A multifunctional wounded person transfer platform for complex environments

Abstract

The application discloses a multifunctional wounded person transferring platform for complex environment and an operation method thereof, and belongs to the technical field of medical rescue equipment. The multifunctional wounded person transferring platform comprises a stretcher main body, a guiding walking mechanism and foldable supporting legs. The stretcher main body comprises two flexible strain modules which are oppositely arranged at the rear end surfaces and whose upper surfaces form a rectangular flat stretcher surface. The flexible strain module is composed of two layers, the upper layer is a whole cushion covered with textile fabric, and the lower layer is a deformation layer composed of a plurality of transversely laid board materials which are flexibly connected in sequence. The plurality of board materials of the deformation layer are locked to support the whole cushion in normal times, when a stretcher bearer unlocks one side edge of the board materials and applies a lateral pulling force, the plurality of board materials can rotate to the other side around a first rotation axis, and after the external force applied by the stretcher bearer disappears, the deformation layer automatically recovers to be flat under the action of a cylindrical reset spring.

Description

Technical Field

[0001] This invention relates to the field of emergency medical rescue equipment technology, specifically to a multifunctional casualty transfer platform for complex environments. Background Technology

[0002] In disaster relief operations such as battlefields, maritime disasters, and earthquakes, the environment for transporting the wounded is extremely complex, often involving vertical movement, such as vertical ladders on ships and underground passageways. It also involves navigating narrow, winding passages, such as gaps in collapsed buildings and corners in ship cabin corridors. Traditionally, stretchers used for transporting the wounded are flat structures, with only minor additions such as wheels and straps for securing the injured. Figure 1 The diagram shows the configuration of a conventional stretcher. The stretcher panel 1 and the stretcher cover layer 1a provide a soft padding layer, allowing the injured person to lie comfortably on the stretcher. The horizontal rails 2 and vertical support bars 5 on the sides of the panel 1 form a protective barrier for the injured person, which, together with the straps 3, provides a barrier and protection. The lifting bar 4 is used by medical personnel to hold the stretcher. This type of stretcher is well-suited for transport on flat ground or gentle slopes. However, it is not suitable for transport in narrow, winding passages or vertically. In horizontally curved spaces, a rigid stretcher cannot pass through narrow corners, and forcing its way through may cause secondary injury to the injured person. Furthermore, rescue sites often lack stable platforms for emergency medical treatment.

[0003] In the prior art, there are already improved solutions for specific scenarios. For example, Chinese Patent Publication CN119184970A proposes an automatic pulley-type stretcher for transporting passengers on ship stairs, including a first bed board, a second bed board, guardrails, a power unit, and a pulling unit. The second bed board is movably connected to the first bed board. Two sets of guardrails are fixedly connected to the two long sides of the first bed board, including two support columns, several support rods, and a crossbar. The support columns are connected to the corners of the first bed board, the crossbar is fixedly connected between the two support columns, and the several support rods are fixedly connected between the crossbar and the first bed board. There are four power units, each movably connected to the top of the support columns. The pulling unit is movably connected to the crossbar, and a pulling rope is fixedly connected between the pulling unit and the second bed board. Two handles are fixedly connected to the two short sides of the first bed board. This invention eliminates the need for personnel to carry passengers up stairs, effectively overcoming the technical difficulties of narrow and angled ship stairs, which make transport inconvenient. It is simple to operate, safe, reliable, convenient, and fast.

[0004] Chinese patent publication CN109124898A discloses a foldable emergency stretcher, including a front shell and a rear shell. The front of both shells is a rigid panel, and the two shells are connected by a flexible hinge. Front and rear moving rollers are respectively installed on the opposite end faces of the front and rear shells. A pull-out head and neck support device is provided in the front shell, and a lower leg support device is provided in the rear shell. This invention can be folded and stored for easy transportation and storage. In addition, the device can be extended to a reasonable shape to help fix patients and injured persons, facilitating their timely transfer to medical treatment.

