Joint rehabilitation apparatus used after total knee arthroplasty

Abstract

The invention relates to the technical field of knee joint rehabilitation apparatuses, and provides a joint rehabilitation apparatus after total knee replacement, aiming at solving the technical problems that the temperature of a compress bag cannot be adaptively adjusted according to the knee swelling degree of a patient by an existing ice compress device, and tiptoes of the patient cannot be trained while ice compress is performed on the patient. Comprising a base and a compress bag structure symmetrically arranged above the base, and further comprises a circulating temperature adjusting structure located between the base and the compress bag structure and used for adjusting the temperature of liquid in a compress bag; the pressure adjusting structure is located below the application bag structure, connected with the application bag structure and used for adjusting the water pressure in the application bag structure; and the tiptoe training structure is positioned above the base and is communicated with the circulating temperature adjusting structure. The temperature of the compress bag can be adaptively adjusted according to the knee swelling degree of a patient, tiptoes of the patient can be trained while ice compress is conducted on the patient, and more comprehensive and better rehabilitation training can be conducted on the patient.

Description

Technical Field

[0001] This invention relates to the field of knee joint rehabilitation equipment technology, and in particular to a joint rehabilitation equipment for patients after total knee replacement surgery. Background Technology

[0002] With the accelerating aging of the population, the incidence of diseases such as knee osteoarthritis and rheumatoid arthritis is increasing year by year. Total knee arthroplasty (TKA), as an effective treatment for end-stage knee joint diseases, is seeing a continuous increase in surgical volume. However, postoperative leg swelling is one of the most common complications after total knee arthroplasty. Surgical trauma leads to local blood vessel rupture and bleeding, tissue fluid leakage, and the release of inflammatory mediators caused by surgical stress further aggravates the swelling. Swelling not only causes pain but also restricts joint movement, affects lower limb blood circulation, and increases the risk of deep vein thrombosis.

[0003] In addition, postoperative pain and inflammation are also key factors affecting rehabilitation outcomes. Traditional hot and cold therapy methods, such as using ice packs or hot towels, suffer from problems such as imprecise temperature control and inconvenience, making it difficult to achieve ideal therapeutic effects. Regarding promoting joint mobility, patients often find it difficult to actively perform joint movement exercises such as toe extension due to postoperative pain and weakened muscle strength. Passive joint movement is crucial for preventing joint adhesions and restoring joint range of motion, but currently, there is a lack of targeted and easy-to-use assistive devices.

[0004] Chinese patent application CN 120022127 A discloses a replaceable orthopedic knee joint rehabilitation ice pack device, including a fixed box and a display screen; it also includes an adjustment component and an ice pack component. The fixed box has an adjustment component slidably connected inside for adjusting the ice pack device. The adjustment component is equipped with the ice pack component, which includes a sliding groove located in the middle of the front and rear side walls of the fixed box. Two sets of upright plates are slidably connected to the opposite side of the sliding groove. A pulley with a self-locking structure is slidably connected inside the sliding groove, and the pulley is mounted on the side wall of the upright plate. A display screen is mounted on the left side wall of the fixed box. This invention allows for adjustment of the position of the ice pack device when the upright plate slides within the sliding groove, thereby adjusting it according to the patient's specific needs and comfort, reducing discomfort caused by improper positioning, and meeting the usage needs of different patients or different parts of the same patient, thus improving its flexibility.

[0005] However, the application only includes an ice pack device, which can only apply ice to the patient. It cannot adjust the temperature of the pack according to the degree of swelling in the patient's knee, nor can it train the patient's toes while applying ice. This makes the ice pack device of the application relatively simple in function and unable to provide better rehabilitation training for the patient. Summary of the Invention

[0006] To address the aforementioned problems, this invention aims to provide a joint rehabilitation device after total knee replacement surgery. This device can adaptively adjust the temperature of the dressing according to the degree of knee swelling and can also train the patient's toes while applying ice, enabling more comprehensive and better rehabilitation training.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A joint rehabilitation device for total knee replacement surgery includes a base and symmetrically arranged dressing structures above the base, characterized in that it further includes: A circulating temperature control structure, located between the base and the dressing structure, is used to regulate the temperature of the liquid in the dressing structure; The pressure regulating structure is located below the dressing structure and is connected to the dressing structure. It is used to regulate the pressure in the dressing structure. The toe training structure is located above the base and is connected to the circulating temperature control structure.

