Safety early warning helmet
By integrating a detection unit and a buzzer into the safety helmet, and using magnetic induction and pressure sensors to detect the connection status of the seat belt buckle, the problem of limited functionality and operator misconduct in existing helmets has been solved, thereby improving the safety and accuracy of high-altitude operations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-28
- Publication Date
- 2026-04-14
AI Technical Summary
Existing safety helmets have limited functionality and cannot detect or respond to safety risks to workers at heights other than head impacts. Furthermore, workers may fail to secure their safety belt buckles to the anchor points due to wishful thinking, leading to safety hazards.
A safety warning helmet was designed with a built-in detection unit and buzzer. It detects whether the seat belt buckle D is connected to the anchor point through a magnetic induction element and a pressure sensor, and alarms when it is not connected. The combination of ratchet and pawl mechanism and electric push rod ensures the accuracy and reliability of detection, and provides instant feedback using Hall sensor and dual-color LED indicator.
It effectively eliminates the false safety situation where workers fail to secure their safety belts to the anchor point, improving the inherent safety level of high-altitude operations. Real-time monitoring and immediate feedback enhance safety and accuracy.
Smart Images
Figure CN121845323A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of safety equipment technology, and specifically relates to a safety warning helmet. Background Technology
[0002] Working at heights is an indispensable part of modern engineering construction and equipment maintenance. The working environment is complex and extremely dangerous, with falls being the most serious type of accident. Wearing a safety harness and reliably securing the buckle to a stable anchor point is recognized as the most basic and crucial safety measure to ensure the safety of workers. However, in actual operations, the proper use of safety harnesses can affect the ease of movement for workers. Some individuals, due to convenience or a sense of impunity, may fail to fasten the harness (i.e., the buckle is not connected to the anchor point), which is a serious violation. This human-caused safety hazard cannot be completely eliminated by safety education and on-site supervision alone, and has become a pressing problem in the management of safety for working at heights. The safety helmets commonly worn by workers at heights primarily protect the head from physical injuries such as falling objects and collisions.
[0003] Traditional safety helmets typically consist of a hard outer shell, and some helmets also have accessory mounting slots or buckles for attaching auxiliary equipment such as headlamps and ear protection to adapt to different work environment requirements; however, the function of existing safety helmets is always limited to passive physical protection. They exist only as independent protective equipment with a single function and cannot detect or respond to safety risks to workers other than head impacts. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to provide a safety warning helmet that is simple in structure, reasonable in design and highly practical, in order to address the shortcomings of the prior art.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a safety warning helmet for detecting whether the D-buckle of a high-altitude work safety belt is connected to an anchor point, wherein the D-buckle is provided with a magnetic induction element, characterized in that the safety warning helmet comprises: Helmet shell; The detection unit includes a mounting box, a winding wheel, a tension strap, a guide wheel, a pressure sensor, and a controller. The mounting box is located on the rear side of the helmet shell. The winding wheel is rotatably mounted inside the mounting box. The tension strap is wound around the winding wheel. The guide wheel is located inside the mounting box and on one side of the winding wheel. A pressure sensor is also mounted on the guide wheel. The movable end of the tension strap passes over the guide wheel and is used to connect to the D-buckle of the high-altitude work safety belt. The pressure sensor is connected to the controller. The tension strap is connected to the D-buckle of the high-altitude work safety belt and can apply pressure to the pressure sensor when it is tightened. The buzzer is located on one side of the helmet shell and connected to the controller. In operation, when the pressure sensor detects that the tension band is not taut, it will activate the buzzer to sound an alarm.
[0006] Preferably, the winding wheel rotates within the mounting box via a first rotating shaft. One end of the winding wheel is equipped with a ratchet, and a pawl is rotatably mounted on the end face of the ratchet. The mounting box also contains a pawl seat, on which a guide pawl that can engage with the pawl is slidably mounted. A guide rod is mounted on the guide pawl, and a pawl is rotatably mounted on the pawl seat. A guide groove is provided on the pawl, and the guide rod is movably connected to the guide groove. When the tension belt drives the winding wheel to rotate, the pawl rotates outward. After the pawl engages with the guide pawl, it drives the guide pawl to slide, thereby causing the guide rod to slide within the guide groove and causing the pawl to rotate to the position where it engages with the ratchet.
