Adjustable limb fixing brace

Abstract

The invention relates to the technical field of medical auxiliary instruments, and discloses an adjustable limb fixing brace which comprises a fixing mechanism, the fixing mechanism comprises a fixing band, and the adjustable limb fixing brace further comprises an air bag arranged on the inner side of the fixing band and used for being attached to a human limb to fix a wound part; the air inflation assembly is arranged on the outer side of the fixing band and used for converting the air bag from the compressed state to the expanded state; and the fine adjustment assembly is arranged between the air bag and the inflation assembly. According to the adjustable limb fixing brace, air inflation of the air bag is completed through the air inflation assembly to achieve uniform pressure distribution, the problems of stress shielding and local compression caused by rigid connection of an integrated brace are solved, and when a wound part of a patient swells, the fine adjustment assembly allows the air bag to be adjusted in real time according to the limb swelling degree; therefore, the problems that the pressure intensity at a fixed point is too large and single-point stress is concentrated are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical auxiliary devices, and particularly relates to an adjustable limb fixing brace. Background Art

[0002] Orthopedics is one of the most common departments in major hospitals. It mainly studies the anatomy, physiology, and pathology of the musculoskeletal system, and uses drugs, surgery, and physical methods to maintain and develop the normal form and function of this system. Fixation in orthopedic trauma first aid is a key link to protect patients by scientifically restricting the movement of the injured limb. Its core functions include preventing the fracture ends from shifting and damaging blood vessels and nerves, reducing pain stimulation to reduce the occurrence of complications, and avoiding further injury and discomfort.

[0003] Trauma limb fixation devices are divided into two types: internal fixation and external fixation. Among them, external fixation usually uses one-piece braces such as upper limb abduction frames and plaster fixation braces made of metal sheets, or a limb fixation device disclosed in the publication number CN112336506A, which prefabricates a thermoplastic fixation brace that matches the shape of the patient's limb to play a role in stable support. However, in the actual application process of patients, phenomena such as postoperative trauma reactions and blood circulation disorders may cause limb swelling. However, the existing limb fixation braces cannot be adaptively adjusted according to the swelling site, resulting in stress shielding that may be generated by the rigid connection of the one-piece brace, which may cause compression on local tissues, affect blood circulation, further aggravate swelling, and even may lead to pressure sores.

[0004] Therefore, an adjustable limb fixing brace is proposed to solve some problems existing in the above-mentioned prior art, which has the ability of dynamic adjustment to adapt to different swelling changes while maintaining the fixing effect. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem that the existing limb fixation brace cannot be adaptively adjusted according to the swelling site of the patient in the later stage, resulting in stress shielding that may be generated by the rigid connection of the one-piece brace, which may cause compression on local tissues and affect blood circulation, and to propose an adjustable limb fixing brace.

[0006] In order to solve the problems existing in the prior art, the present invention adopts the following technical scheme: an adjustable limb fixing brace, including a fixing mechanism, the fixing mechanism includes a fixing belt, and further includes: An airbag, the airbag is arranged inside the fixing belt, and the airbag is used to fit the human limb to fix the trauma site; An inflation assembly, the inflation assembly is arranged outside the fixing belt, and the inflation assembly is used to change the airbag from a compressed state to an inflated state; A fine-tuning component is arranged between the airbag and the inflation component, and is used to adjust the state of the airbag to adapt it to the swollen part.

[0007] Furthermore, the airbag is in the form of a cylindrical mesh cage as a whole, and the length of the airbag is adapted to the width of the fixing belt, and the airbag can be radially expanded by air pressure; The airbag includes an airbag body, the outer wall of which is provided with a limit strip, a ventilation cavity is opened in the limit strip, and the ventilation cavity is connected with the inner cavity of the airbag body, an air inlet pipe is provided at one end of the limit strip, and the other end of the air inlet pipe is connected with the inflation assembly.

[0008] Furthermore, the fixing belt is made of a flexible material, and the fixing belt is designed to have a "C"-shaped opening as a whole, and a cavity for installing the airbag is opened on the inner side of the fixing belt.

[0009] Furthermore, the inflation component includes an extension portion integrally formed and arranged on the outside of the fixing belt, and a pressing plate is slidably arranged on the inner side of the extension portion; a first one-way valve and an air outlet rigid pipe are arranged on the wall of the extension portion, and the air outlet rigid pipe is located at the bottom of the first one-way valve, and an external thread for installing the air inlet pipe is opened on the outer wall of the air outlet rigid pipe.