[0008] Furthermore, the circulating temperature control structure includes: The temperature control components are stored inside the base and connected to the outside. The circulating transmission component is connected at one end to the storage and temperature control component, and at the other end to the dressing structure and the storage and temperature control component.

[0009] Furthermore, the storage temperature control component includes: A slot is created inside the base and connects to the outside. Temperature control components are laid at the bottom of the slot.

[0010] Furthermore, the cyclic transmission component includes: The transmission tube assembly has one end located inside the slot and the other end connected to the dressing structure; The circulation tube assembly is connected to the dressing bag structure at one end and located inside the slot at the other end.

[0011] Furthermore, the dressing structure includes: Two support bases are symmetrically positioned above the base; Two dressing bags are symmetrically positioned above two support bases and connected to the two support bases respectively.

[0012] Furthermore, the voltage regulating structure includes: Two pressure regulating components are symmetrically located on the left and right sides of the dressing structure; The connecting pipe is connected to two pressure regulating components at both ends.

[0013] Furthermore, each of the pressure regulating components includes: A belt, connected to the outside of the dressing, is used to adjust the distance between the dressing and the support base; The placement tube is located on one side of the belt, with one end connected to the belt sleeve and the other end connected to the connecting tube. The roller component is fitted into the placement tube and is located below the belt, in contact with the belt; The adjusting block is located below the roller assembly and is connected to the roller assembly; The injection tube is located below the belt, with one end connected to the placement tube and the other end connected to the support base.

[0014] Furthermore, the toe training structure includes: Two placement slots are symmetrically opened above the base and located on one side of the support; The toe plate is located above the two placement slots; The pressure plate adjustment component is located above the toe pressure plate, with one end connected to the toe pressure plate and the other end connected to the circulation transmission component.

[0015] Furthermore, the pressure plate adjusting component includes: The actuating component is located inside the base and passes through the connecting tube; The adjusting fitting is connected at one end to the pushing component and at the other end to the foot pressure plate.

[0016] Furthermore, the actuating component includes: Two cavities are symmetrically installed at both ends of the connecting pipe, with one end of each cavity closed and the other end connected to the regulating pipe. Two racks are respectively located inside the two cavities; The rotating component is located below the two cavities, and its two ends are respectively engaged with the two racks.

[0017] Compared with the prior art, the beneficial effects of the present invention are: Through the coordinated operation of structures such as slots, baffles, semiconductor material plates, dressing bags, support seats, arc-shaped plates, placement tubes, rolling shafts, pull ropes, adjusting blocks, first fixing rods, second fixing rods, and belts, the water injected into the slots can be heated or cooled. The distance between the dressing bag and the support seat can be adjusted by the belt, thereby judging the degree of leg swelling of postoperative patients and automatically switching between cold and hot compress modes for the swollen areas of the patient's legs. It also allows the water injected into the slots to be recycled after applying cold or hot compresses to the patient, preventing waste. Through the coordinated operation of the transmission tube, circulation tube, connecting tube, extension tube, cavity, horizontal tube, L-shaped connecting tube, belt, gear, rack, heel placement groove, toe pressure plate, spring number one, and spring number two, while applying cold or hot compresses to the patient's knee, the water in the transmission tube applies pressure to the toe pressure plate, causing the heel placement groove to retract and compress the spring number one connected to the heel placement groove, simulating the toe-extending action, thus training the patient to extend their toes and promoting recovery. By combining the dressing, support base, curved plate, folding plate, and electric telescopic rod, the leg can be trained to flex and lift the knee, promoting better recovery for patients after total knee replacement surgery. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0019] Figure 2 This is a top view of the overall structure of Embodiment 1 of the present invention.

