73results about How to "Personal Safety Protection" patented technology

The invention discloses a dynamic positioning monitoring method and system based on speech recognition. The method comprises the steps of obtaining current position data through real-time positioning; inputting a speech signal, and performing preprocessing to obtain a speech digital signal; performing feature parameter extraction based on a linear prediction cepstrum coefficient (LPCC) on the speech digital signal, and obtaining speech signal parameters; building a speech template base composed of target sound templates; constructing an artificial neural network model, judging whether abnormity exists or not on the basis of recognition of speech feature parameters obtained through the built speech template base, and generating and sending a control signal when it is determined that abnormity exists; according to the control signal, sending the current position data. The system comprises a GPS module, a speech sensing module, a control module and a GSM module. The input speech signal can be recognized and judged, whether the danger condition exists or not is judged, the current position data of the user obtained through positioning can be sent for the first time, and monitoring real-time performance and accuracy are improved.

The invention discloses a grinding method for a thin wall guide tube with a tungsten carbide coating and particularly relates to the grinding method for the thin wall guide tube with the tungsten carbide coating and a fixture. According to the grinding method for the fixture, the fixture is ground by operating a grinding machine, and the positioning accuracy of workpieces is improved; according tothe grinding method for the thin wall guide tube with the tungsten carbide coating, grinding machining process parameters are confirmed on base of the grinding technical requirements for the outer outline (an outer circle, a transition circle angle, an end face and an end face chamfer) of the thin wall guide tube with the tungsten carbide coating, and grinding process control is performed on theouter outline of the thin wall guide tube with the tungsten carbide coating; by means of the grinding method for the thin wall guide tube with the tungsten carbide coating and the fixture, the fact that the grinding machine, the fixture, a grinding wheel and the workpieces form a complete process system in grinding is realized, in this way, occurrence of the coating grinding quality problem of aluminum alloy sleeve type thin-wall parts of some type is completely eradicated, and the long-term practice test is performed, the qualified rate of the parts is increased, and the grinding method for the thin wall guide tube with the tungsten carbide coating and the fixture has reference significance in guiding production.

The invention relates to a high-altitude falling protection device comprising a three-axis acceleration sensor, a main control circuit, an ignition drive circuit, an igniter, a gas generator and an airbag, wherein the three-axis acceleration sensor detects an acceleration and transmits an acceleration signal to the main control circuit; the main control circuit receives the acceleration signal and sends an ignition enable signal to the ignition drive circuit; the ignition drive circuit receives the ignition enable signal and conveys driving electric power to the igniter; the igniter is built in the gas generator and can explode an ignitor in the gas generator; the gas generator is filled with the ignitor and a gas producing agent, and an outlet of the gas generator is communicated with the airbag; and the airbag comprises more than one safe air bag, the safe air bags are folded and frizzled in a knapsack, and an air bag popup opening for the popup of the safe air bags is formed in the knapsack. The high-altitude falling protection device provided by the invention has the advantages of simple structure and convenience in use, and can effectively reduce the damage caused by high-altitude falling and ensure the safety of high-altitude operation personnel.

The invention relates to the technical field of ship fittings, in particular to an anti-collision device for a stem of a park yacht based on non-Newtonian fluid. The anti-collision device solves the problem that an existing anti-collision device for a stem of a yacht is not high in protection. The anti-collision device comprises a fixing frame, wherein the fixing frame is in an arc shape, a positioning pin is fixedly connected to the middle portion of the inner side of the fixing frame, an anti-skid pad is fixedly connected to the inner side of the fixing frame, a protective bag is fixedly connected to the outer side of the fixing frame, and the inner portion of the protective bag is filled with the non-Newtonian fluid. According to the anti-collision device, when the stem of the yacht isimpacted, the non-Newtonian liquid shows the characteristics of being as strong as steel under the instant impact, the anti-collision performance of the anti-collision device is maintained, a certaindegree of protection is brought to the personal safety of the yacht, and the damage to the stem caused by the impact is reduced.

