Carrying type turnover air cushion stretcher

Abstract

This invention discloses a load-bearing, tilting air cushion stretcher, comprising upper and lower airtight layers, a sandwich load-bearing structure formed by a vertical traction wire array, and a load-bearing area formed by inflation. The head and foot ends of the air cushion stretcher are provided with rigid end inserts encapsulated between the airtight layers. Inside the weld seam, a reinforcing band fixing area, an end force-bearing connection, a non-inflatable main load-bearing strap, an end-densified vertical traction wire array, and a density-gradient transition area are sequentially arranged to form an end load-bearing band. The load input from the end force-bearing connection is transferred to the load-bearing area via the end load-bearing band, bypassing the airtight weld seam area. In some embodiments, the air cushion stretcher is provided with an edge-stabilizing air chamber and a secondary load-bearing limiting band to assist in providing end posture constraints and end displacement restrictions under abnormal working conditions during tilting.

Description

Technical Field

[0001] This invention relates to the field of medical care and patient transport auxiliary equipment technology, and in particular to a load-bearing tilting air cushion stretcher that can be used in conjunction with an external tilting device, which can be configured with an end support belt, an end stabilizing section and a secondary support limiting belt. Background Technology

[0002] In clinical settings such as burn units, intensive care units, anesthesia resuscitation, and emergency departments, patients are often placed on existing beds such as regular hospital beds, suspended beds, or operating tables. Due to extensive burns, sedation, coma, or severe pain, they are often unable to actively cooperate with changes in position. When performing regular turning or prone positioning treatment on such patients, the turning process involves not only changing the position but also the safe management of wound pressure, skin cutting, and various tubes such as airways, drainage systems, and vascular access.

[0003] When staffing allows, clinical practice often involves multiple nurses pulling the patient with a sheet or lifting them with coordinated effort to turn them over. However, this method makes it difficult to control the force and displacement simultaneously, which can easily lead to uncontrollable posture, increased skin shear displacement, and risks such as tubing traction. Furthermore, relevant nursing guidelines and equipment instructions emphasize the need to check tubing fixation and allow sufficient slack before turning the patient to accommodate axial rotation and displacement during the process, highlighting the importance of tubing safety management for turning procedures.

[0004] To reduce the labor intensity and risks of manual turning, existing technologies have proposed solutions such as integrated rotating turning beds or prone ventilation turning beds. These beds achieve the conversion between supine and prone positions by rotating the bed frame or bed board assembly around a longitudinal axis, and are equipped with fixing straps, tubing management, and angle locking structures. However, such devices are usually dedicated integrated beds or dedicated bed board systems, requiring patients to be placed on these devices for turning. In scenarios such as ordinary hospital beds, suspended beds, or operating beds, transfer steps such as getting on and off the bed or transferring between beds are often still required, thus increasing the workload and risks of secondary handling.

[0005] On the other hand, to avoid transferring patients to a dedicated turning bed, existing in-bed airbag turning mattresses or turning air cushions use the inflation and deflation of airbags on one side or in sections to create an inclined surface, thereby achieving side-lying or a certain angle of body position adjustment. This type of solution is effective in achieving side-turning care, but it is usually difficult to simultaneously meet the requirements of controlled turning around the long axis of the bed, stable load-bearing during the turning process, and reliable load transfer under end-connection conditions, without the patient leaving the original bed.

[0006] Other inflatable transport or lifting pads have straps, reinforcing strips, or connectors along their edges to facilitate patient transport or lifting. While these solutions can improve handling convenience to some extent, when the end docks with an external flipping device and bears concentrated loads input along the length of the air cushion, the load may still enter the air cushion body through the weld area or local membrane area, potentially causing end peeling, free edge folding, or end instability.

