Foldable lightweight narrow space used for severe patient transfer bed

Abstract

The application discloses a foldable lightweight critical patient transfer bed for narrow space, and belongs to the technical field of medical instruments, mainly comprising two parallel main supporting columns, two supporting legs fixedly connected to the same end of the two main supporting columns, and transfer wheels installed at the end of the supporting legs away from the main supporting columns; the application is provided with four forty-nine centimeter large-diameter transfer wheels, and compared with traditional small-diameter wheels, the ground pressure is reduced by 40%, the transfer is smooth on sandy and muddy road surfaces, the wheel body is prevented from sinking, the defect that a traditional critical patient transfer bed cannot adapt to complex outdoor road conditions is solved, the bed width is reduced from 95 centimeters to 56 centimeters through the transverse folding design of the folding rod, the problem that a traditional critical patient transfer bed cannot enter an outdoor temporary medical institution due to the excessively large width is solved, the transportation cost is reduced, no extra space is occupied, and the protection function and the convenience of storage are compatible.

Description

Technical Field

[0001] This application relates to the field of medical device technology, specifically a foldable, lightweight, and compact transport bed for use in confined spaces for critically injured patients. Background Technology

[0002] In emergency rescue scenarios such as war, earthquakes, wildfires, and floods, temporary medical facilities (tents or mobile shelters) need to be equipped with various bed facilities, including intensive care beds, general beds, operating tables, and stretchers (carts), to complete early treatment. However, existing facilities have significant deficiencies, which restrict the efficiency of on-site treatment and the safety of the wounded and sick. First, the transport burden is heavy, as various bed facilities need to be transported separately, occupying a large amount of transport capacity and manpower, and is poorly adapted to the needs of field delivery. Second, the risks of bed changing during transfer are high. Patients need to be frequently changed when transferred between the facility and other facilities, and the height of intensive care beds, general beds and stretchers is inconsistent, increasing the difficulty of bed changing and the safety risks to patients. Third, the functional adaptability is insufficient. The existing intensive care transport beds cannot adapt to the complex road conditions and narrow spaces in the field, and do not have multi-directional folding function to reduce the delivery volume. The existing stretchers have limited width, making it difficult to carry critically ill patients for a long time and support continuous treatment. In addition, the bed angle is not adjustable, which cannot meet the positional requirements for anti-shock and anti-thrombosis.

[0003] Therefore, it is necessary to provide a foldable, lightweight, and compact transport bed for critically injured patients to address the aforementioned issues.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0005] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is: to provide a foldable, lightweight, and compact transport bed for critically injured patients, designed for use in confined spaces. Through the use of four large-diameter 49cm transport wheels, compared to traditional small-diameter wheels, the ground pressure is reduced by 40%, allowing for smooth movement on sandy and muddy surfaces and preventing wheel sinking. This solves the problem of traditional critical care transport beds being unable to adapt to complex field conditions. Furthermore, through the inclusion of a first folding rod, a second folding rod, a folding hinge, a positioning plate, a locking nut, a folding self-locking hinge, a second bed board, a first bed board, a third bed board, a fourth bed board, and side panels, this addresses the issue of traditional critical care transport beds being too wide to enter temporary field medical facilities, reducing transport costs, not occupying extra space, and achieving both protective and storage functions. To ensure convenient accessibility, the system utilizes a first angle support rod, a second angle support rod, a guide U-shaped groove, a clamp groove, a first bed board, and a third bed board. Pushing the first bed board upwards via a folding hinge simultaneously extends the second angle support rod within the first angle support rod. The column at the end of the second angle support rod slides along the guide U-shaped groove and engages with the corresponding clamp groove for positioning according to treatment needs, achieving a maximum tilt angle adjustment of 40 degrees. This angle effectively improves breathing difficulties, reduces intracranial pressure, and prevents ventilator-associated pneumonia. Similarly, pushing the third bed board upwards, through the extension of the telescopic link and the positioning of the clamp groove, achieves a maximum lower body elevation of 45 degrees. It can be routinely adjusted to a 20-30 degree anti-shock position, promoting lower limb blood circulation through positional adjustment and adapting to the positioning needs of critical care.

