Coal mine personnel behavior safety monitoring device

Abstract

The invention relates to the technical field of coal mine safety production, in particular to a coal mine personnel behavior safety monitoring device. The invention provides a coal mine personnel behavior safety monitoring device which is convenient for real-time comprehensive monitoring of production operation of coal mine personnel, can timely remind and limit violation personnel of the coal mine personnel, and avoids safety accidents. A coal mine personnel behavior safety monitoring device comprises a safety helmet, a connecting frame and the like, and the connecting frame is connected to the lower side of the left portion of the safety helmet. The monitoring probe is fixed in a working area of coal mine personnel, the monitoring probe is adjusted to an optimal monitoring angle, and when illegal operation is monitored, the series motor is started, so that the rotating arc-shaped plate is unfolded to obstruct the coal mine personnel, the production operation of the coal mine personnel is comprehensively monitored in real time, and the working efficiency of the coal mine personnel is improved. And illegal personnel of the coal mine personnel can be reminded and limited in time, so that safety accidents are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine production safety, and in particular to a coal mine personnel behavior safety monitoring device. Background Art

[0002] In the coal mine production process, the safety behavior of personnel is directly related to the stability and safety of the entire production system. However, due to the particularity of the coal mine working environment, such as small space, insufficient light, loud noise and many potential sources of danger, coal mine personnel are prone to illegal work behaviors, such as not wearing necessary safety protection equipment, entering dangerous areas without authorization, violating operating procedures, etc. These illegal work behaviors not only threaten the life safety of the workers, but also may cause major safety accidents, bringing huge economic losses and adverse effects to coal mine enterprises and society.

[0003] The existing behavioral safety monitoring of coal mine personnel mainly monitors and supervises the operations of coal mine personnel through a combination of regular inspections by safety officers and real-time monitoring by cameras. However, both manual inspections and camera monitoring have blind spots, making it difficult to accurately monitor the operations of coal mine personnel, and it is impossible to promptly remind or restrict the operations of violators, which can easily lead to safety accidents.

[0004] Therefore, a coal mine personnel behavior safety monitoring device is now developed that is convenient for real-time and comprehensive monitoring of the production operations of coal mine personnel, and can promptly remind and restrict coal mine personnel who violate regulations to avoid safety accidents. Summary of the invention

[0005] In order to overcome the shortcomings of existing coal mine personnel behavior safety monitoring, which has blind spots, makes it difficult to accurately monitor the coal mine personnel's operations, and cannot timely remind or restrict the operations of violators, which easily leads to safety accidents, the invention provides a coal mine personnel behavior safety monitoring device that is convenient for real-time and comprehensive monitoring of the production operations of coal mine personnel, and can promptly remind and restrict violators of the coal mine personnel to avoid safety accidents.

[0006] The technical solution of the present invention is: a coal mine personnel behavior safety monitoring device, including a safety helmet, a connecting frame, a strap, a fixed frame, a rotating part, a locking knob, a locking tooth, a first spring, a monitoring mechanism and an expansion mechanism, the lower side of the left part of the safety helmet is connected to the connecting frame, the lower side of the right part of the safety helmet is connected to the strap, the lower sides of the front and rear parts of the connecting frame are connected to the fixed frames, the rotating parts are rotatably connected between the fixed frames, the front part of the rotating part is slidably and rotatably connected to the locking knob, the first spring is connected between the locking knob and the rotating part, the front side of the front fixed frame is connected to the locking tooth, the locking tooth cooperates with the locking knob, the safety helmet is provided with a monitoring mechanism capable of monitoring the behavior of coal mine personnel, and the safety helmet is also provided with an expansion mechanism capable of hindering personnel who violate the regulations.

[0007] As a preferred technical solution of the present invention, the safety helmet has an arc-shaped structure.

[0008] As a preferred technical solution of the present invention, a slot is provided on the rotating member.

[0009] As a preferred technical solution of the present invention, the locking knob is provided with anti-slip grooves.

[0010] As a preferred technical solution of the present invention, the monitoring mechanism includes a positioning member, a speaker, a docking member, a first fixed seat and a monitoring probe. The positioning member is connected to the front side of the safety helmet, the speaker is connected to the upper side of the positioning member, the docking member is clamped on the positioning member, the docking member is connected to the first fixed seat, the monitoring probe is rotatably connected to the first fixed seat, and the monitoring probe is electrically connected to the speaker. When coal mine personnel perform irregular operations or improper operations, an alarm signal can be transmitted to the monitoring probe, and then the monitoring probe controls the speaker to sound an alarm to remind the coal mine personnel. The monitoring probe can be placed at a better monitoring angle by removing the docking member from the positioning member and then fixing the docking member near the working area of ​​the coal mine personnel.

