Adjustable lower limb lifting brace

Abstract

The invention relates to the technical field of medical instruments, and particularly discloses an adjustable lower limb lifting brace which comprises a fixed base, an opening is formed in the side surface of the fixed base, an adjusting screw rod is installed on the inner wall of the opening of the fixed base, and two supporting guide rails are fixedly connected to the bottom surface of a cavity of the fixed base. Two adjusting sliding blocks are installed on the outer surface of the adjusting screw rod, two limiting open grooves are formed in the lower surfaces of the adjusting sliding blocks, and lifting connecting rods are arranged at the upper ends of the adjusting sliding blocks. According to the adjustable lower limb lifting brace, the grooves of the first limiting frame and the second limiting frame adopt arc-shaped design, are different in depth and can fit the thickness change of legs, and local compression is reduced; the first attaching air bag and the second attaching air bag are circumferentially arranged, the attaching degree is further enhanced, pressure is dispersed, the leg posture change is adapted, the long-time use comfort of the patient is improved, the adjusting sliding block is slidably connected with the supporting guide rail through the limiting open groove, and it is guaranteed that the adjusting sliding block moves stably.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, in particular to an adjustable lower limb raising brace. Background Art

[0002] A lower limb lifting brace is a medical device used to assist in the treatment of lower limb diseases or injuries. It is usually made of materials with a certain degree of hardness and support, such as plastic, metal, etc. Through a specific design and structure, it can lift the lower limbs to a certain angle to promote blood return and reduce swelling and pain in the lower limbs. After trauma such as lower limb fractures and soft tissue injuries, the use of a lower limb lifting brace can elevate the affected limb, promote blood return, reduce swelling and pain, and facilitate wound healing and tissue repair. It is especially useful for patients who have been bedridden for a long time or have limited lower limb movement. For example, if a lower limb fracture requires long-term immobilization, or elderly patients need to be bedridden for a long time due to physical reasons, the use of a lower limb elevation brace can promote venous blood return in the lower limbs and reduce the risk of deep vein thrombosis. Diseases such as varicose veins and chronic venous insufficiency can cause lower limb edema. The lower limb elevation brace can promote venous return and reduce venous pressure by elevating the lower limbs, which helps relieve the symptoms of lower limb edema. Patients use the brace when resting or sleeping, which can fully elevate the lower limbs, relieve lower limb swelling caused by standing or sitting for a long time, and improve lower limb blood circulation.

[0003] According to the length, thickness and specific condition of the patient's lower limbs, choose a lower limb elevation brace with appropriate size, comfortable material and sufficient support. If the brace is too large or too small, it may affect the use effect and even cause local compression or discomfort. According to the instructions or the guidance of medical staff, wear the brace correctly. Generally speaking, make sure that the brace fits well with the lower limbs and is fixed in the correct position to avoid twisting or displacement of the brace;

[0004] When using existing lower limb lifting braces, the limbs placed on the support board are lifted by vertical lifting. Due to the different thicknesses of the human foot and calf, the flat support board will reduce the patient's comfort when supported for a long time, and it is easy to cause local compression and damage to the patient's legs. Summary of the Invention

[0005] The purpose of the present invention is to provide an adjustable lower limb lifting brace to solve the problem raised in the above background technology that due to the different thicknesses of the human foot and calf, the flat support plate will reduce the patient's comfort when supported for a long time, and it is easy to cause local compression and damage to the patient's legs.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an adjustable lower limb lifting brace, comprising a fixed base, a side surface of which is provided with an opening, and an inner wall of the fixed base opening is installed with an adjusting screw, the bottom surface of the fixed base cavity is fixedly connected with two supporting rails, the outer surface of the adjusting screw is installed with two adjusting sliders, the lower surface of the adjusting slider is provided with two limiting slots, the upper end of the adjusting slider is provided with a lifting link, the upper ends of the two lifting links are fixedly connected with a mounting base, the upper surface of the mounting base is fixedly connected with a first limiting frame and a second limiting frame, the surface of one end of the mounting base is provided with a foot support plate, the surface of the foot support plate is installed with a foot dorsum strap, the The surfaces of the first limit frame and the second limit frame are both provided with grooves, the inner wall of the groove of the first limit frame is fixedly connected to the first fitting airbag, and the inner wall of the groove of the second limit frame is fixedly connected to the second fitting airbag, and a linkage fitting mechanism is provided between the mounting base and the first limit frame and the second limit frame, which drives the telescopic screw and the air guide piston head to move in the air guide groove through two guide cylinders so that the first inflation groove and the second inflation groove inflate the first fitting airbag and the second fitting airbag, the rear surface of the foot support plate is fixedly connected to the auxiliary inflation port, the front surface of the foot support plate is fixedly connected to the support bracket, and the surface of the support bracket is provided with a heel airbag, and the cavity of the heel airbag is communicated with the auxiliary inflation port.

