Adjustable 3D printing ankle foot orthosis

Abstract

The adjustable 3D printing ankle-foot orthosis comprises a foot limiting plate, the rear side of the upper end of the foot limiting plate is rotationally connected with two position adjusting connecting rods through rotating seats, and the two position adjusting connecting rods are located on the left side and the right side of the upper end of the foot limiting plate correspondingly; leg rear fixing sleeves with forward openings are fixedly connected to the upper ends of the two position adjusting connecting rods, leg front fixing sleeves are connected to the left sides of the openings of the leg rear fixing sleeves through flexible connecting belts, and 3D printing customization can be conducted on the foot limiting plates, the position adjusting connecting rods and the leg rear fixing sleeves according to the characteristics of the feet, the legs and the naked parts of the patient; according to the barefoot orthosis, the multiple force adjusting elastic pieces are arranged in the upper end of the supporting elastic piece, and the number of the force adjusting elastic pieces can be increased or decreased according to different treatment stages and rehabilitation stages so that the barefoot orthosis can adapt to and provide foot supports with different strengths, and the treatment and rehabilitation effects can be enhanced.

Description

Technical Field

[0001] The present invention belongs to the technical field related to medical rehabilitation, and in particular relates to an adjustable 3D printed ankle-foot orthosis. Background Art

[0002] In the field of medical rehabilitation, ankle-foot orthoses play a vital role in the correction and support of patients' ankle joints and feet. Traditional ankle-foot orthoses usually have many problems. On the one hand, it is difficult for traditional orthoses to fully fit the characteristics of patients' feet, legs and ankles, resulting in poor correction and support effects. On the other hand, the support strength of traditional orthoses is often fixed and cannot be adjusted according to the different treatment and rehabilitation stages of patients, and cannot meet the dynamic needs of patients during the rehabilitation process.

[0003] In addition, when traditional orthotics are used to fix the patient's legs, it is difficult to achieve both firmness and comfort. The fixation method is either not firm enough, which easily causes positional movement and affects the correction effect; or it is firm but less comfortable, causing discomfort to the patient and reducing the patient's compliance.

[0004] Moreover, traditional orthotics lack effective massage and stimulation functions, cannot provide targeted rehabilitation assistance for the acupuncture points on the soles of patients' feet, and are difficult to provide good solutions for anti-slip. In terms of the convenience of wearing and removing, traditional orthotics also have shortcomings, and the operation is cumbersome, which affects the efficiency of use. In summary, a new type of adjustable 3D printed ankle-foot orthosis is needed to solve these problems in the existing technology. Summary of the invention

[0005] The purpose of the present invention is to provide an adjustable 3D printed ankle-foot orthosis to solve the problem that the traditional ankle-foot orthosis proposed in the above background technology is difficult to fully fit the patient's foot, leg and ankle characteristics, and the support strength is fixed and cannot be adjusted according to the patient's different treatment stages and rehabilitation stages.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an adjustable 3D printed ankle-foot orthosis, comprising a foot limit plate, wherein the rear side of the upper end of the foot limit plate is rotatably connected to two adjustment connecting rods through a swivel seat, and the two adjustment connecting rods are respectively located on the left and right sides of the upper end of the foot limit plate, and the upper ends of the two adjustment connecting rods are fixedly connected with a leg rear fixing sleeve opening forward, the left side of the opening of the leg rear fixing sleeve is connected with the leg front fixing sleeve through a flexible connecting belt, and the right end of the leg front fixing sleeve is connected to the right side of the opening of the leg rear fixing sleeve through magic adhesive, and the front left and right sides between the foot limit plate and the leg rear fixing sleeve are connected with supporting springs through two supporting swivel seats, and the four supporting swivel seats are respectively rotatably connected to the front and rear ends of the two supporting springs, and are respectively fixedly connected to the front side of the upper end of the foot limit plate and the left and right sides of the opening of the leg rear fixing sleeve, and a plurality of force adjusting springs are arranged inside the upper ends of the two supporting springs, and the supporting springs and the force adjusting springs are both arranged in an arc shape convex to the front side, and are both elastic.

[0007] Preferably, the force adjusting spring piece is fixedly connected to the interior of the upper end of the supporting spring piece through two limit slots and two limit clamps, the two limit slots are opened inside the front and rear sides of the upper end of the supporting spring piece, the two limit clamps are respectively clamped in the two limit slots and fixedly connected to the front and rear ends of the force adjusting spring piece.