[0011] As a preferred technical solution of the present invention, it also includes an unfolding mechanism, which includes a second fixed seat, a rotating arc plate, a torsion spring, a series-excited motor and a limit frame. A plurality of second fixed seats are connected to the outer side of the lower part of the safety helmet, and the second fixed seats are rotatably connected to the rotating arc plates. The rotating arc plates are connected to the second fixed seats with two left and right torsion springs. At this time, the torsion spring is in a deformed state, and a series-excited motor is connected to the upper side of the safety helmet. The limit frame is connected to the output shaft of the series-excited motor, and the rotating arc plates are squeezed and matched with the limit frame. The series-excited motor is started to rotate the limit frame, so that the limit frame rotates and disengages from the rotating arc frame. The torsion spring rebounds, driving the rotating arc plate to rotate and unfold on the second fixed seat, so that the rotating arc plate hinders the operation of the coal mine personnel.

[0012] As a preferred technical solution of the present invention, it also includes an installation auxiliary mechanism, which includes a sliding installation plate, an anti-slip buckle and a connecting piece. The sliding installation plate is slidably connected to the docking piece, the anti-slip buckle is connected to the sliding installation plate, and the connecting piece is connected to the front side of the sliding installation plate. The anti-slip buckle is pressed, and then the sliding installation plate is pushed to slide on the docking piece, so that the connecting piece slides out of the docking piece, and then the connecting piece is used to insert it near the working area of ​​the coal mine personnel.

[0013] As a preferred technical solution of the present invention, an anti-slip groove is provided on the sliding mounting plate.

[0014] As a preferred technical solution of the present invention, friction patterns are provided on the anti-slip buckle.

[0015] As a preferred technical solution of the present invention, it also includes a locking mechanism, which includes a guide frame, a sliding frame, a first cylindrical cam, a second cylindrical cam, a second spring, a pull wire, a wire hose, a covering belt and a rotating wheel. The guide frame is connected to the upper side of the safety helmet, the guide frame is located at the rear side of the series-excited motor, a rotating rod is provided on the output shaft of the series-excited motor, the guide frame is rotatably connected to the rotating rod, the sliding frame is slidably connected to the guide frame, a second spring is connected between the sliding frame and the guide frame, the first cylindrical cam is connected to the front of the sliding frame, the first cylindrical cam is rotatably connected to the rotating rod, the rotating rod is connected to the second cylindrical cam, the second cylindrical cam is The first cylindrical cam is in contact and cooperated, a wire hose is connected to the safety helmet, a pull wire is sleeved inside the wire hose, the pull wire is connected to the second cylindrical cam, a covering belt is connected to the rear side of the rear fixed frame, a rotating wheel is connected to the rear of the rotating member, the pull wire is connected to the covering belt, the covering belt is in contact with the rotating wheel, the series-excited motor is started, the rotating rod is rotated, the second cylindrical cam is rotated, the second cylindrical cam is in contact with the first cylindrical cam, the first cylindrical cam slides upward, driving the sliding frame to slide upward on the guide frame, the second spring is stretched, and when the sliding frame slides upward, the pull wire is pulled, so that the pull wire is tightened in the wire hose, and the covering belt is tightened.

[0016] Beneficial effects: 1. The present invention fixes the monitoring probe in the working area of ​​the coal mine personnel, adjusts the monitoring probe to the optimal monitoring angle, and starts the series-excited motor when illegal operations are monitored, so that the rotating arc plate is unfolded to hinder the coal mine personnel, thereby facilitating real-time and comprehensive monitoring of the production operations of the coal mine personnel, and can promptly remind and restrict illegal coal mine personnel to avoid safety accidents.

[0017] 2. The present invention removes the monitoring probe from the safety helmet, presses the anti-slip buckle, and then pushes the sliding mounting plate to slide on the docking piece, so that the connecting piece slides out of the docking piece, and then uses the connecting piece to be inserted near the working area of ​​the coal miner, thereby achieving the effect of being able to fix the docking piece through the connecting piece, thereby facilitating the monitoring probe to be fixed in the working area of ​​the coal miner.

