Knee bending assisting device for knee joint rehabilitation

Abstract

The invention discloses a knee bending assisting device for knee joint rehabilitation, and relates to the technical field of knee joint rehabilitation, the knee bending assisting device comprises a wheelchair, the wheelchair comprises a connecting plate, the rehabilitation assembly is assembled at the top of the connecting plate, and the rehabilitation assembly comprises positioning columns fixedly installed at the top of the connecting plate, the periphery of the positioning column is rotatably connected with a placing plate, the top of the placing plate is connected with a hook-and-loop fastener, the top of the connecting plate is fixedly connected with first fixing blocks, the inner walls of the first fixing blocks are connected through a first fixing column, the periphery of the first fixing column is rotatably connected with a first rotating block, and the bottom of the placing plate is fixedly connected with a second fixing block. A second fixing column is fixedly connected between the inner walls of the second fixing blocks, a second rotating block is rotationally connected to the periphery of the second fixing column, an electric push rod is connected between the second rotating block and the first rotating block, in the lifting process, the air bag tightly wraps calf muscles, deep massage is achieved, the muscles are relaxed, and muscular atrophy is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of knee joint rehabilitation, and in particular to a knee flexion auxiliary device for knee joint rehabilitation. Background Art

[0002] Knee arthritis, as a degenerative disease of the musculoskeletal system that is common among the elderly, seriously affects the patient's daily quality of life. With the continuous advancement of medical technology, knee replacement surgery has become an important means to treat severe knee arthritis, restore joint function, and improve patients' quality of life. This surgery effectively relieves the patient's pain and restores joint stability and mobility by implanting an artificial knee joint to replace the damaged natural joint.

[0003] However, the success of knee replacement surgery does not only depend on the success of the surgery. The postoperative rehabilitation process is also crucial. It is directly related to the patient's knee function recovery and long-term quality of life. During the rehabilitation period, an important part of the rehabilitation process is knee flexion exercises, which help to strengthen the muscles around the knee joint, promote the recovery of joint flexibility, avoid joint adhesion and accelerate the repair of soft tissue.

[0004] However, it is worth noting that the current existing technologies, while focusing on knee flexion exercises, often ignore the problems of decreased calf muscle strength and muscle atrophy that may occur due to long-term bed rest or limited mobility. Calf muscle weakness and muscle atrophy will not only affect the patient's gait and walking ability, but may also further increase the burden on the knee joint and affect the rehabilitation effect. At the same time, during the early recovery of patients after knee replacement surgery, due to factors such as surgical trauma, patients may experience lower limb swelling, lower limb venous thrombosis and other problems. Existing devices cannot prevent swelling and lower limb thrombosis. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the current prior art, while focusing on knee flexion exercises, often ignores the problem of decreased calf muscle strength and muscle atrophy that may be caused by long-term bed rest or limited activity. The decreased calf muscle strength and muscle atrophy will not only affect the patient's gait and walking ability, but may also further aggravate the burden on the knee joint and affect the rehabilitation effect. At the same time, during the early rehabilitation of patients after knee replacement surgery, due to factors such as surgical trauma, patients may experience problems such as lower limb swelling and lower limb venous thrombosis. Existing devices cannot prevent swelling and lower limb thrombosis. The device of the present invention can take into account the patient's comfort, safety, and rehabilitation exercise needs. The present invention can promote the reflux of tissue fluids such as blood and lymph in the lower limbs while meeting the rehabilitation needs, thereby promoting swelling and preventing lower limb venous thrombosis; at the same time, it can strengthen the lower limb muscle strength to a certain extent and reduce the risk of lower limb muscle atrophy.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a knee flexion auxiliary device for knee joint rehabilitation: comprising a wheelchair, the wheelchair comprising a connecting plate and an avoidance opening opened on the surface of the connecting plate, and further comprising: a rehabilitation component assembled on the top of the connecting plate, and a pulling component installed on the surface of the rehabilitation component;

