod for guiding the sliding of the connecting object is slidably connected to the second fixing plate. Square contact plates are slidably connected to both sides of the rhombic rod. The sliding rod is fixedly connected to the square contact plate. The sliding rod is in sliding contact with the trapezoidal spreading plate. A third spring is arranged between the square contact plate and the rhombic rod.

[0011] In one embodiment, the triggering assembly is detachably installed on the secondary ceiling joist based on the secondary ceiling joist.

[0012] In one embodiment, the installation assembly further includes a connecting sleeve plate, a screw rod, an internally threaded pipe and an expansion bolt. The connecting sleeve plate is slidably arranged on the main ceiling joist. A second through hole for tightening the connecting sleeve plate is opened on the connecting sleeve plate. The screw rod is threadedly connected to the connecting sleeve plate. The internally threaded pipe is threadedly connected to the screw rod. The internally threaded pipe is rotatably connected to the expansion bolt.

[0013] In one of the embodiments, a power-off component is further included, and a power-off component for controlling the opening and closing of the circuit is arranged on the secondary ceiling joist; the power-off component includes a push switch, a wire connection box, a wire shunt box, a connecting rod, and an insulating cover. A connecting rod is fixedly connected to two secondary ceiling joists, a wire shunt box is arranged on the connecting rod, a wire connection box is arranged on the wire shunt box, an insulating cover is arranged on the wire connection box, a push switch is connected to the wire connection box, and the push switch is in contact with the connecting plate in a matching manner.

[0014] The beneficial effects are as follows: Under the action of the locking component and the triggering component, the two-stage fixing method is adopted to reinforce and stabilize the ceiling board, and even in an environment with a lot of water, gasoline, and oil fumes in the kitchen, it will not easily warp and fall off after being invaded for a long time.

[0015] The push-button disassembly method can facilitate and quickly disassemble and install, which greatly facilitates subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structure schematic diagram of the first situation of the present invention.

[0017] Figure 2 It is a three-dimensional structure schematic diagram of the second situation of the present invention.

[0018] Figure 3 It is a three-dimensional structure schematic diagram of the secondary ceiling joist, chute, first through hole, and ceiling board of the present invention.

[0019] Figure 4 It is a three-dimensional structure schematic diagram of the first perspective of the locking component of the present invention.

[0020] Figure 5 It is a three-dimensional structure schematic diagram of the second perspective of the locking component of the present invention.

[0021] Figure 6 It is a three-dimensional structure schematic diagram of the triggering component of the present invention.

[0022] Figure 7 It is a three-dimensional structure schematic diagram of the power-off component of the present invention.

[0023] Figure 8 It is a three-dimensional structure schematic diagram of the installation component of the present invention.

[0024] In the attached drawing reference numerals: 1 - main ceiling keel; 2 - secondary ceiling keel; 2001 - chute; 2002 - first through hole; 3 - ceiling board; 3001 - wedge-shaped groove; 4 - air outlet; 5 - integrated lighting fixture; 6 - locking assembly; 6001 - first fixing plate; 6002 - notch; 6003 - T-shaped clamping block; 6004 - sliding plate; 6005 - first spring; 6006 - L-shaped fixing rod; 6007 - connecting plate; 6008 - drop-shaped contact plate; 6009 - second spring; 7 - triggering assembly; 7001 - trapezoidal spreading plate; 7002 - square contact plate; 7003 - second fixing plate; 7004 - sliding rod; 7005 - diamond-shaped rod; 7006 - third spring; 8 - power-off assembly; 8001 - pressing switch; 8002 - wire connection box; 8003 - wire shunt box; 8004 - connecting rod; 8005 - insulating cover; 9 - mounting assembly; 9001 - connecting sleeve plate; 9002 - second through hole; 9003 - screw; 9004 - internally threaded pipe; 9005 - expansion bolt. Detailed implementation mode

[0025] The present invention will be further described below with reference to the embodiments shown in the attached drawings.