[0018] 3. The present invention starts the series-excited motor to rotate the second cylindrical cam, and the second cylindrical cam contacts the first cylindrical cam to slide upward, driving the sliding frame to slide upward on the guide frame to pull the pull wire, so that the covering belt is tightened to limit the rotation of the rotating wheel, thereby achieving the effect of restricting the violators from removing the safety helmets from their heads and preventing the coal mine personnel from continuing to operate in violation of the regulations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a partial three-dimensional structural schematic diagram of the present invention.

[0021] Figure 3 It is a partial three-dimensional structure explosion diagram of the present invention.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the monitoring mechanism of the present invention.

[0023] Figure 5 It is a partial three-dimensional structural schematic diagram of the monitoring mechanism of the present invention.

[0024] Figure 6 It is a three-dimensional structural schematic diagram of the unfolding mechanism of the present invention.

[0025] Figure 7 This is a schematic diagram of a first three-dimensional structure of the installation auxiliary mechanism of the present invention.

[0026] Figure 8 This is a schematic diagram of a second three-dimensional structure of the installation auxiliary mechanism of the present invention.

[0027] Fig. 9 It is a three-dimensional structural schematic diagram of the locking mechanism of the present invention.

[0028] Fig.10 It is a partial enlarged view of the first three-dimensional structure of the locking mechanism of the present invention.

[0029] Fig.11 It is a partial enlarged view of the second three-dimensional structure of the locking mechanism of the present invention.

[0030] Wherein: 1-safety helmet, 2-connecting frame, 3-binding strap, 4-fixing frame, 5-rotating member, 6-locking knob, 61-locking tooth, 7-first spring, 8-monitoring mechanism, 80-aligning member, 801-speaker, 81-docking member, 82-first fixing seat, 83-monitoring probe, 9-unfolding mechanism, 90-second fixing seat, 91-rotating arc plate, 92-torsion spring, 93-series motor, 94-limiting frame, 10-installation auxiliary mechanism, 101-sliding mounting plate, 102-anti-slip buckle, 103-connecting member, 11-locking mechanism, 111-guide frame, 112-sliding frame, 113-first cylindrical cam, 114-second cylindrical cam, 115-second spring, 116-pull wire, 117-conductor hose, 118-wrapping belt, 119-rotating wheel. DETAILED DESCRIPTION

[0031] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention.

[0032] A coal mine personnel behavior safety monitoring device, such as Figure 1-Figure 3 As shown, it includes a safety helmet 1, a connecting frame 2, a strap 3, a fixing frame 4, a rotating member 5, a locking knob 6, a locking tooth 61, a first spring 7, a monitoring mechanism 8 and an unfolding mechanism 9. The connecting frame 2 is connected to the lower side of the left portion of the safety helmet 1, and the strap 3 is connected to the lower side of the right portion of the safety helmet 1. The safety helmet 1 is an arc-shaped structure, which can disperse external impact and provide better protection. The front and rear lower sides of the connecting frame 2 are connected to the fixing frame 4. The rotating member 5 is rotatably connected between the fixing frames 4. The rotating member 5 is provided with a slot. The front part of the rotating member 5 is slidably and rotatably connected to the locking knob 6. The locking knob 6 is provided with anti-slip grooves for easy rotation. A first spring 7 is connected between the locking knob 6 and the rotating member 5. The front side of the front fixing frame 4 is connected to the locking tooth 61, and the locking tooth 61 cooperates with the locking knob 6. The safety helmet 1 is provided with a monitoring mechanism 8, and the safety helmet 1 is also provided with an unfolding mechanism 9.

[0033] like Figure 1 , Figure 4 and Figure 5 As shown, the monitoring mechanism 8 includes a positioning member 80, a speaker 801, a docking member 81, a first fixed seat 82 and a monitoring probe 83. The positioning member 80 is connected to the front side of the safety helmet 1, the speaker 801 is connected to the upper side of the positioning member 80, the docking member 81 is clamped on the positioning member 80, the docking member 81 is connected to the first fixed seat 82, the first fixed seat 82 is rotatably connected to the monitoring probe 83, and the monitoring probe 83 is electrically connected to the speaker 801.

