Smoke detector for safety production

By designing guide blocks, guide grooves, limit rods and other structures in the smoke detector, the rapid installation and disassembly of the lower case and the upper case is solved, and the problem of inconvenient installation of dustproof components and smoke detector bodies in the prior art is improved, and the convenience of equipment maintenance and maintenance is improved.

CN222927092UActive Publication Date: 2025-05-30NINGBO HI-TECH PARK JABO ELECTRONICS CO LTD
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Patent Information

Application Number
CN202421893004.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-07
Publication Date
2025-05-30
Estimated Expiration
2034-08-07

AI Technical Summary

Technical Problem

The existing smoke detector has not designed a quick installation structure for dustproof components, which is not convenient for disassembly, cleaning and replacement, and the quick installation structure of the smoke detector body has not been designed, which affects maintenance and maintenance.

Method used

The design includes a mounting seat and housing with a structure such as guide block, guide groove, limiting rod, through-hole, etc., to achieve rapid installation and disassembly of the lower case and the upper case, and to facilitate maintenance and cleaning through the design of locking components and dust-proof components.

Benefits of technology

It realizes the rapid installation and disassembly of smoke detectors, which is easy to repair and maintenance, and improves the practicality and detection efficiency of the equipment.

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Abstract

The utility model relates to the technical field of smoke detectors, and discloses a smoke detector for safety production, which comprises a mounting seat, a guide groove is formed in the top of the mounting seat, a first through hole is formed in the outer side of the mounting seat, a lower shell is arranged at the top of the mounting seat, a guide block is fixedly mounted at the bottom of the lower shell, and a second through hole is formed in the outer side of the guide block. A second through hole is formed in the outer side of the guide block, a first limiting rod is arranged on the outer side of the mounting base, a first groove and a second groove are formed in the outer side of the lower shell, and a detection assembly is fixedly installed in the lower shell. According to the smoke detector for safety production, through the design of a positioning block, a positioning groove, a third limiting rod, a third through hole and a fourth through hole, mounting and dismounting of a second metal net and a first metal net are facilitated, subsequent cleaning and replacement of the second metal net and the first metal net are facilitated, and through the design of the second metal net and the first metal net, dust can be prevented from being accumulated in the upper shell; and normal use of the detection assembly is influenced.
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Description

Technical Field

[0001] The utility model relates to the technical field of smoke detectors, and specifically relates to a smoke detector for safe production. Background Art

[0002] Smoke detectors, also known as smoke sensors or smoke alarm devices, achieve their functions by monitoring the concentration of smoke. They are widely used in various fire alarm systems and have better performance than gas-sensitive resistor-based fire alarms. The main function of smoke detectors is to trigger an alarm and send a signal when smoke is detected, so that timely measures can be taken. During safe production, smoke detectors are needed to prevent the occurrence or spread of fires.

[0003] Chinese Utility Model Patent Publication No.: CN 220455928 U, discloses: a smoke detector for safe production. In this smoke detector for safe production, the middle part of the air outlet hole is curved. When the air outlet hole drives the gas to be discharged, it prevents dust from passing through the inside of the air outlet hole. And a first protective plate is arranged outside the air outlet hole, and the first protective plate is located at the upper end and the lower end outside the air outlet hole. That is, the first protective plate effectively protects the outside of the air outlet hole. However, this smoke detector for safe production does not design a quick installation structure for the dust-proof component, which is not convenient for disassembling, cleaning and replacing the dust-proof component. After long-term use, dust accumulates on the surface of the dust-proof component, affecting the normal use of the smoke detector. Moreover, this smoke detector for safe production does not design a quick installation structure for the smoke detector body. After long-term use, it is not convenient to repair and maintain the inside of the smoke detector body, affecting the normal use of the smoke detector, and its practicability is poor. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a smoke detector for safe production, which can effectively solve the problems in the prior art that there is no designed quick installation structure for the dust-proof component, it is not convenient to disassemble, clean and replace the dust-proof component, after long-term use, dust accumulates on the surface of the dust-proof component, affecting the normal use of the smoke detector, there is no designed quick installation structure for the smoke detector body, after long-term use, it is not convenient to repair and maintain the inside of the smoke detector body, affecting the normal use of the smoke detector, and its practicability is poor.