[0020] Figure 3 For the present invention Figure 2 A sectional view along the AA direction.

[0021] Figure 4 This is a top view of the overall structure of Embodiment 1 of the present invention.

[0022] Figure 5 For the present invention Figure 4 BB-direction sectional view.

[0023] Figure 6 For the present invention Figure 4 CC-direction sectional view.

[0024] Figure 7 This is a side view of the overall structure in Embodiment 1 of the present invention.

[0025] Figure 8 For the present invention Figure 7 A sectional view along the AA direction.

[0026] Figure 9 For the present invention Figure 7 BB-direction sectional view.

[0027] Figure 10 For the present invention Figure 7 A dynamic BB-direction sectional view.

[0028] Figure 11 This is a schematic diagram of the overall structure in Embodiment 2 of the present invention.

[0029] Figure 12 This is a top view of the overall structure in Embodiment 2 of the present invention.

[0030] Figure 13 For the present invention Figure 12 A sectional view along the AA direction.

[0031] Figure 14 For the present invention Figure 12 A dynamic AA-direction sectional view.

[0032] The components are as follows: 1. Base, 2. Slot, 3. Baffle, 4. Injection channel, 5. Dressing bag, 6. Support seat, 7. Arc plate, 8. Placement tube, 9. Water pump, 10. Transmission tube, 11. Circulation tube, 12. Connecting tube, 13. Extension tube, 14. Cavity, 15. Horizontal tube, 16. L-shaped connecting tube, 17. Belt, 18. Gear, 19. Rack, 20. Injection tube, 21. Rolling shaft, 22. Pull rope, 23. Adjusting block, 24. Fixed rod No. 1, 25. Fixed rod No. 2, 26. Heel placement slot, 27. Toe pressure plate, 28. Spring No. 1, 29. Spring No. 2, 30. Folding plate, 31. Electric telescopic rod, 32. Handwheel. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] With the accelerating aging of the population, the incidence of diseases such as knee osteoarthritis and rheumatoid arthritis is increasing year by year. Total knee arthroplasty (TKA), as an effective treatment for end-stage knee joint diseases, is seeing a continuous increase in surgical volume. However, TKA is often accompanied by a series of problems, seriously affecting patients' rehabilitation process and quality of life. Based on this, this application assesses the degree of leg swelling after surgery and provides switching between cold and hot compresses for the swollen areas. Passive toe extension exercises can be manually performed with controllable intensity and duration, better meeting the needs of each patient. In addition, passive knee flexion and leg elevation exercises are provided to facilitate better leg recovery. Please refer to [link / reference] for details. Figures 1-14 This application discloses a joint rehabilitation device after total knee replacement surgery, including a base 1 and a dressing structure symmetrically arranged above the base. It also includes: a circulating temperature regulating structure located between the base 1 and the dressing structure for regulating the temperature of the liquid in the dressing; a pressure regulating structure located below the dressing structure and connected to the dressing structure for regulating the water pressure in the dressing structure; and a toe training structure located above the base 1 and connected to the circulating temperature regulating structure.

[0035] It should be noted that, as Figure 1As shown, the base 1 in this application is the bed board of a hard-bottomed bed. Baffles 3 are integrally formed at both ends of the bed board. Specifically, the bed board and the baffles 3 can be made of solid wood, stainless steel, or other materials.

[0036] The circulating temperature control structure includes: a storage temperature control component, which is located inside the base 1 and connected to the outside; and a circulating transmission component, one end of which is connected to the storage component, and the other end of which is connected to the dressing structure and the storage component.