[0034] like Figure 1 and 6As shown, it also includes an unfolding mechanism 9, which includes a second fixed seat 90, a rotating arc plate 91, a torsion spring 92, a series-excited motor 93 and a limit frame 94. Eight second fixed seats 90 are connected to the outer side of the lower part of the safety helmet 1. The second fixed seats 90 are rotatably connected to the rotating arc plates 91. The rotating arc plates 91 are connected to the second fixed seats 90 connected thereto with two left and right torsion springs 92. At this time, the torsion spring 92 is in a deformed state. The series-excited motor 93 is connected to the upper side of the safety helmet 1. The limit frame 94 is connected to the output shaft of the series-excited motor 93. The rotating arc plates 91 are squeezed and matched with the limit frame 94.

[0035] When using the present invention, the safety helmet 1 is first worn on the head of the coal mine worker, and then the binding belt 3 is placed in the slot on the rotating member 5, and then the locking knob 6 is rotated. Under the cooperation of the locking knob 6 and the locking tooth 61, the locking knob 6 slides on the rotating member 5. At the same time, under the action of the first spring 7, after the rotation is completed, the locking knob 6 and the locking tooth 61 are re-engaged, so that the locking knob 6 can only be rotated in one direction to close the binding belt 3. By closing the binding belt 3, the safety helmet 1 is fixed on the coal mine. When the safety helmet 1 needs to be taken off, the locking knob 6 is slid forward, the first spring 7 is squeezed and contracted, and then the rotating member 5 is rotated in the opposite direction, so that the strap 3 is loosened, and the safety helmet 1 can be taken off. When the coal miners are working, the monitoring probe 83 is rotated and adjusted to a suitable angle on the first fixing seat 82, so that the monitoring probe 83 can obtain the working picture of the coal miners and transmit the picture to the monitoring room, so that the safety personnel can monitor the working process of the coal miners. In case of irregular operation or improper operation, an alarm signal can be transmitted to the monitoring probe 83, and then the monitoring probe 83 controls the speaker 801 to give an alarm to remind the coal mine personnel. By removing the docking piece 81 from the positioning piece 80 and fixing the docking piece 81 near the working area of ​​the coal mine personnel, the monitoring probe 83 can be placed at a better monitoring angle, so that the operation safety of the coal mine personnel can be better monitored. When the monitoring probe 83 detects that the coal mine personnel have violated the regulations, the series motor 93 is controlled to start, so that the limit frame 94 rotates, so that the limit frame 94 rotates and disengages from the rotating arc frame, and the torsion spring 92 rebounds, driving the rotating arc plate 91 to rotate and unfold on the second fixed seat 90, so that the rotating arc plate 91 hinders the operation of the coal mine personnel, and at the same time enables other nearby staff to promptly discover and stop the illegal operators, thereby facilitating real-time and comprehensive monitoring of the production operations of the coal mine personnel, and being able to promptly remind and restrict the illegal operators of the coal mine personnel to avoid safety accidents.

[0036] like Figure 1 , Figure 7 and Figure 8As shown, it also includes an installation auxiliary mechanism 10, which includes a sliding installation plate 101, an anti-slip buckle 102 and a connecting piece 103. The sliding installation plate 101 is slidingly connected to the docking piece 81, and the sliding installation plate 101 is provided with an anti-slip groove to improve the stability during installation. The sliding installation plate 101 is connected to the anti-slip buckle 102, and the anti-slip buckle 102 is provided with friction patterns to facilitate pushing. The front side of the sliding installation plate 101 is connected to the connecting piece 103.

[0037] The installation auxiliary mechanism 10 of the present device can be used to assist in the installation of the docking piece 81 and the monitoring probe 83. After the monitoring probe 83 is removed from the safety helmet 1, the anti-slip buckle 102 is pressed, and then the sliding installation plate 101 is pushed to slide on the docking piece 81, so that the connecting piece 103 slides out of the docking piece 81, and then the connecting piece 103 is inserted into the vicinity of the working area of ​​the coal mine personnel to fix the docking piece 81 and the monitoring probe 83, thereby playing a role in fixing the docking piece 81 through the connecting piece 103, and assisting in fixing the monitoring probe 83 in the working area of ​​the coal mine personnel.