[0005] The technical solution adopted by the utility model is as follows: A smoke detector for safe production, including a mounting base. A guiding groove is opened at the top of the mounting base, and a through hole one is opened on the outer side of the mounting base. A lower housing is arranged at the top of the mounting base. A guiding block is fixedly installed at the bottom of the lower housing, and a through hole two is opened on the outer side of the guiding block. A limiting rod one is arranged on the outer side of the mounting base. A groove one and a groove two are opened on the outer side of the lower housing. A detection component is fixedly installed inside the lower housing. An upper housing is arranged at the top of the lower housing. An installation groove is opened on the outer side of the upper housing, and a locking component is arranged inside the installation groove. A dust-proof component is arranged on the outer side of the upper housing. A diversion component is fixedly installed at the top inside the upper housing.

[0006] Preferably, the mounting base and the lower housing are installed by plugging, and the limiting rod one penetrates through the through hole one and the through hole two.

[0007] Through the above technical solution, the staff inserts the guiding block into the inside of the guiding groove, and then penetrates the limiting rod one through the through hole one and the through hole two, which can realize the quick installation of the lower housing. Through the design of the guiding block, the guiding groove, the limiting rod one, the through hole one and the through hole two, it is convenient for the installation and disassembly of the lower housing, and is convenient for subsequent maintenance and repair.

[0008] Preferably, a knob is slidably connected inside the installation groove. A spring is fixedly installed at the bottom of the knob, and a limiting rod two is fixedly installed at the bottom of the knob. The diameter of the upper edge of the installation groove is smaller than the diameter of the knob.

[0009] Through the above technical solution, the staff presses down the knob, the spring is squeezed by force, and then rotates the knob. When the limiting rod two is located below the groove two, stop pressing the knob, and the spring rebounds to pull the limiting rod two into the inside of the groove two, which can realize the locking of the lower housing and the upper housing. Through the design of the locking component, it is convenient to fix the lower housing and the upper housing, and is convenient for subsequent maintenance and repair.

[0010] Preferably, there are a plurality of the same locking components, and the plurality of locking components are symmetrically distributed about the center line of the upper housing.

[0011] Through the above technical solution, through the design of a plurality of locking components, when installing the upper housing, the installation stability is higher, and it is more firm after installation, avoiding damage caused by a single locking component being unable to bear when subjected to a large stress, affecting the normal use of the smoke detector.

[0012] Preferably, the dust-proof component includes a first metal mesh, a positioning block, a third through hole, a second metal mesh, a positioning groove, a fourth through hole, and a third limiting rod. A positioning block is fixedly installed on the outer side of the first metal mesh. A third through hole is formed in the outer side of the positioning block. A second metal mesh is arranged on the outer side of the first metal mesh. A positioning groove and a fourth through hole are formed in the outer side of the second metal mesh. A third limiting rod is arranged on the outer side of the second metal mesh. The first metal mesh and the second metal mesh are installed by inserting. The third limiting rod passes through the third through hole and the fourth through hole.

[0013] Through the above technical solution, the staff inserts the positioning block into the inner part of the positioning groove, and then passes the third limiting rod through the third through hole and the fourth through hole, which can realize the rapid installation of the second metal mesh and the first metal mesh. Through the design of the positioning block, the positioning groove, the third limiting rod, the third through hole and the fourth through hole, it is convenient for the installation and disassembly of the second metal mesh and the first metal mesh, which is convenient for the subsequent cleaning and replacement of the second metal mesh and the first metal mesh. Through the design of the second metal mesh and the first metal mesh, it can prevent dust from accumulating inside the upper shell and affecting the normal use of the detection component.

[0014] Preferably, the diversion component includes a motor, a rotating shaft, a limiting block, a first threaded hole, a blade, a second threaded hole and a bolt. The output end of the motor is fixedly installed with a rotating shaft. A limiting block is fixedly installed on the outer side of the rotating shaft. A first threaded hole and a blade are formed in the outer side of the rotating shaft. A second threaded hole is formed in the outer side of the blade. The blade is threadedly connected with a bolt on the outer side.