[0007] The rehabilitation component includes a device fixedly mounted on the top of a connecting plate, both sides of which are fixedly connected to positioning columns, and the outer periphery of the positioning columns is rotatably connected to a placement plate, a Velcro is connected to the top of the placement plate, a first fixing block is fixedly connected to the top of the connecting plate, the inner walls of the first fixing blocks are connected through the first fixing columns, the outer periphery of the first fixing columns is rotatably connected to the first rotating block, a second fixing block is fixedly connected to the bottom of the placement plate, and a second fixing column is fixedly connected between the inner walls of the second fixing blocks, the outer periphery of the second fixing column is rotatably connected to the second rotating block, and an electric push rod is connected between the second rotating block and the first rotating block;

[0008] The pulling assembly includes a linear groove and an oblique groove opened on the surface of the placement plate, the linear groove and the oblique groove are slidably connected with a massage piece inside, and the bottom of the placement plate is connected to the massage piece through a pulling piece;

[0009] As the electric push rod is lifted, the placement plate is driven to rotate with the positioning column as the center, completing the knee flexion movement of the knee joint. As the placement plate is lifted, the pulling piece at the bottom pulls the massage piece to slide in the linear groove and the oblique groove, which can squeeze and massage the calf muscles while completing the auxiliary knee flexion movement.

[0010] As a further description of the above technical solution:

[0011] The inclined grooves are arranged on both sides of the linear groove, and the two inclined grooves are arranged in a V shape.

[0012] As a further description of the above technical solution:

[0013] The massage part includes a slider slidably connected to the inside of the linear groove and a moving block slidably connected to the inside of the oblique groove, extension rods are fixedly connected to both sides of the slider, the extension rods are slidably connected to the moving block, an arc-shaped fastening block is slidably connected to the top of the moving block, the inner circle of the arc-shaped fastening block is fixedly connected to two connecting blocks, the interiors of the two connecting blocks are movably connected by a hose, the outer circle of the hose is connected to an air bag, and a closing cover is installed on one side of the hose.

[0014] As a further description of the above technical solution:

[0015] The moving block is provided with a slot inside, and a plurality of connecting columns are connected between the inner walls of the slot. The outer ring of one of the connecting columns is provided with a telescopic spring, and the two sides of the telescopic spring are respectively connected to one side of the arc-shaped fastening block and the inner wall of the slot.

[0016] As a further description of the above technical solution:

[0017] The pulling member comprises a welding block fixedly mounted on the bottom of the placement plate, the inner wall of the welding block is rotatably connected with a rotating column, the rotating column and the slider are connected via a pulling line, and the pulling line is tightened by a tightening member.

[0018] As a further description of the above technical solution:

[0019] The tensioning member comprises a plurality of support blocks connected to the top and the bottom of the connecting plate, a tensioning roller is connected between the inner walls of every two support blocks, and a groove for placing a pulling line is arranged at the center of the tensioning roller.

[0020] As a further description of the above technical solution:

[0021] A rolling assembly is connected to one side of the arc-shaped fastening block, and the rolling assembly includes a gear plate fixedly mounted on the surface of the placement plate and a mounting plate mounted on one side of the hose. A connecting rod is detachably mounted on one side of the arc-shaped fastening block, and a gear is rotatably connected to the outer periphery of the connecting rod. The mounting plate and the gear are connected by a pulley, and the gear and the gear plate are meshingly connected.

[0022] As a further description of the above technical solution:

[0023] Both sides of the gear plate are penetrated by movable grooves for avoiding sliding of the extension rod.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0025] After the airbag is prepared, the patient starts the electric push rod on the wheelchair, which extends smoothly and drives the second rotating block and the fixed structure, so that the placement plate rotates and rises around the positioning column. The synchronous movement of the first rotating block ensures a smooth process. This linkage mechanism gently stretches the knee joint and promotes functional recovery.