[0037] Specifically, the temperature-regulating storage component includes: a slot 2, which is located inside the base 1 corresponding to the patient's back when lying down, and is connected to the outside through an injection channel 4 in a baffle 3 at one end near the back. The injection channel 4 is connected to the slot 2, and water or other liquids are injected into the slot 2 for subsequent ice or hot compresses. In this application, water will be used as an example for the following description. In order to facilitate the adjustment of the temperature of the water injected into the slot 2 so that the water temperature is suitable for cold or hot compresses to the patient, a temperature-regulating component is also provided, which is laid at the bottom of the slot 2.

[0038] It should be noted that the temperature control component is specifically a semiconductor material plate laid at the bottom of the slot 2, which can heat and cool water. Preferably, the inner wall around the slot 2 is covered with heat insulation material to prevent heat loss and heat impact on adjacent components.

[0039] The principle of heating or cooling semiconductor materials is mainly based on the Peltier effect and the Seebeck effect. These two effects enable the semiconductor material to transfer heat when an electric current is applied, thereby achieving the effect of heating or cooling.

[0040] The Peltier effect is the basis for heating or cooling semiconductor materials. When direct current passes through a thermocouple composed of P-type and N-type semiconductor materials, the energy level difference of charge carriers (electrons or holes) in the materials causes heat absorption and release at the two ends of the thermocouple, respectively. Specifically, the junction where current flows from the N-type element to the P-type element absorbs heat, forming a cold junction; while the junction where current flows from the P-type element to the N-type element releases heat, becoming a hot junction. By adjusting the current intensity and changing the type and amount of semiconductor material, the magnitude of heat absorption and release can be controlled, thereby achieving precise temperature control.

[0041] The Seebeck effect describes the phenomenon of a potential difference between two metals at different temperatures. While this effect is not as direct in applications to semiconductor materials as the Peltier effect, it explains the fundamental principle of thermoelectricity. In semiconductor materials, when a temperature difference exists between two ends, an electromotive force is generated, thus converting heat energy into electrical energy. In semiconductor refrigeration technology, this effect is primarily used for power generation, rather than for direct cooling or heating.

[0042] In other words, by controlling the direction of the current, the semiconductor material can release heat at the cold end, thus achieving a heating effect; conversely, by changing the direction of the current, the cold end can absorb heat, achieving a cooling effect. This allows the water injected into the slot 2 to be heated or cooled by the semiconductor material plate laid at the bottom of the slot 2, enabling the heated or cooled water to be injected into the dressing bag 5 for applying cold or hot compresses to the patient's knee.

[0043] In order to enable the water injected into the groove 2 to be recycled after applying cold or hot compresses to the patient and to avoid waste, this application also includes a circulation transmission component. Specifically, the circulation transmission component includes: a transmission tube assembly, one end of which is located inside the groove 2 and the other end of which is connected to the dressing bag structure; and a circulation tube assembly, one end of which is connected to the dressing bag structure and the other end of which is located inside the groove 2.

[0044] The transmission pipe assembly includes a water pump 9 located inside the slot, a transmission pipe 10 connected at one end to the output end of the water pump 9 and at the other end to the bag structure. The circulation pipe assembly includes two symmetrically arranged circulation pipes 11 on the left and right sides of the transmission pipe assembly. One end of each circulation pipe 11 is connected to the bottom of the dressing structure, and the other end faces the inside of the slot 2. It should be noted that the diameter of the circulation pipe 11 is smaller than that of the transmission pipe 10. When the water pump 9 draws water from the slot 2 into the dressing structure through the transmission pipe 10 for cold or hot compress, a portion of the water will then enter the slot 2 through the circulation pipe 11, forming a circulation. This can prevent heat loss and keep the water in the dressing 5 at a constant temperature. However, since the diameter of the circulation pipe 11 is smaller than that of the transmission pipe 10, the amount of water entering is always greater than the amount of water leaving, so the dressing structure will not run out of water.