[0007] Preferably, the fixed base is rotationally connected to the adjusting screw, the threads on the outer surfaces at both ends of the adjusting screw are in opposite directions, and the adjusting screw is threadedly connected to the adjusting slider.

[0008] With the above technical solution, when the adjustment screw rotates, the two adjustment sliders will move toward or away from each other along the screw due to the opposite directions of the threads at both ends. This design makes the adjustment process more convenient and efficient, and can accurately adjust the height of the mounting base to meet the needs of different patients for the angle and height of lower limb elevation. For patients of different heights and body shapes, medical staff can quickly rotate the adjustment screw to change the position of the adjustment slider, thereby adjusting the overall height of the brace.

[0009] Preferably, the adjusting slider is slidably connected to the supporting guide rail through a limiting slot, the adjusting slider is rotatably connected to the lifting link, and the lifting link is rotatably connected to the mounting base, and the two lifting links are staggered.

[0010] By adopting the above technical solution, the sliding connection between the limit slot and the support guide rail ensures the stability of the adjustment slider during movement, prevents it from offsetting or shaking, and thus ensures that the installation base plate is smoothly lifted and lowered. The rotational connection between the adjustment slider and the lifting link, and the lifting link and the installation base plate, cooperate with the staggered lifting link, so that the installation base plate can remain horizontal during the lifting process, avoiding tilting and shaking of the patient's lower limbs during the lifting process, thereby improving the safety and comfort of use.

[0011] Preferably, the groove of the first limiting frame and the groove of the second limiting frame are both arc-shaped, and the depth of the groove of the first limiting frame is deeper than the depth of the groove of the second limiting frame, and the foot support plate is rotatably connected to the mounting base.

[0012] By adopting the above technical solution, the arc-shaped groove design can better fit the natural curve of the human leg, reduce local pressure, and improve the comfort of patients. The groove of the first limit frame is deeper, which can provide more stable support for the thicker part of the calf. The relatively shallow groove of the second limit frame is suitable for supporting the thinner part of the calf. The two work together to adapt to the changes in thickness of different parts of the legs. The foot support plate is rotatably connected to the mounting base, which makes it convenient for medical staff to adjust the placement angle of the foot according to the patient's leg condition to meet the personalized needs of different patients.

[0013] Preferably, the first fitting airbag and the second fitting airbag are respectively arranged about the circumference of the groove of the first limiting frame and the groove of the second limiting frame.

[0014] By adopting the above technical solution, the circumferentially arranged fitting airbags can wrap the legs in all directions, further enhancing the fit with the legs, effectively dispersing the pressure, and avoiding damage to the patient's legs caused by excessive local pressure. The elasticity of the airbags can adapt to the changes in the legs in different postures, improving the comfort of patients when using the brace for a long time.

[0015] Preferably, the linkage fitting mechanism includes an air guide groove, which is provided on the side surface of the mounting base plate, a guide cylinder is installed on the inner wall of one end of the air guide groove, a telescopic screw is installed through one end of the guide cylinder, and an air guide piston head is fixedly connected to one end of the telescopic screw, a first air filling groove is provided on the lower surface of the first limit frame, and a second air filling groove is provided on the lower surface of the second limit frame.