[0005] However, the above solutions still have shortcomings and lack the ability to flexibly turn within horizontally curved passageways. The CN109124898A solution primarily reduces storage volume through folding, but its unfolded state remains rigid and cannot dynamically adapt to horizontally curved transport paths. While the CN118787507A solution can adjust its angle, it is mainly used for horizontal transport and docking between upper and lower levels within aircraft, failing to address the issues of vertical climbing and passage through narrow, curved passageways. Currently, there is a lack of an integrated stretcher device that can simultaneously ensure vertical climbing safety, adapt to horizontal curvature, and provide on-site emergency rescue capabilities. Summary of the Invention

[0006] This invention aims to provide a multifunctional casualty transport platform to solve the technical challenges of existing stretchers in complex environments such as ships and rubble, where they cannot simultaneously and safely achieve vertical transport, navigate narrow and winding passages, and be quickly converted into a temporary emergency medical platform on-site. It can adapt to vertical and narrow, winding operating environments such as vertical passages in ship cabins, corners in underground spaces, and narrow crevices in rubble, while also providing stable transport and temporary emergency medical platform functionality. To achieve the above objectives, a first aspect of the present invention provides a multifunctional casualty transport platform for complex environments, comprising: a stretcher body, a guiding walking mechanism, and foldable support legs; The main body of the stretcher includes two flexible strain modules. The flexible strain modules are hexahedral in shape, including an upper surface, a lower surface, a front end face, a rear end face, and two side end faces. The rear end faces of the two flexible strain modules are placed opposite each other, and their upper surfaces form a rectangular flat stretcher surface. The flexible strain module consists of two layers: the upper layer is a whole pad covered with textile fabric, and the lower layer is a deformation layer composed of multiple horizontally laid strips of material, which are flexibly connected in sequence. The entire pad is connected to the upper surface of the deformation layer through multiple fixed points and does not bend or deform as the deformation layer bends; The multiple slats of the deformable layer are normally locked to support the entire pad. When the stretcher bearer unlocks one side of the slats and applies a lateral pulling force to that side, the multiple slats can rotate around the first rotation axis to the other side in a C-shape. When the stretcher bearer unlocks two sides of the slat material and applies an upward or downward pulling force, the multiple slat materials can bend upward or downward around the second rotation axis; The two ends of the lower surface of the deformable layer are respectively connected to two columnar return springs. After the external force applied by the stretcher bearer disappears, the deformable layer automatically returns to a straight shape under the action of the columnar return springs.

[0007] As a preferred embodiment of the present invention: the plurality of slatted materials are connected in series by metal ropes; the locking device of the metal ropes is set on the lifting handles at the four corners of the stretcher; the locking device has two states: locked and unlocked.

[0008] As a preferred embodiment of the present invention: the main body of the stretcher includes three modules. The middle module consists of two layers, the upper layer being a whole pad covered with textile fabric, and the lower layer being a rectangular flat plate formed by joining horizontally laid slats. The whole pad of the middle module and the horizontally laid slats of the lower layer are fixedly connected at multiple points, and the slats of the middle module are fixed and cannot rotate. A flexible strain module is provided at each end of the middle module.

[0009] As a preferred embodiment of the present invention: the upper surface of each of the pads is provided with at least one patient restraint strap for fixing the patient on the stretcher, and the patient restraint strap can be quickly adjusted in tightness.

[0010] As a preferred embodiment of the present invention: the foldable support legs are divided into 4 groups, which are respectively hinged to the four corners of the stretcher body; each support leg is a multi-section telescopic structure and is equipped with a locking pin to fix the support leg, so that the placed stretcher is supported at a predetermined height. When the stretcher is in transit, the support legs retract and fold to secure the bottom of the stretcher body. The stretcher is also equipped with a side railing consisting of multiple vertical supports and horizontal railings.

[0011] As a preferred embodiment of the present invention, the side rails on the side of the stretcher can be laid flat on the upper surface of the stretcher or removed.

[0012] As a preferred embodiment of the present invention: a guiding walking mechanism is provided on the side of the stretcher body, and the guiding walking mechanism is symmetrically arranged on both sides of the stretcher body; the guiding walking mechanism includes: a plurality of spaced directional rollers; the rollers on both sides of the stretcher body are arranged in pairs, and the directional rollers can engage with the guide rails on the vehicle and roll along the guide rails.

[0013] As a preferred embodiment of the present invention, both the first rotating shaft and the second rotating shaft are universal joints.

