73 results about "Rescue agent" patented technology

A hypothermia insulative cap is provided enhanced with a GPS-enabled LED strip for emergencies, constructed from dual-layer nylon and neoprene with advanced seam technologies for durability and comfort. It features a unique technology chassis for waterproofing essential electronics, a battery-activated GPS and LED for increased visibility, and a protective brow visor for comfort and protection. This cap is designed to maintain body temperature during waterborne rescues, offering increased visibility to rescuers and compatibility with conventional life vests, without impeding the function of either device.

The invention discloses an air-ground integrated medical rescue command and decision support method and system. The method comprises the following steps: constructing and operating a high-fidelity rescue simulation environment; in the multi-agent decision center, obtaining a global rescue situation state and local observation of each rescue agent; based on a global rescue situation state and local observation of each rescue agent, a strategy is generated for each type of rescue agent through a trained hybrid decision engine, a combined action instruction is output, and the combined action instruction is issued to the corresponding rescue agent in the high-fidelity rescue simulation environment to be executed. Driving an environment state to transfer, and obtaining a composite reward including a team reward and an individual reward; and carrying out iterative optimization on strategies in the multi-agent decision center based on environmental state transition and composite rewards. The strategy can be dynamically adjusted, the overall benefit of the team is considered, and the final strategy tends to be globally better.

Techniques for administering therapy and monitoring a subject based on communication between medical devices are described. An example method includes customizing, by a medical device, alarms (e.g., setting alarm priority and / or thresholds) of the medical device based on communication from a rescuer device. In some instances, the medical device determines (e.g., infers) a characteristic (e.g., medical condition) of a rescuer based on treatment data of the rescuer in an emergency scene, and customizes alarms suitable for the rescuer's condition.

The utility model discloses a movable disaster-prevention escape door in tunnel, which comprises a door frame, a circular turntable and a telescopic door, wherein the door frame is discoid, the outer side of the door frame is provided with a protective panel, the protective panel is provided with symmetrical lower carry and upper carry, the circular turntable is rotatably arranged on the door frame and is provided with a door opening, the telescopic door is rotatably connected in the door opening and comprises a rotating section, an intermediate telescopic section and a bottom telescopic section, the intermediate telescopic section is arranged in the rotating section, and the bottom telescopic section is arranged in the intermediate telescopic section. By rotating the circular turntable, the position of the telescopic door is adjusted to a position with smaller blockage or less external obstruction, the trapped personnel can operate according to the instructions of the rescuers, synchronous rescue inside and outside is realized, rescue time is saved when breaking the door, and the telescopic door is rotatably telescopic, so that the operation personnel can quickly complete the door closing operation by entering the moving frame when disaster occurs.

To provide an AED aid that protects the privacy of injured or ill individuals, thereby reducing the psychological resistance of rescuers, and that can be used with AEDs installed in any location (indoors or outdoors), as well as an AED set that includes this AED aid. [Solution] The AED assist device 10 is an AED assist device used on an injured person when using an AED, and comprises: a bottom portion 100 on which the injured person's head can be placed and which prevents the AED assist device from moving when the head is placed on it; a tent portion 200 which covers the head so that the face of the injured person cannot be seen from the surroundings when the head is placed on the bottom portion; an opening 300 which allows the face of the injured person to be seen by a rescuer when the head is placed on the bottom portion; and one or more ventilation portions 202 which are provided in a position where the face of the injured person cannot be seen from the surroundings of the tent portion and which allow air to circulate.

The utility model discloses a lifesaving position indicating floating belt, and relates to the technical field of lifesaving articles. According to the technical scheme, the fixing belt is characterized by comprising a belt body, a metal sheet is fixedly connected to the belt body, a connecting rope is fixedly connected to one end of the belt body, an air cavity is formed in the belt body, an air inlet pipe communicated with the air cavity is fixedly connected to the side, close to the connecting rope, of the belt body, and a sealing cover is detachably connected to an air inlet of the air inlet pipe; a first reactant is arranged in the air inlet pipe, a second reactant which reacts with the first reactant to form gas is arranged in the air cavity, and after the sealing cover is separated from the air inlet pipe, the first reactant makes contact with the second reactant. And rescue workers can quickly find and implement rescue.