[0045] Specifically, the dressing structure includes: two support seats 6, symmetrically arranged above the base 1; and two dressing bags 5, symmetrically arranged above the two support seats 6, and respectively connected to the two support seats 6. Each support seat 6 is movably connected to the dressing bag 5 through a pressure adjusting structure, which facilitates adjusting the distance between the two according to the size of the knee between the dressing bag 5 and the support seat 6.

[0046] Specifically, the pressure regulating structure includes: two pressure regulating components, symmetrically arranged on the left and right sides of the dressing structure; and a connecting pipe 12, with both ends connected to the two pressure regulating components respectively.

[0047] Each pressure adjustment component includes: a belt 17 connected to the outside of the dressing bag 5 for adjusting the inner diameter of the dressing bag 5 and the support seat 6; a placement tube 8 located on one side of the belt 17, with one end connected to the belt 17 and the other end connected to the connecting tube 12; a roller sleeved in the placement tube 8 and located below the belt 17, in contact with the belt 17; and an adjustment block 23 located below the roller and connected to the roller via a pull rope 22.

[0048] Specifically, the roller assembly includes a roller shaft 21 and a handwheel 32 fixedly connected to the roller shaft 21. A first fixing rod 24 is also fixedly installed on the outer wall of the placement tube 8 to fix the belt 17 after adjusting the size of the dressing bag 5 and the support seat 6. A second fixing rod 25 is installed on the outer wall of the support seat 6 to fix the belt 17, facilitating leg movement for the patient. To facilitate adaptive cold or hot compresses on knees with varying degrees of swelling, this application also provides openings on the side of both placement tubes 8 facing the support seat 6. An injection tube 20 is fitted into each opening, located below the belt 17, with one end connected to the placement tube 8 and the other end connected to the support seat 6.

[0049] When applying cold or hot compresses to the knee, pulling the exposed end of the belt 17 tightens the compress bag 5 threaded through the support seat 6 until it fits against the patient's knee. As the belt 17 is pulled outwards, it contacts the rolling shaft 21. Due to friction, the rolling shaft 21 rotates as the belt 17 moves. The adjusting block 23 is connected to the rolling shaft 21 via a pull rope 22. As the rolling shaft 21 rotates, the pull rope 22 extends, causing the adjusting block 23, which is fixedly connected to one end of the pull rope 22, to descend. A swollen knee results in a shorter extension of the belt 17 and a shorter movement distance for the adjusting block 23. The adjustment block 23 on the leg side moves a greater distance. After adjusting the distance between the support base 6 and the dressing bag 5, the belt 17 is fixed by fitting the opening on the first fixing rod 24. The adjustment block 23 that moves a greater distance will block the opening or be located below the opening, preventing water in the placement tube 8 from entering the support base 6. The adjustment block 23 that moves a shorter distance will expose the opening, allowing water pumped into the placement tube 8 to flow through the opening into the support base 6 and then into the dressing bag 5, thus providing cold or hot compresses to the swollen knee. When both legs are not swollen, the adjustment blocks 23 are balanced on both sides and located below the opening, preventing water from entering the support base 6 and the dressing bag 5.

[0050] It should be noted that the adjusting block 23 is a lead block whose outer diameter matches the inner diameter of the placement pipe 8, so that water cannot overflow into other places through the lead block.

[0051] Postoperative pain and weakened muscle strength make it difficult for patients to actively perform joint exercises such as toe extension. Passive joint movements are crucial for preventing joint adhesions and restoring joint mobility. Therefore, in order to promote patient recovery by performing toe extension exercises while applying cold or hot compresses to the patient's knee, this application also includes a toe extension training structure.

[0052] Specifically, the toe training structure includes: two placement slots symmetrically located above the base 1 and on one side of the support 6; each placement slot has a heel placement slot 26, which is connected to the placement slot by a spring 28; a toe pressure plate 27 located above the two placement slots; and a pressure plate adjustment component located above the toe pressure plate 27, with one end connected to the toe pressure plate 27 and the other end connected to the circulation transmission component.

