A smoke alarm for fire protection

Abstract

The application belongs to the technical field of smoke alarms, and discloses a fire-fighting smoke alarm which comprises a mounting plate and a smoke alarm body arranged at the bottom of the mounting plate. A dustproof assembly for shielding dust in the air entering the smoke alarm body is arranged on the smoke alarm body. A plurality of mounting through holes are arranged through the top of the mounting plate. A fixing assembly is arranged on the mounting plate. The number of the fixing assemblies is equal to the number of the mounting through holes, and the positions of the fixing assemblies correspond to the positions of the mounting through holes one by one. The fixing assembly comprises a positioning unit. The positioning unit comprises a pressing block fixed on the top of the mounting plate near the position of the mounting through hole and a pressing column inserted into the mounting through hole. The pressing block is arranged in two pieces and is arranged symmetrically about the axis of the mounting through hole. The inner diameters of the two pressing blocks gradually increase from top to bottom. The fixing assembly further comprises a lifting unit. The application eliminates the complicated operation of the prior art through the arrangement of the fixing assembly, and improves the installation efficiency of the smoke alarm.

Description

Technical Field

[0001] This utility model relates to the field of smoke alarm technology, and in particular to a smoke alarm for fire protection. Background Technology

[0002] Fire alarms, also known as smoke detectors, are essential devices for preventing household fires. Their main function is to trigger an alarm when a large amount of smoke is detected, thus alerting people to take measures to prevent the fire from starting or spreading. To ensure timely fire detection, smoke alarms are typically installed in groups of ten to fifteen meters.

[0003] A fire-fighting smoke alarm is disclosed in Chinese utility model patent with announcement number CN214670978U. The alarm includes a housing, a cover groove at the top of the housing, multiple mounting holes at the top of the cover groove, and mounting bolts installed in the mounting holes. An inner cover is installed in the cover groove, and a circuit board is provided at the lower end of the inner cover. A speaker is provided on one side of the circuit board. Both the speaker and the circuit board are installed at the top of the housing. A mounting base is fixedly connected to the upper end of the housing, and a mounting plate is provided on the lower side of the circuit board. The outer side of the mounting plate is fixedly connected to the housing by bolts.

[0004] During the installation of the aforementioned alarm, it is necessary to align the multiple mounting holes at the top of the cover groove with the threaded holes pre-drilled in the wall, and then pass multiple bolts through the mounting holes and rotate the bolts to connect with the threaded holes. The operation is rather cumbersome and does not improve the efficiency of installation. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a smoke alarm for fire protection.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a fire smoke alarm, including a mounting plate and an alarm body disposed at the bottom of the mounting plate. The alarm body is provided with a dustproof component for blocking dust in the air entering the alarm body. The top of the mounting plate is provided with multiple mounting through holes. The mounting plate is provided with a fixing component, the number of fixing components being equal to the number of mounting through holes and their positions corresponding one-to-one. The fixing component includes a positioning unit, which includes a clamping block fixed to the top of the mounting plate near the mounting through hole and a clamping column inserted into the mounting through hole. Two clamping blocks are provided and symmetrically arranged about the axis of the mounting through hole. The inner diameter of the two clamping blocks gradually increases from top to bottom. The fixing component also includes a lifting unit for driving the multiple clamping columns to rise and fall synchronously.

[0007] By adopting the above technical solution, during the installation of the mounting plate, the two clamping blocks of the same group are first inserted into the pre-drilled holes in the wall until the mounting plate is in contact with the wall surface. Then, the lifting unit drives multiple clamping columns to rise. Since the inner diameter of the clamping blocks gradually increases from top to bottom, the clamping columns squeeze the two clamping blocks of the same group and deform the two clamping blocks of the same group in a direction away from each other until the clamping blocks are in contact with the holes, thus completing the installation of the mounting plate. This eliminates the cumbersome operation of the existing technology and improves the installation efficiency of the alarm.

[0008] Furthermore, the lifting unit includes a threaded sleeve that is threadedly connected to the mounting plate and an annular rotating plate that is rotatably mounted on the inner side wall of the threaded sleeve, and the clamping column is fixed to the top of the annular rotating plate.

[0009] By adopting the above technical solution, rotating the threaded sleeve can raise and lower both the annular rotating plate connected to the threaded sleeve and the clamping column connected to the annular rotating plate, which facilitates the disassembly or installation of the alarm.