[0015] Through the above technical solution, the staff starts the motor. The output shaft of the motor rotates to drive the rotating shaft to rotate. The rotating shaft rotates to drive the blade to rotate. When a fire occurs, the outside smoke is timely transported to the detection component, thereby improving the detection efficiency, timely sending out an alarm prompt, and facilitating the timely evacuation of personnel, with relatively high practicability.

[0016] Preferably, the blade is slidably connected with the rotating shaft. The bolt passes through the second threaded hole and extends into the inner part of the first threaded hole. The limiting block is located at the top of the blade.

[0017] Through the above technical solution, the staff inserts the rotating shaft into the inner part of the blade, and then passes the bolt through the second threaded hole and extends into the inner part of the first threaded hole, which can realize the rapid installation of the blade. Through the design of the limiting block, the rapid positioning of the blade can be realized. Through the design of the bolt, the second threaded hole and the first threaded hole, it is convenient for the installation and disassembly of the blade, which is convenient for subsequent maintenance and repair.

[0018] Compared with the prior art, the utility model provides a smoke detector for safe production, which has the following beneficial effects:

[0019] 1. The smoke detector for work safety is designed with guide blocks, guide grooves, the first limiting rod, the first through hole, and the second through hole, which facilitates the installation and disassembly of the lower housing. Combined with the design of the locking component, it is convenient to fix the lower housing and the upper housing, facilitating the installation and disassembly of the overall smoke detector, and convenient for subsequent maintenance and repair of the smoke detector. Through the design of the diversion component, when a fire occurs, the external flue gas is timely transported to the detection component, thereby improving the detection efficiency, promptly sending out an alarm prompt, facilitating the timely evacuation of personnel, and having high practicability.

[0020] 2. The smoke detector for work safety is designed with positioning blocks, positioning grooves, the third limiting rod, the third through hole, and the fourth through hole, which facilitates the installation and disassembly of the second metal mesh and the first metal mesh, and is convenient for subsequent cleaning and replacement of the second metal mesh and the first metal mesh. Through the design of the second metal mesh and the first metal mesh, it can prevent dust from accumulating inside the upper housing and affecting the normal use of the detection component. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0022] Figure 2 is a structural schematic diagram of the installation of the lower housing of the present utility model;

[0023] Figure 3 is a structural schematic diagram of the installation of the upper housing of the present utility model;

[0024] Figure 4 is a semi-sectional structural schematic diagram of the present utility model;

[0025] Figure 5 is the present utility model Figure 4 the enlarged structural schematic diagram at A in;

[0026] Figure 6 is a structural schematic diagram of the installation of the dust-proof component of the present utility model;

[0027] Figure 7 is a structural schematic diagram of the installation of the diversion component of the present utility model;

[0028] Figure 8 is a three-dimensional structural schematic diagram of the mounting seat of the present utility model.

[0029] Wherein: 1. Mounting base; 2. Guide groove; 3. First through hole; 4. Lower housing; 5. Guide block; 6. Second through hole; 7. First limiting rod; 8. First groove; 9. Second groove; 10. Detection assembly; 11. Upper housing; 12. Mounting groove; 13. Locking assembly; 1301. Knob; 1302. Spring; 1303. Second limiting rod; 14. Dust-proof assembly; 1401. First metal mesh; 1402. Positioning block; 1403. Third through hole; 1404. Second metal mesh; 1405. Positioning groove; 1406. Fourth through hole; 1407. Third limiting rod; 15. Flow guiding assembly; 1501. Motor; 1502. Rotating shaft; 1503. Limiting block; 1504. First threaded hole; 1505. Blade; 1506. Second threaded hole; 1507. Bolt. Detailed implementation manner

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Embodiment 1: As Figure 1-8 shown, a smoke detector for safe production provided by the present invention includes a mounting base 1. A guide groove 2 is opened at the top of the mounting base 1. A first through hole 3 is opened on the outside of the mounting base 1. A lower housing 4 is arranged on the top of the mounting base 1. A guide block 5 is fixedly installed at the bottom of the lower housing 4. A second through hole 6 is opened on the outside of the guide block 5. A first limiting rod 7 is arranged on the outside of the mounting base 1. A first groove 8 and a second groove 9 are opened on the outside of the lower housing 4. A detection assembly 10 is fixedly installed inside the lower housing 4. An upper housing 11 is arranged on the top of the lower housing 4. A mounting groove 12 is opened on the outside of the upper housing 11. A locking assembly 13 is arranged inside the mounting groove 12. A dust-proof assembly 14 is arranged on the outside of the upper housing 11. A flow guiding assembly 15 is fixedly installed at the top inside the upper housing 11.

