A ceiling-mounted smoke alarm mechanism

Abstract

This utility model provides a smoke alarm mechanism for ceiling installation, including a magnetic suction base plate. A smoke alarm body is fixedly installed below the magnetic suction base plate. A magnetic suction cup at the upper end of the magnetic suction base plate is attracted and fixed to the lower surface of the perforated ceiling. A fixing rope fixedly installed on the magnetic suction base plate passes through the perforated ceiling and a limiting plate, and then through a tightening cylinder. It then embeds into a vortex groove through a notch in the tightening cylinder. A locking nut and a lower pressure plate are tightened and fixedly installed on the tightening cylinder, pressing and fixing the fixing rope. This utility model uses a magnetic suction cup to adhere to the perforated ceiling, eliminating the need for drilling, resulting in high efficiency and low cost. Three or more fixing ropes, passing through the tightening cylinder and vortex groove, along with the locking nut and lower pressure plate, provide a secure connection to prevent falling. The vortex groove structure also facilitates fine-tuning of the alarm position, adapting to various installation environments.

Description

Technical Field

[0001] This utility model belongs to the field of smoke alarm technology, and in particular relates to a smoke alarm mechanism for ceiling use. Background Technology

[0002] Smoke detectors are crucial equipment in fire protection systems. Networked with a fire alarm controller via a bus, they use smoke sensors to detect indoor smoke. Once the smoke concentration reaches a set threshold, an alarm signal is triggered, alerting people to take timely action against potential fire hazards. Ceilings, as an important component of building ceiling decoration, can be divided into two types: openwork and solid.

[0003] According to relevant national standards, when the open area of ​​a suspended ceiling is less than 15% of the total area, the smoke detector should be installed below the ceiling; when the open area is greater than 30%, it should be installed above the ceiling; and if it is between 15% and 30%, the installation location should be determined based on actual test results. However, when installing a smoke detector on a suspended ceiling with an open area of ​​less than 15%, the narrow gaps make it difficult for bolts and fasteners to pass through, usually requiring subsequent drilling for fixation. This installation method not only damages the structural integrity of the ceiling, affecting its aesthetics and overall performance, but may also reduce the ceiling's load-bearing capacity, posing certain safety hazards. Furthermore, the drilling process is cumbersome, time-consuming, and labor-intensive, hindering installation efficiency.

[0004] Therefore, it is very necessary to invent a smoke alarm mechanism for ceiling-mounted devices. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a smoke alarm mechanism for ceiling use, including a magnetic suction base, a smoke alarm body, a magnetic suction cup, a perforated ceiling, a fixing rope, a limiting plate, a tightening cylinder, a notch, a vortex groove, a locking nut, and a lower pressure plate. The smoke alarm body is fixedly installed below the magnetic suction base. The magnetic suction cup at the upper end of the magnetic suction base is attracted and fixed to the lower surface of the perforated ceiling. The fixing rope fixedly installed on the magnetic suction base passes through the perforated ceiling and the limiting plate, and then passes into the tightening cylinder. Finally, it is embedded into the vortex groove through the notch of the tightening cylinder itself. The locking nut and the lower pressure plate are tightened and fixedly installed on the tightening cylinder, and press and fix the fixing rope.

[0006] Preferably, the perforated area of ​​the perforated ceiling is less than 15% of the total area, and the magnetic low plate and the limiting plate set at the upper and lower positions of the perforated ceiling have the same shape and size.

[0007] Preferably, at least three fixed ropes are provided around the magnetic suction cup embedded in the magnetic suction plate. The upper ends of the fixed ropes pass through the hollow hole of the hollow ceiling and the through hole of the limiting plate in sequence, and pass into the tightening cylinder that is integrally provided in the limiting plate itself. The outer surface of the tightening cylinder is provided with threads that match the locking nut and the lower pressure plate.

[0008] Preferably, the tightening cylinder has a through notch that allows the fixing rope to pass through, and the lower part of the notch is connected to the inner end of the vortex groove opened on the upper surface of the limiting plate.

[0009] Preferably, the upper end of the fixed winding rope passes through the notch of the tightening cylinder and is coiled in the vortex groove, wherein the vortex groove is a horizontal vortex groove structure.

[0010] Preferably, the locking nut and the lower pressure plate tightened on the tightening cylinder are integrally formed. The locking nut is located above the lower pressure plate, and the lower surface of the lower pressure plate is provided with anti-slip texture. The lower pressure plate firmly presses the fixed winding rope in the vortex groove.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] This invention uses a magnetic suction cup on a magnetic base plate to adhere to the lower surface of a perforated ceiling, eliminating the need for drilling holes in the ceiling and avoiding damage to the integrity of the ceiling structure. At the same time, the installation process is simple and quick, which can greatly improve installation efficiency and reduce installation costs.