[0010] Furthermore, the dustproof assembly is provided in two sets and is symmetrically arranged about the axis of the mounting plate. Each set of the dustproof assembly includes a dust cover that is plugged into the alarm body, an elastic plate with a "Z" shape fixed to the side wall of the dust cover, a positioning plate with an "L" shape fixed to the upper end of the elastic plate, and a snap-fit ​​block fixed to the side wall of the alarm body. The bottom of the horizontal section of the positioning plate abuts against the top of the snap-fit ​​block. Multiple ventilation holes are provided through the side wall of the dust cover. The dustproof assembly also includes a limiting ring plate fixed to the inner side wall of the dust cover and abutting against the bottom of the mounting plate.

[0011] By adopting the above technical solution, pressing the elastic plate and deforming it towards the axis of the alarm body causes the positioning plate connected to the elastic plate to move away from the locking block until the positioning plate separates from the locking block. At this time, pulling down the dust cover separates the dust cover from the alarm body and allows for cleaning of the dust cover. This reduces the probability that the ventilation holes on the dust cover will be blocked, thus affecting the normal alarm operation of the alarm body.

[0012] Furthermore, the mounting plate and the alarm body are jointly provided with a limiting component. The limiting component includes an annular sleeve fixed to the bottom of the mounting plate and inserted into the alarm body, and a limiting block fixed to the side wall of the alarm body. The side wall of the annular sleeve is provided with a limiting through hole of an "L" shape. The vertical section of the limiting through hole extends to the lower end of the annular sleeve. The limiting block is slidably connected to the horizontal section of the limiting through hole.

[0013] By adopting the above technical solution, the rotating alarm body drives the limit block to rotate until the limit block moves to the vertical section of the limit through hole. At this time, the alarm body is pulled downwards to separate the mounting plate from the alarm body, and the alarm body can be inspected or repaired to ensure that the alarm body can work normally.

[0014] Furthermore, two sets of stops are fixed to the top of the snap-fit ​​block, and the side walls on both sides of the horizontal section of the positioning plate abut against the side walls of the two sets of stops that are close to each other.

[0015] By adopting the above technical solution, the setting of the stop block reduces the probability of the positioning plate falling off the snap-fit ​​block.

[0016] Furthermore, an assist rod is fixed to the side wall of the threaded sleeve.

[0017] By adopting the above technical solution, the rotation of the threaded sleeve is facilitated.

[0018] Furthermore, wavy grooves are provided on the sidewalls of the two abutting blocks that are far apart from each other.

[0019] By adopting the above technical solution, the wavy groove design improves the friction when the abutment block connects with the hole in the wall.

[0020] Furthermore, the top of the abutting post is frustum-shaped, and the frustum-shaped sidewalls on the abutting post abut against the sidewalls of the two abutting blocks that are close to each other. The outer diameter of the frustum-shaped abutting post gradually increases from top to bottom.

[0021] By adopting the above technical solution, the frustum-shaped design reduces the friction between the clamping column and the clamping block when the clamping column rises.

[0022] In summary, this utility model has the following beneficial effects: In this application, by setting the fixing components, the cumbersome operation of the prior art is eliminated, and the installation efficiency of the alarm is improved. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0024] Figure 2 This is a cross-sectional structural schematic diagram of an embodiment of the present utility model;

[0025] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 Yes, yes Figure 2 Enlarged diagram of point B in the middle.

[0027] In the diagram: 1. Mounting plate; 2. Alarm body; 3. Dustproof assembly; 31. Dust cover; 32. Elastic plate; 33. Positioning plate; 34. Snap-fit ​​block; 35. Limiting ring plate; 4. Fixing assembly; 41. Positioning unit; 411. Clamping block; 412. Clamping column; 42. Lifting unit; 421. Threaded sleeve; 422. Annular rotating plate; 5. Limiting assembly; 51. Annular sleeve; 52. Limiting block; 53. Limiting through hole; 6. Stop block; 7. Assist rod. Detailed Implementation

[0028] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0029] like Figure 1-4 As shown in the illustration, this application discloses a smoke detector for fire protection, including a mounting plate 1, a detector body 2, a fixing component 4, a dustproof component 3, and a limiting component 5. The top of the mounting plate 1 has multiple through holes. The detector body 2 is located at the bottom of the mounting plate 1, and the fixing component 4 is mounted on the mounting plate 1. The number of fixing components 4 is equal to the number of through holes, and their positions correspond one-to-one. The fixing component 4 includes a positioning unit 41 and a lifting unit 42.