[0026] During the lifting process, the welding block is linked with the rotating column, and the pulling line moves smoothly along the groove of the tension roller, triggering the slider and the moving block to move obliquely and separate in the inclined groove, simulating the natural curve of the calf. This action allows the airbag to tightly wrap the calf muscles, achieve deep massage, relax muscles, prevent muscle atrophy, and promote the return of blood, lymph and other tissue fluids in the lower limbs, thereby promoting swelling, preventing lower limb venous thrombosis, and improving comfort and health benefits;

[0027] In order to avoid hard squeezing, the arc-shaped fastening block and telescopic spring mechanism are designed. When encountering muscle-rich areas, the thrust causes the arc-shaped fastening block to slide and compress the spring. The spring rebound force ensures that the airbag fits gently, which is both continuous and effective while avoiding discomfort.

[0028] In addition, a detachable connecting rod is introduced to flexibly realize the rolling massage function. After the connecting rod is installed, the gear and pulley transmission mechanism drives the hose and the airbag to rotate, forming a rolling massage effect. This innovative method deeply stimulates the muscles, promotes blood circulation, brings a new comfortable experience, meets personalized massage needs, and comprehensively improves the rehabilitation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Shows a schematic diagram of the overall structure according to the present invention;

[0030] Figure 2 A schematic diagram of the structure of the connecting plate according to the present invention is shown;

[0031] Figure 3 It shows a schematic diagram of the structure of the rehabilitation component according to the present invention;

[0032] Figure 4 It shows a schematic diagram of the structure of the pulling assembly according to the present invention;

[0033] Figure 5 It is shown that according to the present invention Figure 4 Another perspective structural diagram;

[0034] Figure 6 It is shown that according to the present invention Figure 5 The enlarged structural diagram at A in the middle;

[0035] Figure 7 It shows a schematic structural diagram of a moving block and an arc-shaped fastening block according to the present invention;

[0036] Figure 8 A schematic diagram of the placement plate structure according to the present invention is shown;

[0037] Fig. 9 It is shown that according to the present invention Figure 8 Enlarged structural diagram at B in the middle.

[0038] Legend:

[0039] 10. Wheelchair; 11. Connecting plate; 111. Escape opening;

[0040] 20. Rehabilitation component; 21. Support block; 211. Positioning column; 22. First fixed block; 221. First fixed column; 222. First rotating block; 23. Electric push rod; 24. Second fixed block; 241. Second fixed column; 242. Second rotating block; 25. Placement plate; 26. Velcro;

[0041] 30. Pulling assembly; 31. Linear groove; 311. Oblique groove; 32. Welding block; 321. Rotating column; 322. Pulling line; 33. Support block; 331. Take-up roller; 34. Slider; 341. Extension rod; 342. Moving block; 343. Slot; 35. Arc-shaped fastening block; 351. Connecting column; 352. Telescopic spring; 36. Connecting block; 361. Hose; 362. Airbag; 363. Closing cover;

[0042] 40. Rolling assembly; 41. Mounting plate; 42. Connecting rod; 43. Gear plate; 431. Moving groove; 44. Pulley; 45. Gear. DETAILED DESCRIPTION

[0043] 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.

[0044] like Figure 1-Figure 9 As shown, a knee flexion auxiliary device for knee joint rehabilitation provided by the present invention includes a wheelchair 10, the wheelchair 10 includes a connecting plate 11 and an avoidance opening 111 opened on the surface of the connecting plate 11, and also includes: a rehabilitation component 20 assembled on the top of the connecting plate 11, the rehabilitation component 20 includes 21 fixedly installed on the top of the connecting plate 11, both sides of 21 are fixedly connected with positioning columns 211, and the outer periphery of the positioning column 211 is rotatably connected to a placement plate 25, the top of the placement plate 25 is connected with a Velcro 26, the top of the connecting plate 11 is fixedly connected with a first fixed block 22, the inner walls of the first fixed block 22 are connected through a first fixed column 221, the outer periphery of the first fixed column 221 is rotatably connected to a first rotating block 222, the bottom of the placement plate 25 is fixedly connected with a second fixed block 24, and the inner walls of the second fixed block 24 are fixedly connected with a second fixed column 241, the outer periphery of the second fixed column 241 is rotatably connected to a second rotating block 242, and an electric push rod 23 is connected between the second rotating block 242 and the first rotating block 222;