[0016] Using the above technical solution, the design of this linkage fitting mechanism drives the air guide piston head to move in the air guide groove by rotating the telescopic screw, thereby realizing the inflation of the first fitting airbag and the second fitting airbag. It has a compact structure and is easy to operate. Medical staff do not need additional inflation equipment and can flexibly adjust the inflation volume of the airbag according to the patient's leg condition to achieve the best fitting effect.

[0017] Preferably, the second limiting frame is rotatably connected to the guide cylinder, the guide cylinder is threadedly connected to the telescopic screw, and the gas guide piston head is slidably connected to the gas guide slot.

[0018] By adopting the above technical solution, the second limit frame is rotatably connected to the guide cylinder, which can ensure the stability of the structure during the adjustment process. The threaded connection between the guide cylinder and the telescopic screw makes it possible to accurately control the movement of the gas piston head when rotating the telescopic screw, thereby accurately controlling the inflation amount of the airbag. The sliding connection between the gas piston head and the gas groove ensures the sealing of the gas during the transportation process, improves the inflation efficiency, and ensures that the airbag can be inflated quickly and stably.

[0019] Preferably, the first air-filling groove and the second air-filling groove are respectively arranged corresponding to the two air-guiding grooves, and the first air-filling groove and the second air-filling groove are respectively communicated with the first fitting airbag and the second fitting airbag.

[0020] By adopting the above technical solution, the correspondingly arranged inflation grooves and gas guide grooves, as well as their connection with the fitted airbag, ensure that gas can be accurately and quickly delivered to the airbag, avoiding the problem of gas leakage or poor delivery, so that the airbag can be inflated in a timely and effective manner, thereby improving the performance of the brace.

[0021] Preferably, a locking groove is provided on the outer surface of one end of the mounting base, a groove is provided on the rotating shaft surface of the foot support plate, and a transmission cylinder is installed in the groove on the rotating shaft surface of the foot support plate, and a locking block is fixedly connected to the outer surface of the transmission cylinder.

[0022] By adopting the above technical solution, this structural design can realize the locking of the foot support plate at different angles. After the medical staff adjusts the angle of the foot support plate according to the patient's needs, the locking block cooperates with the locking groove to fix the position of the foot support plate, preventing it from rotating at will during use, and ensuring the stability and safety of the patient's foot placement.

[0023] Preferably, the groove on the surface of the foot support plate shaft forms a sliding connection with the transmission cylinder, a spring is connected between the foot support plate and the transmission cylinder, the inner wall of the locking groove is provided with a circumferential array of slots, and the outer surface of the locking block is provided with a circumferential array of blocks.

[0024] By adopting the above technical solution, the sliding connection and the spring setting enable the locking block to flexibly cooperate with the slot in the locking groove. When adjusting the angle of the foot support plate, the block can easily slide out of the slot. After adjusting into place, it can be quickly inserted into the corresponding slot under the action of the spring, achieving fast and accurate locking. The circular array of slots and blocks provides multiple adjustable angles, increases the flexibility of adjustment, and meets the personalized needs of different patients.

[0025] Compared with the prior art, the present invention has the following beneficial effects: the adjustable lower limb raising brace:

[0026] 1. The grooves of the first and second limit frames are designed with an arc shape and different depths, which can fit the changes in leg thickness and reduce local pressure. The first and second fitting airbags are arranged circumferentially to further enhance the fit, disperse pressure, adapt to changes in leg posture, and improve the patient's comfort during long-term use. The adjustment slider is slidably connected to the support rail through the limit slot to ensure the stability of the adjustment slider. The adjustment slider is rotatably connected to the lifting link, and the lifting link is rotatably connected to the mounting base. The two lifting links are staggered to keep the mounting base level during lifting, preventing the patient's lower limbs from tilting or shaking, ensuring safe use.

[0027] 2. The fixed base is rotatably connected to the adjustment screw. The threads at both ends of the adjustment screw are in opposite directions and are threadedly connected to the adjustment slider. The height of the installation base can be easily adjusted to meet the needs of different patients for lower limb elevation angle and height. The foot support plate is rotatably connected to the installation base and can be locked at multiple angles through the locking groove, transmission cylinder and locking block, making it convenient to adjust the foot placement angle according to the patient's leg condition.