The embodiment of the utility model discloses simple testing equipment for a positive pressure type air respirator, and relates to the technical field of emergency rescue equipment. The shape of the front surface of the simple testing equipment for the positive pressure type air respirator is matched with the shape of a mask valve body arranged on an air exhalation mask, so that the front surface of the simple testing equipment for the positive pressure type air respirator is butted with the mask valve body of the air exhalation mask; a pressure testing module, a power supply module, a master control module and a communication module are further installed in the simple testing equipment for the positive pressure type air respirator. The simple testing equipment for the positive pressure type air respirator provided by the embodiment of the utility model is extremely simple in structure, easy to use and low in manufacturing cost, and is convenient for on-site rescue workers to quickly test the pressure in the mask.

An emergency rescue device for an elevator car includes a device shell arranged on an upper portion of the elevator car, a device interlayer in the device shell, an emergency power supply arranged in the device interlayer, a control module arranged in the device interlayer, an environment detection mechanism in signal connection with the control module, a communication module connected with the control module, a ventilation mechanism arranged in the device interlayer, and a storage box arranged on a top portion of the car, the storage box being provided with a hinged door, a bolt being penetrated through the hinged door, and an electromagnet being connected with the bolt. In a time interval between interruption of normal power supply and connection of the emergency power supply, the electromagnet loses magnetic force due to power-off, and then the sleeve and the bolt drop, so that the hinged door is automatically opened without limitation. The electromagnet can also be remotely controlled to be powered off, so that a rescuer remotely opens the storage box. When the electromagnet cannot be powered off, the bolt is separated from the sleeve by rotating a rotating handle, and then the hinged door is manually opened.

The utility model relates to the technical field of sports safety, in particular to an anti-drowning armlet which comprises a wearing assembly, an inflation assembly, a monitoring assembly and an early warning assembly. A monitoring assembly for monitoring the motion condition of a user and the surrounding environment is installed on the side, close to the user, in the wearing assembly, and an early warning assembly for early warning is installed on the surface of the outer side of the wearing assembly. Through mutual cooperation of the wearing assembly, the inflation assembly, the monitoring assembly and the early warning assembly, when too many factors possibly causing drowning exist in the swimming process of a user, the user can keep away from the drowning factors by himself or herself or call others to help keep away from the drowning factors through early safety warning, drowning events are avoided as much as possible, and the safety of the user is improved. In addition, once an actual drowning event occurs, the air bag can be automatically popped up to emerge from the water surface, and the fluorescent tracer agent is used for tracing the drowning event to a rescued person to find the drowning event.

This invention relates to a wearable equipotential monitoring and alarm device for flood rescue, belonging to the field of emergency rescue equipment technology. The device includes at least four limb conductive straps and a head conductive electrode, as well as a control module and an equipotential short-circuit module. The control module monitors the potential at multiple points, including the limbs and head, in real time. When the potential difference between any two points exceeds a safety threshold, an alarm is triggered, and a relay in the equipotential short-circuit module closes, short-circuiting all monitoring points to achieve equipotential protection for the human body. The device also employs waterproof quick-connect terminals, and the control box uses an IP68 waterproof structure, ensuring the device's waterproof performance in immersion environments. Thus, this invention features optimized dynamic short-circuit logic and a full-condition waterproof design, balancing continuous protection, real-time monitoring, and environmental adaptability. It effectively prevents rescuers from electric shock due to potential differences in floodwater, significantly improving the safety of rescue operations.

To better support the rescuer's movements during cardiopulmonary resuscitation. [Solution] In the AED1, the detection unit 134 detects the patient's body movement during the CPR period after electrocardiogram analysis and discharge processing. The output control unit 131 outputs instructions to the rescuer regarding chest compressions based on whether or not the patient's body movement is present during the CPR period. The output control unit 131 also outputs a continuation instruction D1 to instruct the continuation of chest compressions, and outputs the continuation instruction D1 again when a first time has elapsed since the previous output of the continuation instruction D1. Furthermore, if the patient's body movement is not detected for a period of time shorter than the first time, the output control unit 131 outputs a start instruction D2 to instruct the start of chest compressions with priority over the continuation instruction D1, and outputs the start instruction D2 again when the second time has elapsed.