[0010] Furthermore, the inner cavity of the air outlet hard pipe is provided with a second one-way valve; The gas in the second one-way valve flows from the extension portion to the air inlet pipe, and the gas in the first one-way valve flows from the outside to the extension portion.

[0011] Furthermore, a sliding rod is provided on the outer wall of the pressing plate, and one end of the sliding rod is slidably connected to the inner side of the extending portion, and a reset member is provided between the end of the sliding rod and the inner wall of the extending portion.

[0012] Furthermore, the fine-tuning assembly includes an adjusting cylinder arranged between the first one-way valve and the air inlet pipe, the adjusting cylinder is arranged on the wall of the air outlet hard pipe for damping rotation, and the top of the adjusting cylinder extends to the outside of the air outlet hard pipe.

[0013] Furthermore, an exhaust hole connected to the outside is opened in the adjusting cylinder, and the exhaust hole is "L" shaped as a whole. A straight hole is opened in the adjusting cylinder, the axis of the straight hole coincides with the axis of the exhaust pipe, and the diameter of the straight hole is smaller than the inner diameter of the exhaust pipe.

[0014] Furthermore, the straight hole and the exhaust hole are arranged to be vertically crossed, and the straight hole and the exhaust hole are not communicated with each other.

[0015] Furthermore, a toggle ring is fixedly sleeved on the outer wall of the adjusting cylinder, and a dustproof net is arranged on the top of the adjusting cylinder.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the present invention, the inflation assembly is used to inflate the airbag with a uniform pressure distribution, avoiding the stress shielding and local compression problems caused by the rigid connection of the one-piece brace. When there is swelling in the trauma area of the patient, the fine-tuning assembly allows the airbag to be adjusted in real time according to the degree of limb swelling, thus avoiding the problems of excessive pressure at the fixation point and single-point stress concentration.

[0017] 2. In the present invention, by pushing the groove on the pressing plate with a finger, the pressing plate slides reciprocally inside the extension part. When the pressing plate slides towards the direction close to the hard air outlet pipe, the gas inside the extension part will be compressed, and the gas will be discharged into the air inlet pipe through the second one-way valve; when the finger is released, during the reset process of the pressing plate, the space inside the extension part increases, forming a negative pressure, and thus external gas is inhaled through the first one-way valve. Patients or caregivers can easily achieve the inflation operation of the airbag only by pressing the pressing plate with a finger without relying on an external power source or complex inflation equipment. The operation is simple and convenient for outdoor or emergency use.

[0018] 3. In the present invention, when there is swelling in the limb trauma area and it is necessary to reduce the pressure of the airbag body, rotate the adjustment cylinder to connect the exhaust hole with the hard air outlet pipe; at this time, the gas inside the airbag body can be discharged to the outside through the air inlet pipe, the hard air outlet pipe, and the exhaust hole, thereby reducing the pressure inside the airbag body, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 It is a schematic diagram of the structure after the airbag is disassembled in an embodiment of the present invention; Figure 3 It is a schematic diagram of the structure of the airbag in an embodiment of the present invention; Figure 4 It is an embodiment of the present invention Figure 2 The enlarged schematic diagram of the partial structure at A in; Figure 5 It is a schematic diagram of the structure of the pressing plate in an embodiment of the present invention; Figure 6 It is a cross-sectional view of the structure of the extension part in an embodiment of the present invention; Figure 7 It is a cross-sectional view of the structure of the hard air outlet pipe in an embodiment of the present invention; Figure 8 It is a schematic cross-sectional structural diagram of the regulating cylinder according to an embodiment of the present invention.

[0021] The numbers in the figure represent respectively: 100, fixing mechanism; 101, fixing belt; 200, airbag; 201, airbag body; 202, limit strip; 203, air inlet pipe; 300, inflation component; 301, extension part; 302, pressing plate; 303, first one-way valve; 304, air outlet hard pipe; 305, second one-way valve; 306, sliding rod; 307, reset part; 400, fine-tuning component; 401, adjusting cylinder; 402, exhaust hole; 403, straight hole; 404, toggle ring. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0023] The present invention will be further described below in conjunction with the embodiments.

[0024] Example 1, reference Figures 1 - 3 , which is the first embodiment of the present invention, provides an adjustable limb fixation brace, including a fixing mechanism 100 , and the fixing mechanism 100 includes a fixing belt 101 .