[0032] Specifically, the mounting base 1 and the lower housing 4 are installed by plugging. The first limiting rod 7 passes through the first through hole 3 and the second through hole 6. The advantage is that the staff inserts the guide block 5 into the inside of the guide groove 2 and then passes the first limiting rod 7 through the first through hole 3 and the second through hole 6, which can realize the quick installation of the lower housing 4. Through the design of the guide block 5, the guide groove 2, the first limiting rod 7, the first through hole 3 and the second through hole 6, it is convenient for the installation and disassembly of the lower housing 4, facilitating subsequent maintenance and repair.

[0033] Specifically, the locking assembly 13 includes a knob 1301, a spring 1302, and a second limiting rod 1303. The knob 1301 is slidably connected to the inside of the installation groove 12. The spring 1302 is fixedly installed at the bottom of the knob 1301. The second limiting rod 1303 is fixedly installed at the bottom of the knob 1301. The diameter of the upper edge of the installation groove 12 is smaller than the diameter of the knob 1301. The advantage is that when the staff presses down the knob 1301, the spring 1302 is squeezed. Then, when the knob 1301 is rotated and the second limiting rod 1303 is located below the second groove 9, the pressing of the knob 1301 is stopped, and the spring 1302 rebounds, pulling the second limiting rod 1303 into the inside of the second groove 9, which can lock the lower housing 4 and the upper housing 11. Through the design of the locking assembly 13, it is convenient to fix the lower housing 4 and the upper housing 11, facilitating subsequent maintenance and repair.

[0034] Specifically, multiple identical locking assemblies 13 are provided, and the multiple locking assemblies 13 are symmetrically distributed about the center line of the upper housing 11. The advantage is that through the design of the multiple locking assemblies 13, when installing the upper housing 11, the installation stability is higher, and it is more firmly installed after installation. When subjected to a large stress, it can avoid the single locking assembly 13 being damaged and unable to bear, affecting the normal use of the smoke detector.

[0035] Embodiment 2: As Figure 2-8 shown, as an improvement to the previous embodiment.

[0036] Specifically, the dust-proof assembly 14 includes a first metal mesh 1401, a positioning block 1402, a third through hole 1403, a second metal mesh 1404, a positioning groove 1405, a fourth through hole 1406, and a third limiting rod 1407. The positioning block 1402 is fixedly installed on the outer side of the first metal mesh 1401. The third through hole 1403 is opened on the outer side of the positioning block 1402. The second metal mesh 1404 is arranged on the outer side of the first metal mesh 1401. The positioning groove 1405 and the fourth through hole 1406 are opened on the outer side of the second metal mesh 1404. The third limiting rod 1407 is arranged on the outer side of the second metal mesh 1404. The first metal mesh 1401 and the second metal mesh 1404 are installed by plugging, and the third limiting rod 1407 passes through the third through hole 1403 and the fourth through hole 1406. The advantage is that when the staff inserts the positioning block 1402 into the inside of the positioning groove 1405 and then passes the third limiting rod 1407 through the third through hole 1403 and the fourth through hole 1406, the rapid installation of the second metal mesh 1404 and the first metal mesh 1401 can be realized. Through the design of the positioning block 1402, the positioning groove 1405, the third limiting rod 1407, the third through hole 1403, and the fourth through hole 1406, it is convenient for the installation and disassembly of the second metal mesh 1404 and the first metal mesh 1401, facilitating the subsequent cleaning and replacement of the second metal mesh 1404 and the first metal mesh 1401. Through the design of the second metal mesh 1404 and the first metal mesh 1401, it can prevent dust from accumulating inside the upper housing 11 and affecting the normal use of the detection assembly 10.