The invention discloses a medical material air-drop box for field first aid, and belongs to the technical field of medical air-drop boxes. The medical air-drop box comprises a medical air-drop box body, and supporting legs are arranged on the two sides of the body and connected with the side walls of the body through buffering assemblies. A smoke chamber and a colored ribbon storage box are fixed at the top of the body and are respectively provided with a smoke outlet and a colored ribbon outlet, and a smoke release component with a laser lamp and a showing component are correspondingly arranged in the smoke chamber and the colored ribbon storage box. The air-drop box is characterized in that the air-drop box is provided with a smoke, colored ribbon and laser triple positioning system; a heating rod in the smoke box vaporizes smoke oil to generate high-concentration smoke, and the high-concentration smoke is accelerated and guided out by a second fan blade to form a remote visible smoke column; a first fan blade in the colored ribbon storage box blows out a colored ribbon to form a dynamic identifier; the laser lamp penetrates through the smoke to form a high-brightness light column. The three parts cooperate with each other, are positioned by smoke and colored ribbons in the daytime, are positioned by laser and smoke at night, and are positioned by light pillar penetration in a low-visibility environment, so that search time can be shortened for rescue workers, and the rescue workers are prevented from missing first-aid golden time.

The utility model provides an intelligent drowning prevention vest which comprises a vest body, a warning mechanism, a heat preservation mechanism and a positioning mechanism, the warning mechanism is installed on the vest body and used for providing signals for rescuers, the positioning mechanism is installed on the vest body and used for sending position signals to the rescuers, and the heat preservation mechanism is installed on the vest body and used for sending position signals to the rescuers. The thermometer is mounted in the vest body and used for keeping the body temperature of a drowning person; by the adoption of the technical scheme, rescue warning is provided through the positioning mechanism, position signals are sent to rescue workers through the positioning mechanism, accurate rescue is facilitated, the temperature of a person falling into water can be kept through the heat preservation mechanism, the rescue possibility of the person falling into water is improved, and therefore a user can effectively call for help and conduct self rescue.

A system for assisting a rescuer in providing resuscitative treatment to a victim is described. The system includes a motion sensor configured to generate motion sensor signals that are indicative of motion of the chest of the victim during chest compressions, an input device configured to receive user input indicative of a type of chest compressions, an output device, and a processor, a memory, and associated circuitry, the processor communicatively coupled to the motion sensor, the input device, and the output device and is configured to receive the motion sensor signals and the user input indicative of the type of chest compressions, determine chest compression feedback for the rescuer based on the motion sensor signals, and control the output device to selectively provide the chest compression feedback for the rescuer based at least in part on the type of chest compressions indicated by the user input.

The utility model relates to the technical field of fire rescue tools, in particular to a multifunctional rescue auxiliary device for fixing a windowsill. The multifunctional rescue auxiliary device for fixing the windowsill comprises a supporting square pipe, an abutting square pipe is inserted into the supporting square pipe, and L-shaped plates are installed at the bottom of the supporting square pipe and the top of the abutting square pipe; and a locking part is mounted at a pipe opening in the top of the supporting square pipe. According to the multifunctional rescue auxiliary device for fixing the windowsill, the supporting square tube and the abutting square tube form a telescopic rod structure, the abutting square tube which slides out of the supporting square tube rapidly and outwards is locked and unlocked through the locking component, and after the supporting square tube and the abutting square tube are fixed to the windowsill, the supporting square tube and the abutting square tube are locked and unlocked. The height of the sliding pipe is adjusted along the supporting square pipe according to the actually needed height, then the guide wheel is buckled to the lug piece through the lock catch, and then rescue workers can throw rescue ropes to the downstairs through the guide wheel, so that fire-fighting tools can be rapidly hoisted or the rescue workers can be lowered to the downstairs.

The utility model relates to the technical field of fire rescue, in particular to a portable pneumatic metal cutter which comprises a high-pressure gas cylinder, a pneumatic air grinding pen and a gas conveying hose, a storage box used for storing the pneumatic air grinding pen and the gas conveying hose is detachably installed at the upper end of the high-pressure gas cylinder, and a box cover is rotatably installed at the upper end of the storage box. A control valve is installed at the right end of the high-pressure gas cylinder, a gas-pressure meter is installed at the right end of the control valve, and the front end of the control valve communicates with a gas outlet solenoid. According to the pneumatic metal cutter, the pneumatic metal cutter is composed of the high-pressure gas cylinder, the storage box, the pneumatic air grinding pen and the gas conveying hose, the metal cutter of the structure is reasonable in overall layout and compact in structure, rescue workers can conveniently carry the metal cutter for rescue, meanwhile, the rescue workers can control cutting operation of the pneumatic air grinding pen through one-hand operation, and the cutting efficiency is improved. And the workload and difficulty of cutting rescue are effectively reduced, so that the convenience and efficiency of actual cutting rescue are improved.