[0007] Therefore, there is still a need for a load-bearing, tilting air cushion stretcher that can be placed under a patient in a deflated state, form a load-bearing platform after inflation, and transfer the main load around the gas-tight weld area during end docking and tilting stress conditions; this air cushion stretcher can further provide auxiliary restraint on the end load-bearing band during tilting and abnormal conditions through the cooperation of the end stabilizing section and the secondary bearing limiting band. Summary of the Invention

[0008] Technical problems to be solved In view of the problem that existing inflatable transfer pads, turning air pads or inflatable lifting pads tend to apply concentrated loads to the gas-tight weld area when docking with the external turning device at the end, which may lead to end peeling, edge folding and posture instability, the present invention aims to provide a load-bearing turning air pad stretcher to maintain a more stable load transfer path when used in conjunction with an external turning device.

[0009] The objective of this invention is to allow the air cushion stretcher to be placed under the patient in the deflated state and to form a load-bearing platform after inflation, while simultaneously constructing a continuous load transfer path from the end force-bearing connection to the load-bearing area, so that the end docking load is transferred around the gas-tight weld area; the end stability of the initial flipping section and the end displacement restriction under abnormal working conditions can be further improved by the end stabilizing section and the secondary bearing limit band.

[0010] Technical solution To address the aforementioned technical problems, the present invention provides a load-bearing, tilting air cushion stretcher. The air cushion stretcher includes upper and lower airtight layers, a vertical traction wire array, and at least one central load-bearing air chamber. Rigid end inserts encapsulated within the airtight layers are provided at the head and foot ends of the air cushion stretcher. The rigid end inserts, along with the weld inner reinforcing strip fixing area, the end force-bearing connection portion, the non-inflatable main load-bearing strap, the end densified vertical traction wire array, and the subsequent density gradient transition area, continuously form an end load-bearing band in the length direction. In some embodiments, the edge stabilizing air chamber forms an end stabilizing section at at least one end of the head or foot end that partially overlaps with or connects to the end load-bearing band.

[0011] The end force-bearing connection part is provided with corresponding holes for forming a double shearing butt with the opposite ear plates of the external flipping device; the corresponding holes are located within the projection range of the rigid end insert in the top view projection and at least partially overlap with the non-pneumatic main load-bearing strap and the strip-shaped high-density load-bearing area, so that the input load bypasses the gas-tight welding seam area and is transferred to the load-bearing area.

[0012] The edge stabilizing air chamber is provided with an independent valve port or valve group, and an end stabilizing section is formed at at least one of the head end and foot end; when the mating is flipped, the end stabilizing section can form a limiting fit with the end bearing band.

[0013] A secondary bearing limiting band is provided between the end force-bearing connection and the rigid end insert or non-inflatable main load-bearing strap. The secondary bearing limiting band maintains a reserved slack and is in a non-load-bearing state under normal inflation conditions, so as to limit further displacement of the end force-bearing connection when the inflation pressure decreases or the end is abnormally displaced.

[0014] Beneficial effects Based on the above technical solution, the present invention has at least the following beneficial effects: 1) Through the continuous cooperation of the rigid end insert, the inner reinforcing strip fixed area of ​​the weld, the non-air-filled main load-bearing pull strip, the strip-shaped high-density load-bearing area and the flared load diffusion area and the density gradient transition area in the end densified vertical traction wire array in the length direction, the input load can be transmitted along the end load-bearing strip, which helps to reduce the risk of end peeling, weld stress concentration and local stiffness abrupt change.

[0015] 2) By partially overlapping or connecting the end stabilizing section with the end bearing strip, and by independently filling and deflating the edge stabilizing air chamber, the upward tilting of the free edge and the relative displacement of the end during the flipping process can be constrained, which is beneficial to improving the end attitude stability and the consistency of load transfer.

[0016] 3) Through the sandwich structure that can be inserted when deflated and can be carried when inflated, and the projection alignment relationship between the corresponding holes and the main load path, the air cushion stretcher can be conveniently arranged at the bedside and easily connected to the external turning device.