[0030] The positioning unit 41 includes a clamping block 411 and a clamping post 412. The clamping block 411 is fixed to the top of the mounting plate 1 near the mounting through hole. Two clamping blocks 411 are provided and are symmetrically arranged about the axis of the mounting through hole. The inner diameter of the two clamping blocks 411 gradually increases from top to bottom. The clamping post 412 is inserted into the mounting through hole. The lifting unit 42 is used to drive multiple clamping posts 412 to rise and fall synchronously. The lifting unit 42 includes a threaded sleeve 421 and an annular rotating plate 422. The threaded sleeve 421 is threadedly connected to the mounting plate 1. The annular rotating plate 422 is rotatably mounted on the inner wall of the threaded sleeve 421. The clamping post 412 is fixed to the top of the annular rotating plate 422.

[0031] During the installation of mounting plate 1, the two clamping blocks 411 of the same group are first inserted into the pre-drilled holes in the wall until mounting plate 1 is in contact with the wall surface. Then, the threaded sleeve 421 is rotated, which causes the annular rotating plate 422 connected to the threaded sleeve 421 and the clamping column 412 connected to the annular rotating plate 422 to rise. Since the inner diameter of the clamping block 411 gradually increases from top to bottom, the clamping column 412 squeezes the two clamping blocks 411 of the same group and causes the two clamping blocks 411 of the same group to deform in a direction away from each other until the clamping block 411 is in contact with the hole, thus completing the installation of mounting plate 1. This eliminates the cumbersome operation of existing technology and improves the installation efficiency of the alarm.

[0032] A dustproof assembly 3 is installed on the alarm body 2. The dustproof assembly 3 is used to block dust from entering the alarm body 2. Two sets of dustproof assemblies 3 are symmetrically arranged about the axis of the mounting plate 1. Each set of dustproof assemblies 3 includes a dust cover 31, an elastic plate 32, a positioning plate 33, a snap-fit ​​block 34, and a limiting ring plate 35. The dust cover 31 is inserted into the alarm body 2. Multiple ventilation holes are provided through the side wall of the dust cover 31. The elastic plate 32 is fixed to the side wall of the dust cover 31 and has a "Z" shape. The positioning plate 33 is fixed to the upper end of the elastic plate 32 and has an "L" shape. The snap-fit ​​block 34 is fixed to the side wall of the alarm body 2. The bottom of the horizontal section of the positioning plate 33 abuts against the top of the snap-fit ​​block 34. The limiting ring plate 35 is fixed to the inner side wall of the dust cover 31 and abuts against the bottom of the mounting plate 1.

[0033] Press the elastic plate 32 and deform it toward the axis of the alarm body 2. This causes the positioning plate 33 connected to the elastic plate 32 to move away from the locking block 34 until the positioning plate 33 separates from the locking block 34. At this point, pull down the dust cover 31 to separate the dust cover 31 from the alarm body 2 and clean the dust cover 31. This reduces the probability that the ventilation holes on the dust cover assembly 3 will be blocked, thus affecting the normal alarm operation of the alarm body 2.

[0034] The limiting component 5 is jointly disposed on the mounting plate 1 and the alarm body 2. The limiting component 5 includes an annular sleeve 51 and a limiting block 52. The annular sleeve 51 is fixed to the bottom of the mounting plate 1 and is inserted into the alarm body 2. The limiting block 52 is fixed to the side wall of the alarm body 2. An "L"-shaped limiting through hole 53 is provided through the side wall of the annular sleeve 51. The vertical section of the limiting through hole 53 extends to the lower end of the annular sleeve 51. The limiting block 52 is slidably connected to the horizontal section of the limiting through hole 53.

[0035] Rotate the alarm body 2 to drive the limit block 52 to rotate until the limit block 52 moves to the position of the vertical section of the limit through hole 53. At this time, pull the alarm body 2 downward to separate the mounting plate 1 and the alarm body 2, and then test or repair the alarm body 2 to ensure that the alarm body 2 can work normally.

[0036] Two sets of stops 6 are fixed to the top of the snap-fit ​​block 34. The side walls on both sides of the horizontal section of the positioning plate 33 abut against the side walls of the two sets of stops 6 that are close to each other. The setting of the stops 6 reduces the probability of the positioning plate 33 falling off the snap-fit ​​block 34.

