Prone position auxiliary device used after retina operation
By designing a post-retinal prone assist device that includes motor drive and rack-and-plate linkage, the problem of insufficient comfort and stability in the prone position is solved, and higher comfort and recovery effects are achieved.
Patent Information
- Application Number
- CN202411767669.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-03-04
AI Technical Summary
After retinal surgery, it is difficult for patients to maintain for a long time in a prone position, resulting in physical discomfort and fatigue. Traditional auxiliary devices have shortcomings in comfort, stability and body support.
A prone position auxiliary device after retinal surgery is designed, including a bed plate, a base plate, a support rod, a silicone face support, a driving device and an adjustment mechanism. Through the motor drive and the linkage of the gear rack and rack, the height adjustment of the buffer pressure reduction pad, the silicone face support and the support rod, as well as the adjustment of the knee bracket and foot support.
It improves the comfort and stability of the patient in the prone position, reduces the risk of pressure ulcers and muscle fatigue, ensures dry face and abdominal comfort, adapts to the physical needs of different patients, and improves the recovery effect after surgery.
Smart Images
Figure CN119548347A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of medical devices, and in particular to a prone position auxiliary device after retinal surgery. Background Art
[0002] The retina is an important part of the eye that receives light and converts it into neural signals. Retinal surgery plays a key role in ophthalmic treatment, such as retinal detachment repair and macular surgery. After the successful completion of such surgery, in order to promote good repositioning and healing of the retina, patients usually need to maintain a specific prone position after surgery. This requirement is based on factors such as the physiological structure of the human body and blood circulation and pressure distribution of the eye. In the prone position, the retina can get relatively better support, reducing the accumulation of fluid under the retina, which is beneficial to the postoperative recovery process such as the adhesion of the retina to the choroid and the closure of retinal holes.
[0003] Retinal surgery is a common type of surgery in ophthalmology. After surgery, patients usually need to maintain a specific prone position to promote the repositioning and recovery of the retina. However, maintaining a prone position for a long time is very painful and difficult for patients, which can easily cause physical discomfort and fatigue in patients, and even affect the effect of the surgery. Some traditional auxiliary devices are insufficient in terms of comfort, stability, and support for different parts of the patient's body, and cannot meet the needs of patients after retinal surgery. Summary of the invention
[0004] In view of the deficiencies of the prior art, the present invention provides a prone position assist device after retinal surgery, which solves the problem that the patient's needs for comfort, stability and body support cannot be met.
[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a prone position auxiliary device after retinal surgery, comprising a bed board, a bottom plate is provided at one end of the upper surface of the bed board, a limiting block is fixedly connected to the middle part of the bottom plate, a groove is provided on the upper surface of the bottom plate, a plurality of support rods are slidably connected in the groove of the bottom plate, a silicone face rest is fixedly connected to the top end of the support rod, a ventilation cavity is provided in the middle part of the silicone face rest, a neck groove is provided on the top of one of the silicone face rests, a shell 2 is fixedly connected to the lower surface of the bed board, a rotating shaft 1 is provided inside the shell 2, a worm 2 is fixedly connected to one end of the rotating shaft 1, a worm 2 is meshingly connected to the tooth end of the worm 2 with a worm wheel 2, a screw 2 is threadedly connected to the middle part of the worm wheel 2, the top end of the screw 2 passes through the bed board and is fixedly connected to the bottom end of the bottom plate, and a driving device is fixedly connected to the lower surface of the bed board.
[0006] Preferably, the driving device includes a shell 1, a motor is arranged inside the shell 1, a rotating shaft 1 is fixedly arranged at the output end of the motor, one end of the rotating shaft 1 is fixedly connected to a worm 1, the tooth end of the worm 1 is meshingly connected to a worm wheel 1, the middle part of the worm wheel 1 is threadedly connected to a screw 1, the top end of the screw 1 passes through the bed board and is fixedly connected to a buffering and decompression pad, the outer wall of the rotating shaft 1 is rotatably connected to a bearing seat, the top end of the bearing seat is fixedly connected to a fixing seat, and the top end of the fixing seat is fixedly connected to the lower surface of the bed board.