[0007] Preferably, a reset rod is provided on the pawl, with the end of the reset rod away from the pawl extending through the side wall of the mounting box, and a handle is provided on the outer end of the reset rod.
[0008] Preferably, a spiral spring is provided between the first rotating shaft and the winding wheel, with both ends of the spiral spring fixedly connected to the outer wall of the first rotating shaft and the inner wall of the winding wheel, respectively.
[0009] Preferably, the movable end of the tensioning strap is provided with a safety hook for connecting with the D-buckle of the high-altitude work safety belt.
[0010] Preferably, the safety hook is provided with a sensing unit that can couple with the magnetic induction element on the D buckle, and the sensing unit is connected to the controller.
[0011] Preferably, the sensing unit is a Hall sensor, which is located inside the opening of the safety hook.
[0012] Preferably, an electric push rod is also provided on the end face of the ratchet. The telescopic end of the electric push rod is connected to the actuating pawl, and the electric push rod is connected to the controller. When the electric push rod extends, it can push the actuating pawl outward.
[0013] Preferably, a dual-color LED indicator is provided on one side of the helmet shell, and the dual-color LED indicator is connected to the controller.
[0014] Preferably, a rotary encoder for detecting the number of rotations of the winding wheel is provided on the first rotating shaft, and the rotary encoder is connected to the controller.
[0015] Compared with the prior art, the present invention has the following advantages: This invention provides a safety warning helmet that can determine whether the D-buckle of the safety belt for high-altitude operations is fixed to the anchor point by judging the pressure detected by the pressure sensor. If the D-buckle is not fixed, the controller will issue an alarm signal through a buzzer. This design elevates the detection of connection to the confirmation of effective anchoring, fundamentally eliminating the false safety state of workers wearing full-body safety belts but forgetting to fasten the D-buckle into the anchor point, thereby greatly improving the intrinsic safety level of high-altitude operations. This invention discloses a safety warning helmet. During actual operation, when the operator fixes the tension strap and D-buckle to the anchor point, the ratchet and pawl mechanism mentioned above can lock the winding wheel. At this time, the position of the winding wheel is fixed and it can no longer rotate. The tension strap is in a fixed tension state, so the pressure of the tension strap on the pressure sensor remains constant. This design avoids the continuous fluctuation of the pressure sensor reading due to factors such as the movement of the operator during operation. After tensioning, the pressure value detected by the sensor is stable, thus improving the accuracy and reliability of the detection unit. This invention provides a safety warning helmet that, by introducing an electric push rod, solves the problem of traditional designs that rely solely on centrifugal force to eject the pawl, which may fail to eject properly. This is because the pawl may fail to eject due to insufficient centrifugal force after the safety buckle is connected, potentially leading to engagement failure. In this embodiment, the electric push rod provides a defined mechanical force to forcibly trigger the interlocking locking action, thus eliminating the safety hazard caused by mechanical failure. This ensures that after the safety buckle and D-buckle are confirmed to be securely connected, the ratchet and pawl can maintain engagement, thereby improving the accuracy and reliability of the detection unit.
[0016] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural diagram of a safety warning helmet according to the present invention; Figure 2 This is a schematic diagram of the rear structure of a safety warning helmet according to the present invention; Figure 3 This is a schematic diagram of another rear structure of a safety warning helmet according to the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the side and rear structure of a safety warning helmet according to the present invention; Figure 6 for Figure 5 Enlarged view of section B in the middle.