[0014] As a preferred embodiment of the present invention, the entire stretcher system can be raised into a stable, off-the-ground surgical platform by using multi-segment telescopic and foldable support legs, thus meeting the stability requirements for on-site emergency surgical procedures.

[0015] A second aspect of the present invention provides an operating method for a multi-functional casualty transport platform for complex environments, for operating the multi-functional casualty transport platform as described above, the method comprising the following steps: Step 1: Open the support legs of the stretcher, adjust the extension and retraction of the support legs to make the surface of the stretcher horizontal, and fix the support legs with locking pins. Step 2: Place the injured person on the main body of the stretcher. Based on the injury and wound location, select at least two restraint straps to fix the injured person to the stretcher and adjust the restraint straps to the predetermined tightness. Step 3: Fold up the stretcher's support legs and secure them to the bottom of the stretcher body. The caregiver then grips the stretcher handles to transfer the injured person. Step 4: At narrow turns, the front and rear caregivers rotate the locking device on the corresponding lifting handle according to the prescribed turning direction to unlock the metal rope, so that the deformable layer composed of multiple slats bends in the plane or bends up and down to pass through the narrow turns. Step 5. After re-entering the straight section, the medical staff will re-lock the locking device before continuing to transport the injured person; Step 6: Upon arrival at the medical unit, the nursing staff opens the stretcher's support legs, adjusts the stretcher surface to a horizontal position, secures the support legs with locking pins, loosens the patient's restraints, and transfers the patient into the operating room.

[0016] As a preferred embodiment of the second aspect of the present invention, step 4 includes the following sub-steps: Step 4.1, the in-plane bending includes: front and rear caregivers unlocking locking devices in the same direction to make the stretcher turn in a C-shape; Step 4.2, or, the front and rear caregivers unlock the locking devices in different directions to make the stretcher turn in an S-shape.

[0017] This invention uses a chain-link flexible bending module connected by a universal joint bearing, which allows the stretcher to passively conform to the horizontal bending path when unfolded and in use. It can pass through narrow corners without changing the overall shape of the stretcher, thus avoiding the need to repeatedly move the injured person.

[0018] Integrating a quickly convertible temporary operating table function: Compared to the angle adjustment of existing technologies, the multi-segment telescopic foldable support legs of this invention can raise the entire stretcher system into a stable operating platform off the ground, meeting the stability requirements of on-site emergency surgical treatment and realizing a functional leap from "transportation tool" to "emergency platform".

[0019] Compared with the prior art, the beneficial effects of the present invention are: This invention achieves safe and stable manual vertical transport: Compared to existing technologies, the stretcher of this invention has only a mechanical assembly structure, using a purely manual method of connecting directional rollers and guide rails. It requires no motor drive, is simple, reliable, and lightweight, and is particularly suitable for environments such as unpowered ruins and old ships. The casualty restraint system ensures absolute safety in a vertical position.

[0020] For the first time, the stretcher has achieved dynamic compliance on a horizontal bending path: Compared with the "folding" concept of existing technologies, the present invention uses a chain-link flexible bending module connected by universal joint bearings, which enables the stretcher to passively comply with the horizontal bending path when unfolded and in use. It can pass through narrow corners without changing the overall shape of the stretcher, avoiding repeated handling of the injured.

[0021] Integrating a quickly convertible temporary operating table function: Compared to the angle adjustment of existing technologies, the multi-segment telescopic foldable support legs of this invention can raise the entire stretcher system into a stable operating platform off the ground, meeting the stability requirements of on-site emergency surgical treatment and realizing a functional leap from "transportation tool" to "emergency platform".

[0022] High adaptability: This invention integrates multiple functions and can simultaneously meet various complex needs such as vertical climbing, horizontal obstacle avoidance, and on-site emergency rescue, filling the gap in the application of existing single-function stretchers in complex environments. Attached Figure Description

[0023] Figure 1 A three-dimensional structural diagram of a conventional patient transport stretcher; Figure 2 This is a schematic diagram of the multifunctional wounded soldier transfer system of the present invention in the transfer state; Figure 3 This is a schematic diagram of the multifunctional casualty transfer system of the present invention when it is laid flat at rest; Figure 4 This is a schematic diagram of the lower layer of the solid core pad of the present invention; Figure 5 This is a schematic diagram of the solid core pad of the present invention comprising upper and lower layers; Figure 6 This is a perspective view of the universal joint and supporting spring on the lower surface of the solid core pad of the present invention. Figure 7 This is a schematic diagram of the multifunctional casualty transfer system of the present invention in the state of transfer through a winding and narrow passage.