[0006] The technical solution adopted by this application to solve its technical problem is: a foldable, lightweight, and narrow-space transport bed for critically injured patients, comprising two parallel main support columns, with two support legs fixedly connected to the same end of each of the two main support columns. A transport wheel is installed at the end of each support leg away from the main support column. A first reinforcing rod is fixed to the connection between the support leg and the main support column by a nut. A first folding rod is also fixed at the connection between the support leg and the main support column. Along the length direction, a first bed board, a second bed board, a third bed board, and a fourth bed board are sequentially arranged at the end of the main support column away from the support legs. Two folding hinges are provided between the first and second bed boards, between the second and third bed boards, and between the third and fourth bed boards. Adjacent bed boards are rotatably connected by the folding hinges. The second bed board is fixedly connected to the main support column by bolts. A second reinforcing rod is provided at the end of the main support column near the support legs and between the two support legs. The middle part of each support leg is fixedly connected to the second reinforcing rod.

[0007] Furthermore, a first folding rod is fixed to one end of the fourth bed board facing the transfer wheel, and multiple fixed support rods are fixed to one end of the second reinforcing rod. The end of the fixed support rod away from the second reinforcing rod is connected to the main support column with a clamp. The connection positions of the second reinforcing rod and the support leg, the connection positions of the second reinforcing rod and the fixed support rod, and the connection positions of the fixed support rod and the main support column are all fixed with a right-angle reinforcing plate by bolts.

[0008] Furthermore, in the support legs at both ends of the main support column, a first folding rod and a second folding rod are respectively provided near the transfer wheel. The support leg near the fourth bed board is provided with a first folding rod, and the support leg away from the fourth bed board is provided with a second folding rod. Multiple first folding rods are evenly distributed along the length direction at one end of the second reinforcing rod. The connection between the first folding rod and the second reinforcing rod is connected by a folding hinge by bolts. The first folding rod is rotatably connected to the second reinforcing rod through the folding hinge. The middle part of the first folding rod is also provided with a folding hinge by bolts. The first folding rod is folded through the folding hinge in the middle. A positioning plate is slidably connected to the middle of both the first folding rod and the second folding rod. Two locking nuts are symmetrically distributed on the positioning plate.

[0009] Furthermore, the first bed board is provided with a side baffle at the end away from the second bed board. Two folding self-locking hinges are symmetrically fixed at one end of the side baffle by bolts. The end of the folding self-locking hinge away from the side baffle is fixedly connected to the corresponding fixed support rod by bolts. The side baffle is rotatably connected to the main support column through the folding self-locking hinges. The side baffle can rotate at 0 degrees, 90 degrees and 180 degrees through the folding self-locking hinges.

[0010] Furthermore, each of the first bed board and the third bed board facing the main support column is provided with a first angle support rod. The end of the first angle support rod near the main support column is provided with a first mounting plate. The first mounting plate is fixedly connected to the first folding rod by bolts, and the first angle support rod is rotatably connected to the first mounting plate. A second angle support rod is slidably connected inside the first angle support rod. The end of the second angle support rod away from the first angle support rod is rotatably connected to a second mounting plate. The end of the second mounting plate away from the second angle support rod is fixedly connected to the corresponding first bed board or third bed board by bolts.

[0011] Furthermore, a guide U-shaped groove is provided in the middle of the first angle support rod, and multiple clamping grooves are provided at equal intervals along the length direction in the guide U-shaped groove. A column block is fixed in the middle of the end of the second angle support rod near the first angle support rod. The column block is slidably connected to the guide U-shaped groove and can be inserted into the clamping groove to achieve positioning.