[0008] Preferably, a fixing stud is fixedly connected at the center of the inner wall at the lower end of the limiting slot, and the fixing stud passes through the inside of the limiting clamp, a fixing nut is provided at the upper end of the uppermost limiting clamp, and the fixing nut is threadedly connected to the outside of the upper end of the fixing stud, and a sleeve-type wrench is fixedly connected to the outer side of the upper end of the fixing nut.

[0009] Preferably, a locking nut is provided at the upper end of the fixing nut, and the locking nut is threadedly connected to the outside of the upper end of the fixing stud and is located inside the lower end of the outer sleeve wrench. An inner sleeve wrench is fixedly connected to the outer side of the upper end of the locking nut, and the inner sleeve wrench penetrates upward into the upper end of the outer sleeve wrench.

[0010] Preferably, a rear airbag opening toward the front is fixedly connected inside the rear leg fixing sleeve, the front end of the rear airbag is connected to the front airbag via a connecting tube, and the connecting tube is connected at the middle of the left side between the rear airbag and the front airbag, and the front airbag is fixedly connected inside the front leg fixing sleeve.

[0011] Preferably, an upper inflation and deflation head is connected to the upper side of the rear end of the rear airbag, and the upper inflation and deflation head extends backward through the interior of the upper side of the rear end of the leg rear fixing sleeve, an upper sealing ring is fixedly connected to the interior of the rear end of the upper inflation and deflation head, an upper sealing head is provided at the front end of the upper sealing ring, and an upper deflation push rod is fixedly connected at the center of the rear end of the upper sealing head.

[0012] Preferably, the upper deflation push rod passes through the interior of the upper sealing ring backwards, and a gap is provided between the upper sealing ring, and extends backwards to the outside of the rear end of the upper inflation and deflation head. An upper sealing spring is provided at the rear end of the upper sealing head, and an upper limit ring is provided at the rear end of the upper sealing spring.

[0013] Preferably, the upper limit ring is fixedly connected to the rear end of the upper inflation and deflation head, a plurality of vent holes are provided inside the upper sealing head and the outer side of the upper limit ring, and the upper inflation and deflation head and the upper sealing head are elastically connected to the interior of the upper inflation and deflation head through an upper sealing spring and the upper limit ring.

[0014] Preferably, an inner airbag is provided inside the foot limit plate, a plurality of airbag columns are provided on the upper end of the inner airbag, and the upper ends of the plurality of airbag columns all penetrate upwardly through the upper end of the foot limit plate and protrude outside the upper end of the foot limit plate, the rear end of the inner airbag is connected to a lower inflation and deflation head through a connecting tube, a lower sealing ring is fixedly connected to the rear end of the lower inflation and deflation head, and a lower sealing head is clamped inside the rear end of the lower sealing ring.

[0015] Preferably, a plurality of ventilation grooves are provided inside the outer side of the lower sealing head, a lower deflation push rod is fixedly connected to the center of the front end of the lower sealing head, the lower deflation push rod passes through the interior of the lower sealing ring, and a gap is provided between the lower deflation push rod and the lower sealing ring, and extends backward to the outside of the rear end of the lower inflation and deflation head, a lower sealing spring is provided inside the rear end of the lower sealing head, and is elastically connected to the interior of the lower inflation and deflation head through the lower sealing spring.

[0016] Compared with the prior art, the present invention provides an adjustable 3D printed ankle-foot orthosis, which has the following beneficial effects:

[0017] 1. Personalized customization: The foot limit plate, adjustment rod and leg rear fixation sleeve can be customized by 3D printing according to the characteristics of the patient's feet, legs and bare parts, so that the barefoot orthosis can better fit the patient's feet, legs and bare parts, improving the treatment and rehabilitation effects.

[0018] 2. Adjustable support strength: Multiple force-adjusting springs are arranged inside the upper end of the support spring. The number of force-adjusting springs can be increased or decreased according to different treatment stages and rehabilitation stages to provide foot support of different strengths and enhance the treatment and rehabilitation effects.