The present invention relates to a rescue unit (1) for persons (4) to be rescued and / or for rescuers, preferably for wounded persons (4) and / or for paramedics, comprising a frame (10) with a chassis (11) by which the rescue unit (1) can be moved on a surface (2), and a protective cell (13) which encloses a protected interior space at least substantially and is designed to accommodate at least the persons (4) to be rescued and / or the paramedic, wherein the rescue unit (1) is designed such that the protective cell (13) can be lowered relative to the frame (10) at least along the vertical axis (Z) onto the surface (2) and raised from the surface (2), wherein the protective cell (13) is designed to completely close a floor surface of the interior space in the raised state and to open the floor surface of the interior space sectionally relative to the surface (2) in the lowered state.

The invention discloses combined air breathing equipment and a using method thereof. The air breathing equipment comprises a breathing mask, and the side face of the breathing mask is connected with an air inlet back plate through a corrugated air guide pipe; a filtering device is arranged at the input end of the air inlet back plate, and an air supply fan is arranged in the air inlet back plate; the compressed air bottle is arranged on the back side of the air inlet back plate; a control valve, an air supply valve and an air path valve which are used for controlling output of the compressed air bottle are arranged on the oxygen supply branch and the oxygen supply branch and located at the corrugated air guide pipe, a control circuit board is arranged at the air path valve, and the control circuit board is electrically connected with the air supply valve, the air path valve, the control valve of the compressed air bottle and the air supply fan through linkage wires. Therefore, synchronous switching and interlocking of three oxygen supply modes, namely a PAPR mode, an APR mode and an SCBA mode, are realized. By means of the linkage design of the air supply valve and the air path valve, rescue workers can complete switching from air bottle oxygen supply to canister oxygen supply within two seconds, and the response speed is greatly increased.

The invention provides a positive pressure type air respirator wearing device. The positive pressure type air respirator wearing device comprises a back plate, annular paws, a back supporting cushion and a waistband rotating assembly. Wherein the annular paw and the back supporting pad are fixed to the front side and the rear side of the back plate respectively, and the waistband rotating assemblies are installed on the left side and the right side of the back plate through hinges respectively and connected with the second buckle through the waistband. According to the gas cylinder fixing device, gas cylinders of different sizes are fixed through cooperation of the first adjusting positioning holes, the annular paws, the limiting belts and the first buckles, and the problem that stability is poor due to shaking of the gas cylinders is solved. Meanwhile, by adopting a structure installation mode of combining double-side back supporting cushions conforming to the curve shape of the waist and back of the human body with flexible damping balls and second adjusting positioning holes, the extrusion and impact of a positive pressure type air respirator on the back of the human body are avoided, meanwhile, the use of people with different heights is met, the physical output of rescue workers is effectively reduced, and the rescue efficiency is improved. And the comfort requirement of rescue workers is met.

The utility model relates to the technical field of fire rescue auxiliary tools, in particular to a novel honeycomb removing device which comprises a multi-stage telescopic rod with the hollow middle, a gas pipe arranged in the telescopic rod and an ignition mechanism connected with the gas pipe and detachably arranged at the top of the telescopic rod. The anti-bending base is arranged at the bottom of the telescopic rod, a through hole allowing a gas pipe to pass through is formed in the middle of the anti-bending base, and the multifunctional knife is detachably arranged at the top of the telescopic rod. The multifunctional knife is T-shaped; the multifunctional knife comprises a knife handle detachably connected with the telescopic rod and a double-edge blade arranged at the top of the knife handle. The device has the advantages of being simple in structure, wide in application range, convenient and fast to use and the like, single-person operation can be achieved, the labor intensity of rescue workers is reduced, more time and labor are saved, and safety is higher.