[0024] In the diagram: 1. Stretcher surface; 1a. Stretcher covering layer; 1b. Stretcher side end face; 2. Horizontal railing; 3. Wound restraints; 4. Lifting handle; 4a. Locking device controller; 5. Vertical support rod; 6. Slat material; 7. Solid pad; 8. Dividing port; 9. Support leg; 9a. Upper support; 9b. Lower support; 9c. Support beam; 10. Pulley; 10a. Pulley axle frame; 11. Support spring; 12a. Spring fixing end; 13. Universal joint. Detailed Implementation

[0025] This invention integrates multiple functions, simultaneously addressing various complex needs such as vertical climbing, horizontal obstacle avoidance, and on-site emergency rescue, filling the gap in the application of existing single-function stretchers in complex environments. It can adapt to vertical and narrow curved working environments such as vertical passages in ship cabins, corners in underground spaces, and narrow gaps in ruins, achieving safe and stable manual vertical transport.

[0026] The stretcher of this invention has only a mechanical assembly structure, employing a purely manual method of using directional rollers and guide rails. It requires no motor drive, is simple, reliable, and lightweight, and is particularly suitable for environments such as unpowered ruins and old ships. The stretcher's casualty restraint system ensures absolute safety in a vertical position.

[0027] The stretcher of this invention achieves dynamic compliant turning on a horizontally curved path for the first time: by enabling the stretcher to passively conform to a horizontally curved path when unfolded, the stretcher can pass through narrow corners without changing its overall shape, thus avoiding the need to repeatedly move the injured person.

[0028] This invention integrates the function of a quickly convertible temporary operating table: the multi-segment telescopic foldable support legs of this invention can raise the entire stretcher system into a stable, off-the-ground operating platform, meeting the stability requirements of on-site emergency surgical treatment and achieving a functional leap from "transport tool" to "emergency rescue platform." It is highly adaptable, combining the functions of stable transport and a temporary emergency rescue platform.

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figures 2-7 , As attached Figure 2The diagram shows the structure of the multifunctional patient transport system of the present invention in transport mode. The stretcher includes: a stretcher surface 1, a stretcher covering layer 1a, horizontal railings 2 and vertical support bars 5 for protecting the patient; straps 3 for restraining the patient; a lifting handle 4; and a locking device controller 4a. Caregivers can use the lifting handle 4 to carry the stretcher and use the locking device controller 4a to control the stretcher through narrow passages and to turn.

[0031] A first aspect of the present invention provides a multifunctional casualty transport platform for complex environments, comprising: a stretcher body, a guiding walking mechanism, and foldable support legs; The main body of the stretcher includes two flexible strain modules. The flexible strain modules are hexahedral in shape, including an upper surface, a lower surface, a front end face, a rear end face, and two side end faces. The rear end faces of the two flexible strain modules are placed opposite each other, and their upper surfaces form a rectangular flat stretcher surface. The flexible strain module consists of two layers: the upper layer is a whole pad covered with textile fabric, and the lower layer is a deformation layer composed of multiple horizontally laid strips of material, which are flexibly connected in sequence. The entire pad is connected to the upper surface of the deformation layer through multiple fixed points and does not bend or deform as the deformation layer bends; The multiple slats of the deformable layer are normally locked to support the entire pad. When the stretcher bearer unlocks one side of the slats and applies a lateral pulling force to that side, the multiple slats can rotate around the first rotation axis to the other side in a C-shape. When the stretcher bearer unlocks two sides of the slat material and applies an upward or downward pulling force, the multiple slat materials can bend upward or downward around the second rotation axis; The two ends of the lower surface of the deformable layer are respectively connected to two columnar return springs. After the external force applied by the stretcher bearer disappears, the deformable layer automatically returns to a straight shape under the action of the columnar return springs.