[0018] Explanation of reference numerals in the attached figures: 1. Helmet shell; 2. Mounting box; 3. Winding reel; 4. Guide wheel; 5. Pressure sensor; 6. Tensioner strap; 7. First pivot; 8. Ratchet; 9. Pawl seat; 10. Pawl; 11. Actuating pawl; 12. Guide pawl; 13. Guide rod; 14. Guide groove; 15. Safety hook; 16. Dual-color LED indicator; 17. Second pivot; 18. Reset rod; 19. Handle; 20. Slide groove; 21. Electric push rod. Detailed Implementation
[0019] like Figure 1 , Figure 2 , Figure 3 As shown, this invention discloses a safety warning helmet for detecting whether the D-buckle of a safety belt for high-altitude operations is connected to an anchor point. The helmet includes a helmet shell 1, a detection unit mounted on the helmet shell 1, and a buzzer. Specifically, the detection unit includes a mounting box 2, a winding wheel 3, a tension strap 6, a guide wheel 4, a pressure sensor 5, and a controller. The mounting box 2 is located on the rear side of the helmet shell 1. The winding wheel 3 is rotatably mounted inside the mounting box 2. The tension strap 6 is wound around the winding wheel 3. The guide wheel 4 is located inside the mounting box 2 and on one side of the winding wheel 3. The guide wheel 4 is also equipped with a pressure sensor 5. The tension strap 6... The movable end connects to the D-buckle of the high-altitude work safety belt after passing over the guide wheel 4, and the tensioning strap 6 can contact the pressure sensor 5 set on the guide wheel 4 when passing over the guide wheel 4. The pressure sensor 5 is connected to the controller. The tensioning strap 6 is connected to the D-buckle of the high-altitude work safety belt and can apply pressure to the pressure sensor 5 when it is tightened. The buzzer is set on one side of the helmet shell 1 and connected to the controller. In the working state, when the pressure sensor 5 detects that the tensioning strap 6 is not in a tightened state, the buzzer is controlled to sound an alarm. The controller is configured to compare the real-time detected pressure data with the pressure threshold set inside the controller.
[0020] In practical use during high-altitude operations, the worker puts on a high-altitude work safety belt and the safety warning helmet on the ground. After putting it on, the worker pulls the D-buckle on the high-altitude work safety belt and connects the D-buckle to the end of the tensioned strap 6 on the helmet. At this time, since the D-buckle is not fixed, both the D-buckle and the tensioned strap 6 are in a swaying state. After reaching the height, the worker needs to pull the D-buckle and the tensioned strap 6 and fix the D-buckle to a certain anchor point. During the process of pulling and fixing the D-buckle, the tensioned strap 6 is in a taut state. At this time, the tensioned strap 6 can exert pressure on the pressure sensor 5 set on the guide wheel 4. If the D-buckle is not fixed to the anchor point, the tensioned strap 6 connected to the D-buckle will sway with the D-buckle. This swaying will prevent the tensioned strap 6 from maintaining a stable tension state, causing the pressure sensor 5 to only detect a very small and unstable pressure. This indicates that high-temperature work is about to begin or has already begun. If a worker enters a high-altitude work area but fails to secure the D-buckle to the anchor point, the controller will activate the buzzer to sound an alarm. When the tension strap 6 is connected to the D-buckle and secured to the anchor point, it exerts a stable and significant pressure on the pressure sensor. If the pressure sensor detects a stable pressure value exceeding a threshold, it indicates that the D-buckle is secured to the anchor point, and the buzzer will stop sounding. In summary, this safety helmet determines whether the D-buckle of the high-altitude work safety belt is secured to the anchor point by judging the pressure detected by the pressure sensor 5. If the D-buckle is not secured, the controller will sound an alarm signal via the buzzer. This design, through real-time monitoring of the pressure sensor's force state via the tension strap 6, confirms a valid force connection, preventing the false safety situation where workers wear a full-body safety belt but forget to fasten the D-buckle to the anchor point, thus improving the inherent safety level of high-altitude work.