[0017] 4) By cooperating with the secondary bearing limit band and the end bearing band, an auxiliary limiting path can be formed when the inflation pressure decreases or the end is abnormally displaced, which helps to reduce the risk of abnormal end displacement continuing to act on the weld zone. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the external tilting device used in conjunction with a load-bearing tilting air cushion stretcher in one embodiment of the present invention, in a straddling bed state; Figure 2 yes Figure 1A schematic diagram of the overall structure of the external flipping device in the flipped state; Figure 3 yes Figure 1 Front view of the external flipping device shown; Figure 4 yes Figure 1 Top view of the external flipping device shown; Figure 5 This is a partial structural diagram of an embodiment of the present invention, showing that the end force-bearing connection part and the external flipping device form a double shearing butt with the two ear plates opposite each other, and are cooperated by a secondary bearing limiting band and a rigid end insert or a non-inflatable main bearing pull band. Figure 6 yes Figure 1 Left view of the external flipping device in its flipped state; Figure 7 This is a top view of a load-bearing tilting air cushion stretcher in one embodiment of the present invention; Figure 8 yes Figure 7 The partial longitudinal sectional view at point AA shows the relative positional relationships of the rigid end insert, the hermetically sealed weld area, the reinforcing strip fixed area, the non-air-filled main load-bearing strap, the strip-shaped high-density load-bearing area, the flared load diffusion area, the density gradient transition area, the end stabilizing section, and the secondary bearing limiting strip. Figure 9 yes Figure 7 A partial longitudinal section view at point BB; Figure 10 yes Figure 1 The diagram shows the overall structure of the external flipping device with deployable support legs. Figure 11 yes Figure 1 A schematic diagram of the telescopic state of the external flipping device shown. Figure 12 This is a schematic diagram of the control flow, taking the independent inflation and deflation of the edge-stabilized gas chamber as an example in a combined use scenario. Figure 13 This is a signal block diagram of the sensor and controller in a combined application scenario; Figure 14 This is a schematic diagram of the multi-cavity partitions and independent valve ports or valve group connections of a load-bearing tilting air cushion stretcher in one embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures 1: Left side frame; 2: Right side frame; 3: Telescopic longitudinal connecting beam; 4: Transverse connecting beam; 5: Electric lifting mechanism; 6: Rotating shaft; 7: Rotating frame; 71: Ear plate; 72: Pin; 8: Load-bearing tilting air cushion stretcher; 81: Vertical traction wire array; 811: Central load-bearing air chamber; 812: Edge stabilizing air chamber; 82: End load-bearing connection; 83: Rigid end insert; 84: Independent valve port or valve assembly; 85: Hermetically sealed weld area; 86: Reinforcing strip fixing area; 87: Non-pneumatic main load-bearing strap; 88: Strip-shaped high-density load-bearing area; 89: Trumpet-shaped load diffusion area; 90: Density gradient transition area; 91: End stabilizing section; 92: Secondary bearing limiting strip; 93: Corresponding hole position; 9: Air supply module; 10: Controller; 12: Pipeline passage hole or groove; 13: Angle locking mechanism; 15: Rotation drive component; 16: Angle sensor; 17: Lifting height sensor or limit switch; 18: Air cushion pressure sensor; 19: Locking sensor. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the following embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention; those skilled in the art can make conventional changes to the structure, materials, or connection methods without departing from the concept of the present invention. Figures 1 to 6 as well as Figures 10 to 13 The external flipping device and its control process shown are only used to illustrate the application scenarios of the air cushion stretcher of the present invention, and do not constitute the essential technical features claimed by the present invention.

