A UL independent smoke detector
By designing a detachable upper shell and middle frame, with replaceable dustproof stickers and a detachable labyrinth cover, the problem of smoke detector smoke inlet channel blockage is solved, achieving easy maintenance and efficient smoke penetration, and reducing false alarm rate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN FANHAI SANJIANG ELECTRONICS CO LTD
- Filing Date
- 2025-09-10
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional smoke detectors are prone to clogging of their smoke inlet channels, which reduces smoke penetration and makes them difficult for users to maintain, affecting sensitivity and false alarm rate.
The design features a detachable upper shell and middle frame with replaceable dust covers, a detachable maze cover assembly, cleaning tools, and a detection switch for easy maintenance.
The dustproof sticker blocks foreign objects, and the maze cover is removable for easy maintenance, ensuring smoke penetration rate, reducing false alarm rate, and simplifying the maintenance process.
Smart Images
Figure CN224536579U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fire alarm equipment technology, and more specifically, to an American standard stand-alone smoke detector. Background Technology
[0002] A smoke detector is a safety device that triggers a fire warning by monitoring changes in smoke concentration in the environment. Its core function is to buy time for personnel evacuation and firefighting. The structure of a smoke detector typically includes a smoke inlet channel and a labyrinth structure. Traditional smoke labyrinths are closed structures, making maintenance very difficult. After a period of use, the smoke inlet often becomes blocked: lint and fibers block the labyrinth entrance through the outer casing, causing a decrease in smoke penetration rate of >40%. This requires professional disassembly and cleaning. Users cannot handle the decreased sensitivity or false alarms caused by accumulated dust and insect remains. Based on this situation, there is an urgent need for an easy-to-maintain American standard stand-alone smoke detector. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a US standard stand-alone smoke detector, which addresses the above-mentioned deficiencies of the prior art.
[0004] The technical solution adopted by this utility model to solve its technical problem is:
[0005] A US standard stand-alone smoke detector is constructed, comprising a detachably connected upper shell and a middle frame, wherein a smoke inlet channel is formed between the upper shell and the middle frame, and a replaceable dustproof sticker is provided on the inner bottom surface and / or inner top surface of the smoke inlet channel; the upper shell is provided with a mounting through hole, and a labyrinth cover assembly is detachably installed at the mounting through hole, wherein a labyrinth is provided on the labyrinth cover assembly.
[0006] The American Standard Standalone Smoke Detector of this utility model further includes a bottom shell, which is detachably connected to the middle frame; a main control PCBA assembly is provided on the bottom shell, a photoelectric detection unit is provided on the main control PCBA assembly, and a through hole corresponding to the photoelectric detection unit is provided on the middle frame.
[0007] The American Standard stand-alone smoke detector of this utility model further includes a base for external installation; the base is detachably connected to the bottom shell.
[0008] The American standard stand-alone smoke detector of this utility model includes a cleaning tool for cleaning the maze and a storage slot for storing the cleaning tool on the bottom shell.
[0009] The American standard stand-alone smoke detector of this utility model is provided with a detection switch on the main control PCBA component to detect whether the labyrinth cover component has been removed.
[0010] The American standard stand-alone smoke detector of this utility model includes a dustproof sticker comprising a base layer, an adhesive layer on one side surface of the base layer, and multiple blocking elements for blocking foreign objects on the other side surface.
[0011] The American standard stand-alone smoke detector of this utility model has multiple dividing strips on the smoke inlet channel, which divide the smoke inlet channel into multiple areas. Each area has a dustproof sticker on its inner bottom surface and / or inner top surface.
[0012] The American standard stand-alone smoke detector of this utility model includes a maze cover assembly comprising a detachable cover and a maze cover that are connected or integrally formed; the detachable cover is detachably connected to the upper shell, and the maze is provided on the maze cover.
[0013] The American standard stand-alone smoke detector of this utility model has multiple swivel buckles on the outer surface of the detachable top cover, and the inner wall of the mounting through hole has swivel buckle slots that correspond to and engage with the swivel buckles one by one.
[0014] The American standard stand-alone smoke detector of this utility model includes a first positioning ring at the lower end of the labyrinth cover and a first positioning step on the middle frame for positioning the first positioning ring; a second positioning ring is formed at the upper end of the detachable cover, and a second positioning step for positioning the second positioning ring is provided on the inner wall of the mounting through hole.
