Self-adaptive supporting assembly and spinal cord injury patient body position transferring device and method

Abstract

The invention discloses a self-adaptive supporting assembly and a spinal cord injury patient body position transferring device and method, and belongs to the field of medical auxiliary equipment. The problems that in the body position transferring process of an existing wheelchair, dynamic height collapse is generated when the gravity center laterally moves due to elastic deformation of tires, and the wheelchair and a bed body are separated due to the fact that rigid lateral locking is lacked are solved. According to the technical scheme, the wheelchair bed is characterized by comprising a bed body and a wheelchair, a bottom plate with rollers (the rotating direction is perpendicular to driving wheels) is arranged at the bottom of the wheelchair, a motor drives a threaded rod mechanism to push the bottom plate to move downwards, the driving wheels of the wheelchair are jacked up and suspended, and flexible tire supporting is converted into rigid mechanical supporting. The wheelchair and the bed body are mechanically interlocked through the movable armrests in cooperation with a positioning frame and a positioning groove at the bottom of the bed body. The device eliminates elastic settlement during load transfer, ensures absolute stability of a transfer plane, and enables a patient with spinal cord injury to safely and independently complete'zero-clearance 'translation in cooperation with a body position adjusting mechanism.

Description

Technical Field

[0001] This invention belongs to the field of medical assistive device technology, and in particular relates to an adaptive support component and a device and method for transferring the body position of patients with spinal cord injury. Background Technology

[0002] Positional transfer of patients with spinal cord injuries is a frequent scenario in daily care. In current technology, the docking of wheelchairs and beds mainly relies on the wheelchair's handbrake and manual visual height alignment. However, this traditional docking method has a long-overlooked physical defect—"load-induced dynamic deviation".

[0003] Wheelchairs rely on inflatable or elastic tires for support and possess inherent compressive elasticity. In static alignment, the wheelchair and bed may be at the same height. However, when the patient begins to move towards the bed, the center of gravity shifts dramatically laterally, causing the tire closer to the bed to bear several times the load and undergo compressive deformation, while the other tire rebounds. This "unilateral settlement" instantly disrupts the previously flush mating surfaces, creating a "height difference step" that hinders sliding. Simultaneously, the elastic creep of the tire sidewalls causes unexpected, minute separations (i.e., "dynamic gaps") between the wheelchair and the bed when subjected to lateral thrust from the patient.

[0004] For spinal cord injury patients who lack core muscle control, such minor collapses and gaps can easily lead to instability, causing falls or failure to transfer independently due to fear. Summary of the Invention

[0005] The purpose of this invention is to provide an adaptive support component and a device and method for transferring the body position of patients with spinal cord injury, thereby solving the existing technical problems.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0007] An adaptive support assembly includes: a bed frame and a wheelchair disposed on one side of the bed frame, the wheelchair including a main body, leg rests and a backrest, the leg rests and backrest being rotatable on both sides of the main body;

[0008] The bottom of the main body is provided with a base plate, and the surface of the base plate is provided with multiple through mounting holes. Rollers are rotatably connected in each mounting hole. The rotation direction of the rollers is perpendicular to the rotation direction of the wheelchair drive wheels. Insert rods are fixedly connected to the corners of the base plate and inserted into the bottom of the main body. A middle plate is fixed in the middle of the main body. A drive mechanism for moving the base plate is provided between the middle plate and the base plate.

[0009] It also includes a positioning mechanism for connecting the wheelchair and the bed.

[0010] Furthermore, the drive mechanism includes a motor and a threaded sleeve. The threaded sleeve is fixed to the surface of the base plate, and a threaded rod is threadedly connected inside the threaded sleeve. The threaded rod rotates through the intermediate plate. The motor is fixed to the surface of the intermediate plate, and a worm gear is fixedly connected to one end of the motor output shaft. A worm wheel is fixedly connected to the circumference of the threaded rod, and the worm wheel meshes with the worm gear.

[0011] Furthermore, a gearbox is fixedly connected to the surface of the intermediate plate, and both the worm gear and the worm are located inside the gearbox. The worm rotates through the gearbox.