[0045] Patients who have undergone knee replacement surgery can rely on the wheelchair 10 to move around during the recovery period, ensuring freedom of movement and safety. When performing knee rehabilitation on the go, the built-in rehabilitation system of the wheelchair 10 plays a unique role:

[0046] First, in order to ensure the safety and effectiveness of rehabilitation exercises, the patient needs to use the upper and lower Velcro 26 provided on both sides of the wheelchair 10 to easily and firmly fix the legs in the appropriate position. The Velcro 26 is designed to be easy to wear and provide sufficient support to avoid unnecessary movement of the legs during the rehabilitation process.

[0047] Then the patient or the caregiver needs to open the closed cover 363. This step is to expose and prepare for the subsequent inflation process of the airbag 362. Then, a proper amount of gas is injected into the airbag 362 through the vent hole in the hose 361 to gradually expand it to the optimal state. The inflated airbag 362 closely adheres to and supports the patient's calf, providing necessary assistance and protection for subsequent knee rehabilitation exercises.

[0048] After the airbag 362 is ready, the patient can start the electric push rod 23 on the wheelchair 10. The electric push rod 23 extends quickly and smoothly, and its end is closely connected with the second rotating block 242. As the electric push rod 23 is pushed forward, the second rotating block 242 is effectively driven, thereby driving the second fixed column 241 and the second fixed block 24 connected thereto to move. During this movement, the bottom of the second fixed block 24 gently presses against and pushes the placement plate 25, so that the placement plate 25 is rotated and lifted with the positioning column 211 as the center of the circle;

[0049] It is worth noting that while the electric push rod 23 is working, the first rotating block 222 also performs an appropriate amount of rotational movement on the periphery of the first fixed column 221 to ensure that the lifting process of the placement plate 25 is smoother and more stable. Through this series of precise mechanical linkages, the patient's knee joint is gently and effectively stretched and exercised, thereby promoting the recovery and improvement of joint function. By controlling the lifting height of the electric push rod 23, the problem of controlling the patient's knee flexion angle can be achieved, and the problem of controlling the length of time the patient's knee flexion stays can be achieved by controlling the stay time of the electric push rod 23.

[0050] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8As shown, and a pulling assembly 30 installed on the surface of the placement plate 25, the pulling assembly 30 includes a linear groove 31 and an oblique groove 311 opened on the surface of the placement plate 25, and the linear groove 31 and the oblique groove 311 are slidably connected with a massage piece, and the massage piece includes a slider 34 slidably connected to the inside of the linear groove 31 and a moving block 342 slidably connected to the inside of the oblique groove 311, and the two sides of the slider 34 are fixedly connected with an extension rod 341, and the extension rod 341 is slidably connected to the moving block 342, and the top of the moving block 342 is slidably connected with an arc-shaped fastening block 35, and the inner circle of the arc-shaped fastening block 35 is fixedly connected to two connecting blocks 36, and the interiors of the two connecting blocks 36 are movably connected through a hose 361, and the outer circle of the hose 361 is connected to an airbag 362 A vent hole is provided inside the hose 361, and a closing cover 363 is installed on one side of the hose 361. The bottom of the placement plate 25 is connected to the massage part through a pulling piece, and the pulling piece includes a welding block 32 fixedly installed at the bottom of the placement plate 25. The inner wall of the welding block 32 is rotatably connected to a rotating column 321. The rotating column 321 and the slider 34 are connected through a pulling line 322, and the pulling line 322 is tightened by a tightening piece. The tightening piece includes a plurality of support blocks 33 connected to the top and bottom of the connecting plate 11. A tightening roller 331 is connected between the inner walls of every two support blocks 33, and a groove for placing the pulling line 322 is provided at the center of the tightening roller 331. The inclined groove 311 is provided on both sides of the linear groove 31, and the two inclined grooves 311 are arranged in a V shape.