The application relates to the technical field of mine safety, and particularly discloses a temporary supporting rescue equipment for rock burst rescue and a supporting method, which comprises a portable mechanical jacking device, the jacking device can be positioned by a slit as an internal supporting point, and a pulley is arranged on the jacking device; an outer support, the outer support can be fixed to a roadway as an external supporting point, a first winding drum and a second winding drum are rotationally connected to the outer support, the first winding drum is driven by a driving motor arranged on the outer support, winding gears are coaxially fixed on the first winding drum and the second winding drum, the second winding drum is slidably arranged on the outer support, and a locking structure is arranged on the second winding drum to control the meshing and separation of the two winding gears; a transmission cable, a first end of the transmission cable is connected with the first winding drum, and a second end of the transmission cable is connected with the second winding drum after passing through the pulley. The temporary supporting equipment can solve the problem that the weight of the temporary supporting support in the prior art is too large, the rescue personnel are inconvenient to carry, and it is difficult to quickly reach the designated position for temporary supporting.

This utility model relates to a smart fire hydrant. The technical problem this utility model aims to solve is to provide a smart fire hydrant. The technical solution adopted by this smart fire hydrant includes: a fire hydrant body, a fire hydrant seat, a water inlet bend, an indicating and driving block, a pre-tensioning spring, an observation glass, and a driving block locking sleeve. The indicating and driving block includes a driving block actuating part, a driving block counterweight part, and a driving block connecting part connecting the bottom of the driving block actuating part and the driving block counterweight part. An indicating part is provided on the outside of the driving block actuating part, and the indicating part has two water indicators of the same height: one indicating no water and the other indicating water. The advantages of this smart fire hydrant are: real-time water level visualization is achieved through the position status of the indicating and driving block, allowing rescuers to determine the fire hydrant's water supply status within 3 seconds, thus improving emergency response efficiency.

The invention provides an inflatable fire rescue support for quickly constructing an emergency channel, and belongs to the technical field of inflatable fire rescue supports, the inflatable fire rescue support comprises a base, a mounting and dismounting mechanism is arranged on the base, an inflation frame is arranged on the mounting and dismounting mechanism, an inflation mechanism is arranged on the inflation frame, the mounting and dismounting mechanism comprises a positioning groove, a box body and a positioning block, and the positioning block is arranged in the box body. The positioning groove is formed in the base, the box body is fixedly installed at one end of the base, the positioning block is inserted into the positioning groove, and the inflation frame is fixedly installed on the positioning block. According to the inflatable fire rescue bracket, the mounting and dismounting mechanism is arranged, so that the quick mounting and dismounting functions of the inflatable bracket are realized, the portability and deployment efficiency of the inflatable fire rescue bracket are remarkably improved, and rescue workers can complete the assembly of the bracket in a short time on site without tools.

The application provides a method for cognitive evaluation and intervention of rescue personnel under brain signal and physiological load regulation, and belongs to the field of cognitive evaluation. The method comprises the following steps: collecting brain function signals and peripheral physiological signals of rescue personnel during a task and extracting corresponding features; constructing multiple cognitive state indexes based on the brain function features and constructing a physiological load index based on the peripheral physiological features; taking the physiological load index as a regulation factor, mapping it into a regulation factor, combining a preset regulation sensitivity coefficient of each cognitive dimension, correcting the cognitive state indexes, and obtaining corrected cognitive state indexes; comparing the corrected cognitive state indexes with a preset threshold to determine whether each cognitive dimension is in an abnormal state; and generating an intervention strategy according to the determination result and executing the intervention strategy by dynamically adjusting the output mode of task information. In this way, the non-specific interference of physiological signals on cognitive evaluation is effectively isolated, and appropriate intervention is performed according to the evaluation result.

The invention relates to a bench with a lifesaving function, and belongs to the technical field of rescue. The bench is detachably provided with a plurality of transverse rods, the transverse rods are connected through threads, when a person falling into water needs to be rescued, rescue workers can carry out rescue by connecting the transverse rods to form a rescue rod, in addition, due to the fact that the bench is fixed to the ground through the supporting part, the rescue workers can be prevented from slipping and falling by means of friction force of the bench, and the rescue work efficiency is improved. The danger risk is reduced, and the rescue safety is improved. In addition, the cross rod is fixed in the bench through the fixing piece, the fixing piece is connected with the bench through the lock catch structure and the hinge, the cross rod can be quickly opened and taken out, meanwhile, the fixing piece can be connected to the bench, and the fixing piece is prevented from being lost. Therefore, the bench has the functions of daily rest and rescue, and is simple to operate and practical.