[0012] Furthermore, the positioning mechanism includes a positioning frame fixed to the bottom of the bed and two fixed shafts. The fixed shafts are all fixed to one side of the main body. Rotating plates are rotatably fitted around the circumference of the fixed shafts. Movable armrests are fixedly connected between the rotating plates. A positioning groove for cooperating with the movable armrest is opened at the center of the bottom of the positioning frame. A downwardly extending limiting part is integrally formed at the bottom of the positioning frame for limiting the movable armrest. The limiting part is located on the side of the positioning frame away from the wheelchair. The positioning mechanism also includes a positioning component for positioning the movable armrest.

[0013] Furthermore, the positioning component includes two guide plates and two pairs of insertion holes. A through slide rod is slidably connected to one side of each of the two guide plates. A connecting plate is fixedly connected between one end of the slide rod. A spring is installed between the connecting plate and the movable handrail through a spring seat. The two pairs of insertion holes are respectively opened on the circumference of the fixed shaft. The same pair of insertion holes are arranged vertically so that the movable handrail is in a horizontal or vertical state.

[0014] Furthermore, one end of the movable handrail is provided with a slide rail, and a slider is slidably connected in the slide rail. An ultrasonic sensor is fixedly connected to the top of the slider to detect the distance between the movable handrail and the positioning frame. One side of the movable handrail is provided with a strip-shaped perforation communicating with the slide rail, and one side of the slider is threaded with a set screw, which is located in the strip-shaped perforation.

[0015] Furthermore, a battery and a controller are fixedly installed on the bottom inner wall of the main body, and a fixed handrail is fixedly installed on the side of the main body away from the movable handrail. A control handle and control buttons are installed on the top of the fixed handrail.

[0016] Furthermore, a vertical plate is fixedly connected to the surface of the intermediate plate, and electric push rods are fixedly connected to both sides of the vertical plate. The output end of each electric push rod is rotatably connected to a support rod, and the two support rods are rotatably connected to the leg rest and the backrest, respectively.

[0017] The present invention also proposes a positional transfer device for patients with spinal cord injury, including an adaptive support component.

[0018] The present invention also proposes a method for using a position transfer device for patients with spinal cord injury, comprising the following steps:

[0019] S1: The patient sits on the main body of the wheelchair and can move using the drive wheels on both sides. When it is necessary to transfer to the bed, move the wheelchair to the side of the bed and keep a certain distance. Then pull the connecting plate to disengage the slide bar from one of the sockets. Then rotate the movable armrest to place it horizontally. Finally, insert the slide bar into the horizontal socket to facilitate the transfer of the patient.

[0020] S2: Align the side of the wheelchair with the bed frame, start the motor, and the motor drives the threaded rod to rotate through the worm gear and worm. The threaded rod causes the threaded sleeve to push the base plate downward until the drive wheels on the wheelchair are completely out of contact with the ground. This changes the wheelchair's support method from flexible tire support to rigid base plate support, eliminating the elastic settlement of the tires caused by lateral load shifting during subsequent transfers. Then, pull the bed frame to bring the wheelchair closer to the bed frame. When the movable armrests touch the limit part on the positioning frame, it indicates that the wheelchair has moved into position.

[0021] S3: Continue driving to raise the wheelchair, causing the movable armrests to enter the positioning slots and form a rigid interlock, preventing the wheelchair from separating from the bed or causing relative displacement when subjected to lateral force. At the same time, due to the angle setting of the rollers, there will be no back-and-forth movement. Meanwhile, the ultrasonic sensor can detect the distance between it and the positioning frame, and then the motor stops after the set distance is reached, so that the top of the wheelchair body and the surface of the bed remain geometrically level on the basis of a rigid plane, which facilitates transfer.

[0022] S4: Finally, activate the electric push rod to first raise the leg rest so that the legs are raised. Then, pull the leg discs towards the body and lower the backrest. This allows the patient to roll onto the bed on a rigid plane that eliminates height differences. When transferring to the wheelchair, the backrest and leg rest are horizontal with the main body and located on one side of the bed, making the transfer more convenient.