[0051] As the placement plate 25 gradually rises with the positioning column 211 as the center, it not only moves itself, but also drives the welding block 32 closely connected to the bottom to rise together. In this linkage process, the rotating column 321 connected to the welding block 32 realizes linear movement transmission by pulling the pulling line 322. When moving, the pulling line 322 cleverly moves along the preset groove path on the tensioning roller 331. This design ensures the smoothness and accuracy of pulling.

[0052] At the same time, the movement of the pull line 322 further triggers the synchronous sliding of the slider 34 in the linear groove 31. The movement of the slider 34 is not isolated. It drives two key moving blocks 342. The two moving blocks 342 move along the oblique path under the V-shaped guidance of the oblique groove 311 through the traction of the extension rod 341. It is worth noting that as they move deeper into the oblique groove 311, the two moving blocks 342 not only move along the direction of the oblique groove 311, but also gradually separate along the outer periphery of the extension rod 341 due to the V-shaped design of the oblique groove 311. This change cleverly simulates and fits the natural curve of the calf.

[0053] Ultimately, this movement causes the inflated airbag 362 to tightly and evenly wrap and squeeze the calf muscles, achieving a deep massage effect on the calf area. This massage not only helps to relax tense muscles and prevent muscle atrophy, but also effectively promotes blood circulation in the calf area, bringing significant comfort and health benefits to patients.

[0054] like Figure 5 , Figure 6 , Figure 7 As shown, a slot 343 is provided inside the moving block 342, and a plurality of connecting columns 351 are connected between the inner walls of the slot 343. The outer ring of one of the connecting columns 351 is provided with a telescopic spring 352, and the two sides of the telescopic spring 352 are respectively connected to one side of the arc-shaped fastening block 35 and the inner wall of the slot 343;

[0055] In order to ensure that the airbag 362 does not cause hard squeezing injury to the calf muscles of each patient during the movement process, taking into account the differences in the calf muscle mass among patients, when the moving block 342 moves in the inclined groove 311 and drives the entire massage mechanism to approach the calf, if it encounters a part with abundant muscle mass, these muscles will naturally come into contact with the airbag 362 and generate thrust, which will act on the arc-shaped fastening block 35 connected to the airbag 362, causing it to slide smoothly along the outer periphery of the connecting column 351, while compressing the built-in telescopic spring 352;

[0056] The telescopic spring 352, as an elastic element, will immediately generate a rebound force after being compressed. This force is transmitted to the airbag 362 through the arc-shaped fastening block 35, ensuring that the airbag 362 can always fit the patient's calf muscles tightly and gently, regardless of the amount of muscle. This design not only ensures the continuity and effectiveness of the massage, but also avoids the discomfort or injury that may be caused by hard squeezing;

[0057] Therefore, by combining the retractable arc-shaped fastening block 35 and the airbag 362, it is possible to flexibly adapt to the calf muscle mass of different patients and achieve a personalized massage experience. Regardless of whether the calf muscles are relatively developed or relatively slender, everyone can enjoy a comfortable and effective massage effect, promote blood circulation, and prevent muscle atrophy.