[0032] Example 1

[0033] Figure 3This is a schematic diagram of the multifunctional casualty transport system of the present invention in a stationary, flat position; this state can also be used as a surgical platform. At this point, the stretcher is divided into three sections, with dividing port 8. The middle section is a central module, which consists of two layers: the upper layer is a single piece of fabric-covered padding, and the lower layer is a rectangular flat plate formed by horizontally laid slats. The single piece of fabric in the central module is fixed to the horizontally laid slats at multiple points, typically by bolts or adhesive. The slats of the central module are fixed and cannot move. A flexible strain module is installed at each end of the central module. On both sides of the stretcher are pulleys 10 for rolling on the transport track. There are four pulleys on each side, arranged in pairs. The two pulleys on one side are connected to the pulley axle via pulley axle brackets 10a. Below the stretcher are foldable support legs 9, which are divided into 4 groups and hinged to the four corners of the stretcher body. Each support leg is a multi-segment telescopic structure, including an upper support 9a, a lower support 9b, and a support beam 9c that are connected in sequence. The stretcher arranged in this way can be used as a temporary operating table.

[0034] Example 2

[0035] Appendix Figure 4 and attached Figure 5 This is a schematic diagram of the flexible strain gauge module, as shown in the attached diagram. Figure 5 As shown, the flexible strain module is hexahedral in shape, including an upper surface, a lower surface, a front face, a rear face, and two side faces. Two flexible strain modules are placed opposite each other at their rear faces, and their upper surfaces form a rectangular flat stretcher surface. The flexible strain module consists of two layers: the upper layer is a solid pad 7 covered with textile fabric, filled with cotton or other wadding materials to make the pad relatively soft and prevent discomfort to the injured person; the lower layer is a deformable layer composed of multiple horizontally laid slats 6, which are flexibly connected sequentially.

[0036] Appendix Figure 7 This diagram illustrates a stretcher composed of three pads arranged in an S-shaped bend. The central pad is immovable, while the two end flexible strain modules' solid pads 7 are only fixed in their middle sections to one or two of the horizontally laid slats 6. When one side of the slats 6 of the flexible strain module's deformation layer rotates and stretches, the entire solid pad 7 does not rotate as a whole, but only shifts slightly, allowing the injured person to remain lying on the solid pad 7. Unless in extremely special circumstances, the injured person can also slightly rotate their body, allowing the stretcher to pass through the narrow S-shaped passage.

[0037] As a preferred embodiment of the present invention: the plurality of slatted materials are connected in series by metal ropes; the locking device of the metal ropes is set on the lifting handles at the four corners of the stretcher; the locking device has two states: locked and unlocked.

[0038] As a preferred embodiment of the present invention: the main body of the stretcher includes three modules. The middle module consists of two layers, the upper layer being a whole pad covered with textile fabric, and the lower layer being a rectangular flat plate formed by joining horizontally laid slats. The whole pad of the middle module and the horizontally laid slats of the lower layer are fixedly connected at multiple points, and the slats of the middle module are fixed and cannot rotate. A flexible strain module is provided at each end of the middle module.

[0039] As a preferred embodiment of the present invention: the upper surface of each of the pads is provided with at least one patient restraint strap for fixing the patient on the stretcher, and the patient restraint strap can be quickly adjusted in tightness.

[0040] As a preferred embodiment of the present invention: the foldable support legs are divided into 4 groups, which are respectively hinged to the four corners of the stretcher body; each support leg is a multi-section telescopic structure and is equipped with a locking pin to fix the support leg, so that the placed stretcher is supported at a predetermined height. When the stretcher is in transit, the support legs retract and fold to secure the bottom of the stretcher body. The stretcher is also equipped with a side railing consisting of multiple vertical supports and horizontal railings.

[0041] As a preferred embodiment of the present invention, the side rails on the side of the stretcher can be laid flat on the upper surface of the stretcher or removed.

[0042] As a preferred embodiment of the present invention: a guiding walking mechanism is provided on the side of the stretcher body, and the guiding walking mechanism is symmetrically arranged on both sides of the stretcher body; the guiding walking mechanism includes: a plurality of spaced directional rollers; the rollers on both sides of the stretcher body are arranged in pairs, and the directional rollers can engage with the guide rails on the vehicle and roll along the guide rails.