[0021] Furthermore, in order to ensure that the tension band 6 is connected to the D-buckle and that the pressure on the pressure sensor remains constant after tensioning, such as... Figure 4As shown, in this embodiment, the winding wheel 3 rotates within the mounting box 2 via the first rotating shaft 7. A ratchet 8 is provided at one end of the winding wheel 3, and a pawl 11 is rotatably provided on the end face of the ratchet 8. A pawl seat 9 is also provided inside the mounting box 2. A guide pawl 12 that can engage with the pawl 11 is slidably provided on the pawl seat 9. A guide rod 13 is provided on the guide pawl 12. A pawl 10 is rotatably provided on the pawl seat 9. A guide groove 14 is provided on the pawl 10. The guide rod 13 is movably connected to the guide groove 14. When the tension belt 6 drives the winding wheel 3 to rotate, the pawl 11 rotates outward under the action of centrifugal force. After the pawl 11 engages with the guide pawl 12, it drives the guide pawl 12 to slide, thereby driving the guide rod 13 to slide in the guide groove 14. When the guide rod 13 slides, the pawl 10 rotates to the position where it engages with the ratchet 8. Therefore, when the operator quickly tightens the tensioning strap 6 and secures the D-ring to the tensioning strap 6, the tensioning strap 6 and the winding wheel 3 move rapidly. At this time, the ratchet 8 connected to the winding wheel 3 also rotates rapidly. The pawl 11, which is mounted on the ratchet 8, rotates outward under centrifugal force. After rotating outward, the pawl 11 engages with the guide pawl 12. The pawl 11 then drives the guide pawl 12 to slide a certain distance along the pawl seat 9. As the guide pawl 12 slides, its guide rod 13, connected to the guide groove 14, can drive the pawl 10 to rotate a certain angle. When the pawl 10 rotates to engage with the ratchet 8... When engaged, both the ratchet 8 and the winding wheel are locked. Therefore, during actual operation, when the operator fixes the tension band 6 to D, the ratchet and pawl mechanism locks the winding wheel 3 in place. At this time, the winding wheel 3 is fixed and cannot rotate. The tension band 6 is in a fixed tensioned state, so the pressure of the tension band 6 on the pressure sensor 6 remains constant. This design avoids fluctuations in the pressure sensor reading due to disturbances during operation. After the tension band 6 is tightened, the pressure value detected by the pressure sensor 5 is stable, thus improving the accuracy and reliability of the detection unit.
[0022] To facilitate the connection between the tension strap 6 and the D-buckle during operation, the movable end of the tension strap 6 disclosed in this embodiment is provided with a safety hook 15 for connection with the D-buckle of the high-altitude work safety belt. The safety hook 15 is a commonly used standardized connector. The operator only needs to push open the safety lock with their thumb or one hand, align the hook opening, and put it into the D-buckle to quickly connect the two.
[0023] When the work is finished and it is necessary to disconnect the tensioning strap 6 from the D buckle, in order to release the locking state of the ratchet and pawl mechanism and for ease of operation, the pawl 10 disclosed in this embodiment is provided with a reset rod 18. The end of the reset rod 18 away from the pawl protrudes through the side wall of the mounting box 2. The side wall of the mounting box 2 is provided with a sliding groove 20 that allows the reset rod to slide. The outer end of the reset rod 18 is provided with a handle 19. At this time, the operator holds the handle 19 and manually moves the reset rod 18 downward. At this time, the reset rod 18 drives the pawl 10 to reset. When the pawl resets, it drives the guide pawl 12 to reset. At the same time, the guide pawl 12 squeezes and pushes the pawl 11 to rotate and achieve reset. After that, the pawl 10 disengages from the ratchet 8 and the winding wheel can rotate normally.
[0024] Furthermore, for ease of storage, a spiral spring is provided between the first rotating shaft 7 and the winding wheel 3 in this embodiment. The two ends of the spiral spring are fixedly connected to the outer wall of the first rotating shaft 7 and the inner wall of the winding wheel 3, respectively. When the pawl 10 disengages from the ratchet 8, the tension band is reset under the spring force of the spiral spring, thus facilitating storage.
[0025] In actual testing, to ensure that the safety hook 15 on the tensioning strap 6 is connected to the D buckle, the D buckle disclosed in this embodiment is equipped with a magnetic induction element, i.e., an induction magnet, and the safety hook 15 is equipped with a sensing unit that can couple with the magnetic induction element on the D buckle. The sensing unit is connected to the controller. Specifically, the sensing unit is a Hall sensor, which is located inside the hook opening of the safety hook 15. The sensing unit detects the magnetic coupling. When the safety buckle 15 on the tension band is fastened to the D buckle, the sensing unit senses the magnet and sends a clear connection status signal to the controller. The controller then determines that the safety buckle 15 and the D buckle are connected. A Hall sensor is used as the sensing unit because it can accurately and reliably convert the presence or absence of a magnetic field into a clear electrical signal. Furthermore, Hall sensors are small, have a long lifespan, and are well-suited for integration into the safety hook 15. In the previous scheme, the connection between the safety buckle 15 and the D buckle was determined solely by the pressure sensor detecting the pressure value. In this embodiment, a Hall sensor is used as the sensing unit, and the connection between the safety buckle 15 and the D buckle is determined by coupling the magnet to the Hall sensor. To ensure reliability, the controller is configured to determine that the safety buckle 15 and the D buckle are effectively connected only when the output value of the Hall sensor exceeds a preset intensity threshold.
