Safety monitoring equipment
By combining the airbag trigger mechanism and laser detection components, the problem of laser detection error triggering in dust environments is solved, high-precision illegal intrusion detection and accurate positioning is achieved, and the safety monitoring effect at the construction site is enhanced.
Patent Information
- Application Number
- CN202510278772.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2025-07-11
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Laser detection equipment at existing construction sites is prone to be triggered in a dusty environment, resulting in a decrease in detection accuracy and it is difficult to accurately locate the illegal intruders when a brief alarm is made.
The airbag trigger mechanism is combined with the laser detection component, and the airbag trigger mechanism is used to avoid dust particles affecting laser detection. The combined positioning mechanism extends the alarm time and protects the components to block illegal intruders, improving detection accuracy and positioning accuracy.
Improve the accuracy of laser detection, avoid false alarms, extend alarm time, ensure that security personnel can quickly and accurately locate and block illegal intruders, and reduce property losses.
Smart Images
Figure CN120294860A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of monitoring devices, and more particularly, to a safety monitoring device. Background Art
[0002] With the development of monitoring projects such as safe cities and intelligent protection, the monitoring systems in schools, communities, factories, etc. in our country are booming. In large-scale construction sites, there is a certain degree of radioactive pollution, and it is necessary to conduct large-scale monitoring manually to prevent pedestrians or animals from straying in and endangering physical safety. However, there are still some deficiencies in the monitoring efficiency of existing safety monitoring solutions and devices.
[0003] In the prior art, when monitoring a construction site, a laser detection component is generally set at the entrance and exit. When a person breaks in illegally, the laser will be deflected and then an alarm will be triggered to remind the security personnel to expel the person in time. However, it is relatively simple to judge whether there is someone through laser detection, and there is more dust at the construction site, and there are more large particle impurities floating in the surrounding air. When the laser irradiates large impurity particles, the irradiation angle will deviate, thus affecting the laser path and triggering the alarm of the system, which affects the overall detection accuracy. How to invent a safety monitoring device to solve these problems has become an urgent problem for those skilled in the art. Summary of the Invention
[0004] To make up for the above deficiencies, the present invention provides a safety monitoring device, aiming to solve the problem that it is relatively simple to judge whether there is someone through laser detection, which affects the overall detection accuracy.
[0005] The present invention is implemented as follows: The present invention provides a safety monitoring device, including a fixed seat and an airbag arranged on the fixed seat. A cavity and a driving cavity are respectively formed inside the fixed seat. A connecting seat is installed on the side wall of the cavity. One end of the connecting seat is installed with a fixed frame. The upper end of the fixed frame is installed with a first limiting frame. A positioning block is installed on the inner wall of the first limiting frame. One end of the positioning block is installed with a pressing plate. A conductive ring is installed on one side of the pressing plate. A terminal box is installed on the inner wall of the driving cavity. A connecting wire is installed on the interface of the terminal box. The connecting wire is disconnected at a position close to the pressing plate. Laser generators and laser receivers are respectively installed on both sides of the fixed seat. An alarm is installed on the side wall of the laser generator; The airbag is installed in the upper groove of the fixed seat. A fixed sleeve is installed on the inner wall of the airbag. A fixed ring is installed on the inner wall of the fixed sleeve. A third spring is installed at the upper end of the fixed ring. A piston rod is installed on the inner wall of the fixed ring. A piston piece is installed at the upper end of the piston rod. An adjusting block is installed at the lower end of the piston rod. A baffle is installed on one side of the adjusting block.
[0006] Preferably, the inner wall of the first limiting frame of the fixed seat is slidably connected to the outer wall of the positioning block. One end of the inner wall of the positioning block is provided with a first spring fixedly connected to the inner wall of the first limiting frame. The two disconnected ends of the connecting wire are provided with contact pieces, and the conductive ring conducts the connecting wire by contacting the contact pieces. The terminal box is electrically connected to the laser generator, the laser receiver, and the alarm respectively.
[0007] Preferably, the outer side wall of the airbag is fixedly connected to the inner wall of the fixed seat. The two side walls of the third spring are respectively fixedly connected to one side of the fixed ring and the piston piece. The outer wall of the piston rod is slidably connected to the inner wall of the fixed ring. The side wall of the adjusting block abuts against one end of the positioning block.