[0015] The beneficial effects of this utility model are as follows: by using the smoke detector of this application, foreign objects can be blocked or stuck by the dustproof sticker, reducing the chance of foreign objects entering the maze. During maintenance, the dustproof sticker can be replaced after the upper shell and middle frame can be removed. At the same time, the maze cover assembly can also be removed from the upper shell for maintenance, thus not only ensuring the smoke penetration rate, but also making maintenance extremely convenient. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the structure of a US standard stand-alone smoke detector according to a preferred embodiment of the present invention;
[0018] Figure 2 This is an exploded view of a preferred embodiment of the American standard stand-alone smoke detector of this utility model;
[0019] Figure 3 This is a schematic diagram of the labyrinth cover assembly of a US standard stand-alone smoke detector according to a preferred embodiment of the present invention.
[0020] Figure 4 This is a cross-sectional view of a preferred embodiment of the American Standard stand-alone smoke detector of this utility model;
[0021] Figure 5 This is a schematic diagram of the labyrinth structure of a US standard stand-alone smoke detector according to a preferred embodiment of this utility model;
[0022] Figure 6 This is a cross-sectional view of the dustproof sticker installation of a preferred embodiment of the American Standard stand-alone smoke detector of this utility model;
[0023] Figure 7 This is a schematic diagram of the dustproof sticker structure of the American Standard stand-alone smoke detector according to a preferred embodiment of the present invention. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0025] The preferred embodiment of this utility model is a US standard stand-alone smoke detector, such as... Figure 1 As shown, see also Figures 2-7 It includes a detachably connected upper shell 1 and middle frame 2, with a smoke inlet channel 3 formed between the upper shell 1 and the middle frame 2, and a replaceable dustproof sticker 30 provided on the inner bottom surface and / or inner top surface of the smoke inlet channel 3; the upper shell 1 is provided with a mounting through hole 10, and a maze cover assembly 4 is detachably provided at the mounting through hole 10, and a maze 40 is provided on the maze cover assembly 4;
[0026] The smoke detector of this application uses the dust cover 30 to block or stick foreign objects, reducing the chance of foreign objects entering the maze. During maintenance, the dust cover 30 can be replaced after removing the upper shell 1 and the middle frame 2. At the same time, the maze cover assembly 4 can also be removed from the upper shell 1 for maintenance, which not only ensures the smoke penetration rate, but also makes maintenance extremely convenient.
[0027] Preferably, this application provides a stand-alone smoke detector that conforms to the UL217 10th standard. The outer shell material of the product conforms to the UL94 5VA flame retardant standard. The smoke detector has a transparent test button 11 on its appearance and a built-in multi-color light that can indicate the status of the smoke detector through various lights. The sound outlet 12 on the outer shell and the internal cavity design enable the product alarm sound pressure to meet the UL217 requirement of ≥85dB at 3 meters.
[0028] Preferably, the American standard stand-alone smoke detector also includes a bottom shell 5, which is detachably connected to the middle frame 2; a main control PCBA assembly 6 is provided on the bottom shell 5, and a photoelectric detection unit 60 is provided on the main control PCBA assembly 6; a battery 50 can be provided on the bottom shell 5 to power the main control PCBA assembly 6; and a through hole 20 corresponding to the photoelectric detection unit 60 is provided on the middle frame 2; that is, the whole adopts a detachable design for easy assembly. After installation, the photoelectric detection unit 60 passes through the through hole 20 and cooperates with the maze 40.
[0029] Preferably, the American Standard stand-alone smoke detector also includes a base 7, which is used for external installation (the installation can be done by a combination of gourd holes and screws, or by adhesive bonding, etc., which is not limited); the base 7 is detachably connected to the bottom shell 5, preferably by a snap-fit connection, but screw connection is also possible.
[0030] Preferably, the bottom shell 5 is provided with a cleaning tool 51 for cleaning the maze and a storage slot 52 for storing the cleaning tool; when the maze needs to be maintained, the cleaning tool 51 can be taken out for operation; the cleaning tool is preferably in the form of a cleaning brush.
[0031] Preferably, the main control PCBA assembly 6 is equipped with a detection switch 61 for detecting whether the maze cover assembly 4 has been removed. The detection switch 61 is set to provide a reminder when the removal is normal and to sound an alarm when the cover is accidentally loosened.
[0032] Preferably, the dustproof sticker 30 includes a base layer 300, one side surface of the base layer 300 is provided with an adhesive layer 301, and the other side surface is provided with a plurality of blocking elements 302 (preferably with a hook structure) to block foreign objects; the structure is simple and the maintenance cost is low; it is understood that in addition to the above three layers, new functional layers can be added as needed, and the solutions obtained by the extension based on the structure of this application also fall within the scope of protection of this application.