[0037] Specifically, the diversion component 15 includes a motor 1501, a rotating shaft 1502, a limiting block 1503, a first threaded hole 1504, blades 1505, a second threaded hole 1506, and bolts 1507. The output end of the motor 1501 is fixedly installed with the rotating shaft 1502. The outer side of the rotating shaft 1502 is fixedly installed with the limiting block 1503. The outer side of the rotating shaft 1502 is provided with the first threaded hole 1504 and the blades 1505. The outer side of the blades 1505 is provided with the second threaded hole 1506. The outer side of the blades 1505 is threadedly connected with the bolts 1507. The advantage is that when the staff starts the motor 1501, the output shaft of the motor 1501 rotates to drive the rotating shaft 1502 to rotate, and the rotating shaft 1502 rotates to drive the blades 1505 to rotate. When a fire occurs, the external smoke is timely transported to the detection component 10, thereby improving the detection efficiency, timely sending out an alarm prompt, facilitating the timely evacuation of personnel, and having relatively high practicability.

[0038] Specifically, the blades 1505 are slidably connected to the rotating shaft 1502. The bolts 1507 penetrate through the second threaded hole 1506 and extend into the interior of the first threaded hole 1504. The limiting block 1503 is located at the top of the blades 1505. The advantage is that when the staff inserts the rotating shaft 1502 into the interior of the blades 1505 and then the bolts 1507 penetrate through the second threaded hole 1506 and extend into the interior of the first threaded hole 1504, the rapid installation of the blades 1505 can be realized. Through the design of the limiting block 1503, the rapid positioning of the blades 1505 can be realized. Through the design of the bolts 1507, the second threaded hole 1506, and the first threaded hole 1504, the installation and disassembly of the blades 1505 are facilitated, which is convenient for subsequent maintenance and repair.

[0039] Working principle: During installation, the staff inserts the guiding block 5 into the inside of the guiding groove 2, and then passes the first limiting rod 7 through the first through hole 3 and the second through hole 6, which can realize the rapid installation of the lower housing 4. Through the design of the guiding block 5, the guiding groove 2, the first limiting rod 7, the first through hole 3 and the second through hole 6, it is convenient for the installation and disassembly of the lower housing 4, facilitating subsequent maintenance and repair. The staff presses down the knob 1301, and the spring 1302 is squeezed by the force. Then, the knob 1301 is rotated. When the second limiting rod 1303 is located below the second groove 9, stop pressing the knob 1301. The spring 1302 rebounds and pulls the second limiting rod 1303 into the inside of the second groove 9, which can realize the locking of the lower housing 4 and the upper housing 11. Through the design of the locking assembly 13, it is convenient to fix the lower housing 4 and the upper housing 11, facilitating subsequent maintenance and repair. Through multiple locking assemblies 13, the whole is made more firm and stable. The staff inserts the positioning block 1402 into the inside of the positioning groove 1405, and then passes the third limiting rod 1407 through the third through hole 1403 and the fourth through hole 1406, which can realize the rapid installation of the second metal mesh 1404 and the first metal mesh 1401. Through the design of the positioning block 1402, the positioning groove 1405, the third limiting rod 1407, the third through hole 1403 and the fourth through hole 1406, it is convenient for the installation and disassembly of the second metal mesh 1404 and the first metal mesh 1401, facilitating subsequent cleaning and replacement of the second metal mesh 1404 and the first metal mesh 1401. Through the design of the second metal mesh 1404 and the first metal mesh 1401, it can prevent dust from accumulating inside the upper housing 11 and affecting the normal use of the detection component 10. The staff inserts the rotating shaft 1502 into the inside of the blade 1505, and then passes the bolt 1507 through the second threaded hole 1506 and extends it into the inside of the first threaded hole 1504, which can realize the rapid installation of the blade 1505. Through the design of the limiting block 1503, the rapid positioning of the blade 1505 can be realized. Through the design of the bolt 1507, the second threaded hole 1506 and the first threaded hole 1504, it is convenient for the installation and disassembly of the blade 1505, facilitating subsequent maintenance and repair. During use, the staff first connects to the external power supply and then starts the motor 1501. The output shaft of the motor 1501 rotates to drive the rotating shaft 1502 to rotate, and the rotating shaft 1502 rotates to drive the blade 1505 to rotate. When a fire occurs, the external smoke is timely conveyed to the detection component 10, thereby improving the detection efficiency and timely giving an alarm prompt, facilitating the timely evacuation of personnel, and having high practicability.