[0008] Preferably, a positioning assembly is installed at the bottom end of the cavity. The positioning assembly includes a limiting frame, a reset block, and a limiting block. One end of the two limiting frames is respectively fixedly connected to the side wall of the connecting seat and the inner wall of the cavity. The inner wall of the limiting frame is slidably connected to the outer wall of the reset block. One end of the inner wall of the reset block is provided with a fourth spring fixedly connected to the inner wall of the limiting frame.
[0009] Preferably, positioning grooves inserted with the limiting blocks are formed on the two outer side walls of the adjusting block. A slot is formed at the bottom end of the adjusting block. A sliding sleeve is slidably connected to the inner wall of the slot. A guide rod slidably connected to the inner wall of the cavity is installed in the inner wall of the sliding sleeve. A second spring is sleeved on the outer wall of the guide rod. The two side walls of the second spring are respectively fixedly connected to the top inner wall of the sliding sleeve and the bottom end of the cavity.
[0010] Preferably, symmetric fixing rods are fixedly connected to the side wall of the sliding sleeve. A fixing plate is installed at one end of the fixing rod. Symmetric inclined plates are fixedly connected to the side wall of the fixing plate. The upper inclined surface of the inclined plate abuts against and slides on the side wall of the limiting block.
[0011] Preferably, a protection assembly is installed in the cavity and the driving cavity. The protection assembly includes a sliding rod, an adjusting plate, a protection plate, a rotating shaft, a torsion spring, an adjusting rod, and an inserting block. The bottom end of the sliding rod is fixedly connected to a sliding block slidably connected to the inner wall of the cavity. A return spring fixedly connected to the inner wall of the cavity is installed in the inner wall of the sliding block.
[0012] Preferably, an extrusion block abutting against one end of the sliding rod is fixedly connected to the side wall of the sliding sleeve. One end of the sliding rod is fixedly connected to one end of the adjusting plate. A notch is formed at one end of the protection plate. One end of the rotating shaft is fixedly connected to the notch. The outer wall of the rotating shaft is rotatably connected to the inner wall of the fixed seat close to the driving cavity. The torsion spring is sleeved on the outer side of the rotating shaft. The two side walls of the torsion spring are respectively fixedly connected to the upper end of the notch and the outer wall of the fixed seat. A fixing groove is formed at the bottom end of the rotating shaft.
[0013] Preferably, a guide frame is installed on the side wall of the driving cavity. The inner wall of the guide frame is slidably connected to the outer wall of the adjusting rod. An inclined slot is formed at the bottom end of the adjusting rod. One end of the adjusting plate is provided with a top block that abuts against and slides in the inclined slot. The upper end of the adjusting rod is provided with a plug block that is inserted into the fixing slot.
[0014] The beneficial effects of the present invention are as follows: The provided airbag triggering mechanism and the laser detection component do not give an alarm when either of them is triggered alone, avoiding the influence of dust particles in the air on laser detection, thereby preventing the laser detection component from being accidentally triggered and improving the overall measurement accuracy; The provided positioning mechanism extends the alarm time, effectively avoiding the problem that security personnel cannot quickly determine the location during a short alarm, improving the accuracy of locating the alarm position, and enabling rapid investigation of the location of illegal intrusion; The provided protection component blocks illegal intruders, increasing the difficulty of intrusion, trapping them outside the device, giving the surrounding security personnel more reaction time, and preventing unnecessary property losses caused by the first-time intrusion of personnel. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.
[0015] Figure 1 is a schematic structural diagram of a safety monitoring device provided by an embodiment of the present invention; Figure 2 is a cross-sectional view of the structure of a safety monitoring device provided by an embodiment of the present invention; Figure 3 is a safety monitoring device provided by an embodiment of the present invention Figure 2 magnified view of the structure of area A therein; Figure 4 is a half-sectional view of the structure of a safety monitoring device provided by an embodiment of the present invention; Figure 5 is a safety monitoring device provided by an embodiment of the present invention Figure 4 magnified view of the structure of area B therein; Figure 6 is a safety monitoring device provided by an embodiment of the present invention Figure 4 magnified view of the structure of area C therein; Figure 7 is a safety monitoring device provided by an embodiment of the present invention Figure 4 magnified view of the structure of area D therein; Figure 8 It is a half-sectional view of a partial structure of a safety monitoring device provided by an embodiment of the present invention; Figure 9 It is a safety monitoring device provided by an embodiment of the present invention Figure 8 and is an enlarged view of the structure in area E; Figure 10 It is a sectional view of a partial structure of a safety monitoring device provided by an embodiment of the present invention; Figure 11 It is a safety monitoring device provided by an embodiment of the present invention Figure 10 and is an enlarged view of the structure in area F.