[0026] Furthermore, such as Figure 5 and Figure 6As shown, in this embodiment, an electric push rod 21 is also provided on the end face of the ratchet 8. The telescopic end of the electric push rod 21 is connected to the actuating pawl 11. The electric push rod 21 is connected to the controller. When the electric push rod 21 extends, it can push the actuating pawl 11 outward. When a signal is received from the Hall sensor and the safety buckle 15 is confirmed to be effectively connected to the D buckle, and when the controller recognizes that the data detected by the pressure sensor exceeds the set pressure threshold but the pressure value continues to fluctuate and does not remain constant (the pressure value changes by more than ±10% within 1 second), the controller determines that the actuating pawl 11 has not been thrown out under the action of centrifugal force. At this time, the ratchet pawl is not in the meshing state. At this time, the controller can control the push rod of the miniature electric push rod 21 to extend, push the actuating pawl 11 to be thrown out, and then smoothly start the interlocking action of the guide pawl 12 and the pawl 10, so that the pawl 10 and the ratchet 8 enter the meshing state. In this embodiment, the introduction of an electric push rod 21 solves the defect in traditional designs where the pawl 11 may not be able to be thrown out when relying solely on centrifugal force. Because the pawl 11 may fail to be thrown out due to insufficient centrifugal force after the safety buckle is connected, resulting in a potential risk of engagement failure, this embodiment uses the electric push rod 21 to provide a certain mechanical thrust to forcibly trigger the interlocking action. This eliminates the safety hazard caused by mechanical action failure and ensures that the ratchet and pawl can be engaged after the safety buckle 15 and the D buckle are confirmed to be safely connected.
[0027] To achieve fall detection, a rotary encoder for detecting the winding wheel 3 is installed on the first rotating shaft 7, and the rotary encoder is connected to the controller. In this embodiment, the rotary encoder can determine the physical elongation of the tension band 6, and the controller is configured to monitor the extension length and speed of the tension band 6 in real time. When the extension length of the tension band 6 exceeds a preset threshold in a very short time (e.g., 0.2 seconds), the system determines that a fall has occurred, immediately triggers and connects an alarm, and can integrate a wireless module to send a distress signal to the backend.
[0028] To further enhance safety awareness, a dual-color LED indicator 16 is provided on one side of the helmet shell 1 disclosed in this embodiment. The dual-color LED indicator 16 is connected to the controller. The controller controls the indicator's display status based on the real-time detection results of the pressure sensor 5: when the detected pressure value reaches a preset safety threshold, it indicates that the D-ring is reliably connected, and the controller drives the dual-color LED indicator 16 to display a solid green light, sending a clear safety signal to the operator and surrounding personnel; conversely, when the pressure value is below the safety threshold or zero, it indicates that the connection is invalid or disconnected, and the controller drives the dual-color LED indicator 16 to display a flashing red light, serving as a prominent warning to remind the operator to immediately check and reconnect. This intuitive light signal feedback achieves real-time, visual monitoring of the safety connection status, greatly improving the identification of safety conditions. Furthermore, for power supply, a rechargeable lithium battery pack is provided inside the mounting box 2. The charging port (such as USB-C) is located on the side of the mounting box and is equipped with a waterproof and dustproof cover. A rear cover (not shown in the figure) is provided on the rear side of the mounting box, through which the tension strap passes. In summary, the safety warning helmet disclosed in this invention monitors the pressure sensor 5 in real time through a controller and performs hierarchical logical judgments based on preset thresholds: when the detected pressure is extremely low or zero, the system determines it to be in an unconnected or completely loose state, and no alarm is triggered; when a Hall sensor signal is detected and the pressure sensor detects pressure but it does not reach the preset safety threshold, the system determines it to be in a dangerous state of "connected but not effectively tightened" or "D-buckle not fixed to the anchor point," at which point the controller will activate a buzzer alarm and illuminate a red light to warn the operator; only when the operator fully tightens the tensioning strap 6, causing the pressure to exceed the safety threshold, does the system confirm a safe connection state, at which point the alarm stops and the green light remains constantly on, providing intuitive safety confirmation. This design not only achieves dynamic monitoring and real-time feedback of the safety status, but also greatly improves the accuracy of warnings and the safety of operations by distinguishing between connected and effectively connected states.