[0007] Preferably, both side walls of the buffer and decompression pad are provided with air holes, the top of the buffer and decompression pad is provided with an abdominal decompression hole, and the bottom end of the buffer and decompression pad is provided on the upper surface of the bed board.
[0008] Preferably, a plurality of longitudinal movement grooves are provided at one end of the middle portion of the upper surface of the bed board, a placement cavity is provided inside the bed board, and an adjustment mechanism is provided in the placement cavity of the bed board.
[0009] Preferably, the adjustment mechanism includes a gear, the bottom end of the gear is fixedly connected to bevel gear 2, the tooth end of bevel gear 2 is meshingly connected to bevel gear 1, one end of bevel gear 1 passes through the bed board and is fixedly connected to rotating shaft 2, one end of rotating shaft 2 is fixedly connected to a handwheel, and the top of the handwheel is fixedly connected to a turning handle.
[0010] Preferably, the tooth end of the gear is meshingly connected to two racks, one end of the rack is fixedly connected to a slide groove, the interior of the slide groove is slidably connected to a slider 2, the top of the slider 2 is fixedly connected to a knee support, the bottom end of the knee support is arranged on the upper surface of the bed board, and the outer wall of the slider 2 slides on the outside of the bed board.
[0011] Preferably, the other end of the slide groove is slidably connected to a slider 1, the top of the slider 1 is fixedly connected to a foot rest, the bottom end of the foot rest is arranged on the upper surface of the bed board, and the outer wall of the slider 1 slides on the outside of the bed board.
[0012] A method for a prone position assist device after retinal surgery, comprising the following steps:
[0013] S1, starting the motor (22), driving the rotating shaft 1 (17), the worm 1 (23), the worm 2 (25), the worm wheel 1 (24), and the worm wheel 2 (26) to rotate, and the rotation of the worm wheel 1 (24) and the worm wheel 2 (26) drives the screw 1 (16) and the screw 2 (27) to rotate and rise;
[0014] S2, rotating the hand wheel (11) to rotate the second rotating shaft (31) to drive the bevel gear (34), the second bevel gear (35) and the gear (33), and the gear (33) rotates to drive the rack (32) to move, and the knee support (9) and the foot support (10) can be adjusted during the rotation.
[0015] Working principle: When the motor starts, it drives the shaft 1 to rotate, and the worm 1 at the end of the shaft 1 rotates the worm gear 1. The worm gear 1 realizes the lifting and lowering of the buffer pressure relief pad through the screw 1 connected by the thread, which is used to adjust the height of the abdominal support. At the same time, the worm 2 at the other end of the shaft 1 rotates the worm gear 2, and the worm gear 2 drives the screw 2 to move up and down, thereby adjusting the height of the bottom plate, and the support rod and the silicone face support on the bottom plate rise and fall accordingly. While the bottom plate rises, the support rod in the bottom plate groove can move and shrink along the arc groove to adapt to different face shapes. The ventilation cavity of the silicone face support can keep the face dry, and the neck groove can adapt to the neck position. When the handle is turned to drive the handwheel and the shaft 2 to rotate, the bevel gear 1 meshes with the bevel gear 2 to rotate the gear. The gear meshes with the two racks, pushing the rack to move longitudinally, and the rack drives the slide to move. The slider 2 and the slider 1 in the slide respectively drive the knee support and the foot support to open and close on the bed board to adjust the leg support position, thereby meeting the needs of different patients.
[0016] The present invention provides a prone position assisting device after retinal surgery, which has the following beneficial effects:
[0017] 1. Through the operation of the driving device, the ventilation cavity of the present invention can effectively keep the patient's face dry and reduce the friction caused by sweat accumulation, thereby reducing the risk of pressure sores. At the same time, the air holes can promote air circulation inside and outside the cushion and reduce pressure, avoiding the adverse effects of the hot and humid environment on the patient's skin. The design of the abdominal pressure relief hole helps to reduce abdominal pressure, promote smooth breathing and normal gastrointestinal peristalsis of the patient, thereby improving the comfort of the patient when lying prone.