[0016] In the figure: 1. Fixed seat; 11. Cavity; 12. Driving cavity; 121. Guide frame; 13. Connecting seat; 131. Fixed frame; 132. First limiting frame; 14. Terminal box; 141. Connecting wire; 15. Positioning block; 151. First spring; 152. Bracing plate; 153. Conductive ring; 16. Sliding sleeve; 161. Guide rod; 162. Second spring; 163. Extrusion block; 164. Fixed rod; 165. Fixed plate; 166. Inclined plate; 17. Laser generator; 18. Laser receiver; 19. Alarm; 2. Airbag; 21. Fixed sleeve; 211. Fixed ring; 22. Third spring; 23. Piston rod; 231. Piston piece; 24. Adjusting block; 241. Baffle; 242. Slot; 243. Positioning groove; 3. Positioning component; 31. Limiting frame; 32. Reset block; 33. Limiting block; 331. Fourth spring; 4. Protection component; 41. Slide bar; 411. Slide block; 412. Return spring; 42. Adjusting plate; 421. Top block; 43. Protection plate; 431. Notch; 44. Rotating shaft; 441. Fixed groove; 45. Torsion spring; 46. Adjusting rod; 461. Inclined slot; 462. Insert block. Specific embodiments
[0017] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0018] Example, refer to Figures 1 - 11, a safety monitoring device, comprising a fixed seat 1 and an airbag 2 arranged on the fixed seat 1. The interior of the fixed seat 1 is respectively provided with a cavity 11 and a driving cavity 12. A connecting seat 13 is installed on the side wall of the cavity 11. One end of the connecting seat 13 is installed with a fixing frame 131. The upper end of the fixing frame 131 is installed with a first limiting frame 132. A positioning block 15 is installed on the inner wall of the first limiting frame 132. One end of the positioning block 15 is installed with a pressing plate 152. A conductive ring 153 is installed on one side of the pressing plate 152. A terminal box 14 is installed on the inner wall of the driving cavity 12. A connecting wire 141 is installed on the interface of the terminal box 14. The connecting wire 141 is disconnected at a position close to the pressing plate 152. Laser generators 17 and laser receivers 18 are respectively installed on both sides of the fixed seat 1. An alarm 19 is installed on the side wall of the laser generator 17; The airbag 2 is installed in the upper groove of the fixed seat 1. A fixing sleeve 21 is installed on the inner wall of the airbag 2. A fixing ring 211 is installed on the inner wall of the fixing sleeve 21. A third spring 22 is installed at the upper end of the fixing ring 211. A piston rod 23 is installed on the inner wall of the fixing ring 211. A piston piece 231 is installed at the upper end of the piston rod 23. A regulating block 24 is installed at the lower end of the piston rod 23. A baffle 241 is installed on one side of the regulating block 24.