[0019] 3. Convenient adjustment: The force-adjusting spring pieces are fixed and adjusted through limit slots, limit clamps, fixed studs, fixed nuts, locking nuts and other structures. It is easy to operate and can be quickly fixed and locked, which improves the efficiency of adjusting the number of force-adjusting spring pieces and the connection stability.

[0020] 4. Enhance the firmness and comfort of fixation: The rear airbag inside the rear leg fixation sleeve and the front airbag inside the front leg fixation sleeve are connected by a connecting tube. After inflation, they can reinforce the leg fixation sleeve and the patient's calf to prevent position movement and improve the firmness of fixation, and can also increase the fitting area and realize elastic connection, making it more comfortable for patients to wear.

[0021] 5. Easy to wear and remove: The upper inflation and deflation heads of the rear airbag and the front airbag are convenient for inflation and deflation through the upper sealing head, upper sealing spring and other structures, making the barefoot orthosis easier to wear and remove, improving the convenience and efficiency of wearing and removing.

[0022] 6. Massage and anti-slip function: The inner airbag inside the foot limit plate and the multiple airbag columns on the upper end can massage and stimulate the acupuncture points on the soles of the feet when the patient walks, improving the treatment and rehabilitation effects. At the same time, it can prevent the slippage between the soles of the feet and the foot limit plate, thereby improving the anti-slip effect.

[0023] 7. Adjustable massage intensity: The airbag column can adjust the softness and hardness through the lower inflation and deflation head, and then adjust the massage and stimulation intensity of the patient's soles to ensure reasonable massage and stimulation, and avoid excessive or insufficient intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the ankle-foot orthosis of the present invention.

[0025] Figure 2 It is a schematic diagram of the connection structure of the foot limiting plate of the present invention.

[0026] Figure 3 It is a schematic diagram of the connection structure of the force regulating spring piece of the present invention.

[0027] Figure 4 For the present invention Figure 3 Enlarged schematic diagram at point A in the middle.

[0028] Figure 5 It is a schematic diagram of the rear airbag connection structure of the present invention.

[0029] Figure 6 For the present invention Figure 5 Enlarged schematic diagram of point B in the middle.

[0030] Figure 7 It is a schematic diagram of the inner airbag connection structure of the present invention.

[0031] Figure 8 For the present invention Figure 7 Enlarged schematic diagram at point C in the middle.

[0032] In the figure: 1. foot limit plate; 2. adjustment connecting rod; 3. leg rear fixing sleeve; 4. leg front fixing sleeve; 5. magic stick; 6. support swivel; 7. support spring; 8. force adjustment spring; 9. limit slot; 10. limit clamp; 11. fixing stud; 12. fixing nut; 13. outer sleeve type spanner; 14. locking nut; 15. inner sleeve type spanner; 16. rear airbag; 17. front airbag; 18. upper inflation and deflation head; 19. upper sealing ring; 20. upper sealing head; 21. upper deflation push rod; 22. upper sealing spring; 23. upper limit ring; 24. inner airbag; 25. airbag column; 26. lower inflation and deflation head; 27. lower sealing ring; 28. lower sealing head; 29. ​​lower deflation push rod; 30. lower sealing spring. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments 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.