[0043] Appendix Figure 6 A structural perspective view of the universal joint 13 and support spring 11 on the lower surface of the solid core pad is provided; there are actually multiple slat materials 6, but only one is shown here. The universal joint 13 provided under the slat material 6 can rotate horizontally, causing the slat material 6 to rotate to the left or right, and can also rotate forward and backward, causing the slat material 6 to rotate upward or downward. This rotation can only occur when the locking device is opened. The direction of rotation is caused by the force applied by the caregiver to pull the spring. The fixed end 12a of the spring is connected to the metal material ropes of other pad layers. The typical metal material rope is a steel wire rope.

[0044] The specific operation example is as follows: The nursing staff loosens the locking device on the left side, and then pulls the left lifting handle with the left hand. The spring on the left side of the slat material 6 extends, and naturally the slat material 6 rotates to the right, and the movement direction of the front end of the stretcher turns to the right.

[0045] As a preferred embodiment of the present invention, both the first rotating shaft and the second rotating shaft are universal joints.

[0046] The first axis of rotation here refers to the universal joint 13 under the central slat material 6 on one side, while the second axis of rotation refers to the universal joint 13 under the central slat material 6 on the other side. The central slat materials on both sides are not the same piece of slat. When the caregiver releases the handle that is pulling the rotation, the spring retracts due to its own tension, pulling the multiple slat materials 6 back to their original parallel positions, and the stretcher returns to a straight forward position.

[0047] A second aspect of the present invention provides an operating method for a multi-functional casualty transport platform for complex environments, for operating the multi-functional casualty transport platform as described above, the method comprising the following steps: Step 1: Open the support legs of the stretcher, adjust the extension and retraction of the support legs to make the surface of the stretcher horizontal, and fix the support legs with locking pins. Step 2: Place the injured person on the main body of the stretcher. Based on the injury and wound location, select at least two restraint straps to fix the injured person to the stretcher and adjust the restraint straps to the predetermined tightness. Step 3: Fold up the stretcher's support legs and secure them to the bottom of the stretcher body. The caregiver then grips the stretcher handles to transfer the injured person. Step 4: At narrow turns, the front and rear caregivers rotate the locking device on the corresponding lifting handle according to the prescribed turning direction to unlock the metal rope, so that the deformable layer composed of multiple slats bends in the plane or bends up and down to pass through the narrow turns. Step 5. After re-entering the straight section, the medical staff will re-lock the locking device before continuing to transport the injured person; Step 6: Upon arrival at the medical unit, the nursing staff opens the stretcher's support legs, adjusts the stretcher surface to a horizontal position, secures the support legs with locking pins, loosens the patient's restraints, and transfers the patient into the operating room.

[0048] As a preferred embodiment of the second aspect of the present invention, step 4 includes the following sub-steps: Step 4.1, the in-plane bending includes: front and rear caregivers unlocking locking devices in the same direction to make the stretcher turn in a C-shape; Step 4.2, or, the front and rear caregivers unlock the locking devices in different directions to make the stretcher turn in an S-shape.

[0049] The contents not described in detail in this specification are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-functional casualty transfer platform for complex environments, characterized in that, include: The main body of the stretcher, the guiding and walking mechanism, and the foldable support legs; The main body of the stretcher includes two flexible strain modules. The flexible strain modules are hexahedral in shape, including an upper surface, a lower surface, a front end face, a rear end face, and two side end faces. The rear end faces of the two flexible strain modules are placed opposite each other, and their upper surfaces form a rectangular flat stretcher surface. The flexible strain module consists of two layers: the upper layer is a whole pad covered with textile fabric, and the lower layer is a deformation layer composed of multiple horizontally laid strips of material, which are flexibly connected in sequence. The entire pad is connected to the upper surface of the deformation layer through multiple fixed points and does not bend or deform as the deformation layer bends; The multiple slats of the deformable layer are normally locked to support the entire pad. When the stretcher bearer unlocks one side of the slats and applies a lateral pulling force to that side, the multiple slats can rotate around the first rotation axis to the other side in a C-shape. When the stretcher bearer unlocks two sides of the slat material and applies an upward or downward pulling force, the multiple slat materials can bend upward or downward around the second rotation axis; The two ends of the lower surface of the deformable layer are respectively connected to two columnar return springs. After the external force applied by the stretcher bearer disappears, the deformable layer automatically returns to a straight shape under the action of the columnar return springs.