[0018] 2. The present invention provides a stable support structure for the silicone face support through the operation of the bottom plate and the support rod. This design ensures that when the patient's head moves or the bed shakes slightly, the silicone face support can still maintain a relatively stable position to avoid large deviations or tilts, thereby ensuring the safety and support of the patient's face.
[0019] 3. Through the operation of the adjustment mechanism, different patients may need to maintain different leg postures, specific bending or extension degrees during the retinal surgery recovery process. The adjustment mechanism can adjust the knee support and foot support to the corresponding position, accurately stabilize the patient's leg posture, provide patients with more comprehensive and more stable auxiliary support, and be more conducive to recovery after retinal surgery. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a three-dimensional schematic diagram of the present invention;
[0021] Figure 2 It is a side perspective schematic diagram of the present invention;
[0022] Figure 3It is a partial three-dimensional schematic diagram of the buffer pressure relief pad of the present invention;
[0023] Figure 4 It is a partial three-dimensional schematic diagram of the silicone face support of the present invention;
[0024] Figure 5 It is a partial three-dimensional schematic diagram of the knee support of the present invention;
[0025] Figure 6 It is a partial three-dimensional schematic diagram of the gear of the present invention;
[0026] Figure 7 It is a three-dimensional schematic diagram of the cross-sectional structure of the bed board of the present invention.
[0027] Among them, 1. bed board; 2. silicone face support; 3. ventilation cavity; 4. neck groove; 5. bottom plate; 6. buffer pressure relief pad; 7. abdominal pressure relief hole; 8. longitudinal movement groove; 9. knee support; 10. foot support; 11. hand wheel; 12. handle; 13. support leg; 14. shell one; 15. ventilation hole; 16. screw one; 17. shaft one; 18. bearing seat; 19. fixed seat; 20. shell two; 21. support rod; 22. motor; 23. worm one; 24. worm wheel one; 25. worm two; 26. worm wheel two; 27. screw two; 28. slider one; 29. limit block; 30. slide groove; 31. shaft two; 32. rack; 33. gear; 34. bevel gear one; 35. bevel gear two; 36. slider two; 37. placement cavity. DETAILED DESCRIPTION
[0028] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0029] Example:
[0030] Please see attached Figure 1 -Attached Figure 4The embodiment of the present invention provides a bed board 1 having a bottom plate 5 disposed at one end of the upper surface, a limited block 29 fixedly connected to the middle of the bottom plate 5, a groove disposed on the upper surface of the bottom plate 5, a plurality of support rods 21 slidably connected in the groove of the bottom plate 5, a silicone face support 2 fixedly connected to the top of the support rod 21, a ventilation cavity 3 disposed in the middle of the silicone face support 2, a neck groove 4 disposed at the top of one of the silicone face supports 2, a shell 20 fixedly connected to the lower surface of the bed board 1, a rotating shaft 17 disposed inside the shell 20, a worm 25 fixedly connected to one end of the rotating shaft 17, a worm gear 26 meshingly connected to the tooth end of the worm 25, a screw 27 threadedly connected to the middle of the worm gear 26, a top end of the screw 27 penetrating the bed board 1 and fixedly connected to the bottom end of the bottom plate 5, and a lower surface of the bed board 1 fixedly connected to the A driving device is connected; the driving device includes a shell 14, a motor 22 is arranged inside the shell 14, a rotating shaft 17 is fixedly arranged at the output end of the motor 22, one end of the rotating shaft 17 is fixedly connected to a worm 23, the tooth end of the worm 23 is meshingly connected to a worm wheel 24, the middle part of the worm wheel 24 is threadedly connected to a screw 16, the top end of the screw 16 passes through the bed board 1 and is fixedly connected to a buffering and decompression pad 6, the outer wall of the rotating shaft 17 is rotatably connected to a bearing seat 18, the top end of the bearing seat 18 is fixedly connected to a fixing seat 19, and the top end of the fixing seat 19 is fixedly connected to the lower surface of the bed board 1; the two side walls of the buffering and decompression pad 6 are provided with air holes 15, the top end of the buffering and decompression pad 6 is provided with an abdominal decompression hole 7, and the bottom end of the buffering and decompression pad 6 is arranged on the upper surface of the bed board 1.