[0033] Preferably, a lifting strip 303 is provided on the side of the base layer 300. The purpose of the lifting strip 303 is to facilitate holding during replacement. The lifting strip 303 itself is not adhesive and can be placed on any side away from the maze 40. The adhesive layer 301 is a traceless adhesive layer to avoid leaving marks that may affect the subsequent replacement of the dust cover 30. The dust cover 30 is a flame-retardant dust cover and can be selected with a UL94 V0 flame-retardant rating to improve safety.
[0034] Preferably, the smoke inlet channel 3 is provided with multiple partition strips 31, which divide the smoke inlet channel 3 into multiple areas. Each area has a dustproof sticker 30 on its inner bottom surface and / or inner top surface.
[0035] Preferably, the maze cover assembly 4 includes a detachable cover 41 and a maze cover 42 that are connected or integrally formed; the detachable cover 41 is detachably connected to the upper shell 1, and the maze cover 42 is provided with a maze 40; the maze cover assembly 4 consists of two parts to facilitate separate processing.
[0036] Preferably, the outer surface of the detachable top cover 41 is provided with a plurality of buckles 410, and the inner wall of the mounting through hole 10 is provided with buckle slots 100 that correspond one-to-one with the buckles 410; with this buckle design, tool-free disassembly can be achieved; of course, it is understood that this detachable setting can also be replaced by other existing structures, and the solution obtained based on such replacement also falls within the protection scope of this application.
[0037] Preferably, the lower end of the maze cover 42 is provided with a first positioning ring 420, and the middle frame 2 is provided with a first positioning step 21 for positioning the first positioning ring 420; the upper end of the detachable cover 41 is formed with a second positioning ring 411, and the inner wall of the mounting through hole 10 is provided with a second positioning step 101 for positioning the second positioning ring 411; the maze is located between the first positioning step 21 and the second positioning step 101. This design can well ensure the reliability of the installation and ensure the accuracy of the maze after installation.
[0038] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.
Claims
1. A US standard stand-alone smoke detector, characterized in that, It includes a detachably connected upper shell and a middle frame, with a smoke inlet channel formed between the upper shell and the middle frame, and a replaceable dustproof sticker provided on the inner bottom surface and / or inner top surface of the smoke inlet channel; the upper shell is provided with a mounting through hole, and a maze cover assembly is detachably provided at the mounting through hole, and a maze is provided on the maze cover assembly.
2. The American standard stand-alone smoke detector according to claim 1, characterized in that, The American standard stand-alone smoke detector also includes a bottom shell, which is detachably connected to the middle frame; a main control PCBA assembly is provided on the bottom shell, a photoelectric detection unit is provided on the main control PCBA assembly, and a through hole corresponding to the photoelectric detection unit is provided on the middle frame.
3. The American standard stand-alone smoke detector according to claim 2, characterized in that, The American standard stand-alone smoke detector also includes a base for external mounting; the base is detachably connected to the bottom shell.
4. The American standard stand-alone smoke detector according to claim 2, characterized in that, The bottom shell is equipped with cleaning tools for cleaning the maze and a storage slot for storing the cleaning tools.
5. The American standard stand-alone smoke detector according to claim 2, characterized in that, The main control PCBA assembly is equipped with a detection switch to detect whether the maze cover assembly has been removed.
6. The American standard stand-alone smoke detector according to claim 1, characterized in that, The dustproof sticker includes a base layer, one side of which is provided with an adhesive layer, and the other side of which is provided with multiple blocking elements to block foreign objects.
7. The American standard stand-alone smoke detector according to claim 1, characterized in that, The smoke inlet channel is provided with multiple partition strips, which divide the smoke inlet channel into multiple areas. Each area has a dustproof sticker on its inner bottom surface and / or inner top surface.
8. The American standard stand-alone smoke detector according to claim 1, characterized in that, The maze cover assembly includes a detachable cover and a maze cover that are connected or integrally formed; the detachable cover is detachably connected to the upper shell, and the maze is provided on the maze cover.
9. The American standard stand-alone smoke detector according to claim 8, characterized in that, The outer surface of the detachable top cover is provided with multiple swivel buckles, and the inner wall of the mounting through hole is provided with swivel buckle slots that correspond to and engage with the swivel buckles one by one.
10. The American standard stand-alone smoke detector according to claim 8, characterized in that, The lower end of the maze cover is provided with a first positioning ring, and the middle frame is provided with a first positioning step for positioning the first positioning ring; the upper end of the detachable cover is formed with a second positioning ring, and the inner wall of the mounting through hole is provided with a second positioning step for positioning the second positioning ring.