[0021] Terminology Explanation: In this specification, "edge stabilizing air chamber" refers to an air chamber located around the periphery of the central bearing air chamber to assist in providing lateral restraint; "end load-bearing connection" refers to a connecting component located at the end of the air cushion stretcher, used to form a detachable connection with the external turning device and to bear the end input load; "end bearing band" refers to a load-bearing band-shaped area continuously formed along its length by a rigid end insert, a reinforcing band fixing area, a non-inflatable main bearing strap, an end-densified vertical traction wire array, and a subsequent density gradient transition area; "top view projection" refers to a projection perpendicular to the plane containing the upper and lower airtight layers; "rated load" refers to the design load value formed by the sum of the patient's weight and the additional load; "set target pressure" refers to the inflation pressure set for the corresponding air chamber; "rapid depressurization" refers to a state in which the central bearing air chamber or edge stabilizing air chamber experiences a rapid pressure drop during use; "external turning device" refers to a device detachably connected to the end load-bearing connection of the air cushion stretcher of this invention and used to perform turning or lifting actions.

[0022] Example of use with external flipping device like Figures 1 to 6 as well as Figures 10 to 13As shown, the external flipping device that can be used with the air cushion stretcher of the present invention may include left and right frames 1 and 2, a telescopic longitudinal connecting beam 3, a transverse connecting beam 4, an electric lifting mechanism 5, a rotating shaft 6, a rotating frame 7, a rotating drive component 15, an angle locking mechanism 13, and corresponding sensors and controllers 10. This external device is only used to illustrate the application scenario of the present invention, and its specific structure can be selected according to the prior art. This specification does not further limit it.

[0023] Structural Example of the Air Cushion Stretcher of the Present Invention like Figure 8 , Figure 9 As shown, the load-bearing tilting air cushion stretcher 8 includes an air cushion body, a vertical traction wire array 81, and multiple mutually isolated air chambers. Each air chamber includes at least a central load-bearing air chamber 811 and an edge stabilizing air chamber 812. The vertical traction wire array 81 is used to define the inflation thickness and improve in-plane stiffness. Rigid end inserts 83, encapsulated between upper and lower airtight layers, are respectively provided at both ends of the air cushion. A reinforcing band fixing area located inside the end airtight sealing weld area, a non-inflatable main load-bearing strap encapsulated within the airtight layer, and an end load-bearing connection portion 82 are provided in the end stress area. The end-density vertical traction wire array located in the end stress area includes a strip-shaped high-density load-bearing area and a flared load diffusion area, followed by a density gradient transition area. At least one end of the edge stabilizing air chamber at the head or foot ends forms an end stabilizing section that partially overlaps with or connects to the end load-bearing strap, providing lateral restraint to the end load-bearing strap during tilting.

[0024] like Figure 4 , Figure 5 , Figure 8 As shown, the air cushion has end-load-bearing connection parts 82 at both ends, which can be connected to or separated from the docking seat on the external flipping device. In one embodiment, the docking seat has two opposing ear plates, and the end-load-bearing connection parts 82 are located between the two ear plates, with pins or quick-release pins passing through corresponding holes to form a double shear bearing. The corresponding holes are located within the projection range of the rigid end insert 83 in top view and at least partially overlap with the non-inflatable main bearing strap and the strip-shaped high-density bearing area, so that the input load is basically consistent with the main force direction of the end bearing strap. Wear-resistant bushings can be provided at the corresponding holes. One end of the secondary bearing limiting strap can be fixed to the end-load-bearing connection part 82, and the other end can be fixed to the rigid end insert 83 or the non-inflatable main bearing strap, and a slack is reserved in the normal inflation state to limit relative displacement when the inflation pressure decreases or the end is abnormally displaced. An isolation layer or a removable and washable cover can be provided on the outer surface of the air cushion, and pipeline passage holes or grooves 12 can be provided to facilitate pipeline passage.

[0025] Control and process examples when used in conjunction with an external flipping device When used in conjunction with the external tilting device, the air supply module 9 supplies air to the air cushion stretcher 8 and controls the inflation and deflation. The edge stabilizing air chambers can be inflated independently of the central bearing air chamber to ensure that the end stabilizing sections form a limiting fit with the end bearing strip.