[0029] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.
Claims
1. A safety warning helmet for detecting whether the D-buckle of a high-altitude work safety belt is connected to an anchor point, wherein the D-buckle is provided with a magnetic induction element, characterized in that, The safety warning helmet includes: Helmet shell (1); The detection unit includes a mounting box (2), a winding wheel (3), a tensioning strap (6), a guide wheel (4), a pressure sensor (5), and a controller. The mounting box (2) is located on the rear side of the helmet shell (1). The winding wheel (3) is rotatably mounted inside the mounting box (2). The tensioning strap (6) is wound around the winding wheel (3). The guide wheel (4) is located inside the mounting box (2) and on one side of the winding wheel (3). The pressure sensor (5) is also mounted on the guide wheel (4). The movable end of the tensioning strap (6) passes around the guide wheel (4) and is connected to the D-ring. The pressure sensor (5) is connected to the controller. The tensioning strap (6) is connected to the D-ring and can apply pressure to the pressure sensor (5) when it is tightened. A buzzer is installed on one side of the helmet shell (1) and connected to the controller. In the working state, when the pressure sensor (5) detects that the tension band (6) is not in a tensioned state, the controller controls the buzzer to sound an alarm.
2. A safety warning helmet according to claim 1, characterized in that, The winding wheel (3) rotates within the mounting box (2) via a first rotating shaft (7). A ratchet (8) is provided at one end of the winding wheel (3), and a pawl (11) is rotatably provided on the end face of the ratchet (8). A pawl seat (9) is also provided inside the mounting box (2). A guide pawl (12) that can engage with the pawl (11) is slidably provided on the pawl seat (9). A guide rod (13) is provided on the guide pawl (12), and a pawl (10) is rotatably provided on the pawl seat (9). The pawl (10) is provided with a guide groove (14), and the guide rod (13) is movably connected to the guide groove (14). When the tensioning belt (6) drives the winding wheel (3) to rotate, the actuating pawl (11) rotates outward. After the actuating pawl (11) engages with the guide pawl (12), it drives the guide pawl (12) to slide, thereby driving the guide rod (13) to slide in the guide groove (14) and causing the pawl (10) to rotate to the position of engaging with the ratchet (8).
3. A safety warning helmet according to claim 2, characterized in that, A reset rod (18) is provided on the pawl (10). The end of the reset rod (18) away from the pawl extends through the side wall of the mounting box (2). A handle (19) is provided on the outer end of the reset rod (18).
4. A safety warning helmet according to claim 2, characterized in that, A spiral spring is provided between the first rotating shaft (7) and the winding wheel (3), and the two ends of the spiral spring are fixedly connected to the outer wall of the first rotating shaft (7) and the inner wall of the winding wheel (3), respectively.
5. A safety warning helmet according to claim 1, characterized in that, The movable end of the tensioning strap (6) is provided with a safety hook (15) for connecting with the D buckle of the high-altitude work safety belt.
6. A safety warning helmet according to claim 5, characterized in that, The safety hook (15) is provided with a sensing unit that can couple with the magnetic induction element on the D buckle, and the sensing unit is connected to the controller.
7. A safety warning helmet according to claim 6, characterized in that, The sensing unit is a Hall sensor, which is located inside the hook opening of the safety hook (15).
8. A safety warning helmet according to claim 6, characterized in that, An electric push rod (21) is also provided on the end face of the ratchet (8). The telescopic end of the electric push rod (21) is connected to the actuating pawl (11). The electric push rod (21) is connected to the controller. When the electric push rod (21) extends, it can push the actuating pawl (11) outward.
9. A safety warning helmet according to claim 2, characterized in that, A dual-color LED indicator (16) is provided on one side of the helmet shell (1), and the dual-color LED indicator (16) is connected to the controller.
10. A safety warning helmet according to claim 9, characterized in that, The first rotating shaft (7) is provided with a rotary encoder for detecting the winding wheel (3), and the rotary encoder is connected to the controller.