[0028] 3. The linkage fitting mechanism drives the air guide piston head to move in the air guide groove by rotating the telescopic screw, thereby realizing the inflation of the first fitting airbag and the second fitting airbag. No additional inflation equipment is required, and the operation is simple. The inflation groove is corresponding to the air guide groove and is connected with the airbag, ensuring accurate and rapid gas delivery, improving the performance of the brace, and providing auxiliary support for the patient's heel through the support frame, which increases the wearing comfort. Subsequently, the inflation and deflation of the heel airbag are independently controlled through the auxiliary inflation port, further increasing the support for the patient's heel and reducing the pressure on the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the three-dimensional structure of the guide cylinder and the telescopic screw rod connected to the present invention;

[0030] Figure 2 This is a schematic diagram of the three-dimensional structure of the connection between the fixed base and the adjusting screw of the present invention;

[0031] Figure 3 This is a schematic diagram of the three-dimensional structure of the connection between the first limiting frame and the first fitting airbag of the present invention;

[0032] Figure 4 This is a schematic diagram of the three-dimensional structure of the connection between the fixed base and the support rail of the present invention;

[0033] Figure 5 This is a schematic diagram of the three-dimensional structure of the connection between the adjusting slider and the limiting slot of the present invention;

[0034] Figure 6This is a schematic diagram of the three-dimensional structure of the connection between the mounting base plate and the first limiting frame of the present invention;

[0035] Figure 7 This is a schematic diagram of the three-dimensional structure of the connection between the first limiting frame and the first inflation groove of the present invention;

[0036] Figure 8 This is a schematic diagram of the three-dimensional structure of the connection between the second limiting frame and the second inflation groove of the present invention;

[0037] Figure 9 This is a schematic diagram of the three-dimensional structure of the connection between the foot support plate and the instep strap of the present invention;

[0038] Figure 10 It is a schematic diagram of the three-dimensional structure of the connection between the transmission cylinder and the locking block of the present invention.

[0039] In the figure: 1. Fixed base; 2. Adjusting screw; 3. Support rail; 4. Adjusting slider; 5. Limiting slot; 6. Lifting link; 7. Mounting base; 8. First limiting frame; 9. Second limiting frame; 10. Foot support plate; 11. Instep strap; 12. First fitting airbag; 13. Second fitting airbag; 14. Air guide slot; 15. Guide cylinder; 16. Telescopic screw; 17. Air guide piston head; 18. First inflation groove; 19. Second inflation groove; 20. Locking groove; 21. Transmission cylinder; 22. Locking block; 23. Auxiliary inflation port; 24. Support frame; 25. Heel airbag. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0041] See also Figure 1-10The present invention provides a technical solution: an adjustable lower limb lifting brace, comprising a fixed base 1, an adjusting screw 2, a supporting guide rail 3, an adjusting slider 4, a limiting slot 5, a lifting connecting rod 6, a mounting base 7, a first limiting frame 8, a second limiting frame 9, a foot support plate 10, a dorsal foot strap 11, a first fitting air bag 12, a second fitting air bag 13, an air guide slot 14, a guide cylinder 15, a telescopic screw 16, an air guide piston head 17, a first inflation groove 18, a second inflation groove 19, a locking groove 20, and a transmission cylinder 21. , locking block 22, auxiliary inflation port 23, support bracket 24 and heel airbag 25, fixed base 1, its side surface is provided with an opening, and the inner wall of the fixed base 1 opening is installed with an adjusting screw 2, the bottom surface of the fixed base 1 cavity is fixedly connected with two supporting guide rails 3, the outer surface of the adjusting screw 2 is installed with two adjusting sliders 4, the lower surface of the adjusting slider 4 is provided with two limiting slots 5, the upper end of the adjusting slider 4 is provided with a lifting link 6, the fixed base 1 and the adjusting screw 2 are rotatably connected, and the outer surfaces of the two ends of the adjusting screw 2 are fixedly connected. The thread direction is opposite, the adjusting screw 2 is threadedly connected to the adjusting slider 4, the adjusting slider 4 is slidingly connected to the support guide rail 3 through the limit slot 5, the adjusting slider 4 is rotatably connected to the lifting link 6, and the lifting link 6 is rotatably connected to the mounting base 7. The two lifting links 6 are staggered. First, place the patient's lower limbs on the brace, place the foot on the foot support plate 10, and fix it with the instep strap 11. Rotate the adjusting screw 2. Since the fixed base 1 is rotatably connected to the adjusting screw 2, and the appearance of the adjusting screw 2 at both ends is The thread directions of the two surfaces are opposite, forming a threaded connection with the adjusting slider 4, so when the adjusting screw 2 rotates, the two adjusting sliders 4 will move toward or away from each other along the screw, and the adjusting slider 4 forms a sliding connection with the supporting guide rail 3 through the limiting slot 5 to ensure the stability of movement. The adjusting slider 4 forms a rotational connection with the lifting link 6, and the lifting link 6 and the mounting base 7 also form a rotational connection, and the two lifting links 6 are staggered, so that the horizontal movement of the adjusting slider 4 is converted into a smooth lifting and lowering of the mounting base 7, thereby adjusting the height of the lower limb lifting.