[0025] In actual use by patients, traumatic reactions and blood circulation disorders after surgery may lead to limb swelling, but existing limb fixation braces cannot be adjusted according to the location of the swelling, resulting in stress shielding caused by the rigid connection of the one-piece brace, which will cause compression to local tissues, affect blood circulation, further aggravate swelling, and even cause pressure sores; and although a single simple fixation belt 101 can be adjusted according to the size of the patient's swelling 9, such as adjusting the Velcro gear to change the degree of tension, the pressure at the Velcro fixing point can be 2-3 times that of other areas, single-point stress concentration, unbalanced pressure distribution, and is not conducive to the patient's recovery from trauma.

[0026] The adjustable limb fixation brace further includes: an airbag 200 detachably installed on the inner side of the fixing strap 101, and the airbag 200 is used to fit the human limb to fix the trauma site; an inflation assembly 300 installed on the outer side of the fixing strap 101, and the inflation assembly 300 is used to change the airbag 200 from a compressed state to an inflated state; a fine-tuning assembly 400 installed between the airbag 200 and the inflation assembly 300, and the fine-tuning assembly 400 is used to adjust the state of the airbag 200 to adapt to the swollen part.

[0027] Specifically, after the airbag 200 is inflated, it directly contacts the patient's limb. When the limb swells due to trauma reaction, blood circulation disorder, etc., the airbag 200 can adapt to the limb change by changing its own shape and pressure. It is made of soft, elastic and biocompatible materials such as medical silicone, which can not only effectively fit the limb to fix the trauma site, but also ensure comfort during inflation and deflation, avoiding additional damage to the skin.

[0028] Specifically, the inflation assembly 300 can be a manual pressure-regulating air pump (such as a common rubber ball air pump) or an electric air pump to inflate the airbag 200 to change it from a compressed state to an inflated state to maintain an appropriate fixation pressure on the limb. For example, when the patient's limb gradually swells after surgery and the pressure of the airbag 200 decreases, manually press the air pump of the inflation assembly 300, and the gas enters the airbag 200 through the connecting air pipe, causing the airbag 200 to expand and maintaining a stable fixation force on the limb to prevent fixation failure.

[0029] Specifically, the fine-tuning assembly 400 can be composed of a pressure sensor installed on the inner side of the fixing strap 101 and a solenoid valve installed on the outer side. The solenoid valve controls the inlet and outlet direction and flow rate of the gas to achieve precise adjustment of the pressure of the airbag 200. However, the pressure sensor and the solenoid valve need to be connected to a power supply or battery for power supply, which is likely to cause inconvenience in outdoor or emergency use, resulting in the inability of the limb fixation brace to adjust in real time according to limb swelling, greatly affecting the fixation effect, and even possibly causing secondary injury to the injured limb due to improper pressure.

[0030] Specifically, the inflation of the airbag 200 by the inflation assembly 300 results in a uniform pressure distribution, avoiding the problems of stress shielding and local compression caused by the rigid connection of the one-piece brace. When the trauma site of the patient swells, the fine-tuning assembly 400 allows the airbag 200 to be adjusted in real time according to the degree of limb swelling, thus avoiding the problems of excessive pressure at the fixation point and single-point stress concentration.

[0031] Refer to Figure 3, the airbag 200 is generally in the shape of a cylindrical cage, which is conducive to air circulation. Under the premise of ensuring the strength of a solid structure of ≥90%, the weight of the cage structure is reduced by more than 40%, and at the same time, about 35% of the material cost is saved, meeting the lightweight trend of modern industry. Moreover, the length of the airbag 200 is adapted to the width of the fixing belt 101, and the airbag 200 can be expanded radially in a pneumatic manner; the airbag 200 includes an airbag body 201, a limiting strip 202 is arranged on the outer wall of the airbag body 201, a ventilation cavity (not shown in the figure) is opened in the limiting strip 202, and the ventilation cavity is communicated with the inner cavity of the airbag body 201. One end of the limiting strip 202 is provided with an air inlet pipe 203, and the other end of the air inlet pipe 203 is communicated with the inflation assembly 300.