[0053] To improve patient comfort, this application also includes an air cushion in each heel placement slot 26.

[0054] The pressure plate adjustment component includes: a pushing assembly located inside the base 1 and passing through the connecting pipe 12; and an adjustment pipe, one end of which is sleeved and connected to the pushing assembly, and the other end of which is sleeved and connected to the toe pressure plate 27.

[0055] It should be noted that a second spring 29 is provided at the part where the push component is connected to the toe pressure plate 27, which is used to automatically reset the toe pressure plate 29 after use.

[0056] The pushing assembly includes: two cavities 14 symmetrically arranged at both ends of the connecting pipe 12, with one end of each cavity 14 closed and the other end connected to the regulating pipe; two racks 19 respectively disposed inside the two cavities 14; and two rotating members respectively located below the two cavities 14, with their ends respectively meshing with the two racks 19.

[0057] It should be noted that each rotating component includes a gear 18 that meshes with the rack 19, and a handle connected to the gear 18. By manually turning the handle, the gear 18 is driven to rotate, which in turn drives the rack 19 to move. The end of the rack 19 facing the adjusting tube is provided with a piston.

[0058] The regulating pipe includes an extension pipe 13, which is connected to the connecting pipe 12 and is on the same straight line as the transmission pipe 10; a horizontal pipe 15, which is perpendicularly connected to the extension pipe 13; two L-shaped connecting pipes 16, which are symmetrically arranged at both ends of the horizontal pipe 15 and are respectively connected to the two cavities 14; a confluence pipe, which is located at the top of the two L-shaped connecting pipes 16, with one end connected to the two L-shaped connecting pipes 16 and the other end connected to the foot pressure plate 27; and a valve is also provided between the extension pipe 13 and the connecting pipe 12.

[0059] When foot training is not required, the valve can be closed, and only cold or hot compresses can be applied to the knee. When foot training is required, the patient's heel can be placed on the corresponding heel placement slot 26, and then the valve can be opened to allow water to flow through the transmission pipe 10 and connecting pipe 12 into the extension pipe 13, and then flow into the two cavities 14 on both sides of the extension pipe 13. Then, the handle can be manually turned to drive the gear 18 to rotate, which in turn drives the rack 19 to move. The movement of the rack 19 can drive the piston to move, which in turn causes the piston to squeeze the water in the L-shaped connecting pipe 16 into the confluence pipe. When the water in the confluence pipe is combined and moves downward, since water is incompressible, the force of the water will push the toe pressure plate 27 downward to press the toes, which will cause the heel placement slot 26 to be pushed backward, compressing the first spring 28 connected to the heel placement slot 26, simulating the toe extension action. It should be noted that the upward or downward distance of the toe plate 27 can be controlled by manually controlling the direction and distance of the rack 19. When the toe plate 27 moves upward, the heel placement groove 26 is reset under the action of the first spring 28, and the foot returns to the initial position. This process is repeated to control the passive training of the foot.

[0060] To promote better rehabilitation for patients after total knee replacement surgery, this application also includes a leg training structure that can drive the leg to complete knee flexion and leg lifting training. Specifically, the leg training structure includes two flexion and extension components, both of which are movably connected to the support seat 6 via pins, and the whole is an arc-shaped plate 7 that is adapted to the curvature of the leg. Two leg-lifting assemblies are located at the bottom of the support base 6 and connected to the bottom of the support base 6 via a movable shaft. Each leg-lifting assembly includes: a strip groove formed on the base 1; an electric telescopic rod 31 fixedly disposed at one end of the strip groove; and a folding plate 30, one end of which is connected to the movable end of the electric telescopic rod 31, and the other end of which is connected to the bottom of the support base 6 via a movable shaft.