[0019] Further, the inner wall of the first limiting frame 132 of the fixed seat 1 is slidably connected to the outer wall of the positioning block 15. One end of the inner wall of the positioning block 15 is provided with a first spring 151 fixedly connected to the inner wall of the first limiting frame 132. The disconnected ends of the connecting wire 141 are provided with contact pieces, and the conductive ring 153 conducts the connecting wire 141 by contacting the contact pieces. The terminal box 14 is electrically connected to the laser generator 17, the laser receiver 18, and the alarm 19 respectively. The outer side wall of the airbag 2 is fixedly connected to the inner wall of the fixed seat 1. The two side walls of the third spring 22 are fixedly connected to one side of the fixed ring 211 and the piston piece 231 respectively. The outer wall of the piston rod 23 is slidably connected to the inner wall of the fixed ring 211. The side wall of the adjusting block 24 abuts against one end of the positioning block 15. The bottom end of the cavity 11 is provided with a positioning assembly 3. The positioning assembly 3 includes a limiting frame 31, a reset block 32, and a limiting block 33. One end of the two limiting frames 31 is fixedly connected to the side wall of the connecting seat 13 and the inner wall of the cavity 11 respectively. The inner wall of the limiting frame 31 is slidably connected to the outer wall of the reset block 32. One end of the inner wall of the reset block 32 is provided with a fourth spring 331 fixedly connected to the inner wall of the limiting frame 31. The two outer side walls of the adjusting block 24 are provided with positioning grooves 243 inserted with the limiting blocks 33. The bottom end of the adjusting block 24 is provided with a slot 242. The inner wall of the slot 242 is slidably connected to a sliding sleeve 16. The inner wall of the sliding sleeve 16 is provided with a guide rod 161 slidably connected to the inner wall of the cavity 11. The outer wall of the guide rod 161 is sleeved with a second spring 162. The two side walls of the second spring 162 are fixedly connected to the top inner wall of the sliding sleeve 16 and the bottom end of the cavity 11 respectively. The side wall of the sliding sleeve 16 is fixedly connected with symmetric fixing rods 164. One end of the fixing rod 164 is provided with a fixing plate 165. The side wall of the fixing plate 165 is fixedly connected with symmetric inclined plates 166. The upper inclined surface of the inclined plate 166 abuts against and slides on the side wall of the limiting block 33; It should be noted that: the fixing base 1 is buried in the ground, ensuring that the laser generators 17 and laser receivers 18 on both sides are exposed to the outside, and at the same time, the top of the airbag 2 is filled with high-pressure gas, and its upper end surface is higher than the horizontal plane, which can be covered and hidden by a carpet. When a person breaks in illegally, he will step on the airbag 2 when passing by, so that the air pressure inside the airbag 2 increases, so that the high-pressure gas presses against the piston sheet 231 on the inner wall of the fixing sleeve 21 to move the piston rod 23 and the adjusting block 24 below downward. During the downward movement of the adjusting block 24, it presses against the positioning block 15 on one side to move outward until one end of the adjusting block presses against the conductive ring 153 on the plate 152 and respectively presses against the connecting wire 141. The contact pieces at both ends of the disconnection are in contact, and the entire connection line 141 is connected at this time. The terminal box 14 sends an alarm signal to the laser monitoring component. At the same time, if the laser monitoring component detects that someone is passing by, a feedback signal is given to the terminal box 14. At this time, the terminal box 14 receives the signal to determine that both the airbag 2 and the laser detection component are triggered, and then sends a signal to control the alarm 19 to sound and light alarm, reminding the security personnel to control and persuade the intruder to leave. When the laser detection component and the airbag 2 are both triggered separately, no alarm is issued to avoid the dust particles in the air from affecting the laser detection, thereby avoiding the false triggering of the laser detection component and improving the overall measurement accuracy; In the initial state, one end of the reset block 32 is fixedly abutted against a narrower side wall of the inclined plate 166. When the adjusting rod 46 is squeezed and moved downward, the side wall of the inclined plate 166 slowly moves downward on the side wall of the reset block 32. At the same time, the slot 242 at the lower end of the adjusting block 24 abuts against the sliding sleeve 16 to squeeze the second spring 162 inside and move downward until the bottom end of the sliding sleeve 16 and the inner wall of the cavity 11 are squeezed out. At this time, the side wall of the inclined plate 166 just breaks away from the side wall of the reset block 32. Under the restoring force of the fourth spring 331, the reset block 32 drives one The side limit block 33 quickly moves to one side of the adjustment block 24 until the limit block 33 is inserted into the positioning groove 243, thereby completing the fixation of the position of the adjustment block 24. At this time, the contact piece of the connecting line 141 and the conductive ring 153 on the positioning block 15 maintain contact and connection, thereby ensuring that the alarm 19 can be triggered until the security personnel actively release it. The long-triggered alarm component effectively avoids the problem that the security personnel cannot quickly determine the position due to a short-term alarm, improves the accuracy of the alarm position positioning, and can quickly check the location of illegal intrusion.