[0023] The embodiments of the present invention have the following beneficial effects:

[0024] In this invention, a drive mechanism pushes the base plate downward, forcing the wheelchair's elastic drive wheels off the ground, thus changing the wheelchair's support method from "flexible tire support" to "rigid base plate support." This design completely eliminates tire compression deformation caused by the patient's lateral shift of center of gravity, ensuring that the height difference between the wheelchair body and the bed remains constant throughout the entire position transfer process, preventing "dynamic sinking" and providing the patient with an absolutely stable translational plane.

[0025] In this invention, a "lateral rigid interlocking" mechanism is constructed by utilizing rollers on the base plate whose rotation direction is perpendicular to the drive wheels, combined with the limiting part and positioning groove design of the positioning frame. After the drive wheels are suspended in the air, the rollers allow the wheelchair to perform slight lateral automatic alignment, and then mechanically lock in place by engaging the positioning groove through the movable armrests. This not only achieves precise positioning, but more importantly, when the patient applies lateral thrust, the mechanical structure resists the reaction force, preventing the wheelchair from separating from the bed.

[0026] This invention integrates a posture conversion function, using an electric push rod to link the leg rest and backrest, converting the seated wheelchair into a horizontal stretcher state. Combined with the aforementioned rigid support and height alignment, this eliminates the need for the patient to resist gravity and lift their body; they only need to roll or translate on the same rigid plane, significantly reducing the physical barrier to independent transfer and the risk of falls for spinal cord injury patients.

[0027] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0030] Figure 2 This is a schematic cross-sectional view of the bed structure according to an embodiment of the present invention;

[0031] Figure 3 This is a schematic cross-sectional view of a wheelchair according to an embodiment of the present invention;

[0032] Figure 4 This is an embodiment of the present invention. Figure 3 Another perspective structural diagram;

[0033] Figure 5 This is a schematic diagram of the movable handrail installation structure according to an embodiment of the present invention;

[0034] Figure 6 This is a schematic cross-sectional view of the intermediate plate according to an embodiment of the present invention.

[0035] In the diagram: 1. Bed frame; 2. Wheelchair; 3. Positioning frame; 4. Positioning groove; 5. Limiting part; 6. Main body; 7. Leg rest; 8. Backrest; 9. Middle plate; 10. Upright plate; 11. Electric push rod; 12. Support rod; 13. Fixed armrest; 14. Base plate; 15. Battery; 16. Controller; 17. Movable armrest; 18. Fixed shaft; 19. Rotating plate; 20. Guide plate; 21. Slide rod; 22. Connecting plate; 23. Insertion hole; 24. Spring; 25. Slide rail; 26. Slider; 27. Ultrasonic sensor; 28. Set screw; 29. ​​Mounting hole; 30. Roller; 31. Insert rod; 32. Threaded sleeve; 33. Threaded rod; 34. Gearbox; 35. Worm gear; 36. Worm wheel; 37. Motor. Detailed Implementation

[0036] 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] To keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and known components are omitted.

[0038] In one embodiment, please refer to Figures 1-6 As shown, this embodiment provides an adaptive support component, including: a bed 1 and a wheelchair 2. A positioning frame 3 is fixed to the bottom of the bed 1 near the wheelchair 2 and is fixed to the bottom of the bed 1 by bolts. A positioning groove 4 is provided at the center of the bottom of the positioning frame 3. At the same time, a downwardly extending limiting part 5 is integrally formed at the bottom of the positioning frame 3. The limiting part 5 is located on the side of the positioning frame 3 away from the wheelchair 2 and is a baffle perpendicular to the vertical section of the positioning frame 3, which is used to limit the movement of the wheelchair 2.