[0012] Furthermore, an infusion tube is provided in the middle of one end of the second bed board, and a support block is fixed to one end of the infusion tube. The support block is fixedly connected to the second reinforcing rod by bolts. An infusion tube angle valve is provided at the connection position between the infusion tube and the main support column. The infusion tube angle valve is fixedly connected to the main support column by bolts.

[0013] The beneficial effects of this application are: 1. This application provides a foldable, lightweight, and narrow-space-use transport bed for critically injured patients. By using four large-diameter transport wheels of 49 centimeters, the ground pressure is reduced by 40% compared to traditional small-diameter wheels. This allows for smooth movement on sandy and muddy roads, preventing the wheels from sinking and solving the problem that traditional critical care transport beds cannot adapt to complex road conditions in the field.

[0014] 2. This application provides a foldable, lightweight, and narrow-space transport bed for critically injured patients. It comprises a first folding rod, a second folding rod, folding hinges, a positioning plate, locking nuts, a self-locking folding hinge, a second bed board, a first bed board, a third bed board, a fourth bed board, and side panels. Both the first and second folding rods utilize two equal-length aluminum profiles combined with three folding hinges to form a stable triangular folding structure. During transport, releasing the locking nuts on the positioning plate pushes the two main support columns together, allowing the folding rods to fold 90 degrees via the central hinge. This allows easy passage through narrow spaces such as tent doors and corridor corners. For retraction, first release the positioning of the first angle support rod from the bed board, then flip the rods towards the second bed board. The first and third bed boards, and the fourth bed board, fold synchronously with the third bed board. The final bed board assembly is folded to half its original length. Combined with the width after lateral folding, the transport volume is reduced to one-quarter of the unfolded state, significantly reducing transport capacity. The side panels at the ends of the first bed board are connected to the fixed support rod via folding self-locking hinges. In the treatment state, the side panels rotate around the hinges to a position perpendicular to the bed board, forming a protective barrier to prevent the injured from sliding sideways. When folding for transport, the self-locking hinges are unlocked, and the side panels rotate to a parallel state with the bed board. This solves the problem that traditional intensive care transport beds are too wide to enter temporary medical facilities in the field, reduces transport capacity costs, does not occupy extra space, and achieves compatibility between protective functions and convenient storage.

[0015] 3. This application provides a foldable, lightweight, and narrow-space-use transport bed for critically injured patients. Through a set of first-angle support rods, second-angle support rods, guide U-shaped grooves, clamp grooves, a first bed board, and a third bed board, the first bed board is pushed to flip upwards around a folding hinge. Simultaneously, the second-angle support rod within the first-angle support rod is pulled out. The column at the end of the second-angle support rod slides along the guide U-shaped groove and is positioned within the corresponding clamp groove according to treatment needs. A maximum tilt angle adjustment of 40 degrees can be achieved. This angle can effectively improve breathing difficulties, reduce intracranial pressure, and prevent ventilator-associated pneumonia. Similarly, pushing the third bed board upwards, through the pulling of the telescopic connecting rod and the positioning of the clamp groove, achieves a maximum lower body elevation of 45 degrees. It can be routinely adjusted to a 20-30 degree anti-shock position. This positional adjustment promotes lower limb blood circulation and adapts to the positioning needs of critical care.

[0016] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the overall first three-dimensional structure; Figure 2 for Figure 1 Enlarged structural diagram of section A in the middle; Figure 3 This is a schematic diagram of the overall second three-dimensional structure; Figure 4 This is a schematic diagram of the overall bottom-view three-dimensional structure; Figure 5 for Figure 4 Enlarged structural diagram of section B in the middle; Figure 6 This is a three-dimensional structural diagram of the overall framework.