The invention belongs to the technical field of cast iron pipe corrosion prevention, and particularly discloses a nodular cast iron pipe outer surface anti-corrosion treatment technology. An oil coating device used in the nodular cast iron pipe outer surface anti-corrosion treatment technology comprises a base plate. An installation frame is fixed to the top end of the base plate, a push rod motoris fixed to the top end of the installation frame, and a push disc is installed at the output shaft end of the push rod motor in a rotating mode. A rectangular plate is fixed to the top end of the base plate, and a circular through hole is formed in the side wall of the rectangular plate. A rotating ring is installed on the side, facing the push rod motor, of the rectangular plate in a rotating mode, and steel wire brushes are fixed to the inner side wall of the rotating ring at equal intervals in the circumferential direction of the rotating ring. According to the nodular cast iron pipe outer surface anti-corrosion treatment technology, a protective oil layer coats the surface of a cast iron pipe which is subjected to rust removal treatment, a membrane is wound around the surface of thecast iron pipe, the surface of the cast iron pipe can be isolated from the air, and therefore the problem that rust is generated on the surface of the cast iron pipe again in the storage or transportation process is prevented from happening, and then the effect and the efficiency of cast iron pipe outer surface corrosion prevention are improved.

The invention relates to a safety seat cabin, which comprises a seat with a backrest and a seat cushion, and a safety cabin, wherein the seat is arranged in the safety cabin, the connection mode between the seat and the safety cabin is a dismountable installation mode, and the safety cabin is provided with a cabin door which can be opened and closed, and an emergency button used for controlling the opening and the closing of the cabin door. The safety seat cabin not only can resist damage on the human body due to severe collision in various traffic accidents, but also can effectively resist the damage caused by explosion and high temperature on the human body, thereby further protecting the safety of passengers, and the invention has strong practicability and good application prospects.

The invention is suitable for the technical field of computers, and provides a wearable device based safety reminding method. The wearable device based safety reminding method comprises the steps of obtaining the current position of a wearable device user; judging whether the current position is within a preset safety region; when the current position is not located in the preset safety region, detecting the motion of the wearable device user; when detecting that the motion is the preset squatting motion, obtaining the squatting duration of the wearable device user; when the squatting duration of the wearable device user is beyond a preset squatting duration threshold, reminding the wearable device user through a preset reminding mode. Therefore, the safety hazard of the user when squatting in an unsafe region is reduced efficiently, and the user safety is protected efficiently.

The invention discloses a method used for preparing a solid-solid phase change material by polyethylene glycol / terylene physical blending, and belongs to the field of functional polymer synthetic technology. According to the method, 60 to 95 weight parts of polyethylene glycol and 40 to 5 weight parts of terylene are taken as raw materials, and are mixed according to charging sequence at a certain temperature with stirring so as to realize physical blending; and then the mixture is subjected to shock cooling, pumping filtration, and vacuum drying so as to connect polyethylene glycol and terylene via hydrogen bonds and intermolecular forces, and obtain the polyethylene glycol / terylene physically blended solid-solid phase change material. The method comprises following steps: drying and dissolving of the raw materials; dropwise adding of polyethylene glycol into terylene solution at a certain temperature; physical blending for a certain time at a certain temperature with stirring; immersion cooling and washing; pumping filtration; vacuum drying; obtaining of milk white particles of the solid-solid phase change material; and performance test.

The invention discloses a movable rack body tilting prevention device comprising an electronic horizontal tilt angle sensor and an electric control component which are arranged at the top of a rack body, wherein a rack body chassis is provided with a screw rod motor; a screw rod of the screw rod motor is provided with a sleeve; the sleeve is provided with a tilting-prevention hook; the electronic horizontal tilt angle sensor is electrically connected with the electric control component; the electric control component is electrically connected with the lead screw motor; the tilting-prevention hook is capable of hooking or releasing a track at the lower part of the chassis by virtue of up-and-down movement of the screw rod sleeve on the motor. The movable rack body tilting prevention device has the advantages of being reliable and practical in structure and simple and rapid in installation, ensuring the safety and stability in operation of the rack body and better protecting the personal safety of an operator.

The invention provides a calculating method of the rotary speed of a fan in a power battery for a hybrid electric vehicle. A fan with LFm shift is adopted, wherein m is an integer from 0-7, and the larger the m value is, the higher the shift of the fan is; at a certain moment, firstly, the comprehensive fan shift at the moment is obtained according to the temperature change of a battery pack in a vehicle; the maximum fan shift corresponding to the vehicle speed at the moment is obtained according to different vehicle speeds; then, the minimum value in the comprehensive fan shift and the maximum fan shift corresponding to the vehicle speed is taken as the last fan shift at the moment; finally, the duty ratio relationship of the last fan shift and the pulse width modulating wave is converted into corresponding duty ratio of the pulse width modulating wave, and the rotation speed of the fan at the moment can be controlled by controlling a fan operation control port. According to the method, the rotation speed of the fan can be dynamically controlled.