[0032] Specifically, first insert the limiting strip 202 into the inner wall of the fixing belt 101 so that the airbag body 201 is installed inside the fixing belt 101. Then, surround the airbag body 201 around the limb trauma site (and fix the fixing belt 101 by means of Velcro or a buckle). Then, generate and convey gas to the air inlet pipe 203 through the inflation assembly 300, so that the airbag body 201 expands radially in a pneumatic manner, changing from the initial flat state to the inflated state, so as to evenly fit on the surface of the patient's limb and provide a stable fixing pressure for the limb. When the patient's limb swells due to trauma reaction, blood circulation disorder, etc., the pressure generated by the limb on the airbag body 201 will change. At this time, the state of the airbag 200 can be adjusted in real time according to the degree of limb swelling, and the fine-tuning assembly 400 can control the gas to be discharged from the airbag 200 to avoid excessive pressure on the swollen part of the limb.

[0033] Refer to Figure 2 , the fixing belt 101 is made of a flexible material, and the fixing belt 101 is generally designed with a "C"-shaped opening. A cavity for installing the airbag 200 is opened inside the fixing belt 101, and through holes for ventilation are opened on the surface of the fixing belt 101. A Velcro (as Figure 1 shown) or a buckle is provided at the opening of the fixing belt 101 to facilitate the quick connection and disassembly of the fixing belt 101 and meet the fixing requirements for different limb sizes. In actual use, when medical staff need to wear a fixing brace for a patient, they can adjust the tightness of the fit through Velcro according to the thickness of the patient's limb, or use a buckle for quick and firm connection. It can not only ensure that the fixing belt 101 tightly surrounds the limb, prevent the fixing brace from shifting during the patient's daily activities, and ensure stable fixation of the trauma site; but also easily open the fixing belt 101 when the patient needs limb examination, wound dressing change or adjustment of the fixing position, improving the convenience of operation and reducing the interference and discomfort to the patient.

[0034] Specifically, the fixing band 101 can be integrally formed with a photocuring material (such as polyurethane acrylate, epoxy resin, etc.), which has high hardness and wear resistance; the fixing band 101 can also be made of a photo-thermal composite material, maintaining the high hardness formed by photocuring at room temperature to provide stable support. After applying specific wavelength light (such as 365nm ultraviolet light) or heating to the Tg temperature (60 - 80°C), it softens and the shape can be manually adjusted. After cooling, it resumes rigidity. In this way, the fixing band 101 can achieve reversible stiffness change through photo-thermal response; the fixing band 101 can also be manufactured with flexible braided wires, which have excellent softness and bendability, can adapt to objects of different shapes and movements, provide a comfortable fixing effect, and are especially suitable for parts that need to fit the human body curve or have a certain degree of mobility, with low cost and convenient for folding and storage.

[0035] As a basic carrier, the fixing band 101 surrounds the limb to provide preliminary restraint. Preferably, it is made of a flexible material with a certain strength and flexibility, can withstand a certain tensile force and make the airbag body 201 fit the limb contour, and is lighter in weight.

[0036] Example 2, referring to Figures 1 - 7 , is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the inflation assembly 300 includes an extension part 301 integrally formed and connected to the outside of the fixing band 101. A pressing plate 302 is slidably installed inside the extension part 301. A groove (such as Figure 5 shown) for the finger pulp to push is formed on the wall of the pressing plate 302; a first one-way valve 303 and an air outlet hard tube 304 are installed on the wall of the extension part 301, and the air outlet hard tube 304 is located at the bottom of the first one-way valve 303. External threads for installing the air inlet tube 203 are formed on the outer wall of the air outlet hard tube 304.

[0037] Referring to Figure 6 and Figure 7 , a second one-way valve 305 is installed in the inner cavity of the air outlet hard tube 304; the gas flow direction in the second one-way valve 305 is from the extension part 301 to the inside of the air inlet tube 203, and the gas flow direction in the first one-way valve 303 is from the outside to the inside of the extension part 301.

[0038] Specifically, the extension part 301 is integrally formed with the fixing belt 101, providing a mounting base for other parts, and forming a relatively closed space for the pressing plate 302 to slide inside it to realize the inflation function; the air inlet pipe 203 and the air outlet hard pipe 304 are sealed and installed, and the pressing plate 302 is pushed by the finger to make the pressing plate 302 slide back and forth inside the extension part 301. When the pressing plate 302 slides in the direction close to the air outlet hard pipe 304, the gas in the extension part 301 is compressed, and the gas is discharged into the air inlet pipe 203 through the second one-way valve 305; when the finger is released and the pressing plate 302 is reset, the space in the extension part 301 increases, forming a negative pressure, thereby inhaling external gas through the first one-way valve 303. Patients or caregivers can easily inflate the airbag 200 by pressing the pressing plate 302 with their fingers without the help of an external power source or complex inflation equipment. The operation is simple and convenient for outdoor or emergency use.