[0018] The following are the labeling elements in the figure: 1. Main support column; 2. First bed board; 3. Second bed board; 4. Third bed board; 5. Fourth bed board; 6. Folding hinge; 7. First reinforcing rod; 8. Side baffle; 9. Second reinforcing rod; 10. Bracket block; 11. Infusion tube angle valve; 12. Infusion tube; 13. Support leg; 14. First folding rod; 15. Transfer wheel; 16. Folding hinge; 17. Right angle reinforcing plate; 18. Second folding rod; 19. Fixed support rod; 20. Folding self-locking hinge; 21. First mounting block plate; 22. First angle support rod; 23. Second angle support rod; 24. Second mounting block plate; 25. Guide U-shaped groove; 26. Clamp groove; 27. Positioning plate; 28. Locking nut. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0021] like Figure 1-6As shown, this application provides a foldable, lightweight, and compact transport bed for critically injured patients, comprising two parallel main support columns 1. Two support legs 13 are fixedly connected to the same end of each main support column 1. A transport wheel 15 is installed at the end of each support leg 13 away from the main support column 1. The transport wheel 15 is a large-diameter wheel with a diameter of 49 cm. A first reinforcing rod 7 is fixed to the connection between the support leg 13 and the main support column 1 by a nut. A first folding rod 14 is also fixed at the connection between the support leg 13 and the main support column 1. A first bed board 2, a second bed board 3, a third bed board 4, and a fourth bed board 5 are sequentially arranged along the length of the end of the main support column 1 away from the support leg 13. The first bed board 2 and the second bed board 3, and the second bed board 3 and the third bed board 4 are connected in a specific manner. Two folding hinges 6 are provided between the third bed board 4 and the fourth bed board 5. Adjacent bed boards are rotatably connected by the folding hinges 6. The second bed board 3 is fixedly connected to the main support column 1 by bolts. A second reinforcing rod 9 is provided at one end of the main support column 1 near the support leg 13 and between the two support legs 13. The middle part of the support leg 13 is fixedly connected to the second reinforcing rod 9. A first folding rod 14 is fixed at one end of the fourth bed board 5 facing the transfer wheel 15. Multiple fixed support rods 19 are fixed at one end of the second reinforcing rod 9. The end of the fixed support rod 19 away from the second reinforcing rod 9 is connected to the main support column 1 by a clamp. The connection position of the second reinforcing rod 9 to the support leg 13, the connection position of the second reinforcing rod 9 to the fixed support rod 19, and the connection position of the fixed support rod 19 to the main support column are also specified. At each connection point of the main support column 1, a right-angle reinforcing plate 17 is fixed by bolts. Among the support legs 13 at both ends of the main support column 1, a first folding rod 14 and a second folding rod 18 are respectively provided near the transfer wheel 15. The support leg 13 near the fourth bed board 5 has the first folding rod 14, and the support leg 13 away from the fourth bed board 5 has the second folding rod 18. Multiple first folding rods 14 are evenly distributed along the length of one end of the second reinforcing rod 9. The connection points between the first folding rods 14 and the second reinforcing rod 9 are connected by folding hinges 16 via bolts. The first folding rods 14 are rotatably connected to the second reinforcing rod 9 via the folding hinges 16. A folding hinge 16 is also provided in the middle of the first folding rod 14 via bolts. The first folding rod 14 is then connected to the second reinforcing rod 9 via the folding hinge 16 in the middle. The first folding rod 14 and the second folding rod 18 are slidably connected to a positioning plate 27 at their middle parts. Two locking nuts 28 are symmetrically distributed on the positioning plate 27. A first angle support rod 22 is provided at the end of the first bed board 2 facing the main support column 1, and at the end of the third bed board 4 facing the main support column 1. A first mounting plate 21 is provided at the end of the first angle support rod 22 closest to the main support column 1. The first mounting plate 21 is fixedly connected to the first folding rod 14 by bolts, and the first angle support rod 22 is rotatably connected to the first mounting plate 21. A second angle support rod 23 is slidably connected inside the first angle support rod 22. A second mounting plate 24 is rotatably connected at the end of the second angle support rod 23 away from the first angle support rod 22.The end of the second mounting plate 24 furthest from the second angle support rod 23 is fixedly connected to the corresponding first bed board 2 or third bed board 4 by bolts. The end of the first bed board 2 furthest from the second bed board 3 is provided with a side baffle 8. One end of the side baffle 8 is symmetrically fixed with two folding self-locking hinges 20 by bolts. The end of the folding self-locking hinge 20 furthest from the side baffle 8 is fixedly connected to the corresponding fixed support rod 19 by bolts. The side baffle 8 is rotatably connected to the main support column 1 via the folding self-locking hinges 20. The side baffle 8 can rotate at 0 degrees, 90 degrees, and 180 degrees via the folding self-locking hinges 20. The main support column 1, second reinforcing rod 9, first folding rod 14, second folding rod 18, fixed support rod 19, support leg 13, first reinforcing rod 7, side baffle 8, first bed board 2, second bed board 3, third bed board 4, and fourth bed board 5 are all made of aluminum alloy plate, aluminum profile, or aluminum square tube. All load-bearing aluminum profiles or aluminum square tubes have through holes and are secured by positioning clips 27 and T-shaped square locking nuts 28. The overall height of the transfer bed is 70±1cm, the width in the treatment state is 95±1cm, and the width in the folded transfer state is 56cm.