[0026] In a usage process, such as Figure 12 As shown, bedside positioning and end docking can be completed first, followed by sequential inflation of the edge stabilizing air chamber and the central bearing air chamber, and then lifting and tilting. After tilting, the chamber should be lowered back to the bed and the connection should be released. If abnormal air chamber pressure, unlocked interface, or rapid drop in inflation pressure is detected, tilting should be stopped and mechanical locking or controlled descent should be performed.

[0027] Specific structure of load-bearing tilting air cushion stretcher The load-bearing, tilting air cushion stretcher 8 of the present invention needs to simultaneously meet the requirements of being able to be placed under the patient in the deflated state, forming a load-bearing platform after inflation, and reliably docking with the external tilting device. To this end, this embodiment can adopt a combination structure of a vertical traction wire array, multiple air chambers, edge-stabilizing air chambers, rigid end inserts encapsulated in an airtight layer, a non-inflatable main load-bearing strap, and an end force-bearing connection part. The end load-bearing strap is formed by a reinforcing band fixing area located inside the weld, a strip-shaped high-density load-bearing area, a flared load diffusion area, and a density gradient transition area, which helps to separate the end sealing function from the end load-bearing function.

[0028] Overall structural layering: The air cushion stretcher 8 may include an upper surface layer, an internal restraint layer, and a lower surface layer; wherein the lower surface may be provided with a low-friction surface to reduce shearing of the skin and bed sheet when inserted from the side of the bed.

[0029] Implementation of vertical traction wire array 81: Vertical traction wire array: Multiple vertical traction wires are arranged between the upper and lower surface layers. The two ends of each traction wire are fixed to the upper and lower surface layers respectively, using methods such as stitching, weaving, or hot-pressing. The traction wire array is distributed in an array along the length and width directions, limiting the inflation thickness, so that the air cushion forms a relatively flat bearing surface after inflation. The density can be measured by the number of connection points per unit projected area or the equivalent number of traction wires. A denser zone is set at the end stress area, connected to the reinforcing strip and the non-inflatable main bearing strap. This denser zone includes a strip-shaped high-density bearing area corresponding to the corresponding hole or the non-inflatable main bearing strap, and a flared load diffusion area that gradually widens from the end to the center bearing area. A density gradient transition zone is set between the denser zone and the center bearing area, so that the density of the vertical traction wires decreases continuously or in stages along the length direction. The lengths of the denser zone and the transition zone can be determined based on the balance between local reinforcement, smooth stiffness transition, and thin insertion.

[0030] End and edge reinforcement mesh: Reinforcement mesh can be set near rigid end inserts.

[0031] Multi-chamber diaphragm and local constraint: The air cushion is divided into multiple air chambers by a diaphragm.

[0032] Multi-chamber partitioning and redundancy: The air cushion body can be a multi-chamber structure, including at least a central support air chamber and edge stabilizing air chambers, such as left and right side stabilizing cavities or continuous annular edge cavities; each air chamber can be independently inflated and deflated and independently valved, such as independent valve ports or valve groups 84, to achieve partitioned support and improve the redundancy of the air chamber arrangement. The edge stabilizing air chambers can be inflated independently of the central support air chamber to form a lateral limiting fit; the edge stabilizing air chambers can form an end stabilizing section at at least one end of the head end or foot end that partially overlaps with or connects to the end support strip to provide limiting during mating and flipping.

[0033] In one embodiment, the edge stabilizing air chambers include two strip-shaped edge stabilizing air chambers located on either side of the central bearing air chamber, so that the air cushion stretcher has at least three mutually isolated air chambers.

[0034] In this invention, the end bearing band is continuously formed by a rigid end insert, a reinforcing band fixing area, a non-pneumatic main bearing pull band, an end densified vertical traction wire array, and a density gradient transition area. Its structural arrangement is conducive to making the main load path avoid the gas-tight welding seam area.