[0058] like Figure 1 , Figure 2 , Figure 8 , Fig. 9As shown, a rolling assembly 40 is connected to one side of the arc-shaped fastening block 35, and the rolling assembly 40 includes a gear plate 43 fixedly mounted on the surface of the placement plate 25 and a mounting plate 41 mounted on one side of the hose 361. A connecting rod 42 is detachably mounted on one side of the arc-shaped fastening block 35, and a gear 45 is rotatably connected to the outer periphery of the connecting rod 42. The mounting plate 41 and the gear 45 are connected through a pulley 44, and the gear 45 is meshed with the gear plate 43. Moving grooves 431 are formed on both sides of the gear plate 43 to prevent the extension rod 341 from sliding.

[0059] In order to further enhance the massage experience of the patient's calf muscles and meet the diverse massage needs, we specially designed a detachable connecting rod 42, which makes the massage method more flexible and varied. When the special effect of rolling massage is required, the patient can install the connecting rod 42 on the arc-shaped fastening block 35 to complete the preliminary preparation;

[0060] As the moving block 342 continues to move in the inclined slot 311, the transmission mechanism connected thereto is activated. Specifically, the gear 45 begins to rotate under the precise guidance of the gear plate 43. This rotational power is efficiently transmitted through the pulley 44 and finally acts on the mounting plate 41. As a key component, the mounting plate 41 not only firmly connects the hose 361, but also drives it to perform smooth rotational motion inside the two connecting blocks 36.

[0061] The rotation of the hose 361 further drives the inward rotation of the airbag 362, so that the airbag 362 presents a unique rolling state when it contacts the calf muscles. This rolling massage method can not only stimulate the muscle tissue at a deeper level and promote blood circulation, but also bring a completely different comfortable feeling from static massage, thereby achieving a more comprehensive and diversified massage effect and meeting the personalized needs of different patients.

[0062] Working principle: To ensure the safety and effectiveness of rehabilitation exercises, the patient can use the Velcro 26 on both sides of the wheelchair 10 to easily and firmly fix the legs in a suitable position, which is convenient for wearing and provides sufficient support to prevent unnecessary movement of the legs. Then, the closed cover 363 is opened and the airbag 362 is inflated through the hose 361 to expand it and fit the calf tightly, providing assistance and protection for knee rehabilitation;

[0063] The electric push rod 23 on the wheelchair 10 is started, and the electric push rod 23 extends smoothly to drive the second rotating block 242 and the second fixed block 24, and pushes the placement plate 25 to rotate and lift around the positioning column 211. At the same time, the first rotating block 222 rotates synchronously to ensure a smooth lifting process. This process gently stretches the knee joint and promotes functional recovery.

[0064] When the placement plate 25 is lifted, the welding block 32 and the rotating column 321 are driven to move along the groove path of the tensioning roller 331 by pulling the wire 322, triggering the slider 34 to slide in the straight groove 31, and the slider 34 is linked to the moving block 342 to move obliquely along the V-shaped path of the oblique groove 311 and separate, simulating the natural curve of the calf, so that the airbag 362 tightly wraps the calf, achieving deep massage, relaxing muscles, promoting blood circulation, and improving rehabilitation comfort and health benefits.

[0065] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A knee flexion auxiliary device for knee joint rehabilitation, comprising a wheelchair (10), the wheelchair (10) comprising a connecting plate (11) and an avoidance opening (111) opened on the surface of the connecting plate (11), characterized in that: Also includes: A rehabilitation component (20) mounted on the top of the connecting plate (11), and a pulling component (30) mounted on the surface of the rehabilitation component (20); The rehabilitation component (20) comprises a (21) fixedly mounted on the top of the connecting plate (11), both sides of (21) are fixedly connected with positioning columns (211), and the outer periphery of the positioning columns (211) is rotatably connected with a placement plate (25), the top of the placement plate (25) is connected with a Velcro (26), the top of the connecting plate (11) is fixedly connected with a first fixed block (22), the inner walls of the first fixed block (22) are connected by a first fixed column (221), the outer periphery of the first fixed column (221) is rotatably connected with a first rotating block (222), the bottom of the placement plate (25) is fixedly connected with a second fixed block (24), the inner walls of the second fixed block (24) are fixedly connected with a second fixed column (241), the outer periphery of the second fixed column (241) is rotatably connected with a second rotating block (242), and an electric push rod (23) is connected between the second rotating block (242) and the first rotating block (222); The pulling assembly (30) comprises a linear groove (31) and an oblique groove (311) formed on the surface of the placement plate (25); massage pieces are slidably connected inside the linear groove (31) and the oblique groove (311); and the bottom of the placement plate (25) and the massage piece are connected via a pulling piece; As the electric push rod (23) is lifted, the placement plate (25) is driven to rotate with the positioning column (211) as the center of the circle, thereby completing the knee flexion movement of the knee joint. Moreover, as the placement plate (25) is lifted, the pulling member at the bottom pulls the massage member to slide in the linear groove (31) and the oblique groove (311), thereby squeezing and massaging the calf muscles while completing the auxiliary knee flexion movement.