[0042] The upper ends of the two lifting links 6 are fixedly connected to the mounting base 7, and the upper surface of the mounting base 7 is fixedly connected to the first limiting frame 8 and the second limiting frame 9. The groove of the first limiting frame 8 and the groove of the second limiting frame 9 are both arc-shaped, and the depth of the groove of the first limiting frame 8 is deeper than the depth of the groove of the second limiting frame 9. The foot support plate 10 is rotatably connected to the mounting base 7. The first fitting airbag 12 and the second fitting airbag 13 are respectively arranged about the circumference of the groove of the first limiting frame 8 and the groove of the second limiting frame 9. The foot support plate 10 is rotatably connected to the mounting base 7. When the angle of the foot support plate 10 needs to be adjusted, the transmission cylinder 21 is pulled to slide in the groove on the surface of the rotating shaft of the foot support plate 10, driving the locking block 22 to disengage from the groove on the inner wall of the locking groove 20 on the outer surface of one end of the mounting base 7. At this time, the foot support plate 10 can be rotated to a suitable angle, and the transmission cylinder 21 is released. Under the action of the spring, the locking block 22 is re-engaged in the corresponding groove of the locking groove 20 to fix the angle of the foot support plate 10.

[0043] The surface of one end of the mounting base 7 is provided with a foot support plate 10, and the surface of the foot support plate 10 is provided with a dorsal strap 11. The surfaces of the first limiting frame 8 and the second limiting frame 9 are both provided with grooves, and the inner wall of the groove of the first limiting frame 8 is fixedly connected with a first fitting air bag 12, and the inner wall of the groove of the second limiting frame 9 is fixedly connected with a second fitting air bag 13. The linkage fitting mechanism includes an air guide groove 14, and the air guide groove 14 is provided on the side surface of the mounting base 7. A guide cylinder 15 is installed on the inner wall of one end of the air guide groove 14, and a telescopic screw 16 is installed through one end of the guide cylinder 15, and an air guide piston head 17 is fixedly connected to one end of the telescopic screw 16. A first inflation groove 18 is provided on the lower surface of the first limiting frame 8, and a second inflation groove 19 is provided on the lower surface of the second limiting frame 9. The second limiting frame 9 is rotatably connected to the guide cylinder 15, and the guide cylinder 15 and the telescopic screw 16 forms a threaded connection, the air-guiding piston head 17 forms a sliding connection with the air-guiding groove 14, the first air-charging groove 18 and the second air-charging groove 19 are respectively arranged corresponding to the two air-guiding grooves 14, the first air-charging groove 18 and the second air-charging groove 19 are respectively connected with the first fitting airbag 12 and the second fitting airbag 13, and the telescopic screw 16 is rotated. Because the guide cylinder 15 and the telescopic screw 16 are threadedly connected, the guide cylinder 15 is installed on the inner wall of one end of the air-guiding groove 14, and the second limiting frame 9 is rotatably connected with the guide cylinder 15, when the telescopic screw 16 is rotated, the air-guiding piston head 17 slides in the air-guiding groove 14, and the first air-charging groove 18 on the lower surface of the first limiting frame 8 and the second air-charging groove 19 on the lower surface of the second limiting frame 9 are respectively arranged corresponding to the two air-guiding grooves 14, and are respectively connected with the first fitting airbag 12 and the second fitting airbag 13 to facilitate the flow of gas.