[0026] Embodiment 1

[0027] An integrated kitchen ceiling structure, as Figures 1 - 3 shown, includes a main ceiling keel 1, a secondary ceiling keel 2, a ceiling board 3, a locking assembly 6, a triggering assembly 7 and a mounting assembly 9. The bottom of the main ceiling keel 1 can be connected to the secondary ceiling keel 2 by bolts arranged evenly. The top of the secondary ceiling keel 2 is provided with a chute 2001, and a first through hole 2002 for connecting to the main ceiling keel 1 is opened on the chute 2001. There is a section of protrusion on both sides of the secondary ceiling keel 2. The secondary ceiling keels 2 are clamped in the wedge-shaped grooves 3001 of the ceiling board 3 through the protruding parts on both sides. A locking assembly 6 for locking and fixing the ceiling board 3 is arranged on the secondary ceiling keel 2. A triggering assembly 7 for cooperating with the locking assembly 6 to unlock is arranged on the secondary ceiling keel 2. A mounting assembly 9 for installing and fixing the main ceiling keel 1 is arranged on the main ceiling keel 1.

[0028] Integrated ceiling, also known as overall ceiling, is to make the ceiling module and electrical module into combinable modules of standard specifications and integrate them during installation. The electrical templates include heating, lighting, ventilation and other templates, integrating multiple functions into one. Before laying and installing the integrated ceiling in the kitchen, it is necessary to use a measuring ruler to measure the indoor area size. After measurement, select a suitable main ceiling keel 1 according to the actual indoor size. Uniformly sleeve the connecting sleeve plate 9001 on the load-bearing main ceiling keel 1 at an interval of 50 cm, and then use bolts to pass through the second through hole 9002 to tighten and fix it. Connect the bottom of the screw rod 9003 to the connecting sleeve plate 9001 through bolts. During connection, do not tighten and fix it temporarily to facilitate subsequent fine-tuning. Then connect the top of the screw rod 9003 to the expansion bolt 9005, drive the expansion bolt 9005 into the ceiling and turn the nut to fix it to prevent it from falling. After the main ceiling keel 1 is installed, use a level to level it, and adjust the height position of the main keel by rotating the nut. After all the main ceiling keels 1 are in the same horizontal plane, the secondary ceiling keels 2 can be built under the main ceiling keel 1. In this embodiment, the ceiling panels 3 of the specification 300 mm×300 mm are used. The keels can be evenly distributed horizontally or vertically, and cannot be staggered. If they are staggered, there will be a height difference between the secondary ceiling keels 2 and the ceiling panels 3 cannot be installed. The interval between two adjacent secondary ceiling keels 2 is adjusted to 300 mm. The secondary ceiling keel 2 and the main ceiling keel 1 are in surface contact and fixed by bolts passing through the first through hole 2002, so that the secondary ceiling keel 2 is in a horizontal and vertical state. After the keel framework is built, the ceiling panels 3 can be installed. The folded part of the edge of the ceiling panel 3 is buckled upward between the secondary ceiling keels 2, and the wedge-shaped groove 3001 on the ceiling panel 3 fits with the protruding part of the secondary ceiling keel 2 to initially buckle and lock the ceiling panel 3.

[0029] Embodiment 2

[0030] On the basis of Embodiment 1, as Figure 4 、 Figure 5As shown, the locking assembly 6 includes a first fixing plate 6001, a T-shaped block 6003, a sliding plate 6004, a second spring 6009, an L-shaped fixing rod 6006, a connecting plate 6007, a water-drop-shaped contact plate 6008, and a third spring 7006. First fixing plates 6001 are symmetrically welded to the front and rear sides of the buckle plate 3 in the left-right direction. A notch 6002 is formed in the first fixing plate 6001. The sliding plate 6004 is slidably connected to both sides of the suspended ceiling secondary keel 2. The sliding plate 6004 is slidable and detachable on the suspended ceiling secondary keel 2. The T-shaped block 6003 is slidably connected to the sliding plate 6004. The contact surface between the T-shaped block 6003 and the first fixing plate 6001 is designed as an inclined surface. A first spring 6005 is provided between the T-shaped block 6003 and the sliding plate 6004. The T-shaped block 6003 is in contact and cooperation with the notch 6002 on the first fixing plate 6001. The L-shaped fixing rod 6006 is slidably connected to the suspended ceiling secondary keel 2. The L-shaped fixing rod 6006 can be slid out on the suspended ceiling secondary keel 2 for convenient disassembly. The connecting plate 6007 is slidably arranged up and down at the lower part of the L-shaped fixing rod 6006. The second spring 6009 is wound around the L-shaped fixing rod 6006 between the connecting plate 6007 and the suspended ceiling secondary keel 2. The upper part of the L-shaped fixing rod 6006 is connected to the water-drop-shaped contact plate 6008. The water-drop-shaped contact plate 6008 is in contact with the T-shaped blocks 6003 on both sides. After the T-shaped block 6003 penetrates into the notch 6002, the first spring 6005 is in a compressed state. The locking assembly 6 is detachably installed on the suspended ceiling secondary keel 2.