[0022] In this embodiment, the main structure of the transfer bed is made of aerospace-grade aluminum alloy plates, aluminum profiles and aluminum square tubes, which reduces the weight by more than 40% compared with traditional carbon steel transfer beds, achieving the requirement of lightweight portability. All load-bearing structures have through holes in the aluminum profiles or aluminum square tubes, and are fastened by positioning plates 27 and T-shaped square locking nuts 28. The nesting fit of bolts and through holes and the anti-slip properties of locking nuts make the load distribution of the load-bearing structure more even. While meeting the requirements of lightweight, the load-bearing capacity can reach 150kg, which is fully suitable for the long-term load-bearing needs of critically injured patients. Lateral folding: The first folding rod 14 and the second folding rod 18 both use two aluminum profiles of equal length and three folding hinges 16 to form a stable triangular folding structure. In the transfer state, loosen the locking nut 28 on the positioning plate 27, push the two main support columns 1 to move towards each other, and the folding rod achieves a ninety-degree fold through the middle hinge, so that the width of the bed is reduced from 95±1cm in the treatment state to 56cm, which can easily pass through narrow spaces such as tent doors (normal width 60-80cm), corridor corners, etc. After folding, tighten the locking nut 28, and the positioning plate 27 axially limits the folding rod to ensure that the structure is stable and does not loosen during the transfer process. Folding of the bed board: The first bed board 2, the second bed board 3, the third bed board 4, and the fourth bed board 5 are connected in sequence by folding hinges 6. The second bed board 3 is fixed to the main support column 1 to form a folding reference. When retracting, first release the positioning of the first angle support rod 22 and the bed board (the column block exits the clamp groove 26), and then flip the first bed board 2 and the third bed board 4 in the direction of the second bed board 3 respectively. The fourth bed board 5 folds synchronously with the third bed board 4. Finally, the bed board assembly is folded to 1 / 2 of its original length. Combined with the width after lateral folding, the transfer volume is reduced to 1 / 4 of the unfolded state, which greatly reduces the transportation capacity occupied. Side panel folding: The side panel 8 at the end of the first bed board 2 is connected to the fixed support rod 19 via a folding self-locking hinge 20. In the treatment state, the side panel 8 is flipped around the hinge to a position perpendicular to the bed board, forming a protective barrier to prevent the injured from sliding sideways. When folding for transport, the self-locking hinge is unlocked, and the side panel 8 is flipped to a state parallel to the bed board, without occupying extra space, thus achieving compatibility between protective function and storage convenience.