[0040] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A smoke detector for production safety, comprising a mounting base (1), characterized in that: A guide groove (2) is provided at the top of the mounting seat (1), a through hole (1) is provided at the outer side of the mounting seat (1), a lower shell (4) is provided at the top of the mounting seat (1), a guide block (5) is fixedly installed at the bottom of the lower shell (4), a through hole (2) is provided at the outer side of the guide block (5), a limit rod (1) is provided at the outer side of the mounting seat (1), a groove (1) (8) and a groove (2) (9) are provided at the outer side of the lower shell (4), a detection component (10) is fixedly installed inside the lower shell (4), an upper shell (11) is provided at the top of the lower shell (4), a mounting groove (12) is provided at the outer side of the upper shell (11), a locking component (13) is provided inside the mounting groove (12), a dustproof component (14) is provided at the outer side of the upper shell (11), and a flow guide component (15) is fixedly installed at the top inside the upper shell (11).

2. A smoke detector for production safety according to claim 1, characterized in that: The mounting seat (1) and the lower shell (4) are plug-connected and installed, and the limiting rod 1 (7) passes through the through hole 1 (3) and the through hole 2 (6).

3. A smoke detector for production safety according to claim 2, characterized in that: The locking assembly (13) comprises a knob (1301), a spring (1302) and a second limiting rod (1303); the knob (1301) is slidably connected inside the mounting groove (12); the spring (1302) is fixedly mounted on the bottom of the knob (1301); the second limiting rod (1303) is fixedly mounted on the bottom of the knob (1301); and the diameter of the upper edge of the mounting groove (12) is smaller than the diameter of the knob (1301).

4. A smoke detector for production safety according to claim 3, characterized in that: The locking components (13) are provided in a plurality, and the plurality of locking components (13) are symmetrically distributed about the center line of the upper shell (11).

5. A smoke detector for production safety according to claim 4, characterized in that: The dustproof component (14) comprises a metal mesh 1 (1401), a positioning block (1402), a through hole 3 (1403), a metal mesh 2 (1404), a positioning slot (1405), a through hole 4 (1406) and a limiting rod 3 (1407), wherein the positioning block (1402) is fixedly mounted on the outer side of the metal mesh 1 (1401), the through hole 3 (1403) is opened on the outer side of the positioning block (1402), and the metal mesh 1 (1401) is provided with a plurality of through holes (1403). A metal mesh 2 (1404) is arranged on the outer side of the metal mesh 2 (1404), a positioning groove (1405) and a through hole 4 (1406) are opened on the outer side of the metal mesh 2 (1404), a limiting rod 3 (1407) is arranged on the outer side of the metal mesh 2 (1404), the metal mesh 1 (1401) and the metal mesh 2 (1404) are plug-in installed, and the limiting rod 3 (1407) passes through the through hole 3 (1403) and the through hole 4 (1406).

6. A smoke detector for production safety according to claim 5, characterized in that: The flow guide component (15) comprises a motor (1501), a rotating shaft (1502), a limit block (1503), a threaded hole 1 (1504), a blade (1505), a threaded hole 2 (1506) and a bolt (1507); the rotating shaft (1502) is fixedly mounted on the output end of the motor (1501); the limit block (1503) is fixedly mounted on the outer side of the rotating shaft (1502); the threaded hole 1 (1504) and the blade (1505) are provided on the outer side of the rotating shaft (1502); the threaded hole 2 (1506) is provided on the outer side of the blade (1505); and the bolt (1507) is threadedly connected to the outer side of the blade (1505).

7. A smoke detector for production safety according to claim 6, characterized in that: The blade (1505) is slidably connected to the rotating shaft (1502), the bolt (1507) passes through the second threaded hole (1506) and extends to the inside of the first threaded hole (1504), and the limit block (1503) is located at the top of the blade (1505).

Citation Information

Patent Citations

  • Smoke detector for safety production

    CN220455928U