[0039] The wheelchair 2 includes a main body 6, a leg rest 7, and a backrest 8. The main body 6 is the frame structure for the patient to sit on, with a seat cushion on top. The leg rest 7 and the backrest 8 are rotatably connected to both sides of the main body 6 via a pivot. The leg rest 7 is located at the end of the main body 6 closest to the patient's legs, and the backrest 8 is located at the end of the main body 6 closest to the patient's back. Both can rotate around the pivot to adjust the patient's sitting or lying posture. When the backrest 8, the main body 6, and the leg rest 7 are horizontal, it facilitates the patient's movement. A horizontally positioned intermediate plate 9, made of metal, is welded to the center of the main body 6. This intermediate plate is used to install the drive mechanism and posture adjustment components. A vertically positioned upright plate 10 is also fixed to the upper surface of the intermediate plate 9 by bolts. The upright plate 10 is located on the side of the intermediate plate 9 closest to the backrest 8 and leg rest 7. Electric push rods 11 are fixed to both sides of the upright plate 10 by bolts. The output ends of the electric push rods 11 face away from the upright plate 10. Each output end of the electric push rod 11 is rotatably connected to a support rod 12 via a pin. One end of the support rod 12 away from the electric push rod 11 is rotatably connected to the bottom of the leg rest 7 via a pin, and the other end of the support rod 12 away from the electric push rod 11 is rotatably connected to the back of the backrest 8 via a pin. By extending or retracting the output ends of the electric push rods 11, the support rods 12 can be rotated, thereby raising or lowering the leg rest 7 and flattening or raising the backrest 8.

[0040] A fixed armrest 13 is welded to the side of the main body 6 away from the movable armrest 17 for easy gripping by the patient. A control handle and control buttons are installed on the top of the fixed armrest 13. The control handle controls the rotation of the wheelchair's drive wheels to move the wheelchair forward and backward. The control buttons include a start / stop button for the motor 37 and a lift / lower button for the electric push rod 11, facilitating operation of various components by the patient or caregiver. A battery 15 and a controller 16 are bolted to the bottom inner wall of the main body 6. The battery 15 is a rechargeable lithium battery, electrically connected to the motor 37, electric push rod 11, ultrasonic sensor 27, and controller 16 via wires to power these components. The controller 16 is a conventional microcontroller, electrically connected to the motor 37, electric push rod 11, and ultrasonic sensor 27 via wires to receive detection signals from the ultrasonic sensor 27.

[0041] The wheelchair 2 is also equipped with a movable armrest 17 on the side near the bed 1. The movable armrest 17 can rotate and can be lowered to facilitate the patient's transfer between the wheelchair 2 and the bed 1. Two rotating plates 19 are fixedly connected to one side of the armrest 17. The two rotating plates 19 are respectively fitted on the circumference of two fixed shafts 18. The fixed shafts 18 are cylindrical metal shafts with both ends welded to the frame of the main body 6 on the side near the bed 1. The rotating plates 19 can rotate freely around the fixed shafts 18, thereby driving the movable armrest 17 to rotate.

[0042] In another embodiment: refer to Appendix Figures 1-6An adaptive support component.

[0043] To fix the rotational position of the movable handrail 17, a positioning component is also provided. The positioning component includes two guide plates 20 and two pairs of insertion holes 23. The two guide plates 20 are respectively welded to the side walls of the two rotating plates 19. Each guide plate 20 has a horizontally penetrating sliding hole. A sliding rod 21 slides through the sliding hole. One end of the sliding rod 21 extends out of the guide plate 20 towards the fixed shaft 18, and the other end is welded and fixed to the connecting plate 22. The connecting plate 22 is a metal connecting rod, which is horizontally set between the two sliding rods 21 and connects the two sliding rods 21 into one piece. A spring is also installed between the connecting plate 22 and the movable handrail 17 through a spring seat. 24. The spring seats are fixed on the side wall of the connecting plate 22 and the circumference of the movable handrail 17 respectively. In the natural state of the spring 24, the end of the slide rod 21 facing the fixed shaft 18 will be inserted into the insertion hole 23. Two pairs of insertion holes 23 are respectively opened on the circumference of the two fixed shafts 18. The two insertion holes 23 on the same fixed shaft 18 are vertically arranged. One of them is opened along the horizontal direction of the fixed shaft 18, and the other is opened along the vertical direction of the fixed shaft 18. When the slide rod 21 is inserted into the horizontal insertion hole 23, the movable handrail 17 is in a horizontal state. When the slide rod 21 is inserted into the vertical insertion hole 23, the movable handrail 17 is in a vertical state.