[0034] The present invention provides Figure 1-Figure 8The adjustable 3D printed ankle-foot orthosis shown in the figure comprises a foot limiting plate 1, the rear side of the upper end of the foot limiting plate 1 is rotatably connected to two adjusting connecting rods 2 through a swivel seat, and the two adjusting connecting rods 2 are respectively located on the left and right sides of the upper end of the foot limiting plate 1, the upper ends of the two adjusting connecting rods 2 are fixedly connected to a leg rear fixing sleeve 3 opening forward, the left side of the opening of the leg rear fixing sleeve 3 is connected to the leg front fixing sleeve 4 through a flexible connecting belt, the right end of the leg front fixing sleeve 4 is connected to the right side of the opening of the leg rear fixing sleeve 3 through a magic adhesive 5, the left and right sides of the front end between the foot limiting plate 1 and the leg rear fixing sleeve 3 are connected to support spring pieces 7 through two supporting swivel seats 6, and the four supporting swivel seats 6 are respectively rotatable. The foot limit plate 1, the adjusting connecting rod 2 and the leg rear fixing sleeve 3 of the barefoot orthosis can be 3D printed and customized according to the characteristics of the patient's foot, leg and bare body, so that the barefoot orthosis can better fit the patient's foot and leg. and bare feet, improve the treatment and rehabilitation effect, during use, the patient's foot is placed on the upper end of the foot limiting plate 1, and the foot position is limited by the limiting edge on the outer side of the upper end, and then the bare feet is placed between the two adjusting connecting rods 2, and the calf is clamped into the inside of the leg rear fixing sleeve 3 through the opening at the front end of the leg rear fixing sleeve 3, and finally the leg front fixing sleeve 4 is fixed to the front end of the calf through the flexible connecting belt and Velcro 5, so that the barefoot corrector is fixed on the patient's calf, and the position between the foot limiting plate 1 and the patient's foot and the two adjusting connecting rods 2 and the bare feet is limited. When the patient walks through the barefoot corrector, the angle between the patient's calf and foot changes. At this time, the foot The upper limit plate 1 can adjust the position between the patient's calf and foot by rotating between the adjustment link 2 and the foot limit plate 1, and limit the position between the foot and the bare leg and calf, ensuring that the patient can walk forward with a correct posture. At the same time, the patient can use the two supporting spring plates 7 and multiple force adjusting spring plates 8 on both sides between the foot limit plate 1 and the leg rear fixing sleeve 3 to assist the foot in supporting the body, and the rebound force of the supporting spring plates 7 and the force adjusting spring plates 8 can assist the patient in retracting the foot and moving forward, and the number of force adjusting spring plates 8 can be increased or decreased according to different treatment stages and rehabilitation stages to adapt to providing different intensities of foot support and enhance the treatment and rehabilitation effects.

[0035] Preferably, the force adjusting spring piece 8 is fixedly connected to the inside of the upper end of the supporting spring piece 7 through two limiting slots 9 and two limiting clamps 10. The two limiting slots 9 are arranged inside the front and rear sides of the upper end of the supporting spring piece 7. The two limiting clamps 10 are respectively clamped inside the two limiting slots 9 and fixedly connected to the front and rear ends of the force adjusting spring piece 8. A fixing stud 11 is fixedly connected to the center of the inner wall of the lower end of the limiting slot 9, and the fixing stud 11 runs through the limiting clamp 10. A fixing nut 12 is provided at the upper end of the uppermost limiting clamp 10, and the fixing nut 12 is threadedly connected to the outside of the upper end of the fixing stud 11. A sleeve-type wrench 13 is fixedly connected to the outer side of the upper end of the fixing nut 12. A locking nut 14 is provided at the upper end of the fixing nut 12, and the locking nut 14 is threadedly connected to the fixing stud 11 is located outside the upper end and inside the lower end of the outer sleeve wrench 13. The outer side of the upper end of the locking nut 14 is fixedly connected to the inner sleeve wrench 15, and the inner sleeve wrench 15 penetrates upwardly into the upper end of the outer sleeve wrench 13. In the process of increasing or decreasing the force adjusting spring piece 8, the force adjusting spring piece 8 can be clamped in the limiting card slot 9 at both ends of the upper end of the supporting spring piece 7 through the limiting card head 10 and the fixing stud 11, or taken out from the limiting card slot 9 at both ends of the upper end of the supporting spring piece 7, and then the added force adjusting spring piece 8 or the remaining force adjusting spring piece 8 is fixed in the limiting card slot 9 through the threaded connection between the fixing stud 11 and the fixing nut 12, thereby increasing and reducing the overall elastic force formed by the supporting spring piece 7 and multiple force adjusting spring pieces 8, so as to adapt to the use in different treatment stages and rehabilitation stages.

[0036] Preferably, the fixing nut 12 can be rotated and pressed against the upper end of the uppermost force adjusting spring piece 8 by means of an outer sleeve wrench 13, and can be locked in position by means of a threaded connection between the fixing stud 11 and the locking nut 14, and the locking nut 14 can be rotated and pressed against the upper end of the fixing nut 12 by means of an inner sleeve wrench 15, which can both quickly fix the force adjusting spring piece 8 and quickly lock the fixing nut 12, thereby improving the efficiency of adjusting the number of force adjusting spring pieces 8 and improving the connection stability of the force adjusting spring pieces 8.