2. A knee flexion auxiliary device for knee joint rehabilitation according to claim 1, characterized in that: The inclined grooves (311) are opened on both sides of the linear groove (31), and the two inclined grooves (311) are arranged in a V shape.

3. A knee flexion auxiliary device for knee joint rehabilitation according to claim 2, characterized in that: The massage part comprises a slider (34) slidably connected inside the linear groove (31) and a moving block (342) slidably connected inside the inclined groove (311); extension rods (341) are fixedly connected to both sides of the slider (34); the extension rods (341) and the moving block (342) are slidably connected; an arc-shaped fastening block (35) is slidably connected to the top of the moving block (342); the inner ring of the arc-shaped fastening block (35) is fixedly connected to two connecting blocks (36); the interiors of the two connecting blocks (36) are movably connected via a hose (361); the outer ring of the hose (361) is connected to an air bag (362); and a closing cover (363) is installed on one side of the hose (361).

4. A knee flexion auxiliary device for knee joint rehabilitation according to claim 3, characterized in that: The movable block (342) is provided with a slot (343) inside, and a plurality of connecting columns (351) are connected between the inner walls of the slot (343). The outer ring of one of the connecting columns (351) is provided with a telescopic spring (352), and the two sides of the telescopic spring (352) are respectively connected to one side of the arc-shaped fastening block (35) and the inner wall of the slot (343).

5. The knee flexion auxiliary device for knee joint rehabilitation according to claim 1, characterized in that: The pulling member comprises a welding block (32) fixedly mounted on the bottom of the placement plate (25); the inner wall of the welding block (32) is rotatably connected to a rotating column (321); the rotating column (321) and the slider (34) are connected via a pulling line (322), and the pulling line (322) is tightened via a tightening member.

6. A knee flexion auxiliary device for knee joint rehabilitation according to claim 5, characterized in that: The tensioning member comprises a plurality of support blocks (33) connected to the top and bottom of the connecting plate (11), a tensioning roller (331) is connected between the inner walls of every two support blocks (33), and a groove for placing a pulling line (322) is provided at the center of the tensioning roller (331).

7. A knee flexion auxiliary device for knee joint rehabilitation according to claim 3, characterized in that: A rolling assembly (40) is connected to one side of the arc-shaped fastening block (35), and the rolling assembly (40) comprises a gear plate (43) fixedly mounted on the surface of the placement plate (25) and a mounting plate (41) mounted on one side of the hose (361). A connecting rod (42) is detachably mounted on one side of the arc-shaped fastening block (35), and a gear (45) is rotatably connected to the outer periphery of the connecting rod (42). The mounting plate (41) and the gear (45) are connected via a pulley (44), and the gear (45) is meshingly connected to the gear plate (43).

8. A knee flexion auxiliary device for knee joint rehabilitation according to claim 7, characterized in that: Both sides of the gear plate (43) are penetrated by movable grooves (431) for allowing the extension rod (341) to slide.

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