[0044] One end of the movable armrest 17 is also provided with a slide rail 25, in which a slider 26 is slidably connected. An ultrasonic sensor 27 is fixed to the top of the slider 26 by bolts. The probe of the ultrasonic sensor 27 faces the positioning frame 3 and is used to detect the distance between the movable armrest 17 and the positioning frame 3. A strip-shaped perforation communicating with the slide rail 25 is also provided on one side of the movable armrest 17. The strip-shaped perforation is set along the length of the movable armrest 17. A set screw 28 is threaded to one side of the slider 26. One end of the set screw 28 passes through the strip-shaped perforation and extends out of the outside of the movable armrest 17. When it is necessary to adjust the position of the ultrasonic sensor 27, loosen the set screw 28, push the slider 26 to slide in the slide rail 25 to the appropriate position, and then tighten the set screw 28 to fix the slider 26 in the current position. By adjusting the height of the ultrasonic sensor 27, it can be easily adapted to bed frames 1 of different thicknesses, making it more flexible to use.

[0045] The bottom of the main body 6 is provided with a base plate 14, which is a rectangular metal plate with multiple through mounting holes 29 on its surface. The mounting holes 29 are evenly distributed around the perimeter of the base plate 14. Each mounting hole 29 is rotatably connected to a roller 30 through a bearing. The rotation direction of the roller 30 is perpendicular to the rotation direction of the drive wheel of the wheelchair 2, so that the wheelchair 2 will not move back and forth after the drive wheel of the wheelchair 2 is raised. A plug rod 31 is also welded at each of the four corners of the base plate 14. The plug rod 31 is set vertically upward. The bottom of the main body 6 has a slot corresponding to the position of the plug rod 31. The plug rod 31 is inserted into the slot and can slide up and down along the slot to guide the up and down movement of the base plate 14.

[0046] A drive mechanism for moving the base plate 14 is provided between the intermediate plate 9 and the base plate 14. This drive mechanism includes a motor 37 and a threaded sleeve 32. The threaded sleeve 32 is a metal sleeve with internal threads, welded to the center of the upper surface of the base plate 14. A threaded rod 33 is connected to the internal thread of the threaded sleeve 32. The threaded rod 33 is vertically positioned, and its top end rotates through the intermediate plate 9. A hole is provided in the intermediate plate 9 corresponding to the position of the threaded rod 33, and a bearing is installed in the hole. The threaded rod 33 passes through the inner ring of the bearing. A gearbox 34 is fixed to the upper surface of the intermediate plate 9 by bolts. The gearbox 34 is a closed metal housing containing a worm gear 36 and a worm 35. The worm gear 36 is fixedly sleeved on the circumference of the threaded rod 33, located at the tooth... Inside the wheel box 34, a worm gear 35 is horizontally positioned, with one end rotatably connected to the inner wall of the wheel box 34 via a bearing, and the other end rotatably passing through the other side wall of the wheel box 34 and extending out of the wheel box 34. A motor 37 is fixed to the upper surface of the intermediate plate 9 by bolts, located on one side of the wheel box 34. The output shaft of the motor 37 is fixedly connected to the end of the worm gear 35 extending out of the wheel box 34 via a coupling. When the motor 37 starts, it can drive the worm gear 35 to rotate, which in turn drives the threaded rod 33 to rotate through the worm wheel 36. When the threaded rod 33 rotates, the threaded sleeve 32, guided by the insertion rod 31, can drive the base plate 14 to move, so that the top of the main body 6 of the wheelchair 2 can be flush with the surface of the bed 1, facilitating patient transfer.

[0047] The present invention also proposes a positional transfer device for patients with spinal cord injury, including an adaptive support component.

[0048] The present invention also proposes a method for using a position transfer device for patients with spinal cord injury, comprising the following steps:

[0049] S1: The patient sits on the main body of the wheelchair 2 and can move by the drive wheels on both sides. When it is necessary to transfer to the bed 1, move the wheelchair 2 to the side of the bed 1 and keep a certain distance. Then pull the connecting plate 22 to disengage the slide bar 21 from one of the sockets 23. Then rotate the movable armrest 17 to place it horizontally. Then insert the slide bar 21 into the horizontal socket 23 to facilitate the transfer of the human body.

[0050] S2: Align the side of wheelchair 2 with bed 1, start motor 37. Motor 37 drives threaded rod 33 to rotate through worm gear 36 and worm 35. Threaded rod 33 causes threaded sleeve 32 to push the base plate 14 downward. After the drive wheels on wheelchair 2 are out of contact with the ground, pull bed 1 to bring wheelchair 2 closer to bed 1. When movable armrest 17 touches the limiting part 5 on positioning frame 3, it indicates that wheelchair 2 has moved into position.