The invention discloses automatic gas nail assembling equipment with high safety performance. The automatic gas nail assembling equipment comprises a pressure-bearing support, electric hydraulic rodsare fixedly installed at the top ends in grooves, a pressure sensor is fixedly installed on the upper surface of a supporting frame, a photoelectric protector is fixedly installed on the upper surfaceof a working table top, a collecting groove is formed at one side, close to of a storage tank, of the upper surface of the working table top, and a discharging tank is fixedly connected to the lowersurface of the colleting groove. Through the photoelectric protector, when the automatic gas nail assembling equipment operates normally, the personal safety of operators can be effectively protected;through the collecting groove, the discharging tank and a receiving box, assembled gas nails can be collected; and through the electric hydraulic rods, the normal working stability of the automatic gas nail assembling equipment can be further improved on the premise of not affecting normal moving of the automatic gas nail assembling equipment.

The invention relates to an earthquake fire indoor risk-avoidance self-rescue device and a method thereof which can provide a risk-avoidance self-rescue chance for people who are trapped in a house and are difficult to escape when in a heavy earthquake or a fire disaster. The device and the method comprise an arc-shaped steel plate which has a rotary fan, a storage device and an upright column atboth sides, and an arc-shaped steel plate which has a rotary fan at one side, and a pothook, an upright column and a protection fastener at the other side; a steel pipe which has a screw hole in the middle and a steel column inserted into each end penetrates the arc-shaped steel plate; another steel column and the arc-shaped steel plate which has a rotary fan at one side, and a pothook and a protection fastener at the other side constitute a risk-avoidance space which can be stretched and retracted; the device and the method are provided with a battery, a light bulb, an alarm, a high-pressurepump, etc. When heavy earthquake happens, a steel ball and a spring, a steel wire and a vibrator cause the light to turn on due to the shake, and lead the alarm to give an alarm and to stretch the risk-avoidance space, then people can avoid risk, survive by water, food and paper, and can realize self-rescue by using the high-pressure pump to remove the steel column after enter the risk-avoidance space; when in a fire disaster, people can use water and respirator to protect the body and escape after entering the risk-avoidance space. The device and the method solve the problem that people can not escape and are smashed or burned to death since the houses are ruined and knocked down in a heavy earthquake and a fire disaster, which can be widely used for the human body safety protection in the house when in the heavy earthquake and the fire disaster.

The invention relates to a high-altitude fall protection device, which includes a three-axis acceleration sensor, a main control circuit, an ignition drive circuit, an igniter, a gas generator and a safety airbag, wherein the three-axis acceleration sensor detects acceleration and transmits the acceleration signal to the main engine. Control circuit; the main control circuit receives the acceleration signal and sends the ignition enable signal to the ignition drive circuit; the ignition drive circuit receives the ignition enable signal and sends drive power to the igniter; the igniter is built into the gas generator and can detonate the gas generator The ignition agent in the gas generator; the gas generator is filled with the ignition agent and the gas generating agent, and the outlet of the gas generator is connected with the safety air bag; the safety air bag includes more than one safety air bag, each safety air bag is folded and curled in a backpack, and the backpack is opened There are air bag ejection openings for each air bag ejection. The invention has the advantages of simple structure and convenient use, can effectively reduce the damage caused by falling from high altitudes, and guarantee the safety of personnel working at high altitudes.

The invention discloses a lifting device for mining with high stability. The lifting device for the mining comprises a base, a lifting frame is fixedly arranged on the upper surface of the base, and asupporting stabilizing piece is connected to the position, close to the lifting frame, of the outer part of the base in a sleeved mode, a lifting air cylinder is fixedly installed inside the liftingframe, and a supporting platform is fixedly connected to the top end of the lifting frame; and a protective assembly is fixedly installed at the position, close to the edge, of the upper surface of the supporting platform. According to the lifting device, the supporting stabilizing piece is arranged, so that the phenomenon that the lifting device shakes in the using process is avoided, and the stability of the supporting platform is improved; the protective assembly is arranged, the height of a cross rod assembly can be adjusted, so that the phenomenon that a user falls off and leaves the supporting platform is avoided; a sliding assembly is arranged, when the supporting platform is used, the user can conveniently convey mining materials through the supporting platform and a sliding plate,an additional supporting plate does not need to be additionally arranged, and the conveying of the mining materials is facilitated.