[0013] Furthermore, this utility model features at least three fixed ropes around the magnetic lower plate. These ropes pass through the perforated ceiling and the limiting plate, then are embedded into the vortex groove through a notch on the tightening cylinder, and finally secured by a locking nut and a lower pressure plate. This structural design creates a stable connection between the smoke alarm mechanism and the ceiling, effectively preventing the smoke alarm body from falling and ensuring its stability during use.

[0014] This utility model features a horizontal vortex groove structure, allowing the fixed winding rope to coil within the vortex groove. By tightening or loosening the locking nut and the lower pressure plate, the position and tightness of the fixed winding rope can be easily adjusted. This allows for fine-tuning of the installation position of the smoke alarm body according to actual needs, adapting to different installation environments and requirements. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the structure of this utility model installed under a hollow ceiling.

[0017] Figure 3This is a schematic diagram of the structure of the locking nut of this utility model after disassembly.

[0018] Figure 4 This is an exploded structural diagram of the present invention.

[0019] In the picture:

[0020] 1. Magnetic suction plate, 2. Smoke alarm body, 3. Magnetic suction plate, 4. Hollow ceiling, 5. Fixed rope, 6. Restricting plate, 7. Tightening cylinder, 8. Notch, 9. Vortex groove, 10. Locking nut, 11. Lower pressure plate. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0022] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.

[0023] As attached Figure 1 To be continued Figure 4 As shown:

[0024] This utility model provides a smoke alarm mechanism for ceiling installation, comprising a magnetic base plate 1, a smoke alarm body 2, a magnetic suction cup 3, a perforated ceiling 4, a fixing rope 5, a limiting plate 6, a tightening cylinder 7, a notch 8, a vortex groove 9, a locking nut 10, and a lower pressure plate 11. The smoke alarm body 2 is fixedly installed below the magnetic base plate 1. The magnetic suction cup 3 at the upper end of the magnetic base plate 1 is attracted and fixed to the lower surface of the perforated ceiling 4. The fixing rope 5, fixedly installed on the magnetic base plate 1, passes through the perforated ceiling 4 and the limiting plate 6, and enters the tightening cylinder 7. Then, it is embedded into the vortex groove 9 through the notch 8 of the tightening cylinder 7. The locking nut 10 and the lower pressure plate 11 are tightened and fixedly installed on the tightening cylinder 7, and press and fix the fixing rope 5.

[0025] Furthermore, the perforated area of ​​the perforated ceiling 4 is less than 15% of the total area. It is integrally formed from high-strength aluminum alloy and the surface is anodized, providing excellent wear resistance and corrosion resistance. The magnetic low plate 1 and the limiting plate 6, located at the top and bottom of the perforated ceiling 4, are identical in shape and size, both being circular structures with diameters that match the corresponding installation areas on the perforated ceiling 4, ensuring precise alignment and facilitating installation and fixation. Both are made of aluminum alloy compatible with the perforated ceiling 4, ensuring the strength and stability of the overall structure.

[0026] Furthermore, at least three fixing ropes 5 are provided around the magnetic suction cup 3 embedded in the magnetic suction lower plate 1. The fixing ropes 5 are made of high-strength Kevlar fiber rope, which has the characteristics of high strength, light weight, and wear resistance, and can withstand large tensile forces. The upper end of the fixing rope 5 passes through the hollow hole of the hollow ceiling 4 and the through hole of the limiting plate 6 in sequence, and passes into the tightening cylinder 7 integrally set in the limiting plate 6 itself. The tightening cylinder 7 is made of stainless steel and is integrally formed with the limiting plate 6 through a precision casting process. Its outer surface is provided with standard triangular threads that match the locking nut 10 and the lower pressure plate 11. The thread precision level reaches 6g to ensure the tightness and reliability of the threaded connection.

[0027] Furthermore, the tightening cylinder 7 has a through-hole 8 that allows the fixing rope 5 to pass through. The width of the through-hole 8 is slightly larger than the diameter of the fixing rope 5, which ensures that the fixing rope 5 can pass through smoothly and also provides a certain limiting effect after the fixing rope 5 is fixed. The lower part of the through-hole 8 is connected to the inner end of the vortex groove 9 opened on the upper surface of the limiting plate 6. The vortex groove 9 is machined by CNC milling.

[0028] Furthermore, the upper end of the fixing rope 5 passes through the notch 8 of the tightening cylinder 7 and coils within the vortex groove 9. The vortex groove 9 is a horizontal vortex groove structure with an optimized helical angle, ensuring that the fixing rope 5 is evenly stressed during coiling and avoiding localized stress concentration. During installation, after the fixing rope 5 is passed through the corresponding holes in sequence, its length can be easily and quickly adjusted by manually coiling it along the vortex groove 9 to adapt to different installation requirements.