[0037] Preferably, a rear airbag 16 opening toward the front side is fixedly connected inside the rear leg fixing sleeve 3, and a front airbag 17 is connected to the front end of the rear airbag 16 through a connecting tube, and the connecting tube is connected to the middle of the left side between the rear airbag 16 and the front airbag 17, and the front airbag 17 is fixedly connected inside the front leg fixing sleeve 4. After the patient's legs are fixed on the rear leg fixing sleeve 3 and the front leg fixing sleeve 4, the rear airbag 16 and the front airbag 17 inside the rear leg fixing sleeve 3 and the front leg fixing sleeve 4 are inflated through the upper inflation and deflation head 18. The rear airbag 16 and the front airbag 17 are closely fitted between the rear and front leg fixing sleeves 3 and 4 and the patient's calves, which can not only reinforce the rear and front leg fixing sleeves 3 and 4 and the patient's calves to prevent the rear and front leg fixing sleeves 3 and 4 and the patient's calves from shifting and improve the fixation firmness, but also increase the fitting area between the rear and front leg fixing sleeves 3 and 4 and the patient's calves and realize elastic connection, so that the patient can wear it more comfortably and improve the patient's comfort.

[0038] Preferably, an upper inflation and deflation head 18 is connected to the upper side of the rear end of the rear airbag 16, and the upper inflation and deflation head 18 penetrates backwards into the upper side of the rear end of the leg rear fixing sleeve 3, and an upper sealing ring 19 is fixedly connected to the rear end of the upper inflation and deflation head 18. An upper sealing head 20 is provided at the front end of the upper sealing ring 19, and an upper deflation push rod 21 is fixedly connected to the center of the rear end of the upper sealing head 20. The upper deflation push rod 21 penetrates backwards into the interior of the upper sealing ring 19, and a gap is provided between the upper deflation push rod 21 and the upper sealing ring 19, and extends backwards. To the outside of the rear end of the upper inflation and deflation head 18, an upper sealing spring 22 is provided at the rear end of the upper sealing head 20, and an upper limit ring 23 is provided at the rear end of the upper sealing spring 22. The upper limit ring 23 is fixedly connected to the rear end of the upper inflation and deflation head 18. A plurality of vents are provided inside the outer sides of the upper sealing head 20 and the upper limit ring 23, and the upper inflation and deflation head 18 and the upper sealing head 20 are elastically connected to the interior of the upper inflation and deflation head 18 through the upper sealing spring 22 and the upper limit ring 23. When the rear airbag 16 and the front airbag are in contact with each other, the airbag 16 and the front airbag 16 are in contact with each other. When the upper airbag 17 is inflated, the air pump fills high-pressure gas into the interior of the rear end of the upper inflation and deflation head 18, and pushes the upper sealing head 20 and the upper deflation push rod 21 backwards by the high-pressure gas, thereby connecting the interiors of the front and rear ends of the upper inflation and deflation head 18, and filling the gas into the interior of the rear airbag 16, and the rear airbag 16 then fills the gas into the interior of the front airbag 17 through the connecting pipe. When the inflation stops, the upper sealing head 20 and the upper deflation push rod 21 are blocked at the rear end of the upper sealing ring 19 under the action of the upper sealing spring 22. Prevent air leakage and ensure that the rear airbag 16 and the front airbag 17 can fit tightly between the rear leg fixing sleeve 3 and the front leg fixing sleeve 4 and the patient's calf. When the barefoot orthosis needs to be removed, press the upper deflation push rod 21 forward to connect the front and rear ends of the upper inflation and deflation head 18 again, so that the gas inside the rear airbag 16 and the front airbag 17 can be discharged from the upper inflation and deflation head 18, making it easier to wear and remove the barefoot corrector, improving the convenience of wearing and removing, and improving the efficiency of wearing and removing.