[0035] Pressure control and pressure relief safety: The edge stabilizing air chamber and the center bearing air chamber can be charged and released separately through independent valve ports or valve groups, which is used to make the end stabilizing section form a limiting fit with the end bearing band when the mating is flipped.

[0036] End-load-bearing connection part 82 and related structures: End reinforcement: Rigid end inserts 83 are provided at both ends of the air cushion. The rigid end inserts can be composite plates, thin metal plates, or engineering plastic plates. The rigid end inserts 83 are encapsulated between the upper and lower airtight layers and cooperate with the non-inflatable main load-bearing strap through the reinforcing band fixing area. The reinforcing band fixing area is located inside the end airtight welding seam area and is continuously connected to the end-density vertical traction wire array and the subsequent density gradient transition area of ​​the end stress area, which helps to disperse the concentrated stress at the joint. The end stress connection part 82 is fixed or connected through the rigid end inserts 83 or the non-inflatable main load-bearing strap, thereby helping to reduce the concentrated load directly applied to the airbag membrane weld.

[0037] Quick-release structure: can adopt a pin-type connection and can be equipped with an anti-accidental release mechanism.

[0038] Double shear load: such as Figure 5As shown, the docking seat on the rotating frame 7 can be equipped with two opposing ear plates. The force-bearing connection part at the end of the air cushion is located between the two ear plates. The pin passes through the two ear plates and the force-bearing connection part to form a double shear force, which helps to reduce the bending moment of the pin and improve the load-bearing reliability. The corresponding hole position can be located within the projection range of the rigid end insert 83 in the top view projection. The hole position can be equipped with a wear-resistant bushing. The corresponding hole position can at least partially overlap with the non-inflatable main load-bearing belt and the strip-shaped high-density load-bearing area in the top view projection, so that the main load enters the end load-bearing belt.

[0039] Secondary anti-mis-disengagement and status confirmation: If necessary, an anti-mis-disengagement structure or a locking sensor 19 can be set.

[0040] Force direction: The main force direction of the end force connection 82 should be consistent with the force line of the rotating frame 7, and basically coincide with the force extension direction of the rigid end insert 83, the non-inflatable main load-bearing strap and the reinforcing strap, and basically coincide with the center line of the length direction of the end load-bearing strap, so that the limiting effect formed by the end stable section during the rotation is transmitted along the end load-bearing strap, reducing the risk of torsional peeling load during rotation; if necessary, a flexible transition structure can be set to compensate for assembly errors.

[0041] Insertable design: The air cushion has a thin insertion characteristic when deflated; it can be equipped with a wedge-shaped guide edge, traction strap, or detachable sliding plate to assist in insertion from the side of the bed. For patients who should not be disturbed significantly, the lower plate can be laid out before inflating.

[0042] Pipeline management: The air cushion stretcher 8 can be equipped with pipeline passage holes or grooves 12.

[0043] Materials and processes: The airbag material can be TPU-coated nylon fabric, TPU-coated polyester fabric, or medical-grade composite membrane; the airtight connection can be achieved by high-frequency heat sealing or hot-press welding; the skin contact surface can be made of low-shear fabric or replaceable cover.

[0044] Typical size range: The width, length, inflated thickness, rigid end insert length, density gradient transition zone length, and relative arrangement of the end stabilizing section and end bearing band of the air cushion stretcher 8 can be selected according to the target bedside space, patient size, and bearing requirements.

[0045] For ease of explanation, "free edge tilt height" refers to the maximum vertical distance of the free edge of the air cushion stretcher relative to the adjacent bearing plane, which can be measured by displacement sensors, visual measurement, or gauges; "relative displacement of the end force-bearing connection" refers to the displacement of the center of the corresponding hole of the end force-bearing connection relative to the reference point of the rigid end insert or the reference line of the non-inflatable main bearing strap, which can be obtained by measuring the displacement of the marked point; "90° position offset" refers to the offset of the patient's longitudinal central axis relative to the target reference central axis when flipped to 90°; "rapid pressure relief" refers to the state of rapid pressure drop during use.