An automatic external defibrillator is used for conducting electrocardiogram analysis and discharge processing on a detected person. The automated external defibrillator includes a detection unit configured to detect a body movement of a subject during a cardio-pulmonary resuscitation period after electrocardiogram analysis and discharge processing, and an output controller configured to output an instruction regarding chest compression on the subject to a rescuer based on the presence or absence of the body movement of the subject during the cardio-pulmonary resuscitation period. An output controller configured to output a continuation instruction for instructing continuation of the chest compression, and to output the continuation instruction again in a case where a first time has elapsed from the last output of the continuation instruction; a start command output unit that outputs a start command for instructing the start of chest compression over the continuation command when the body movement of the subject is not detected continuously for a second time or longer shorter than the first time; and outputting the start command again when a second time has elapsed from the last output of the start command.

The utility model is applicable to the technical field of blank caps, and provides an inflatable blank cap for a water hose, which comprises a water hose body and a conversion connecting pipe arranged at the end part of the water hose body, the other end of the conversion connecting pipe is provided with a clamping type female connecting pipe in a clamping manner, and the other end of the clamping type female connecting pipe is provided with a clamping type male connecting pipe in a clamping manner; the other end of the clamping type male connecting pipe is in threaded connection with a plugging blank cap, the outer end of the plugging blank cap is in threaded connection with an inflation part, and a hanging ring is arranged on the surface of the plugging blank cap. According to the inflation blank cap for the water hose, after the external air expiration tank connecting pipe is in butt joint with an inflation valve, the inner cavity of the water hose body can be rapidly inflated, after the water hose body is inflated and the hanging rope is connected with the hanging ring in a hanging mode, rescue workers can lower the inflated water hose into a water area needing to be intercepted, and persons in distress can grab the water hose body; after the water hose body is inflated, the area is large, grabbing is convenient, and people in distress can be well supported by large buoyancy.

1. Name of the product in this design: Defibrillator (M2). 2. Purpose of this design: To assist rescuers in resuscitating patients experiencing cardiac arrest. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key features: the front view.

The invention discloses a safe transportation stretcher suitable for a field complex environment, and relates to the technical field of stretchers, the safe transportation stretcher comprises a telescopic device, the telescopic device comprises a frame, a supporting rod is fixedly installed on the surface of the frame, a first threaded groove is formed in the surface of the supporting rod, an adjusting pipe is arranged on the surface of the supporting rod, and a first threaded groove is formed in the surface of the adjusting pipe; the adjusting pipe is connected with the supporting rods through threads, the two frames and the two supporting rods are symmetrically distributed with the adjusting pipe as the center, and grips are rotationally installed at the ends, close to the supporting rods, of the two frames; according to the safe transportation stretcher, the supporting rods on the two sides can move oppositely through the first threaded grooves between the supporting rods, then the face width of the whole stretcher is increased, the situation that a wounded patient is tied to the stretcher by a clamping belt due to the insufficient face width is avoided, meanwhile, rescue workers can effectively and conveniently carry the stretcher when the stretcher is not unfolded, and the situation that rescue is not timely in the complex field environment is avoided; and the rescue efficiency of wounds and patients is improved.

The present application relates to the technical field of rescue stretcher, and discloses a multifunctional high-stability emergency rescue intelligent stretcher, which comprises a stretcher, a reinforcing plate is fixedly connected to the surface of the stretcher, a handle is fixedly connected to the end of the reinforcing plate, a recess is formed in the end of the stretcher, a back strap is fixedly connected to the inner wall of the recess, a positioning groove is formed in the top of the stretcher, and an intelligent life monitoring device is arranged on the inner wall bottom of the positioning groove. When the stretcher needs to be moved, the rescuer lifts up the stretcher by the handle and carries it; when the stretcher needs to be moved on the road, the electric push rod is started to move downward, the circular hole frame is pushed downward by the extrusion plate when the electric push rod moves downward, the circular hole frame rotates downward on the surface of the cylindrical frame when the circular hole frame moves downward, the elastic frame is driven to rotate downward by the rotating rod when the cylindrical frame rotates downward, the universal wheel is in contact with the road surface after the bottom of the cylindrical frame drops, at this time, the stretcher can be pushed to move on the road surface, and the stretcher is supported by the elastic frame.