2. The multi-functional casualty transfer platform for complex environments according to claim 1, characterized in that: The multiple slat materials are connected in series by metal ropes; the locking devices of the metal ropes are installed on the lifting handles at the four corners of the stretcher; the locking devices have two states: locked and unlocked.

3. A multi-functional casualty transfer platform for complex environments according to claim 2, characterized in that: The main body of the stretcher includes three modules. The middle module consists of two layers: the upper layer is a whole pad covered with textile fabric, and the lower layer is a rectangular flat plate made of horizontally laid slats joined together. The whole pad of the middle module and the horizontally laid slats of the lower layer are fixedly connected at multiple points, and the slats of the middle module are fixed and cannot rotate. A flexible strain module is set at each end of the middle module.

4. A multi-functional casualty transfer platform for complex environments according to claim 3, characterized in that: At least one restraint strap is provided laterally on the upper surface of each of the pads to secure the wounded person on the stretcher. The restraint strap can be quickly adjusted for tightness.

5. A multi-functional casualty transfer platform for complex environments according to claim 1, characterized in that: The foldable support legs are divided into 4 groups, which are hinged to the four corners of the stretcher body. Each support leg is a multi-section telescopic structure and is equipped with a locking pin to fix the support leg, so that the stretcher is supported at a predetermined height when parked. When the stretcher is in transit, the support legs retract and fold to secure the bottom of the stretcher body. The stretcher is also equipped with a side railing consisting of multiple vertical supports and horizontal railings.

6. A multi-functional casualty transfer platform for complex environments according to claim 1, characterized in that: The side rails on the stretcher can be laid flat on the upper surface of the stretcher or removed.

7. A multi-functional casualty transfer platform for complex environments according to claim 1, characterized in that: A guiding walking mechanism is installed on the side of the main body of the stretcher, and the guiding walking mechanism is symmetrically arranged on both sides of the main body of the stretcher; The guiding and walking mechanism includes: multiple spaced-apart directional rollers; rollers on both sides of the stretcher body are arranged in pairs, and the directional rollers can engage with the guide rails on the vehicle and roll along the guide rails.

8. A multi-functional casualty transfer platform for complex environments according to claim 1, characterized in that: Both the first rotating shaft and the second rotating shaft are universal joints.

9. A method for operating a multi-functional casualty transfer platform for complex environments, used to operate the multi-functional casualty transfer platform as described in claims 1-8, characterized in that, The method includes the following steps: Step 1: Open the support legs of the stretcher, adjust the extension and retraction of the support legs to make the surface of the stretcher horizontal, and fix the support legs with locking pins. Step 2: Place the injured person on the main body of the stretcher. Based on the injury and wound location, select at least two restraint straps to fix the injured person to the stretcher and adjust the restraint straps to the predetermined tightness. Step 3: Fold up the stretcher's support legs and secure them to the bottom of the stretcher body. The caregiver then grips the stretcher handles to transfer the injured person. Step 4: At narrow turns, the front and rear caregivers rotate the locking device on the corresponding lifting handle according to the prescribed turning direction to unlock the metal rope, so that the deformable layer composed of multiple slats bends in the plane or bends up and down to pass through the narrow turns. Step 5. After re-entering the straight section, the medical staff will re-lock the locking device before continuing to transport the injured person; Step 6: Upon arrival at the medical unit, the nursing staff opens the stretcher's support legs, adjusts the stretcher surface to a horizontal position, secures the support legs with locking pins, loosens the patient's restraints, and transfers the patient into the operating room.

10. The operating method as described in claim 9, characterized in that, Step 4 includes the following sub-steps: Step 4.1, the in-plane bending includes: front and rear caregivers unlocking locking devices in the same direction to make the stretcher turn in a C-shape; Step 4.2, or, the front and rear caregivers unlock the locking devices in different directions to make the stretcher turn in an S-shape.

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