[0031] Specifically, the motor 22 is started, driving the rotating shaft 17 to rotate, and the worm 23 at one end of the rotating shaft 17 rotates accordingly. Since the worm 23 is meshed with the worm wheel 24, the worm wheel 24 starts to rotate under the action of the worm 23. The middle part of the worm wheel 24 is threadedly connected with a screw rod 16. As the worm wheel 24 rotates, the screw rod 16 will move upward or downward, and its top end penetrates the bed board 1 and is fixedly connected to the buffer and decompression pad 6, thereby realizing the height adjustment of the buffer and decompression pad 6. At the same time, the height of the bottom plate 5 at one end of the bed board 1 is adjusted by rotating the worm 25 fixedly connected to the other end of the rotating shaft 17, driving the worm wheel 26 meshing with it to rotate, and the screw 27 threadedly connected to the middle part of the worm wheel 26 will move up and down, and the top end of the screw 27 is fixedly connected to the bottom end of the bottom plate 5, thereby realizing the lifting and lowering of the bottom plate 5, and the silicone face support 2 fixed on the top end of the support rod 21 on the bottom plate 5 will also rise and fall accordingly, and a ventilation cavity 3 is provided in the middle part of the silicone face support 2, and a neck groove 4 is provided on the top of one of the silicone face support 2, which provides comfortable and breathable support for the patient's face and can adapt to the neck position requirements of different patients.
[0032] When the screw rod 27 is driven to rotate and lift, the bottom plate 5 connected to the screw rod 27 also rotates, and the three support rods 21 in the groove of the bottom plate 5 slide along the arc groove while rotating, and the silicone face support 2 on the top is driven to shrink while sliding to adapt to people with different face shapes and sizes. The abdominal decompression hole 7 set at the top of the buffering and decompression pad 6 can effectively disperse the abdominal pressure when the patient lies prone, avoiding excessive local pressure in the abdomen. The air holes 15 on the two side walls of the buffering and decompression pad 6 enhance the air permeability of the buffering and decompression pad 6, reducing the stuffy discomfort caused by the patient lying prone for a long time.
[0033] By adjusting the silicone face support 2 and the cushioning and decompression pad 6, it can adapt to patients of different heights, body shapes and face shapes, so that the patient can maintain a natural and comfortable posture when lying prone, reduce muscle fatigue and joint pressure caused by posture discomfort, avoid excessive bending or stretching of the body, and ensure that the force on all parts of the body is uniform. The ventilation cavity 3 of the silicone face support 2, the air permeable holes 15 of the cushioning and decompression pad 6, and the abdominal decompression holes 7 work together to improve the comfort of the patient when lying prone, increase ventilation to keep the face dry, and reduce sweat on the facial skin.
[0034] The problem that traditional prone position assistance methods often lack precise height adjustment function, making it difficult for patients to find the posture that best suits their body, and maintaining it for a long time will cause pain and discomfort in various parts of the body. By driving the motor 22 to adjust the height and contract the silicone face support 2, the patient can easily adjust to a comfortable prone position, thereby improving the patient's tolerance to maintaining this posture for a long time.
[0035] Please see attached Figure 1 , Attachment Figure 5 -Attached Figure 7 A plurality of longitudinal moving grooves 8 are provided at one end of the middle portion of the upper surface of the bed board 1, a placement cavity 37 is provided inside the bed board 1, and an adjustment mechanism is provided in the placement cavity 37 of the bed board 1; the adjustment mechanism comprises a gear 33, the bottom end of the gear 33 is fixedly connected with a bevel gear 2 35, the tooth end of the bevel gear 2 35 is meshingly connected with a bevel gear 1 34, one end of the bevel gear 1 34 passes through the bed board 1 and is fixedly connected with a rotating shaft 2 31, one end of the rotating shaft 2 31 is fixedly connected with a hand wheel 11, the top end of the hand wheel 11 is fixedly connected with a turning handle 12, the tooth end of the gear 33 is meshingly connected with two racks 32, and the racks One end of the slide 32 is fixedly connected with a slide groove 30, and a slider 2 36 is slidably connected inside the slide groove 30, and a knee support 9 is fixedly connected to the top of the slider 2 36, and the bottom end of the knee support 9 is arranged on the upper surface of the bed board 1, and the outer wall of the slider 2 36 slides outside the bed board 1; the other end of the slide groove 30 is slidably connected with a slider 1 28, and the top end of the slider 1 28 is fixedly connected with a foot support 10, and the bottom end of the foot support 10 is arranged on the upper surface of the bed board 1, and the outer wall of the slider 1 28 slides outside the bed board 1; A method for a prone position assisting device after retinal surgery, characterized in that it comprises the following steps:
[0036] S1, starting the motor (22), driving the rotating shaft 1 (17), the worm 1 (23), the worm 2 (25), the worm wheel 1 (24), and the worm wheel 2 (26) to rotate, and the rotation of the worm wheel 1 (24) and the worm wheel 2 (26) drives the screw 1 (16) and the screw 2 (27) to rotate and rise;
[0037] S2, rotating the hand wheel (11) to rotate the second rotating shaft (31) to drive the bevel gear (34), the second bevel gear (35) and the gear (33), and the gear (33) rotates to drive the rack (32) to move, and the knee support (9) and the foot support (10) can be adjusted during the rotation.