[0031] As Figure 1 , Figure 6 shown, the triggering assembly 7 includes a trapezoidal spreading plate 7001, a square contact plate 7002, a second fixing plate 7003, a sliding rod 7004, a rhombic rod 7005, and a third spring 7006. The trapezoidal spreading plate 7001 is rotatably connected to the L-shaped fixing rod 6006. The second fixing plate 7003 is slidably connected in the chute 2001. The rhombic rod 7005 for directional sliding of the connecting object is slidably connected to the second fixing plate 7003. Square contact plates 7002 are slidably connected to both sides of the rhombic rod 7005. The square contact plate 7002 can slide on the rhombic rod 7005. A sliding rod 7004 is fixedly connected to the square contact plate 7002. The sliding rod 7004 is in sliding contact with the trapezoidal spreading plate 7001. When the trapezoidal spreading plate 7001 moves upward and contacts the sliding rod 7004, the sliding rod 7004 drives the square contact plates 7002 to move away from each other on both sides. A third spring 7006 is provided between the square contact plate 7002 and the rhombic rod 7005. While the sliding rod 7004 drives the square contact plates 7002 to move away from each other on both sides, the third spring 7006 is compressed. The triggering assembly 7 is detachably installed on the suspended ceiling secondary keel 2 based on the suspended ceiling secondary keel 2.

[0032] As Figure 1 ,Figure 8 As shown in the figure, the installation component 9 further includes a connecting sleeve plate 9001, a screw rod 9003, an internally threaded tube 9004, and an expansion bolt 9005. A connecting sleeve plate 9001 for fixing the main ceiling keel 1 is slidably connected to the main ceiling keel 1. A second through hole 9002 for tightening the connecting sleeve plate 9001 is provided on the connecting sleeve plate 9001. A screw rod 9003 is threadedly connected to the connecting sleeve plate 9001. An internally threaded tube 9004 is threadedly connected to the screw rod 9003. The top of the internally threaded tube 9004 is rotatably connected to the expansion bolt 9005.

[0033] The sliding plate 6004 is slidably connected to the secondary ceiling keel 2. While the ceiling board 3 is installed on the secondary ceiling keel 2, the first fixing plate 6001 on the ceiling board 3 pushes the T-shaped block 6003 along the inclined surface in contact with the T-shaped block 6003, and the first spring 6005 is compressed. The T-shaped block 6003 slides within the sliding plate 6004. After the ceiling board 3 reaches the limit position, the T-shaped block 6003 is snapped into the first fixing plate 6001 to achieve secondary fixation. When it is necessary to remove the ceiling board 3, the connecting plate 6007 at the bottom of the secondary ceiling keel 2 is pressed upward. While the connecting plate 6007 moves upward, it drives the L-shaped fixing rod 6006 to move upward synchronously and compresses the second spring 6009. The upward movement of the L-shaped fixing rod 6006 drives the trapezoidal spreading plate 7001 to push the two sliding rods 7004 in contact with it away from each other. The sliding rod 7004 pushes the square contact plate 7002 fixedly connected to it to slide along the diamond rod 7005. While the square contact plate 7002 slides, it compresses the third spring 7006. The square contact plate 7002 finally contacts the folded part of the ceiling board 3, separating the wedge-shaped groove 3001 from the protruding part of the secondary ceiling keel 2. And during the upward movement of the L-shaped fixing rod 6006, the water-drop-shaped contact plate 6008 is separated from the two T-shaped blocks 6003 on both sides, causing the first spring 6005 to reset and the T-shaped block 6003 to disengage from the notch 6002. After the ceiling board 3 is not limited by other components, it can then be removed. Through the above method, by adopting a two-stage fixing method, the ceiling board 3 is strengthened and stabilized, and it will not easily warp and fall off even after being invaded in an environment with a lot of water, gasoline, and smoke in the kitchen for a long time. And the pressing-type disassembly method can facilitate quick disassembly and installation, greatly facilitating subsequent maintenance.