[0061] In use, the electric telescopic rod 31 is extended by an external power source, pushing the folding plate 30 to fold forward and upward. This causes the folding plate 30 to push the support seat 6 to rotate upward about the injection tube 20 as the rotation axis. Since the arc plate 7 is movably connected to the support seat 6 by a pin, the arc plate 7 can rotate downward under the action of gravity while the support seat 6 rotates upward, thus enabling the leg to complete the knee flexion action. When the electric telescopic rod 31 is shortened, it can push the support seat 6 and the arc plate 7 back to the horizontal position under the action of gravity. If only leg-raising exercises are required, lock the pin to fix the support seat 6 and the arc plate 7 in a straight line. Then activate the electric telescopic rod 31 to extend it, which in turn causes the folding plate 302 to push the support seat 6 upward to complete the leg-raising action. The operation method to restore the horizontal state is the same as the operation method for the knee-bending action, and will not be described in detail here. Example 1

[0062] TKA surgery is often accompanied by a series of problems, seriously affecting the patient's recovery process and quality of life. Based on this, this application assesses the degree of leg swelling after surgery and switches between cold and hot compresses for the swollen areas. Simultaneously, passive toe-extending exercises can be manually performed. During use, pulling the exposed end of the belt 17 tightens the dressing bag 5 threaded through the support seat 6 until it conforms to the patient's knee. As the belt 17 is pulled outwards, it contacts the rolling shaft 21, and the friction causes the rolling shaft 21 to rotate. The adjusting block 23 is connected to the rolling shaft 21 via a pull rope 22. When the rolling shaft 21 rotates, the pull rope 22 extends, causing the adjusting block 23, which is fixedly connected to one end of the pull rope 22, to descend. A swollen knee will cause the belt 17 to extend to a shorter length, resulting in a shorter movement distance for the adjusting block 23. On the normal leg side, the adjusting block 23 will move a greater distance. After adjusting the distance between the support base 6 and the dressing bag 5, the belt 17 is fixed by fitting the opening on the first fixing rod 24. The adjusting block 23 that moves a greater distance will block the opening or be located below the opening, preventing water in the placement tube 8 from entering the support base 6. The adjusting block 23 that moves a shorter distance will expose the opening, allowing water pumped into the placement tube 8 to flow through the opening into the support base 6 and then into the dressing bag 5, thus providing cold or hot compresses to the swollen knee. When both legs are not swollen, the adjusting blocks 23 are balanced on both sides and located below the opening, preventing water from entering the support base 6 and the dressing bag 5.

[0063] Post-operative pain and weakened muscle strength make it difficult for patients to actively perform joint exercises such as toe extension. Passive joint movements are crucial for preventing joint adhesions and restoring joint mobility. When foot training is needed, the patient's heel is placed in the corresponding heel placement slot 26. The valve is then opened, allowing water to flow through the transmission pipe 10 and connecting pipe 12 into the extension pipe 13, and then into the two cavities 14 on either side of the extension pipe 13. The handle is then manually turned, causing the gear 18 to rotate, which in turn moves the rack 19. The movement of the rack 19 moves the piston, which in turn squeezes the water in the L-shaped connecting pipe 16 into the confluence pipe. When the water in the confluence pipe merges and moves downwards, the incompressible water force pushes the toe pressure plate 27 downwards, causing the heel placement slot 26 to retract and compress the first spring 28 connected to the heel placement slot 26, simulating the toe extension action. Example 2