[0039] Preferably, an inner airbag 24 is arranged inside the foot limit plate 1, and a plurality of airbag columns 25 are arranged on the upper end of the inner airbag 24, and the upper ends of the plurality of airbag columns 25 are all upwardly penetrated inside the upper end of the foot limit plate 1, and protrude outside the upper end of the foot limit plate 1, and the rear end of the inner airbag 24 is connected to a lower inflation and deflation head 26 through a connecting pipe, and a lower sealing ring 27 is fixedly connected to the rear end of the lower inflation and deflation head 26, and a lower sealing head 28 is clamped inside the rear end of the lower sealing ring 27, and a plurality of ventilation grooves are provided inside the outer side of the lower sealing head 28, and a lower sealing head 28 is fixedly connected to the center of the front end of the lower sealing head 28. A lower deflation push rod 29 is connected, and the lower deflation push rod 29 passes through the lower sealing ring 27. A gap is set between the lower deflation push rod 29 and the lower sealing ring 27, and extends backward to the rear end of the lower inflation and deflation head 26. A lower sealing spring 30 is set inside the rear end of the lower sealing head 28, and is elastically connected to the lower inflation and deflation head 26 through the lower sealing spring 30. When the patient walks with the barefoot corrector, the foot limit plate 1 can massage and stimulate the acupuncture points on the sole of the foot through the multiple air bag columns 25 protruding from the upper end, thereby improving the treatment and rehabilitation effect of the patient. At the same time, the patient can prevent the sole of the foot from sliding and the foot limit plate 1 through the multiple airbag columns 25, thereby improving the anti-slip effect. The airbag columns 25 are connected to the inner airbag 24, and can be inflated and deflated inside through the lower inflation and deflation head 26. When the inner airbag 24 and the multiple airbag columns 25 are inflated, the high-pressure gas pushes open the lower sealing head 28, thereby connecting the interior of the front and rear ends of the lower inflation and deflation head 26, and inflating the inner airbag 24 and the multiple airbag columns 25 through the lower inflation and deflation head 26 and the connecting pipe. After the inflation is completed, the lower sealing head 28 can be The lower sealing spring 30 is sealed inside the lower inflation and deflation head 26 to prevent air leakage. When the inner airbag 24 and the multiple airbag columns 25 need to be deflated, the lower deflation push rod 29 is pressed forward to connect the front and rear ends of the lower inflation and deflation head 26 again, so that the gas inside the inner airbag 24 and the multiple airbag columns 25 can be discharged through the lower inflation and deflation head 26, thereby adjusting the softness and hardness of the multiple airbag columns 25, and then adjusting the massage and stimulation intensity of the multiple airbag columns 25 on the soles of the patient's feet, ensuring reasonable massage and stimulation, and avoiding excessive massage and stimulation or insufficient massage and stimulation intensity.

[0040] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable 3D printed ankle-foot orthosis, characterized in that: The invention comprises a foot stop plate (1), the rear side of the upper end of the foot stop plate (1) is rotatably connected to two adjustment connecting rods (2) through a swivel seat, and the two adjustment connecting rods (2) are respectively located on the left and right sides of the upper end of the foot stop plate (1), the upper ends of the two adjustment connecting rods (2) are fixedly connected to a leg rear fixing sleeve (3) with an opening facing forward, the left side of the opening of the leg rear fixing sleeve (3) is connected to a leg front fixing sleeve (4) through a flexible connecting belt, the right end of the leg front fixing sleeve (4) is connected to the right side of the opening of the leg rear fixing sleeve (3) through a magic adhesive (5), and the foot The front left and right sides of the foot limit plate (1) and the leg rear fixing sleeve (3) are connected to support spring sheets (7) through two support rotating seats (6). The four support rotating seats (6) are respectively rotatably connected to the front and rear ends of the two support spring sheets (7), and are respectively fixedly connected to the front side of the upper end of the foot limit plate (1) and the left and right sides of the opening of the leg rear fixing sleeve (3). A plurality of force adjusting spring sheets (8) are arranged inside the upper ends of the two support spring sheets (7), and the support spring sheets (7) and the force adjusting spring sheets (8) are both arranged in an arc shape protruding toward the front side and are elastic.

2. An adjustable 3D printed ankle-foot orthosis according to claim 1, characterized in that: The force regulating spring piece (8) is fixedly connected to the interior of the upper end of the supporting spring piece (7) via two limiting slots (9) and two limiting clamping heads (10); the two limiting slots (9) are arranged inside the front and rear sides of the upper end of the supporting spring piece (7); the two limiting clamping heads (10) are respectively clamped inside the two limiting slots (9) and fixedly connected to the front and rear ends of the force regulating spring piece (8).