[0038] like Figure 1 , Fig. 9 , Fig.10 and Fig.11 As shown, the safety helmet 1 also includes a locking mechanism 11, which includes a guide frame 111, a sliding frame 112, a first cylindrical cam 113, a second cylindrical cam 114, a second spring 115, a pull line 116, a wire hose 117, a covering belt 118 and a rotating wheel 119. The upper side of the safety helmet 1 is connected to the guide frame 111, the guide frame 111 is located at the rear side of the series-excited motor 93, and a rotating rod is provided on the output shaft of the series-excited motor 93. The guide frame 111 is rotatably connected to the rotating rod, and the sliding frame 112 is slidably connected to the guide frame 111. The second spring is connected between the sliding frame 112 and the guide frame 111. 115, a first cylindrical cam 113 is connected to the front of the sliding frame 112, and the first cylindrical cam 113 is rotatably connected to the rotating rod, and a second cylindrical cam 114 is connected to the rotating rod, and the second cylindrical cam 114 is in contact and cooperation with the first cylindrical cam 113, a wire hose 117 is connected to the safety helmet 1, and a pull wire 116 is sheathed in the wire hose 117, and the pull wire 116 is connected to the second cylindrical cam 114, a covering belt 118 is connected to the rear side of the rear fixing frame 4, and a rotating wheel 119 is connected to the rear of the rotating member 5, and the pull wire 116 is connected to the covering belt 118, and the covering belt 118 is in contact with the rotating wheel 119.

[0039] The use of the locking mechanism 11 of the device can prevent illegal workers from forcibly taking the safety helmet 1. When the monitoring probe 83 detects that the coal mine workers are working in violation of the regulations, the series-excited motor 93 is started, the rotating rod is rotated, and the second cylindrical cam 114 is rotated. The second cylindrical cam 114 contacts the first cylindrical cam 113, so that the first cylindrical cam 113 slides upward, driving the sliding frame 112 to slide upward on the guide frame 111, and the second spring 115 is stretched. When the sliding frame 112 slides upward, the pull wire 116 is pulled, so that the pull wire 116 is tightened in the wire hose 117, so that the covering belt 118 is tightened, so that the covering belt 118 is tightly attached to the rotating wheel 119, limiting the rotation of the rotating wheel 119, so that the rotating member 5 cannot rotate, and the safety helmet 1 cannot be removed from the head of the coal mine workers, thereby limiting the illegal workers from removing the safety helmet 1 from their heads and preventing the coal mine workers from continuing to work in violation of the regulations.

[0040] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. A coal mine personnel behavior safety monitoring device, characterized in that: The invention comprises a safety helmet (1), a connecting frame (2), a binding belt (3), a fixing frame (4), a rotating member (5), a locking knob (6), a locking tooth (61), a first spring (7), a monitoring mechanism (8) and an unfolding mechanism (9). The lower left side of the safety helmet (1) is connected to the connecting frame (2), the lower right side of the safety helmet (1) is connected to the binding belt (3), the lower front and rear sides of the connecting frame (2) are both connected to the fixing frame (4), and the fixing frame (4) is rotatably connected to the rotating member (5). 5), a locking knob (6) is slidably and rotatably connected to the front of the rotating member (5), a first spring (7) is connected between the locking knob (6) and the rotating member (5), a locking tooth (61) is connected to the front side of the front fixed frame (4), the locking tooth (61) cooperates with the locking knob (6), a monitoring mechanism (8) capable of monitoring the behavior of coal mine personnel is provided on the safety helmet (1), and a deployment mechanism (9) capable of hindering illegal workers is also provided on the safety helmet (1).

2. A coal mine personnel behavior safety monitoring device as claimed in claim 1, characterized in that: The safety helmet (1) is an arc-shaped structure.

3. A coal mine personnel behavior safety monitoring device as claimed in claim 1, characterized in that: A slot is formed on the rotating member (5).

4. A coal mine personnel behavior safety monitoring device as claimed in claim 1, characterized in that: The locking knob (6) is provided with anti-slip grooves.

5. A coal mine personnel behavior safety monitoring device as claimed in claim 1, characterized in that: The monitoring mechanism (8) comprises a positioning member (80), a speaker (801), a docking member (81), a first fixing seat (82) and a monitoring probe (83). The front side of the safety helmet (1) is connected to the positioning member (80), the upper side of the positioning member (80) is connected to the speaker (801), the positioning member (80) is clamped with the docking member (81), the docking member (81) is connected to the first fixing seat (82), the first fixing seat (82) is rotatably connected to the monitoring probe (83), and the monitoring probe (83) is connected to the first fixing seat (82). The probe (83) is electrically connected to the speaker (801). When the coal mine personnel perform irregular operations or improper operations, an alarm signal can be transmitted to the monitoring probe (83), and then the monitoring probe (83) controls the speaker (801) to sound an alarm to remind the coal mine personnel. The monitoring probe (83) can be placed at a better monitoring angle by removing the docking member (81) from the alignment member (80) and then fixing the docking member (81) near the working area of ​​the coal mine personnel.