The invention relates to an apartment bed, in particular to an apartment bed capable of protecting personal safety in an earthquake. The apartment bed capable of protecting the personal safety in theearthquake can resist collapse of buildings, and has a nutrition supply function when people are trapped by the buildings. The apartment bed capable of protecting personal safety in the earthquake comprises a protective frame, wherein a ladder is mounted on one side of the protective frame; a lifting mechanism mounted on the protective frame and used for driving people to move; and a linkage mechanism mounted on the protective frame, matched with the lifting mechanism and used for limiting the lifting mechanism. The linkage mechanism is disconnected with a circuit, the linkage mechanism stopslimiting the lifting mechanism, the lifting mechanism moves downwards to drive people into the protective frame under the action of gravity, meanwhile, the lifting mechanism moves downwards to make contact with the linkage mechanism, and the lifting mechanism drives the linkage mechanism to operate to limit the protection frame, so that personal safety can be protected during the earthquake.

The invention provides a deodorization method in ester synthesis. The deodorization method in the ester synthesis is characterized by the following steps that S1, synthetic action of polyglycerol ester is carried out in a reaction kettle by adopting a temperature-gradient method; S2, at the end of the action, the vacuum degree in the reaction kettle is adjusted to -0.06-0.099MPa; and S3, air exhaust is carried out, specifically, air exhaust is carried out through an air rising pipe and parts of materials are recycled, in the S3, unpleasant odor is removed through a tower plate group arranged in the air rising pipe. The deodorization method in the ester synthesis solves the problem of the unpleasant odor generated in the production process of the polyglycerol ester, protects the environmentand human body personnel safety to a certain extent; and solves the problem of object cyclic utilization of distillation distilled off in the synthesis process of the polyglycerol ester, and reducesthe water supply volume and discharging of water.

The invention provides an emergency sheltering mechanism for a seat with a pressed roof and a using method thereof. The emergency sheltering mechanism for the seat with the pressed roof comprises an automobile, a seat, a plurality of active sliding mechanisms and a pressure sensor. The multiple driving sliding mechanisms are all arranged in the automobile. The multiple pressure sensors are all arranged at the top of the automobile, and the seat is arranged on the driving sliding mechanism. The driving sliding mechanism comprises a driving mechanism, a shell and a movable base. According to theemergency sheltering mechanism for the seat with the pressed roof and the using method thereof, through cooperation of the arranged automobile, the seat, the multiple active sliding mechanisms and the pressure sensors,when heavy objects such as steel rails or wood falling from the roof of an automobile due to rollover of a truck suddenly fall down, people can effectively topple over, and then thesitting posture of people is changed into lying down. The head of the person originally close to the roof is far away from the roof. The personal safety of personnel is protected.

The invention discloses an automatic platform cover plate opening and closing device of a wind turbine generator tower frame, a system and a method, and belongs to the field of auxiliary equipment of wind turbine generators. The automatic platform cover plate opening and closing device comprises a platform cover plate, a drive device and a monitor device. The drive device is used for driving the platform cover plate to be opened and closed. The monitor device comprises a controller and proximity detectors connected with the controller. The proximity detectors are fixed to the inner wall of the tower frame and used for monitoring operating tendency data of a climbing-free device. The controller is used for judging the operating tendency of the climbing-free device according to the monitored operating data of the climbing-free device and used for controlling the drive device to achieve automatic opening and closing of the platform cover plate according to the judgment result. According to the automatic platform cover plate opening and closing device of the wind turbine generator tower frame, the system and the method, the car body position of the climbing-free device can be monitored and judged through the monitor device, automatic opening and closing of the platform cover plate are controlled according to judgment, and the personal safety risk is reduced.

The present invention provides an improved engine-driven generator which can normally alarm or / and shut down an engine when CO concentration exceeds a standard, and also shut down the engine when a COalarm is removed. The improved engine-driven generator comprises an engine; and the CO alarm which is connected with the engine ignition device and used for detecting the CO concentration in the environment near the engine, generating a signal according to the CO concentration change and sending the signal to the ignition device so as to control the ignition device to ignite, wherein the CO alarmis arranged to send out a flameout signal to enable the ignition device not to ignite when the detected CO concentration is larger than or equal to the preset concentration, or, when the signal transmission is interrupted, the ignition device does not ignite. Based on the same purpose, the invention also provides a control method of the engine-driven generator and also provides the CO alarm.