[0051] S3: Continue driving to raise wheelchair 2, causing movable armrest 17 to enter positioning groove 4. At this time, movable armrest 17 and positioning groove 4 form a rigid engagement, locking the wheelchair and bed frame together and eliminating the relative displacement freedom between them. At the same time, due to the angle setting of roller 30 (perpendicular to the drive wheel), the wheelchair can make slight lateral adjustments during docking to adapt to the distance to the bedside, while providing great frictional resistance in the front-back direction, further enhancing the stability of docking. Meanwhile, ultrasonic sensor 27 can detect the distance between itself and positioning frame 3, and then motor 37 stops after reaching the set distance, ensuring that the rigid plane of wheelchair body 6 and the surface of bed frame 1 are on the same geometric level, and that this level will not tilt due to subsequent patient movement;

[0052] S4: Finally, activate the electric push rod 11 to first raise the leg rest 7, thus raising the legs. Then, pull the leg discs towards the body, lower the backrest 8, and roll the body onto the bed 1. When transferring to the wheelchair 2, because the backrest 8, leg rest 7, and main body 6 are horizontal and located on one side of the bed 1, and thanks to the aforementioned rigid support structure, the patient will not feel any height difference or equipment swaying when rolling over the seam between the wheelchair and the bed, making the transfer more convenient.

[0053] It should be noted that in the description of this specification, descriptions such as "first" and "second" are only used to distinguish the features and do not have any actual order or directional meaning. This application is not limited to this.

[0054] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An adaptive support component, characterized in that, include: A bed (1) and a wheelchair (2) disposed on one side of the bed (1), the wheelchair (2) comprising a main body (6), a leg rest (7) and a backrest (8), the leg rest (7) and the backrest (8) being rotatable on both sides of the main body (6); The bottom of the main body (6) is provided with a base plate (14), and the surface of the base plate (14) is provided with multiple through mounting holes (29). Rollers (30) are rotatably connected in each mounting hole (29). The rotation direction of the rollers (30) is perpendicular to the rotation direction of the drive wheel of the wheelchair (2). Insert rods (31) are fixedly connected at the corners of the base plate (14). Insert rods (31) are inserted into the bottom of the main body (6). A middle plate (9) is fixed in the middle of the main body (6). A drive mechanism for moving the base plate (14) is provided between the middle plate (9) and the base plate (14). It also includes a positioning mechanism for connecting the wheelchair (2) and the bed (1).

2. The adaptive support component as described in claim 1, characterized in that, The drive mechanism includes a motor (37) and a threaded sleeve (32). The threaded sleeve (32) is fixed to the surface of the base plate (14). A threaded rod (33) is threadedly connected inside the threaded sleeve (32). The threaded rod (33) rotates through the intermediate plate (9). The motor (37) is fixed to the surface of the intermediate plate (9). A worm gear (35) is fixedly connected to one end of the output shaft of the motor (37). A worm wheel (36) is fixedly connected to the circumference of the threaded rod (33). The worm wheel (36) meshes with the worm gear (35).

3. The adaptive support component as described in claim 2, characterized in that, A gearbox (34) is fixedly connected to the surface of the intermediate plate (9). The worm gear (36) and the worm (35) are both located inside the gearbox (34). The worm (35) rotates through the gearbox (34).

4. The adaptive support component as described in claim 1, characterized in that, The positioning mechanism includes a positioning frame (3) fixed to the bottom of the bed (1) and two fixed shafts (18). The fixed shafts (18) are all fixed to one side of the main body (6). Rotating plates (19) are rotatably sleeved on the circumference of the fixed shafts (18). Movable armrests (17) are fixedly connected between the rotating plates (19). A positioning groove (4) for cooperating with the movable armrests (17) is opened at the center of the bottom of the positioning frame (3). A downwardly extending limiting part (5) is integrally formed at the bottom of the positioning frame (3) for limiting the movable armrests (17). The limiting part (5) is located on the side of the positioning frame (3) away from the wheelchair (2). The positioning mechanism also includes a positioning component for positioning the movable armrests (17).