[0034] Embodiment 3

[0035] On the basis of Embodiment 2, as Figure 2 shown, it further includes an integrated lamp 5. Exhaust vents 4 for discharging odors are provided on both sides of the ceiling board 3. An integrated lamp 5 is provided in the middle of the ceiling board 3. The integrated lamp 5 is combined with the ceiling board 3, and various circuit controls have been integrated inside, and the lamp board can be selectively installed.

[0036] AsFigure 1 , Figure 7 As shown in Figure 7 , it further includes a power-off component 8, and a power-off component 8 for controlling the opening and closing of the circuit is provided on the secondary ceiling joist 2; the power-off component 8 includes a push switch 8001, a wire connection box 8002, a wire shunt box 8003, a connecting rod 8004 and an insulating cover 8005. The connecting rod 8004 is fixedly connected to two secondary ceiling joists 2. A wire shunt box 8003 for shunting the access wires is provided on the connecting rod 8004. A wire connection box 8002 for accessing wires is provided on the wire shunt box 8003. An insulating cover 8005 for preventing electric leakage and electric shock is bolted on the wire connection box 8002. The push switch 8001 is connected to the wire connection box 8002. The push switch 8001 is used to close the wire circuit in the wire connection box 8002, and the push switch 8001 is in contact with the connecting plate 6007 in cooperation.

[0037] At the position where the integrated lamp 5 needs to be installed, it is installed by replacing the ceiling board 3 without the integrated lamp 5. The access wires need to be pre-connected to the wire connection box 8002. The wire connection box 8002 is connected to the wire shunt box 8003. The integrated lamp 5 is connected through the wire shunt box 8003, thus completing the installation of the integrated lamp 5. If the integrated lamp 5 fails and needs to be replaced, by pressing the connecting plate 6007 at the bottom of the secondary ceiling joist 2 upward, when the connecting plate 6007 moves upward, the push switch 8001 will be pressed down. After the push switch 8001 is closed, the lamp is completely powered off, and the ceiling board 3 with the integrated lamp 5 can be removed. In this process, the steps of replacing the integrated lamp 5 have extremely high safety, and there will be no electric leakage or short circuit, avoiding safety accidents.

[0038] It should be understood that this embodiment is only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

Claims

1. An integrated kitchen ceiling structure, comprising a main ceiling keel (1), a secondary ceiling keel (2) and a ceiling board (3). The bottom of the main ceiling keel (1) is connected to the secondary ceiling keel (2) by bolts arranged evenly. There is a section of protrusion on both sides of the secondary ceiling keel (2). The secondary ceiling keels (2) are connected to each other by the protrusion parts on both sides being clamped in the wedge-shaped grooves (3001) of the ceiling board (3). It is characterized in that, It further includes a locking assembly (6), a triggering assembly (7) and a mounting assembly (9). A chute (2001) is provided on the secondary ceiling joist (2), and a first through hole (2002) is formed in the chute (2001). A locking assembly (6) for locking and fixing the ceiling board (3) is provided on the secondary ceiling joist (2), a triggering assembly (7) for cooperating with the locking assembly (6) to unlock is provided on the secondary ceiling joist (2), and a mounting assembly (9) for mounting and fixing the main ceiling joist (1) is provided on the main ceiling joist (1). The locking assembly (6) includes a first fixing plate (6001), a T-shaped block (6003), a sliding plate (6004), a first spring (6005), an L-shaped fixing rod (6006), a connecting plate (6007), a water-drop-shaped contact plate (6008) and a second spring (6009). First fixing plates (6001) are symmetrically and fixedly connected to the front and rear sides of the ceiling board (3) in the left-right direction. A notch (6002) is provided on the first fixing plate (6001). Sliding plates (6004) are slidably connected to both sides of the secondary ceiling joist (2). A T-shaped block (6003) is slidably connected to the sliding plate (6004). A first spring (6005) is provided between the T-shaped block (6003) and the sliding plate (6004). The T-shaped block (6003) is in contact with the notch (6002) on the first fixing plate (6001). An L-shaped fixing rod (6006) is slidably connected to the secondary ceiling joist (2). A connecting plate (6007) is provided at the lower part of the L-shaped fixing rod (6006). A second spring (6009) is wound around the L-shaped fixing rod (6006) between the connecting plate (6007) and the secondary ceiling joist (2). The upper part of the L-shaped fixing rod (6006) is connected to the water-drop-shaped contact plate (6008).