[0020] Furthermore, a protection component 4 is installed in the cavity 11 and the driving cavity 12. The protection component 4 includes a sliding rod 41, an adjusting plate 42, a protection plate 43, a rotating shaft 44, a torsion spring 45, an adjusting rod 46 and an inserting block 462. The bottom end of the sliding rod 41 is fixedly connected to a sliding block 411 that is slidably connected to the inner wall of the cavity 11. A return spring 412 that is fixedly connected to the inner wall of the cavity 11 is installed inside the sliding block 411. A squeezing block 163 that abuts against one end of the sliding rod 41 is fixedly connected to the side wall of the sliding sleeve 16. One end of the sliding rod 41 is fixedly connected to one end of the adjusting plate 42. A notch 431 is formed at one end of the protection plate 43. One end of the rotating shaft 44 is fixedly connected to the notch 431. The outer wall of the rotating shaft 44 is rotatably connected to the inner wall of the fixed seat 1 close to the driving cavity 12. The torsion spring 45 is sleeved outside the rotating shaft 44. The side walls of both ends of the torsion spring 45 are respectively fixedly connected to the upper end of the notch 431 and the outer wall of the fixed seat 1. A fixing groove 441 is formed at the bottom end of the rotating shaft 44. A guiding frame 121 is installed on the side wall of the driving cavity 12. The inner wall of the guiding frame 121 is slidably connected to the outer wall of the adjusting rod 46. An inclined groove 461 is formed at the bottom end of the adjusting rod 46. A top block 421 that abuts against and slides in the inclined groove 461 is installed at one end of the adjusting plate 42. An inserting block 462 that is inserted into the fixing groove 441 is installed at the upper end of the adjusting rod 46.
[0021] It should be noted that: during the process of the adjusting rod 46 being squeezed and moving downward, the squeezing block 163 on the side wall of the sliding sleeve 16 moves downward to squeeze the sliding rod 41, so that the sliding block 411 at its lower end squeezes the return spring 412 and slides outward. At the same time, the adjusting plate 42 at one end slides simultaneously, and the top block 421 at one end thereof squeezes the inclined groove 461 formed at the lower end of the adjusting rod 46, so that the whole adjusting rod 46 moves downward along the inner wall of the guiding frame 121, and the inserting block 462 at the upper end disengages from the fixing groove 441. At this time, the rotation of the rotating shaft 44 is released, and under the restoring force of the torsion spring 45, it rotates quickly and returns to the initial state, making the protection plate 43 rotate to be horizontal with the fixed seat 1, thereby blocking the illegally intruding personnel, increasing the difficulty of intrusion, trapping them outside the device, giving the surrounding security personnel more reaction time, and avoiding unnecessary property losses caused by the intrusion of personnel in the first place.
[0022] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A safety monitoring device, comprising a fixed seat (1) and an airbag (2) arranged on the fixed seat (1), characterized in that, The interior of the fixed seat (1) is respectively provided with a cavity (11) and a drive cavity (12). A connection seat (13) is installed on the side wall of the cavity (11). One end of the connection seat (13) is installed with a fixed frame (131). The upper end of the fixed frame (131) is installed with a first limit frame (132). A positioning block (15) is installed on the inner wall of the first limit frame (132). One end of the positioning block (15) is installed with a pressing plate (152). A conductive ring (153) is installed on one side of the pressing plate (152). A terminal box (14) is installed on the inner wall of the drive cavity (12). A connecting wire (141) is installed at the interface of the terminal box (14). The connecting wire (141) is disconnected at a position close to the pressing plate (152). Laser generators (17) and laser receivers (18) are respectively installed on both sides of the fixed seat (1). An alarm (19) is installed on the side wall of the laser generator (17); The airbag (2) is installed in the upper groove of the fixed seat (1). A fixed sleeve (21) is installed on the inner wall of the airbag (2). A fixed ring (211) is installed on the inner wall of the fixed sleeve (21). A third spring (22) is installed at the upper end of the fixed ring (211). A piston rod (23) is installed on the inner wall of the fixed ring (211). A piston piece (231) is installed at the upper end of the piston rod (23). An adjusting block (24) is installed at the lower end of the piston rod (23). A baffle (241) is installed on one side of the adjusting block (24).