[0029] Furthermore, the locking nut 10 and the lower pressure plate 11, which are screwed onto the tightening cylinder 7, are integrally formed and injection molded from high-strength engineering plastic, possessing excellent mechanical properties and chemical corrosion resistance. The locking nut 10 is positioned above the lower pressure plate 11, whose lower surface is provided with anti-slip textures. The anti-slip textures feature an interlaced diamond-shaped protrusion design, which increases the friction between the anti-slip nut 10 and the fixed winding rope 5. When the locking nut 10 is tightened, the lower pressure plate 11 firmly presses down on the fixed winding rope 5 within the vortex groove 9, preventing the fixed winding rope 5 from loosening and ensuring the smoke alarm mechanism is securely and reliably installed.

[0030] The working principle is as follows: First, during installation, the magnetic suction cup 3 on the magnetic suction base 1 is attached to the lower surface of the perforated ceiling 4, using magnetic force to initially fix the smoke alarm mechanism. Next, the fixing rope 5 on the magnetic suction base 1 is passed through the perforated holes of the perforated ceiling 4, the through holes of the limiting plate 6, and then into the tightening cylinder 7. The fixing rope 5 is then embedded into the vortex groove 9 through the notch 8. The length of the fixing rope 5 is manually adjusted by rotating it to suit the installation requirements. Then, the locking nut 10 and the lower pressure plate 11 are tightened onto the tightening cylinder 7. The anti-slip texture on the lower surface of the lower pressure plate 11 is in close contact with the fixing rope 5. The pressure generated by tightening firmly presses the fixing rope 5 into the vortex groove 9, completing the stable installation of the smoke alarm mechanism.

[0031] After installation, the smoke detector body 2 enters the working state and continuously monitors the smoke concentration in the surrounding environment. When the smoke concentration exceeds the preset threshold, the smoke detector body 2 activates the alarm function, emitting an audible and visual alarm signal to alert people in the vicinity of the fire hazard. At the same time, the alarm information is transmitted to the fire alarm controller via the bus so that the fire protection system can respond in a timely manner.

[0032] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A ceiling smoke alarm device, characterized by comprising: The device includes a magnetic suction base plate (1), a smoke alarm body (2), a magnetic suction plate (3), a perforated ceiling (4), a fixed rope (5), a limiting plate (6), a tightening cylinder (7), a notch (8), a vortex groove (9), a locking nut (10), and a lower pressure plate (11). The smoke alarm body (2) is fixedly installed below the magnetic suction base plate (1). The magnetic suction plate (3) at the upper end of the magnetic suction base plate (1) is attracted and fixed to the lower surface of the perforated ceiling (4). The fixed rope (5) fixedly installed on the magnetic suction base plate (1) passes through the perforated ceiling (4) and the limiting plate (6), and passes into the tightening cylinder (7). Then, it is embedded into the vortex groove (9) through the notch (8) of the tightening cylinder (7). The locking nut (10) and the lower pressure plate (11) are tightened and fixedly installed on the tightening cylinder (7) and press and fix the fixed rope (5).

2. A ceiling smoke alarm unit as claimed in claim 1 wherein: The hollowed-out area of ​​the hollowed-out ceiling (4) is less than 15% of the total area. The magnetic suction plate (1) and the limiting plate set at the upper and lower positions of the hollowed-out ceiling (4) have the same shape and size.

3. A ceiling smoke alarm mechanism as defined in claim 2 wherein: At least three fixed ropes (5) are provided around the magnetic suction cup (3) embedded in the magnetic suction plate (1). The upper end of the fixed rope (5) passes through the hollow hole of the hollow ceiling (4) and the through hole of the limiting plate (6) in sequence, and passes into the tightening cylinder (7) integrally provided by the limiting plate (6). The outer surface of the tightening cylinder (7) is provided with threads that match the locking nut (10) and the lower pressure plate (11).

4. A ceiling smoke alarm unit as claimed in claim 3 wherein: The tightening cylinder (7) has a through notch (8) that allows the fixed winding rope (5) to pass through. The lower part of the notch (8) is connected to the inner end of the vortex groove (9) opened on the upper surface of the limiting plate (6).

5. A ceiling smoke alarm unit as claimed in claim 4 wherein: The upper end of the fixed winding rope (5) passes through the notch (8) of the tightening cylinder (7) and coils in the vortex groove (9), which is a horizontal vortex groove structure.

6. A ceiling smoke alarm unit as claimed in claim 5 wherein: The locking nut (10) and the lower pressure plate (11) screwed on the tightening cylinder (7) are integrated. The locking nut (10) is located above the lower pressure plate (11). The lower surface of the lower pressure plate (11) is provided with anti-slip texture, and the lower pressure plate (11) firmly presses the fixed winding rope (5) in the vortex groove (9).

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