[0023] The support leg 13 is equipped with a large-diameter transfer wheel 15 with a diameter of 49cm. Compared with the small-diameter casters of traditional transfer beds, the ground contact area is increased by more than 60%. On sandy, muddy roads after rain or rutted roads, the large-diameter wheel can reduce the ground pressure and prevent the wheel from sinking. The anti-slip texture on the surface of the wheel enhances the friction with the ground, reducing the pushing resistance by 30%. Only when turning does it need to slightly lift one side of the wheel to adjust the direction. It can be pushed stably in other scenarios, solving the problem that traditional stretcher casters cannot be used on complex roads.

[0024] like Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a guide U-shaped groove 25 is provided in the middle of the first angle support rod 22. Multiple clamping grooves 26 are provided at equal intervals along the length direction in the guide U-shaped groove 25. A column block is fixed in the middle of the end of the second angle support rod 23 near the first angle support rod 22. The column block is slidably connected to the guide U-shaped groove 25 and can be inserted into the clamping grooves 26 for positioning. An infusion tube 12 is provided in the middle of one end of the second bed board 3. A support block 10 is fixed to one end of the infusion tube 12. The support block 10 is fixedly connected to the second reinforcing rod 9 by bolts. An infusion tube angle valve 11 is provided at the connection position between the infusion tube 12 and the main support column 1. The infusion tube angle valve 11 is fixedly connected to the main support column 1 by bolts. The first angle support rod 22 and the second angle support rod 23 form a straight telescopic connecting rod.

[0025] In this embodiment, the upper backrest is adjusted by pushing the first bed board 2 to flip upward around the folding hinge 6, and the second angle support rod 23 inside the first angle support rod 22 is simultaneously pulled out. The column block at the end of the second angle support rod 23 slides along the guide U-shaped groove 25 and is positioned in the corresponding clamp groove 26 according to the treatment needs. The maximum tilt angle adjustment can reach 40 degrees. This angle can effectively improve breathing difficulties, reduce intracranial pressure, and prevent ventilator-associated pneumonia. Lower body adjustment: Similarly, push the third bed board 4 to flip it upwards, and through the pulling of the telescopic connecting rod and the positioning of the clamp groove 26, the lower body can be raised to a maximum of 45 degrees. It can be normally adjusted to a 20 to 30 degree anti-shock position. The position adjustment promotes blood circulation in the lower limbs and adapts to the position requirements of critical care.

[0026] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A foldable, lightweight, and space-confined transport bed for critically injured patients, comprising two parallel main support columns (1), characterized in that: Two support legs (13) are fixedly connected to the same end of each of the two main support columns (1). A transfer wheel (15) is installed at the end of the support leg (13) away from the main support column (1). A first reinforcing rod (7) is fixed to the connection between the support leg (13) and the main support column (1) by a nut. A first folding rod (14) is also fixed at the connection between the support leg (13) and the main support column (1). A first bed board (2), a second bed board (3), a third bed board (4) and a fourth bed board (5) are arranged sequentially along the length of the end of the main support column (1) away from the support leg (13). The bed board (5) has two folding hinges (6) between the first bed board (2) and the second bed board (3), between the second bed board (3) and the third bed board (4), and between the third bed board (4) and the fourth bed board (5). The adjacent bed boards are rotatably connected by the folding hinges (6). The second bed board (3) is fixedly connected to the main support column (1) by bolts. The main support column (1) is located near the end of the support leg (13) and between the two support legs (13) with a second reinforcing rod (9). The middle part of the support leg (13) is fixedly connected to the second reinforcing rod (9).

2. The foldable, lightweight, and space-confined transport bed for critically injured patients according to claim 1, characterized in that: The fourth bed board (5) has a first folding rod (14) fixed at one end facing the transfer wheel (15), and a plurality of fixed support rods (19) fixed at one end of the second reinforcing rod (9). The end of the fixed support rod (19) away from the second reinforcing rod (9) is connected to the main support column (1) by a clamp. The connection positions of the second reinforcing rod (9) and the support leg (13), the connection positions of the second reinforcing rod (9) and the fixed support rod (19), and the connection positions of the fixed support rod (19) and the main support column (1) are all fixed with a right-angle reinforcing plate (17) by bolts.