[0037] An assist rod 7 is fixed on the side wall of the threaded sleeve 421 to facilitate the rotation of the threaded sleeve 421.

[0038] Both abutment blocks 411 have wavy grooves on their far-away sidewalls. The wavy grooves increase the friction when the abutment blocks 411 connect with the holes in the wall.

[0039] The top of the clamping post 412 is frustum-shaped, and the frustum-shaped sidewalls of the clamping post 412 abut against the sidewalls of the two clamping blocks 411 that are close to each other. The outer diameter of the frustum-shaped part of the clamping post 412 gradually increases from top to bottom. The frustum-shaped design reduces the friction between the clamping post 412 and the clamping blocks 411 when the clamping post 412 rises.

[0040] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A smoke detector for fire protection, comprising a mounting plate (1) and an alarm body (2) disposed at the bottom of the mounting plate (1), wherein the alarm body (2) is provided with a dustproof component (3) for blocking dust in the air entering the alarm body (2), and the top of the mounting plate (1) is provided with a plurality of mounting through holes, characterized in that: The mounting plate (1) is provided with a fixing component (4). The number of fixing components (4) is equal to the number of mounting through holes and their positions correspond one-to-one. The fixing component (4) includes a positioning unit (41). The positioning unit (41) includes a clamping block (411) fixed to the top of the mounting plate (1) near the mounting through hole and a clamping column (412) inserted into the mounting through hole. There are two clamping blocks (411) and they are symmetrically arranged about the axis of the mounting through hole. The inner diameter of the two clamping blocks (411) gradually increases from top to bottom. The fixing component (4) also includes a lifting unit (42) for driving multiple clamping columns (412) to rise and fall synchronously.

2. A fire-fighting smoke detector according to claim 1, characterized in that: The lifting unit (42) includes a threaded sleeve (421) threadedly connected to the mounting plate (1) and an annular rotating plate (422) rotatably mounted on the inner wall of the threaded sleeve (421). The abutting column (412) is fixed to the top of the annular rotating plate (422).

3. A fire-fighting smoke detector according to claim 1, characterized in that: The dustproof assembly (3) is provided in two sets and is symmetrically arranged about the axis of the mounting plate (1). Each set of the dustproof assembly (3) includes a dust cover (31) that is inserted and cooperates with the alarm body (2), an elastic plate (32) fixed on the side wall of the dust cover (31) and having a "Z" shaped structure, a positioning plate (33) fixed on the upper end of the elastic plate (32) and having an "L" shaped structure, and a snap-fit ​​block (34) fixed on the side wall of the alarm body (2). The bottom of the horizontal section of the positioning plate (33) abuts against the top of the snap-fit ​​block (34). Multiple ventilation holes are provided through the side wall of the dust cover (31). The dustproof assembly (3) also includes a limiting ring plate (35) fixed on the inner side wall of the dust cover (31) and abutting against the bottom of the mounting plate (1).

4. A fire-fighting smoke detector according to claim 1, characterized in that: The mounting plate (1) and the alarm body (2) are jointly provided with a limiting component (5). The limiting component (5) includes an annular sleeve (51) fixed to the bottom of the mounting plate (1) and inserted into the alarm body (2), and a limiting block (52) fixed to the side wall of the alarm body (2). The side wall of the annular sleeve (51) is provided with a limiting through hole (53) with an "L" shape. The vertical section of the limiting through hole (53) extends to the lower end of the annular sleeve (51). The limiting block (52) is slidably connected to the horizontal section of the limiting through hole (53).

5. A fire-fighting smoke detector according to claim 3, characterized in that: The top of the snap-fit ​​block (34) is fixed with two sets of stops (6), and the side walls on both sides of the horizontal section of the positioning plate (33) abut against the side walls of the two sets of stops (6) that are close to each other.

6. A fire-fighting smoke detector according to claim 2, characterized in that: An assist rod (7) is fixed on the side wall of the threaded sleeve (421).

7. A fire-fighting smoke detector according to claim 1, characterized in that: Both of the two abutting blocks (411) have wavy grooves on their sidewalls that are far apart from each other.

8. A smoke detector for fire protection according to claim 1, characterized in that: The top of the clamping post (412) is frustum-shaped, and the frustum-shaped sidewalls on the clamping post (412) abut against the sidewalls of the two clamping blocks (411) that are close to each other. The outer diameter of the frustum-shaped part on the clamping post (412) gradually increases from top to bottom.

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