[0044] A linkage fitting mechanism is provided between the mounting base 7 and the first limiting frame 8 and the second limiting frame 9, which drives the telescopic screw 16 and the air guide piston head 17 to move in the air guide groove 14 through two guide cylinders 15, so that the first inflation groove 18 and the second inflation groove 19 inflate the first fitting airbag 12 and the second fitting airbag 13. The rear surface of the foot support plate 10 is fixedly connected with an auxiliary inflation port 23, and the front surface of the foot support plate 10 is fixedly connected with a supporting bracket 24, and the surface of the supporting bracket 24 is provided with a heel airbag 25, and the cavity of the heel airbag 25 is communicated with the auxiliary inflation port 23. A locking groove 20 is provided on the outer surface of one end of the mounting base 7, and a groove is provided on the rotating shaft surface of the foot support plate 10, and a transmission cylinder 21 is installed in the groove on the rotating shaft surface of the foot support plate 10. The outer surface of the moving cylinder 21 is fixedly connected with a locking block 22, and the groove on the surface of the rotating shaft of the foot support plate 10 forms a sliding connection with the transmission cylinder 21. A spring is connected between the foot support plate 10 and the transmission cylinder 21. The inner wall of the locking groove 20 is provided with a circumferential array of grooves, and the outer surface of the locking block 22 is provided with a circumferential array of blocks. The sliding of the air-guide piston head 17 allows the gas to pass through the air-guide groove 14 and the inflation groove into the first fitting airbag 12 and the second fitting airbag 13, so that it is inflated to better fit the patient's leg and disperse the pressure. The patient places the heel on the surface of the support frame 24 and the heel airbag 25, which is convenient for limiting the heel, and the deformation of the heel airbag 25 is controlled by the auxiliary inflation port 23, which is conducive to fitting the heel for decompression, thereby further improving the patient's comfort.

[0045] Working principle: When using the adjustable lower limb lifting brace, rotate the adjusting screw 2. When the adjusting screw 2 rotates, it drives the adjusting slider 4 to move along the screw. The adjusting slider 4 drives the mounting base 7 to move up and down through two lifting links 6. When adjusting the angle, pull the transmission cylinder 21 to drive the locking block 22 to disengage from the locking groove 20. After rotating the foot support plate 10, release the transmission cylinder 21, and the locking block 22 is re-engaged in the locking groove 20 for fixation. Rotate the telescopic screw 16 to drive the gas guide piston head 17 to slide in the gas guide groove 14, so that the gas guide piston head 17 slides and pushes the gas through the gas guide groove 14 and the inflation groove into the first fitting air bag 12 and the second fitting air bag 13, thereby increasing the overall practicality.

[0046] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable lower limb raising brace, comprising a fixed base (1), a side surface of which is provided with an opening, and an adjusting screw (2) is installed on the inner wall of the opening of the fixed base (1), characterized in that: The bottom surface of the cavity of the fixed base (1) is fixedly connected with two supporting guide rails (3), the outer surface of the adjusting screw (2) is installed with two adjusting sliders (4), the lower surface of the adjusting slider (4) is provided with two limiting slots (5), the upper end of the adjusting slider (4) is provided with a lifting link (6), the upper ends of the two lifting links (6) are fixedly connected with a mounting base (7), the upper surface of the mounting base (7) is fixedly connected with a first limiting frame (8) and a second limiting frame (9), the surface of one end of the mounting base (7) is provided with a foot support plate (10), the surface of the foot support plate (10) is installed with a dorsal strap (11), the surfaces of the first limiting frame (8) and the second limiting frame (9) are both provided with grooves, and the inner wall of the groove of the first limiting frame (8) is fixedly connected with a first fitting airbag (12), the inner wall of the groove of the second limiting frame (9) is fixedly connected with a second fitting airbag (13), and a linkage fitting mechanism is provided between the mounting base (7) and the first limiting frame (8) and the second limiting frame (9), which drives the telescopic screw (16) and the air guide piston head (17) to move in the air guide groove (14) through two guide cylinders (15), so that the first inflation groove (18) and the second inflation groove (19) inflate the first fitting airbag (12) and the second fitting airbag (13), the rear surface of the foot support plate (10) is fixedly connected with an auxiliary inflation port (23), the front surface of the foot support plate (10) is fixedly connected with a support frame (24), and a heel airbag (25) is provided on the surface of the support frame (24), and the cavity of the heel airbag (25) is connected to the auxiliary inflation port (23).