The invention discloses an improving method and a bell-mouthed type air ventilation structure of an air vent of a down-hole plane gate. A section of bell mouth is formed in the lower end face of a door lintel between lintel separation plates of a gate to serve as an air ventilation port. The lower end face of each section of bell mouth is flush with, welded and fixed to a lintel bottom plate. A round hole in the upper end of each section of bell mouth is directly connected with a round perpendicular steel pipe pre-buried in first stage concrete to form a bell-mouthed type air vent. The top endof the round perpendicular steel pipe is located at the top of a gate well and connected with a bulb type air ventilation cover through a flange, and round air vents are formed in the bulb type air ventilation cover. The top end of the round perpendicular steel pipe communicates with the outer edge of the downstream position of a vertical well through a bending pipe with the bending angle being larger than or equal to 90 degrees. According to the bell-mouthed type air ventilation structure, the lintel section can be inflated or deflated, occurrence of the phenomena that the gate vibrates andthe lintel section is cavitated is reduced, and guarantee of safe operation of the gate is facilitated.

The embodiments of the invention provide a measurement system and a measurement method.The measurement system comprises a control module and a light leakage detection module connected with the controlmodule; the light leakage detection module is used for performing light leakage detection on a to-be-tested device and sending detected light leakage data to the control module; the control module isused forcontrolling the light leakage detecting module to work and receiving the light leakage data sent by the light leakage detection module. According to themeasurement system and the measurementmethod,the automatic test is realized, the accuracy of the test is high, and the test efficiency is high.

The invention relates to an engine bin built-in type fire extinguishing device. The engine bin built-in type fire extinguishing device is composed of a fire extinguisher steel cylinder in an engine bin and a fire extinguisher starting handle in a driving bin; the fire extinguisher steel cylinder in the engine bin is fastened onto the bin wall by a bridle; and a locking valve pin of a first extinguisher valve of the fire extinguisher steel cylinder penetrates through the bin wall through a pull wire and is connected with the fire extinguisher starting handle arranged in a driving chamber. The fire extinguisher valve is installed on the top of the fire extinguisher steel cylinder; when the locking valve pin is pulled out by the fire extinguisher starting handle in the driving bin through thepull wire, a starting spring jacks up a valve rod, and a valve plug is pulled to move up into a valve body above a spray nozzle. According to the engine bin built-in type fire extinguishing device, when a fire disaster in the automobile engine bin is put out, it is not needed to open an automobile engine bin cover, personnel are not needed to get close to a fire source for operation, and injuriesto the personnel are reduced; and meanwhile using and operating steps are simple, a fire extinguisher can be fast started within short time, and the fire extinguishing effect is good.

The invention discloses an automatic opening-closing platform cover plate device of a wind generation set tower and a system and control method of an automatic opening-closing platform cover plate device, and belongs to the field of auxiliary equipment for a wind generation set. The automatic opening-closing platform cover plate device comprises a platform cover plate, a driving device and a monitoring device, wherein the driving device is used for driving the platform cover plate to be opened and closed; the monitoring device comprises a controller, a proximity sensor and a safety sensor, the proximity sensor and the safety sensor are connected with the controller, fixed to the inner wall of the tower and used for monitoring the running data of a climb-free device, the running data of the proximity sensor is used for judging whether to conduct the automatic opening or closing of the platform cover plate or not, the safety sensor is used for judging whether the climb-free device is within a safe range or not, the controller judges the running tendency of the climb-free device according to the running data of the climb-free device, and the controller controls the driving device to achieve the automatic opening or closing of the platform cover plate according to the judging result. By means of the automatic opening-closing platform cover plate device of the wind generation set tower, the body position of the climb-free device can be monitored and judged through the monitoring device, and the automatic opening or closing of the platform cover plate is controlled according to the judgment, so that the personal safety risk is reduced.

The invention belongs to the high voltage line field technology field and especially relates to an electrician high-voltage line walking device. The device comprises a first supporting plate and a second supporting plate. A mica layer is fixedly installed at a top of the first supporting plate. By using the electrician high-voltage line walking device, a second walking device is arranged on an upper surface of the second supporting plate, and the second walking device includes a third function cabinet and a fourth function cabinet. A bottom of the third function cabinet is fixedly connected with the upper surface of the second supporting plate, and the bottom of the fourth function cabinet is fixedly connected with the upper surface of the second supporting plate so that an effect that thesecond walking device divides pressure for a first walking device when a professional is overweight in a using process of the device is achieved. A problem that when the professional uses the deviceto inspect a high-voltage line, the first walking device is only arranged so that if the first walking device is damaged, personal safety of the professional cannot be effectively protected is solved.