[0038] Specifically, when the operator turns the handle 12, the handle 12 drives the hand wheel 11 to rotate, and the hand wheel 11 is fixedly connected to the second rotating shaft 31, so the second rotating shaft 31 rotates accordingly. The bevel gear 1 34 at one end of the second rotating shaft 31 also rotates synchronously, and because the bevel gear 1 34 is meshed with the bevel gear 2 35, the bevel gear 2 35 starts to rotate. The bevel gear 2 35 is fixedly connected to the gear 33, so the gear 33 also rotates. The gear 33 is meshed with the two racks 32, and when the gear 33 rotates, it will push the two racks 32 to move relative or oppositely. Because one end of the rack 32 is fixedly connected to the slide 30, and the slide 30 is slidably connected to the slider 2 36 and the slider 1 28, the top of the slider 2 36 is fixedly connected to the knee support 9, and the top of the slider 1 28 is fixedly connected to the foot support 10, and the outer walls of the slider 2 36 and the slider 1 28 slide on the outside of the bed board 1, the movement of the rack 32 will drive the slide 30 to move, and then the slider 2 36 and the slider 1 28 will respectively carry the knee support 9 and the foot support 10 to open and close on the upper surface of the bed board 1. By controlling the rotation of the hand wheel 11, the size of the opening and closing of the knee support 9 and the foot support 10 can be accurately adjusted.
[0039] Through the adjustment mechanism, the positions of the knee support 9 and the foot support 10 can be flexibly adjusted according to the length of the patient's legs and personal comfort requirements. The knee support 9 and the foot support 10 can be adjusted synchronously and coordinated to ensure that the patient can get appropriate support from the knee to the foot, keep the legs naturally stretched, reduce leg fatigue and discomfort, improve the overall comfort of the patient in the prone position, help the patient to maintain the correct prone position for a long time, and facilitate recovery after retinal surgery. Through the linkage design of slider 1 28, slider 2 36, slide 30 and gear 33, rack 32, the problem of incoordination between the foot support 10 and the knee support 9 is solved, making the leg support more reasonable and more comfortable. The linkage adjustment mechanism of the foot support 10 and the knee support 9 can easily adjust the patient's leg posture to the desired state and fix it, without complicated additional operations or separate adjustments of multiple parts, which improves the convenience and efficiency of medical staff's operation, and also provides patients with a better user experience, which helps patients to better follow the doctor's advice and maintain the correct prone position after surgery.
[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A prone position assisting device after retinal surgery, comprising a bed board (1), characterized in that: A bottom plate (5) is provided at one end of the upper surface of the bed board (1), a limit block (29) is fixedly connected to the middle of the bottom plate (5), a groove is provided on the upper surface of the bottom plate (5), a plurality of support rods (21) are slidably connected in the groove of the bottom plate (5), a silicone face support (2) is fixedly connected to the top of the support rod (21), a ventilation cavity (3) is provided in the middle of the silicone face support (2), a neck groove (4) is provided at the top of one of the silicone face supports (2), and a lower portion of the bed board (1) is provided with a plurality of support rods (21) and ...) are slidably connected in the groove of the bottom plate (5). The surface is fixedly connected with a second shell (20), the interior of the second shell (20) is provided with a first rotating shaft (17), one end of the first rotating shaft (17) is fixedly connected with a second worm (25), the tooth end of the second worm (25) is meshingly connected with a second worm wheel (26), the middle part of the second worm wheel (26) is threadedly connected with a second screw (27), the top end of the second screw (27) passes through the bed board (1) and is fixedly connected to the bottom end of the bottom board (5), and the lower surface of the bed board (1) is fixedly connected with a driving device.