6. A coal mine personnel behavior safety monitoring device as claimed in claim 5, characterized in that: The safety helmet (1) also includes an unfolding mechanism (9), which includes a second fixed seat (90), a rotating arc plate (91), a torsion spring (92), a series-excited motor (93) and a limit frame (94). The lower outer side of the safety helmet (1) is connected to a plurality of second fixed seats (90), each of which is rotatably connected to a rotating arc plate (91), and two left and right torsion springs (92) are connected between the rotating arc plates (91) and the connected second fixed seats (90). At this time, the torsion springs (92) are in a deformed state. In this state, a series-excited motor (93) is connected to the upper side of the safety helmet (1), a limit frame (94) is connected to the output shaft of the series-excited motor (93), and the rotating arc plate (91) is squeezed and matched with the limit frame (94). The series-excited motor (93) is started to rotate the limit frame (94), so that the limit frame (94) rotates and disengages from the rotating arc frame, and the torsion spring (92) rebounds, driving the rotating arc plate (91) to rotate and unfold on the second fixed seat (90), so that the rotating arc plate (91) hinders the operation of coal mine personnel.

7. A coal mine personnel behavior safety monitoring device as claimed in claim 6, characterized in that: The invention also comprises an installation auxiliary mechanism (10), wherein the installation auxiliary mechanism (10) comprises a sliding installation plate (101), an anti-slip buckle (102) and a connecting piece (103); the sliding installation plate (101) is slidably connected to the docking piece (81); the sliding installation plate (101) is connected to the anti-slip buckle (102); the front side of the sliding installation plate (101) is connected to the connecting piece (103); the anti-slip buckle (102) is pressed, and then the sliding installation plate (101) is pushed to slide on the docking piece (81), so that the connecting piece (103) slides out of the docking piece (81), and then the connecting piece (103) is inserted into the vicinity of the working area of ​​the coal mine personnel.

8. A coal mine personnel behavior safety monitoring device as claimed in claim 7, characterized in that: The sliding mounting plate (101) is provided with an anti-skid groove.

9. A coal mine personnel behavior safety monitoring device as claimed in claim 7, characterized in that: The anti-slip buckle (102) is provided with friction patterns.

10. A coal mine personnel behavior safety monitoring device as claimed in claim 7, characterized in that: The device also includes a positioning mechanism (11), wherein the positioning mechanism (11) includes a guide frame (111), a sliding frame (112), A first cylindrical cam (113), a second cylindrical cam (114), a second spring (115), a pull wire (116), a wire hose (117), a covering belt (118) and a rotating wheel (119); a guide frame (111) is connected to the upper side of the safety helmet (1); the guide frame (111) is located at the rear side of the series-excited motor (93); a rotating rod is provided on the output shaft of the series-excited motor (93); the guide frame (111) is rotatably connected to the rotating rod; the guide frame (111) The upper slide is connected with a slide frame (112), a second spring (115) is connected between the slide frame (112) and the guide frame (111), a first columnar cam (113) is connected to the front of the slide frame (112), the first columnar cam (113) is rotatably connected to the rotating rod, a second columnar cam (114) is connected to the rotating rod, the second columnar cam (114) is in contact with the first columnar cam (113), and a wire hose is connected to the safety helmet (1) (117), a pull wire (116) is sheathed inside the wire hose (117), the pull wire (116) is connected to the second cylindrical cam (114), a covering belt (118) is connected to the rear side of the rear fixed frame (4), a rotating wheel (119) is connected to the rear of the rotating member (5), the pull wire (116) is connected to the covering belt (118), the covering belt (118) is in contact with the rotating wheel (119), the series motor (93) is started, so that the rotating rod rotates, so that the second cylindrical cam (114) rotates, and the second columnar cam (114) contacts the first columnar cam (113), so that the first columnar cam (113) slides upward, driving the sliding frame (112) to slide upward on the guide frame (111), and the second spring (115) is stretched. When the sliding frame (112) slides upward, the pull wire (116) is pulled, so that the pull wire (116) is tightened in the wire hose (117), so that the covering belt (118) is tightened.

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