The invention provides an interior design companion ladder used for an assembly building. The ladder comprises a left fixing rack, a right fixing rack and a bottom rack, the left fixing rack and the right fixing rack are arranged at the left end and the right end of the bottom rack respectively and are perpendicular to the bottom rack separately, the bottom rack is of a frame-shaped structure, theleft end and the right end of the bottom rack are each provided with a protruding fixing part, the left fixing rack and the right fixing rack are fixedly connected with the fixing parts respectivelythrough screws, and vertical slide ways are arranged on the opposite sides of the left fixing rack and the right fixing rack respectively. The interior design companion ladder is simple in structure and convenient to operate, and allows workers to ascend or descend to take tools conveniently.

The invention discloses an automatic open-close platform cover plate device of wind turbine generator tower and a system and a control method thereof, which belongs to the field of generating set auxiliary equipment. The automatic open-close platform cover plate device comprises a platform cover plate, a driving device and a monitoring device, wherein the driving device is used for driving the open and close of the platform cover plate and comprises a driving motor, a driving shaft and a driving shaft sleeve matched with the driving shaft, the platform cover plate realizes open and close under the drive of the driving motor, the driving device also comprises a support plate for supporting the driving shaft and the platform cover plate, and a damping hinged plate is arranged at the connection site of the support plate and the platform cover plate; and the monitoring device comprises a controller and a proximity transducer connected with the controller, the proximity transducer is used for monitoring the running data of a climb free device, the controller is used for judging the running trend of the climb free device and controlling the automatic open and close of the platform cover plate according to the judgment results. The automatic open-close platform cover plate device disclosed by the invention monitors and judges the position of the climb free device through the monitoring device, and controls the automatic open and close of the platform cover plate according to the judgment, so as to reduce the personal safety risk.

The invention relates to an estimation method and system for the torque of a brake of an elevator traction machine. The estimation method comprises the following steps: when an elevator enters the sleep state and is in a preset brake detection cycle, entering a brake detection mode, and controlling the brake to hold tightly; driving an elevator inverter to apply preset driving torque to the elevator traction machine; collecting slide pulse numbers sent by an encoder of the elevator traction machine in real time, and obtaining the output current value of the elevator inverter; according to the slide pulse numbers and the output current value collected in the period of time of applying the preset driving torque, calculating the size of the torque of the brake; when the obtained torque of the brake is smaller than the rated torque of the brake, controlling the elevator to stop running or generating a warning fault report. For the condition that the torque of the brake is not enough, the method reports the fault and prompts and informs the elevator maintenance personnel to repair the elevator brake, therefore effectively protecting the safety of passegers.

The invention discloses an automobile bumper device with an expansion function. The device comprises a bumper (1) and two bumper expansion components (2), and the two bumper expansion components are respectively mounted at two ends of the bumper; a trigger part is arranged on the bumper expansion assembly and located in front of the bumper, and when the trigger part moves towards the bumper under the action of an external force, the bumper expansion assembly can expand in the extension direction of the end of the bumper; and an expansion locking mechanism is further arranged between the bumper expansion assembly and the bumper, and when the bumper expansion assembly is expanded to the extending direction of the bumper, the expansion locking mechanism can lock the bumper expansion assembly and the bumper and combine the bumper expansion assembly and the bumper into a whole. The bumper device can be expanded when collision occurs so that the collision force is greatly dispersed, the damage of collision impact to the whole structure of the vehicle is reduced, and the personal safety of a driver and passengers in a compartment is fully protected.

The invention provides a safety pin anti-falling device, and belongs to the field of tobacco processing mechanical equipment. The safety pin anti-falling device is used for preventing a safety pin from loosening, falling, being lost and the like in the working vibration process. The safety pin anti-falling device comprises a safety pin, a connecting plate and a U-shaped spring stretcher. The U-shaped spring stretcher comprises a U-shaped support, a spring and a telescopic rod, mounting holes are symmetrically formed in the vertical faces of the two sides of the U-shaped support, the telescopicrod penetrates through the mounting holes, the end of the telescopic rod is fixed to the upper end of the connecting plate located on one side of the U-shaped support, the telescopic rod is sleeved with the spring, the spring is arranged in the U-shaped support, and a circular hole used for installing the safety pin is formed in the lower end of the connecting plate. According to the device, theproblems of personnel potential safety hazards, economic losses and the like caused by abnormity of the safety pin are solved, and the normal service life of the safety pin is prolonged.