2. The adjustable lower limb elevation brace according to claim 1, characterized in that: The fixed base (1) and the adjusting screw (2) are in rotational connection, the threads on the outer surfaces at both ends of the adjusting screw (2) are in opposite directions, and the adjusting screw (2) and the adjusting slider (4) are in threaded connection.

3. The adjustable lower limb elevation brace according to claim 1, characterized in that: The adjusting slider (4) is slidably connected to the supporting guide rail (3) via a limiting slot (5), the adjusting slider (4) is rotatably connected to the lifting link (6), and the lifting link (6) is rotatably connected to the mounting base plate (7), and the two lifting links (6) are staggered.

4. The adjustable lower limb elevation brace according to claim 1, characterized in that: The groove of the first limiting frame (8) and the groove of the second limiting frame (9) are both arc-shaped, and the depth of the groove of the first limiting frame (8) is deeper than the depth of the groove of the second limiting frame (9). The foot support plate (10) is rotatably connected to the mounting base plate (7).

5. The adjustable lower limb elevation brace according to claim 1, characterized in that: The first fitting airbag (12) and the second fitting airbag (13) are respectively arranged about the circumference of the groove of the first limiting frame (8) and the groove of the second limiting frame (9).

6. The adjustable lower limb elevation brace according to claim 1, characterized in that: The linkage fitting mechanism includes an air guide groove (14), the air guide groove (14) is provided on the side surface of the mounting base plate (7), a guide cylinder (15) is installed on the inner wall of one end of the air guide groove (14), a telescopic screw (16) is installed through one end of the guide cylinder (15), and one end of the telescopic screw (16) is fixedly connected to an air guide piston head (17), a first air charging groove (18) is provided on the lower surface of the first limiting frame (8), and a second air charging groove (19) is provided on the lower surface of the second limiting frame (9).

7. The adjustable lower limb elevation brace according to claim 6, characterized in that: The second limiting frame (9) is connected to the guide cylinder (15) in a rotational manner, the guide cylinder (15) is connected to the telescopic screw (16) in a threaded manner, and the air guide piston head (17) is connected to the air guide slot (14) in a sliding manner.

8. The adjustable lower limb elevation brace according to claim 6, characterized in that: The first inflation groove (18) and the second inflation groove (19) are respectively arranged corresponding to the two air guide grooves (14), and the first inflation groove (18) and the second inflation groove (19) are respectively connected to the first fitting air bag (12) and the second fitting air bag (13).

9. The adjustable lower limb elevation brace according to claim 1, characterized in that: A locking groove (20) is provided on the outer surface of one end of the mounting base plate (7), a groove is provided on the rotating shaft surface of the foot support plate (10), and a transmission cylinder (21) is installed in the groove on the rotating shaft surface of the foot support plate (10), and a locking block (22) is fixedly connected to the outer surface of the transmission cylinder (21).

10. The adjustable lower limb elevation brace according to claim 9, characterized in that: The groove on the surface of the rotation shaft of the foot support plate (10) is in sliding connection with the transmission cylinder (21); a spring is connected between the foot support plate (10) and the transmission cylinder (21); the inner wall of the locking groove (20) is provided with a circumferential array of card slots; the outer surface of the locking card block (22) is provided with a circumferential array of card blocks.

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