3. An adjustable 3D printed ankle-foot orthosis according to claim 2, characterized in that: A fixing stud (11) is fixedly connected at the center of the inner wall of the lower end of the limiting clamping groove (9), and the fixing stud (11) penetrates the inside of the limiting clamping head (10). A fixing nut (12) is arranged at the upper end of the uppermost limiting clamping head (10), and the fixing nut (12) is threadedly connected to the outside of the upper end of the fixing stud (11). A sleeve-type wrench (13) is fixedly connected to the outer side of the upper end of the fixing nut (12).

4. An adjustable 3D printed ankle-foot orthosis according to claim 3, characterized in that: The upper end of the fixing nut (12) is provided with a locking nut (14), and the locking nut (14) is threadedly connected to the outside of the upper end of the fixing stud (11) and is located inside the lower end of the outer sleeve spanner (13). The outer side of the upper end of the locking nut (14) is fixedly connected to an inner sleeve spanner (15), and the inner sleeve spanner (15) penetrates upwards into the upper end of the outer sleeve spanner (13).

5. The adjustable 3D printed ankle-foot orthosis according to claim 1, characterized in that: A rear airbag (16) opening toward the front side is fixedly connected inside the rear leg fixing sleeve (3), and the front end of the rear airbag (16) is connected to the front airbag (17) via a connecting pipe, and the connecting pipe is connected to the middle of the left side between the rear airbag (16) and the front airbag (17), and the front airbag (17) is fixedly connected inside the front leg fixing sleeve (4).

6. The adjustable 3D printed ankle-foot orthosis according to claim 5, characterized in that: The upper side of the rear end of the rear airbag (16) is connected to an upper inflation and deflation head (18), and the upper inflation and deflation head (18) penetrates rearwardly into the upper side of the rear end of the leg rear fixing sleeve (3), and an upper sealing ring (19) is fixedly connected to the rear end of the upper inflation and deflation head (18), and an upper sealing head (20) is arranged at the front end of the upper sealing ring (19), and an upper deflation push rod (21) is fixedly connected to the center of the rear end of the upper sealing head (20).

7. An adjustable 3D printed ankle-foot orthosis according to claim 6, characterized in that: The upper deflation push rod (21) penetrates the interior of the upper sealing ring (19) backwards, and a gap is provided between the upper sealing ring (19), and extends backwards to the outside of the rear end of the upper inflation and deflation head (18). The rear end of the upper sealing head (20) is provided with an upper sealing spring (22), and the rear end of the upper sealing spring (22) is provided with an upper limit ring (23).

8. An adjustable 3D printed ankle-foot orthosis according to claim 7, characterized in that: The upper limit ring (23) is fixedly connected to the rear end of the upper inflation and deflation head (18), and a plurality of vent holes are arranged inside the outer sides of the upper sealing head (20) and the upper limit ring (23). The upper inflation and deflation head (18) and the upper sealing head (20) are elastically connected to the interior of the upper inflation and deflation head (18) via an upper sealing spring (22) and the upper limit ring (23).

9. The adjustable 3D printed ankle-foot orthosis according to claim 1, characterized in that: An inner airbag (24) is arranged inside the foot limit plate (1), and a plurality of airbag columns (25) are arranged at the upper end of the inner airbag (24), and the upper ends of the plurality of airbag columns (25) all penetrate upwards inside the upper end of the foot limit plate (1) and protrude outside the upper end of the foot limit plate (1), and the rear end of the inner airbag (24) is connected to a lower inflation and deflation head (26) through a connecting pipe, and a lower sealing ring (27) is fixedly connected to the rear end of the lower inflation and deflation head (26), and a lower sealing head (28) is clamped inside the rear end of the lower sealing ring (27).

10. The adjustable 3D printed ankle-foot orthosis according to claim 9, characterized in that: A plurality of ventilation grooves are provided inside the outer side of the lower sealing head (28); a lower deflation push rod (29) is fixedly connected to the center of the front end of the lower sealing head (28); the lower deflation push rod (29) passes through the interior of the lower sealing ring (27); a gap is provided between the lower deflation push rod (29) and the lower sealing ring (27), and the deflation push rod (29) extends backward to the exterior of the rear end of the lower inflation and deflation head (26); a lower sealing spring (30) is provided inside the rear end of the lower sealing head (28), and the lower deflation push rod (29) is elastically connected to the interior of the lower inflation and deflation head (26) through the lower sealing spring (30).

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