[0039] Reference Figure 6 A slide bar 306 is welded or fixedly installed on the outer wall of the pressing plate 302 , and one end of the slide bar 306 is slidably connected to the inner side of the extension part 301 , and a reset member 307 is connected between the end of the slide bar 306 and the inner wall of the extension part 301 .

[0040] Specifically, the reset member 307 is preferably a compression spring or elastic metal sheet that can withstand axial pressure. When the slide bar 306 moves toward the inner side of the extension portion 301 along with the pressing plate 302, the reset member 307 is compressed to store elastic energy. After the pressing plate 302 is released, the pressing plate 302 is automatically reset under the elastic action of the reset member 307. The rest of the structure is the same as that of the first embodiment.

[0041] Example 3, reference Figures 1 - 8 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: the fine-tuning component 400 includes an adjusting cylinder 401 installed between the first one-way valve 303 and the air inlet pipe 203, the adjusting cylinder 401 is installed on the wall of the air hard pipe 304 for damping rotation, and the top of the adjusting cylinder 401 extends to the outside of the air outlet hard pipe 304; a toggle ring 404 is fixedly sleeved on the outer wall of the adjusting cylinder 401, and a dustproof net is detachably installed on the top of the adjusting cylinder 401.

[0042] Specifically, the patient or the caregiver can operate the adjustment cylinder 401 to rotate by turning the ring 404. When the adjustment cylinder 401 rotates, its internal structure will change the gas flow direction in the air outlet tube 304. The dustproof net can prevent external dust and other impurities from entering the adjustment cylinder 401, thereby avoiding problems such as blockage of the adjustment cylinder 401 or the air outlet tube 304 due to impurities entering the gas channel, thereby affecting exhaust or air intake, ensuring the long-term stable operation of the fine-tuning component 400 and maintaining the accuracy of pressure regulation of the airbag 200.

[0043] Reference Figure 7 and Figure 8 An exhaust hole 402 connected to the outside is opened in the regulating cylinder 401, and the exhaust hole 402 is "L"-shaped as a whole. A straight hole 403 is opened in the regulating cylinder 401, and the axis of the straight hole 403 coincides with the axis of the exhaust pipe 304, and the diameter of the straight hole 403 is smaller than the inner diameter of the exhaust pipe 304; the straight hole 403 and the exhaust hole 402 are vertically crossed, and the straight hole 403 and the exhaust hole 402 are not connected to each other.

[0044] Specifically, when the airbag 200 needs to be inflated, the adjusting cylinder 401 is rotated to align the straight hole 403 with the outlet tube 304. Since the straight hole 403 is connected to the inner cavity of the outlet tube 304, the gas can smoothly flow from the extension 301 through the outlet tube 304, the straight hole 403, and the inlet tube 203 into the airbag body 201. When swelling occurs at the site of the limb injury and the pressure of the airbag body 201 needs to be reduced, the adjusting cylinder 401 is rotated to connect the exhaust hole 402 with the outlet tube 304; at this time, the gas in the airbag body 201 can be discharged to the outside through the inlet tube 203, the outlet tube 304, and the exhaust hole 402, thereby reducing the pressure in the airbag body 201, and the operation is convenient.

[0045] Specifically, since the exhaust hole 402 is in an "L" shape, this structure can control the speed of gas exhaust to a certain extent, and avoid discomfort to the limbs caused by a sudden drop in pressure. The rest of the structure is the same as that of the second embodiment.

[0046] Based on Examples 1-3, the working principle of the present invention is as follows: The working principle of the adjustable limb fixation brace of the present invention is as follows: in actual application, first select the appropriate size of the airbag 200 according to the thickness of the patient's limbs, install the airbag body 201 on the inner side of the fixing belt 101, push the pressing plate 302 to slide in the extension part 301 by fingers, and use the first one-way valve 303 and the second one-way valve 305 to control the gas flow direction to achieve manual inflation, so that the airbag 200 changes from a compressed state to an expanded state, so that the airbag body 201 and the fixing belt 101 evenly fit the limbs and provide fixation pressure. When the limbs swell due to trauma reaction or blood circulation disorder, the patient or nursing staff rotates the adjustment cylinder 401 by turning the ring 404 to change the gas flow direction in the air outlet hard tube 304, and exhausts when the exhaust hole 402 is connected to the air outlet hard tube 304, thereby adjusting the pressure of the airbag 200 in real time, avoiding stress shielding, local compression and single-point stress concentration problems, ensuring the limb fixation effect, and promoting trauma recovery.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the present invention in each embodiment.