2. The device for assisting the prone position after retinal surgery according to claim 1, characterized in that: The driving device comprises a housing (14), a motor (22) is arranged inside the housing (14), a rotating shaft (17) is fixedly arranged at the output end of the motor (22), one end of the rotating shaft (17) is fixedly connected to a worm (23), the tooth end of the worm (23) is meshingly connected to a worm wheel (24), the middle part of the worm wheel (24) is threadedly connected to a screw (16), the top end of the screw (16) passes through the bed board (1) and is fixedly connected to a buffering and decompression pad (6), the outer wall of the rotating shaft (17) is rotatably connected to a bearing seat (18), the top end of the bearing seat (18) is fixedly connected to a fixing seat (19), and the top end of the fixing seat (19) is fixedly connected to the lower surface of the bed board (1).
3. The device for assisting the prone position after retinal surgery according to claim 2, characterized in that: The two side walls of the buffering and decompression pad (6) are provided with ventilation holes (15), the top of the buffering and decompression pad (6) is provided with an abdominal decompression hole (7), and the bottom of the buffering and decompression pad (6) is arranged on the upper surface of the bed board (1).
4. The prone position assisting device after retinal surgery according to claim 1, characterized in that: A plurality of longitudinal movement grooves (8) are arranged at one end of the middle portion of the upper surface of the bed board (1), a placement cavity (37) is arranged inside the bed board (1), and an adjustment mechanism is arranged inside the placement cavity (37) of the bed board (1).
5. The device for assisting the prone position after retinal surgery according to claim 4, characterized in that: The adjustment mechanism comprises a gear (33), the bottom end of the gear (33) is fixedly connected to a bevel gear 2 (35), the tooth end of the bevel gear 2 (35) is meshingly connected to a bevel gear 1 (34), one end of the bevel gear 1 (34) passes through the bed board (1) and is fixedly connected to a rotating shaft 2 (31), one end of the rotating shaft 2 (31) is fixedly connected to a hand wheel (11), and the top end of the hand wheel (11) is fixedly connected to a turning handle (12).
6. The device for assisting the prone position after retinal surgery according to claim 5, characterized in that: The tooth end of the gear (33) is meshingly connected to two racks (32), one end of the rack (32) is fixedly connected to a slide groove (30), the interior of the slide groove (30) is slidably connected to a slider 2 (36), the top end of the slider 2 (36) is fixedly connected to a knee support (9), the bottom end of the knee support (9) is arranged on the upper surface of the bed board (1), and the outer wall of the slider 2 (36) slides on the outside of the bed board (1).
7. The prone position assisting device after retinal surgery according to claim 6, characterized in that: The other end of the slide groove (30) is slidably connected to a slider (28), the top of the slider (28) is fixedly connected to a foot rest (10), the bottom end of the foot rest (10) is arranged on the upper surface of the bed board (1), and the outer wall of the slider (28) slides on the outside of the bed board (1).
8. A method for a prone position assist device after retinal surgery according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, starting the motor (22), driving the rotating shaft 1 (17), the worm 1 (23), the worm 2 (25), the worm wheel 1 (24), and the worm wheel 2 (26) to rotate, and the rotation of the worm wheel 1 (24) and the worm wheel 2 (26) drives the screw 1 (16) and the screw 2 (27) to rotate and rise; S2, rotating the hand wheel (11) to rotate the second rotating shaft (31) to drive the bevel gear (34), the second bevel gear (35) and the gear (33), and the gear (33) rotates to drive the rack (32) to move, and the knee support (9) and the foot support (10) can be adjusted during the rotation.