2. The integrated kitchen ceiling structure according to claim 1, characterized in that, It further includes an integrated lamp (5). Air vents (4) for discharging odors are provided on both sides of the ceiling board (3), and a detachable integrated lamp (5) is provided in the middle of the ceiling board (3).

3. An integrated kitchen ceiling structure according to claim 1, characterized in that, The contact surface between the T-shaped block (6003) and the first fixing plate (6001) is designed with an inclined surface.

4. The integrated kitchen ceiling structure according to claim 1, characterized in that, The locking assembly (6) is detachably mounted on the secondary ceiling joist (2).

5. The integrated kitchen ceiling structure according to claim 1, characterized in that, The triggering assembly (7) includes a trapezoidal spreading plate (7001), a square contact plate (7002), a second fixing plate (7003), a sliding rod (7004), a diamond-shaped rod (7005) and a third spring (7006). A trapezoidal spreading plate (7001) is connected to the L-shaped fixing rod (6006). A second fixing plate (7003) is slidably connected in the chute (2001). A diamond-shaped rod (7005) for the directional sliding of a connecting object is slidably connected to the second fixing plate (7003). Square contact plates (7002) are slidably connected to both sides of the diamond-shaped rod (7005). A sliding rod (7004) is fixedly connected to the square contact plate (7002). The sliding rod (7004) is in sliding contact with the trapezoidal spreading plate (7001). A third spring (7006) is provided between the square contact plate (7002) and the diamond-shaped rod (7005).

6. The integrated kitchen ceiling structure according to claim 5, characterized in that, The trigger component (7) is detachably mounted on the secondary ceiling joist (2) based on the secondary ceiling joist (2).

7. An integrated kitchen ceiling structure according to claim 1, characterized in that, The mounting component (9) further includes a connecting sleeve plate (9001), a screw rod (9003), an internally threaded tube (9004), and an expansion bolt (9005). The connecting sleeve plate (9001) is slidably arranged on the main ceiling joist (1). A second through hole (9002) for tightening the connecting sleeve plate (9001) is formed in the connecting sleeve plate (9001). The screw rod (9003) is threadedly connected to the connecting sleeve plate (9001). The internally threaded tube (9004) is threadedly connected to the screw rod (9003). The internally threaded tube (9004) is rotatably connected to the expansion bolt (9005).

8. The integrated kitchen ceiling structure according to claim 1, characterized in that, It further includes a power-off component (8). The power-off component (8) for controlling the opening and closing of the circuit is arranged on the secondary ceiling joist (2). The power-off component (8) includes a pressing switch (8001), a wire connection box (8002), a wire shunt box (8003), a connecting rod (8004), and an insulating cover (8005). The connecting rod (8004) is fixedly connected to two secondary ceiling joists (2). The wire shunt box (8003) is arranged on the connecting rod (8004). The wire connection box (8002) is arranged on the wire shunt box (8003). The insulating cover (8005) is arranged on the wire connection box (8002). The pressing switch (8001) is connected to the wire connection box (8002). The pressing switch (8001) is in contact cooperation with the connecting plate (6007).

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