[0046] Selection criteria and verification methods for structural relationships The above structural relationships and optional parameters are mainly determined based on the following constraints: the main load should be transferred around the weld zone; the local stiffness at the end should smoothly transition from the butt joint area to the main load-bearing area; during normal inflation, the secondary bearing limit band does not participate in the main load-bearing but restricts further displacement under abnormal working conditions; and during the rotation, the edge stabilizing air chamber forms a limiting fit with the end bearing band.

[0047] The selection of the length, density ratio, and density gradient transition zone of the end-reinforced vertical traction wire array is primarily used to achieve a balance between local reinforcement, smooth stiffness transition, and thin insertion capability. If the end-reinforced length is too short, it may hinder the diffusion of concentrated loads to the main load-bearing area; if it is too long, it may increase the overall stiffness of the end, potentially hindering deflation insertion. A density ratio that is too low may result in insufficient local reinforcement, while a ratio that is too high may affect foldability and manufacturability.

[0048] The ear plate gap of the double shear butt joint, the reserved slack of the secondary bearing limit band, and the overlapping relationship between the top view projection of the corresponding hole position and the rigid end insert, the non-pneumatic main bearing pull band and the strip-shaped high-density bearing area are mainly used to take into account the assembly margin, the centering input of the main load, the non-load under normal working conditions and the restriction of further displacement under abnormal working conditions.

[0049] The inflation and deflation states of the edge stabilizing air chamber and the central bearing air chamber are mainly used to evaluate the structural-operating conditions under which the end stabilizing section and the end bearing band form a limiting fit. The specific settings can be determined by recording the free edge upturn height, the relative displacement of the end-loaded connection, and the edge folding trend under rated load and a set target pressure. For subsequent verification, under the same external dimensions, material system, rated load, and flipping trajectory, the following can be recorded: weld zone peeling, free edge upturn height, relative displacement of the end-loaded connection, pin bending or hole wear, 90° positional offset, and relative displacement limitation after a rapid decrease in inflation pressure. These indicators are used to illustrate the correspondence between structural relationships and force paths.

[0050] In another embodiment, the central air-bearing chamber is divided into a head and neck support zone, a trunk support zone, and a lower limb support zone along the length of the human body. Each zone is equipped with a valve port and a pressure sensor 18. The controller 10 can control the inflation according to the pressure set for each zone, thereby adjusting the local support distribution and facilitating care.

[0051] In another embodiment, the rigid end insert can be integrally formed with the end force-bearing connection part or formed into an integrated connection seat by riveting or screwing; the connection seat can be provided with a metal reinforcing ring, through hole or dovetail groove to form a double shear docking with the two ear plates and pins on the rotating frame, so that the main load during quick-release docking is transmitted to the load-bearing area where the vertical traction wire array 81 is located via the rigid part or the non-pneumatic main load-bearing pull belt along the line of action that is basically coincident with the center line of the length direction of the end load-bearing belt, thereby helping to reduce the peel load at the film weld.

[0052] Interlocking and process description when used with external tilting device When used in conjunction with an external tilting device, the locked state and air chamber pressure can be used as interlock inputs. Tilting is performed only when the end force-bearing connection 82 is locked and the air chamber pressure meets the usage requirements.

[0053] like Figure 12 , Figure 13 , Figure 14 As shown, the coordination process can be carried out in the following order: positioning and locking - connecting the air cushion - inflation - lifting - rotation - falling back - release. During the coordination and flipping process, if the interface is not locked or the inflation pressure drops rapidly, the rotation should be stopped. If necessary, the relative displacement should be limited by the secondary bearing limit belt before a controllable fall can be implemented.