3. The foldable, lightweight, and space-confined transport bed for critically injured patients according to claim 1, characterized in that: Among the support legs (13) at both ends of the main support column (1), a first folding rod (14) and a second folding rod (18) are respectively provided near the transfer wheel (15). The support leg (13) near the fourth bed board (5) is provided with the first folding rod (14), and the support leg (13) away from the fourth bed board (5) is provided with the second folding rod (18). One end of the second reinforcing rod (9) has multiple first folding rods (14) evenly distributed along the length direction. The connection position between the first folding rod (14) and the second reinforcing rod (9) is through A folding hinge (16) is bolted to the first folding rod (14), which is rotatably connected to the second reinforcing rod (9) via the folding hinge (16). The middle part of the first folding rod (14) is also bolted with a folding hinge (16). The first folding rod (14) is folded by the folding hinge (16) in the middle. The middle parts of the first folding rod (14) and the second folding rod (18) are slidably connected to a positioning plate (27). Two locking nuts (28) are symmetrically distributed on the positioning plate (27).

4. The foldable, lightweight, and space-confined transport bed for critically injured patients according to claim 1, characterized in that: The first bed board (2) is provided with a side baffle (8) at the end away from the second bed board (3). Two folding self-locking hinges (20) are symmetrically fixed at one end of the side baffle (8) by bolts. The end of the folding self-locking hinge (20) away from the side baffle (8) is fixedly connected to the corresponding fixed support rod (19) by bolts. The side baffle (8) is rotatably connected to the main support column (1) through the folding self-locking hinge (20). The side baffle (8) can rotate at 0 degrees, 90 degrees and 180 degrees through the folding self-locking hinge (20).

5. The foldable, lightweight, and space-confined transport bed for critically injured patients according to claim 1, characterized in that: The first bed board (2) facing the main support column (1) and the third bed board (4) facing the main support column (1) are each provided with a first angle support rod (22). The first angle support rod (22) is provided with a first mounting plate (21) at the end near the main support column (1). The first mounting plate (21) is fixedly connected to the first folding rod (14) by bolts. The first angle support rod (22) is rotatably connected to the first mounting plate (21). The first angle support rod (22) is slidably connected to a second angle support rod (23). The end of the second angle support rod (23) away from the first angle support rod (22) is rotatably connected to a second mounting plate (24). The end of the second mounting plate (24) away from the second angle support rod (23) is fixedly connected to the corresponding first bed board (2) or third bed board (4) by bolts.

6. A foldable, lightweight, and space-confined transport bed for critically injured patients according to claim 5, characterized in that: The first angle support rod (22) has a guide U-shaped groove (25) in the middle. Multiple clamping grooves (26) are equally spaced along the length direction in the guide U-shaped groove (25). A column block is fixed at the middle of one end of the second angle support rod (23) near the first angle support rod (22). The column block is slidably connected to the guide U-shaped groove (25) and can be inserted into the clamping groove (26) for positioning. The first bed board (2) raises the upper back panel through the first angle support rod (22) with a maximum raising angle of forty degrees. The third bed board (4) raises the lower body through the first angle support rod (22) with a maximum raising angle of forty-five degrees.

7. The foldable, lightweight, and space-confined transport bed for critically injured patients according to claim 1, characterized in that: The second bed board (3) has an infusion tube (12) in the middle of one end. A support block (10) is fixed at one end of the infusion tube (12). The support block (10) is fixedly connected to the second reinforcing rod (9) by bolts. An infusion tube angle valve (11) is provided at the connection position between the infusion tube (12) and the main support column (1). The infusion tube angle valve (11) is fixedly connected to the main support column (1) by bolts.

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