2. The safety monitoring device according to claim 1, wherein, The inner wall of the first limit frame (132) of the fixed seat (1) is slidably connected to the outer wall of the positioning block (15). A first spring (151) fixedly connected to the inner wall of the first limit frame (132) is installed on the inner wall of one end of the positioning block (15). Contact pieces are installed at the two disconnected ends of the connecting wire (141). The conductive ring (153) conducts the connecting wire (141) by contacting the contact pieces. The terminal box (14) is electrically connected to the laser generator (17), the laser receiver (18), and the alarm (19) respectively.
3. The safety monitoring device according to claim 2, characterized in that, The outer side wall of the airbag (2) is fixedly connected to the inner wall of the fixed seat (1). The two side walls of the third spring (22) are respectively fixedly connected to one side of the fixed ring (211) and the piston piece (231). The outer wall of the piston rod (23) is slidably connected to the inner wall of the fixed ring (211). The side wall of the adjusting block (24) abuts against one end of the positioning block (15).
4. The safety monitoring device according to claim 1, wherein, A positioning assembly (3) is installed at the bottom end of the cavity (11). The positioning assembly (3) includes a limit frame (31), a reset block (32), and a limit block (33). One end of the two limit frames (31) is respectively fixedly connected to the side wall of the connection seat (13) and the inner wall of the cavity (11). The inner wall of the limit frame (31) is slidably connected to the outer wall of the reset block (32). A fourth spring (331) fixedly connected to the inner wall of the limit frame (31) is installed on the inner wall of one end of the reset block (32).
5. A safety monitoring device according to claim 4, wherein On both outer walls of the adjustment block (24), positioning grooves (243) for inserting the limit blocks (33) are provided. At the bottom end of the adjustment block (24), a slot (242) is provided. A sliding sleeve (16) is slidably connected to the inner wall of the slot (242). A guiding rod (161) slidably connected to the inner wall of the cavity (11) is installed on the inner wall of the sliding sleeve (16). A second spring (162) is sleeved on the outer wall of the guiding rod (161). The two end side walls of the second spring (162) are fixedly connected to the top inner wall of the sliding sleeve (16) and the bottom end of the cavity (11) respectively.
6. The safety monitoring device according to claim 5, wherein Symmetric fixing rods (164) are fixedly connected to the side wall of the sliding sleeve (16). A fixing plate (165) is installed at one end of the fixing rod (164). Symmetric inclined plates (166) are fixedly connected to the side wall of the fixing plate (165). The upper inclined surface of the inclined plate (166) is in contact with and slides against the side wall of the limit block (33).
7. The safety monitoring device according to claim 6, characterized in that, A protection component (4) is installed in the cavity (11) and the driving cavity (12). The protection component (4) includes a sliding rod (41), an adjusting plate (42), a protection plate (43), a rotating shaft (44), a torsion spring (45), an adjusting rod (46) and an inserting block (462). The bottom end of the sliding rod (41) is fixedly connected to a slider (411) slidably connected to the inner wall of the cavity (11). A return spring (412) fixedly connected to the inner wall of the cavity (11) is installed on the inner wall of the slider (411).
8. A safety monitoring device according to claim 7, wherein, An extrusion block (163) in contact with one end of the sliding rod (41) is fixedly connected to the side wall of the sliding sleeve (16). One end of the sliding rod (41) is fixedly connected to one end of the adjusting plate (42). A notch (431) is provided at one end of the protection plate (43). One end of the rotating shaft (44) is fixedly connected to the notch (431). The outer wall of the rotating shaft (44) is rotatably connected to the inner wall of the fixed seat (1) close to the driving cavity (12). The torsion spring (45) is sleeved outside the rotating shaft (44). The two end side walls of the torsion spring (45) are fixedly connected to the upper end of the notch (431) and the outer wall of the fixed seat (1) respectively. A fixing groove (441) is provided at the bottom end of the rotating shaft (44).
9. The safety monitoring device according to claim 8, characterized in that, A guiding frame (121) is installed on the side wall of the driving cavity (12). The inner wall of the guiding frame (121) is slidably connected to the outer wall of the adjusting rod (46). An inclined groove (461) is provided at the bottom end of the adjusting rod (46). A top block (421) in contact with and sliding against the inclined groove (461) is installed at one end of the adjusting plate (42). An inserting block (462) inserted into the fixing groove (441) is installed at the upper end of the adjusting rod (46).