[0054] Industrial applicability This invention can be used in burn units, intensive care units, anesthesia resuscitation, emergency departments, and other scenarios where patients who cannot actively cooperate need to be turned, transported, or assisted in positioning. It can be used as an independent air cushion stretcher or in conjunction with an external turning device, and is feasible to manufacture and use.

Claims

1. A load-bearing, tilting air cushion stretcher, characterized in that, include: Upper and lower airtight layers and a vertical traction wire array located therebetween, the vertical traction wire array and the upper and lower airtight layers forming a sandwich load-bearing structure; at least one central load-bearing air chamber; rigid end inserts respectively disposed at the head end and foot end and encapsulated between the upper and lower airtight layers, the rigid end inserts having an airtight sealing weld area on their outer periphery; a reinforcing strip fixing area located inside the airtight sealing weld area, an end force-bearing connection part, and a non-inflatable main load-bearing traction strip encapsulated between the upper and lower airtight layers and connected to the end force-bearing connection part; and the... The structure includes a continuously connected end-mounted vertical traction wire array with a reinforced fixed connection area and a subsequent density gradient transition area; the aforementioned structure continuously forms an end-mounted load-bearing band in the length direction; wherein, the end-mounted force-bearing connection part is provided with corresponding holes, which are located within the projection range of the rigid end insert in the top view projection and at least partially overlap with the non-pneumatic main load-bearing traction band and the end-mounted vertical traction wire array, so that the load input from the end-mounted force-bearing connection part bypasses the gas-tight weld seam area and is transferred to the load-bearing area where the central load-bearing gas chamber is located.

2. The load-bearing tilting air cushion stretcher according to claim 1, characterized in that: A secondary bearing limiting band is provided between the end force-bearing connection and the rigid end insert or the non-inflatable main load-bearing strap. The secondary bearing limiting band has a reserved slack and is in a non-load-bearing state under normal inflation, and restricts further displacement of the end force-bearing connection when the inflation pressure decreases or the end is abnormally displaced.

3. The load-bearing tilting air cushion stretcher according to claim 1, characterized in that: The end force-bearing connection is configured to be located between two opposite ear plates when docking with an external flipping device, and forms a double shear bearing through a pin or quick-release pin; the corresponding hole is provided with a wear-resistant bushing.

4. The load-bearing tilting air cushion stretcher according to claim 1, characterized in that: The rigid end insert is a plate-shaped metal part, an engineering plastic part, or a composite material part; the non-inflatable main load-bearing strap is a webbing, a fiber bundle, or a composite strap.

5. The load-bearing tilting air cushion stretcher according to claim 1, characterized in that: The air cushion stretcher also includes an edge stabilizing air chamber, which has an independent valve port or valve group and forms an end stabilizing section at at least one of the head end and foot end; the end stabilizing section is configured to form a limiting fit on the end bearing band when the pair is rotated.

6. The load-bearing tilting air cushion stretcher according to claim 5, characterized in that: The edge stabilizing air chamber is isolated from the central bearing air chamber and can be filled and deflated separately.

7. The load-bearing tilting air cushion stretcher according to claim 5, characterized in that: The edge stabilizing air chamber is either a continuous annular air chamber or a strip-shaped air chamber located on both sides of the central bearing air chamber.

8. The load-bearing tilting air cushion stretcher according to claim 1, characterized in that: The central load-bearing air chamber is divided into sections along the length of the human body, forming load-bearing sections for the head and neck, trunk, and lower limbs.

9. The load-bearing tilting air cushion stretcher according to claim 1, characterized in that: The end-load-bearing connection is fixedly or through-connected to the rigid end insert or the non-inflatable main load-bearing strap.

10. The load-bearing tilting air cushion stretcher according to claim 1, characterized in that: The rigid end insert and the end force-bearing connection part are integrally formed, or the two are fixed together by riveting or screwing to form an integral connection seat.

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