Claims

1. An adjustable limb fixation brace, comprising a fixation mechanism (100), the fixation mechanism (100) comprising a fixation strap (101), characterized in that, It further includes: An airbag (200), which is arranged inside the fixing belt (101), and the airbag (200) is used to fit the human limb to fix the trauma site; An inflation assembly (300), which is arranged outside the fixing belt (101), and the inflation assembly (300) is used to change the airbag (200) from a compressed state to an inflated state; A fine-tuning assembly (400), which is arranged between the airbag (200) and the inflation assembly (300), and the fine-tuning assembly (400) is used to adjust the state of the airbag (200) to adapt to the swollen part.

2. The adjustable limb fixing brace according to claim 1, wherein, The airbag (200) is integrally in the shape of a cylindrical cage, and the length of the airbag (200) is adapted to the width of the fixing belt (101), and the airbag (200) can be expanded radially in a pneumatic manner; The airbag (200) includes an airbag body (201), a limiting strip (202) is arranged on the outer wall of the airbag body (201), a ventilation cavity is opened in the limiting strip (202), and the ventilation cavity is communicated with the inner cavity of the airbag body (201). One end of the limiting strip (202) is provided with an air inlet pipe (203), and the other end of the air inlet pipe (203) is communicated with the inflation assembly (300).

3. The adjustable limb fixation brace according to claim 1 or 2, characterized in that The fixing belt (101) is made of a flexible material, and the fixing belt (101) is integrally designed with a "C"-shaped opening, and a cavity for installing the airbag (200) is opened inside the fixing belt (101).

4. The adjustable limb fixation brace according to claim 2, wherein, The inflation assembly (300) includes an extension part (301) integrally formed on the outside of the fixing belt (101), and a pressing plate (302) is slidably arranged inside the extension part (301); a first one-way valve (303) and an air outlet hard pipe (304) are arranged on the wall body of the extension part (301), and the air outlet hard pipe (304) is located at the bottom of the first one-way valve (303), and an external thread for installing the air inlet pipe (203) is opened on the outer wall of the air outlet hard pipe (304).

5. The adjustable limb fixation brace according to claim 4, wherein, A second one-way valve (305) is arranged in the inner cavity of the air outlet hard pipe (304); The gas flow direction in the second one-way valve (305) is from the extension part (301) to the air inlet pipe (203), and the gas flow direction in the first one-way valve (303) is from the outside to the extension part (301).

6. The adjustable limb fixation brace according to claim 4, wherein, A sliding rod (306) is arranged on the outer wall of the pressing plate (302), and one end of the sliding rod (306) is slidably connected to the inside of the extension part (301), and a reset part (307) is arranged between the end of the sliding rod (306) and the inner wall of the extension part (301).

7. The adjustable limb fixing brace according to claim 6, wherein, The fine-tuning assembly (400) includes an adjusting cylinder (401) arranged between the first one-way valve (303) and the air inlet pipe (203), the adjusting cylinder (401) is rotatably arranged on the wall body of the air outlet hard pipe (304) with damping, and the top of the adjusting cylinder (401) extends to the outside of the air outlet hard pipe (304).

8. The adjustable limb fixing brace according to claim 7, wherein, The regulating cylinder (401) is provided with an exhaust hole (402) connected to the outside, and the exhaust hole (402) is in an "L" shape as a whole. The regulating cylinder (401) is provided with a straight hole (403), the axis of the straight hole (403) coincides with the axis of the exhaust pipe (304), and the diameter of the straight hole (403) is smaller than the inner diameter of the exhaust pipe (304).

9. The adjustable limb fixing brace according to claim 8, wherein The straight hole (403) and the exhaust hole (402) are arranged to cross each other vertically, and the straight hole (403) and the exhaust hole (402) are not connected to each other.

10. The adjustable limb fixation brace according to claim 7 or 8, characterized in that, A toggle ring (404) is fixedly sleeved on the outer wall of the adjusting cylinder (401), and a dustproof net is arranged on the top of the adjusting cylinder (401).

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