5. An adaptive support component as described in claim 4, characterized in that, The positioning component includes two guide plates (20) and two pairs of insertion holes (23). A through slide rod (21) is slidably connected to one side of each of the two guide plates (20). A connecting plate (22) is fixedly connected between one end of the slide rod (21). A spring (24) is installed between the connecting plate (22) and the movable handrail (17) through a spring seat. The two pairs of insertion holes (23) are respectively opened on the circumference of the fixed shaft (18). The same pair of insertion holes (23) are arranged vertically so that the movable handrail (17) is in a horizontal or vertical state.

6. An adaptive support component as described in claim 5, characterized in that, One end of the movable handrail (17) is provided with a slide rail (25), and a slider (26) is slidably connected in the slide rail (25). An ultrasonic sensor (27) is fixedly connected to the top of the slider (26) to detect the distance between the movable handrail (17) and the positioning frame (3). A strip-shaped perforation communicating with the slide rail (25) is provided on one side of the movable handrail (17), and a set screw (28) is threadedly connected to one side of the slider (26). The set screw (28) is located in the strip-shaped perforation.

7. An adaptive support component as described in claim 6, characterized in that, A battery (15) and a controller (16) are fixedly installed on the bottom inner wall of the main body (6). A fixed handrail (13) is fixedly installed on the side of the main body (6) away from the movable handrail (17). A control handle and a control button are installed on the top of the fixed handrail (13).

8. An adaptive support component as described in claim 6, characterized in that, The surface of the intermediate plate (9) is fixedly connected to a vertical plate (10), and electric push rods (11) are fixedly connected to both sides of the vertical plate (10). The output end of the electric push rods (11) is rotatably connected to a support rod (12), and the two support rods (12) are rotatably connected to the leg support (7) and the backrest (8) respectively.

9. A position transfer device for patients with spinal cord injury, characterized in that, Includes the adaptive support component as described in any one of claims 1-8.

10. The method of using the spinal cord injury patient positioning transfer device as described in claim 9, characterized in that, Includes the following steps: S1: The patient sits on the main body of the wheelchair (2) and can move by the drive wheels on both sides. When it is necessary to transfer to the bed (1), move the wheelchair (2) to the side of the bed (1) and keep a certain distance. Then pull the connecting plate (22) to disengage the slide bar (21) from one of the sockets (23). Then rotate the movable armrest (17) to place it horizontally. Then insert the slide bar (21) into the horizontal socket (23) to facilitate the transfer of the human body. S2: Align the side of the wheelchair (2) with the bed (1), start the motor (37), the motor (37) drives the threaded rod (33) to rotate through the worm gear (36) and worm (35), and the threaded sleeve (32) pushes the base plate (14) downward through the threaded rod (33) until the drive wheels on the wheelchair (2) are completely out of contact with the ground, and the support method of the wheelchair (2) is changed from the flexible support of the tires to the rigid support of the base plate (14) to eliminate the elastic settlement of the tires caused by the load side shift during subsequent transfer; then pull the bed (1) to make the wheelchair (2) close to the bed (1), and when the movable armrest (17) touches the limit part (5) on the positioning frame (3), it means that the wheelchair (2) has moved into place; S3: Continue driving to raise the wheelchair (2), so that the movable armrest (17) enters the positioning groove (4) to form a rigid interlock, preventing the wheelchair from separating from the bed or causing relative displacement when subjected to lateral force. At the same time, due to the angle setting of the roller (30), there will be no forward or backward movement. Meanwhile, the ultrasonic sensor (27) can detect the distance between it and the positioning frame (3), and then the motor (37) stops after reaching the set distance, so that the top of the wheelchair (2) body (6) and the surface of the bed (1) remain geometrically level on the basis of a rigid plane, which facilitates transfer. S4: Finally, start the electric push rod (11), first control the leg support (7) to lift up the legs, then pull the leg plate towards the body, and then lower the backrest (8) so that the patient can roll the body onto the bed (1) on a rigid plane that eliminates the height difference step. When transferring to the wheelchair (2), the transfer is more convenient because the backrest (8), leg support (7) and main body (6) are horizontal and located on one side of the bed (1).

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