[0064] Based on Example 1, this application can also assist the patient's leg in completing knee flexion and leg raising exercises, thus improving the patient's rehabilitation. In use, an external power source controls the extension of the electric telescopic rod 31, pushing the folding plate 30 to fold forward and upward. This causes the folding plate 30 to push the support seat 6 to rotate upward around the injection tube 20 as the rotation axis. Since the arc-shaped plate 7 is movably connected to the support seat 6 via a pin, while the support seat 6 rotates upward, the arc-shaped plate 7 can rotate downward under gravity, thereby enabling the leg to complete the knee flexion action. When the electric telescopic rod 31 shortens, it can push the support seat 6 and the arc-shaped plate 7 back to the horizontal position under gravity. If only leg-raising exercises are required, lock the pin to fix the support seat 6 and the arc plate 7 in a straight line. Then activate the electric telescopic rod 31 to extend it, which in turn causes the folding plate 302 to push the support seat 6 upward to complete the leg-raising action. The operation method to restore the horizontal state is the same as the operation method for the knee-bending action, and will not be described in detail here.

[0065] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A joint rehabilitation device after total knee arthroplasty, comprising a base (1) and a dressing structure symmetrically disposed above the base (1), characterized in that, Also includes: A circulating temperature control structure is located between the base (1) and the dressing structure, and is used to regulate the temperature of the liquid in the dressing structure; The pressure regulating structure is located below the dressing structure and is connected to the dressing structure. It is used to regulate the pressure in the dressing structure. The toe training structure is located above the base (1) and is connected to the circulating temperature control structure.

2. The joint rehabilitation device after total knee arthroplasty according to claim 1, characterized in that, The circulating temperature control structure includes: The temperature control component is stored inside the base (1) and connected to the outside. The circulating transmission component is connected at one end to the storage and temperature control component, and at the other end to the dressing structure and the storage and temperature control component.

3. The joint rehabilitation device after total knee arthroplasty according to claim 2, characterized in that, The storage temperature control component includes: A slot (2) is formed inside the base (1) and is connected to the outside. Temperature control components are laid at the bottom of the slot (2).

4. The joint rehabilitation device after total knee arthroplasty according to claim 3, characterized in that, The cyclic transmission component includes: The transmission tube assembly has one end located inside the slot (2) and the other end connected to the bag structure; The circulation tube assembly is connected to the bag structure at one end and located inside the slot (2) at the other end.

5. A joint rehabilitation device for total knee arthroplasty according to claim 4, characterized in that, The dressing structure includes: Two support bases (6) are symmetrically arranged above the base (1); Two dressing bags (5) are symmetrically positioned above two support seats (6) and connected to the two support seats (6) respectively.

6. A joint rehabilitation device for total knee arthroplasty according to claim 5, characterized in that, The voltage regulating structure includes: Two pressure regulating components are symmetrically located on the left and right sides of the dressing structure; The connecting pipe (12) is connected to two pressure regulating components at both ends.

7. A joint rehabilitation device for total knee arthroplasty according to claim 6, characterized in that, Each of the pressure regulating components includes: A belt (17) is connected to the outside of the dressing bag (5) and is used to adjust the distance between the dressing bag (5) and the support seat (6); Placement tube (8) is located on one side of belt (17), with one end connected to belt (17) and the other end connected to connecting tube (12); The roller is fitted into the placement tube (8) and located below the belt (17), in contact with the belt (17); The adjusting block (23) is located below the roller and is connected to the roller; The injection tube (20) is located below the belt (17), with one end connected to the placement tube (8) and the other end connected to the support base (6).

8. A joint rehabilitation device for total knee arthroplasty according to claim 7, characterized in that, The toe training structure includes: Two placement slots are symmetrically opened above the base (1) and located on one side of the support (6); The toe plate (27) is located above the two placement slots; The pressure plate adjustment component is located above the toe pressure plate (27), with one end connected to the toe pressure plate (27) and the other end connected to the circulation transmission component.

9. A joint rehabilitation device for total knee arthroplasty according to claim 8, characterized in that, The pressure plate adjusting component includes: The pushing component is located inside the base (1) and passes through the connecting tube (12); The adjusting pipe is connected at one end to the push assembly and at the other end to the foot pressure plate (27).

10. A joint rehabilitation device after total knee arthroplasty according to claim 9, characterized in that, The actuating component includes: Two cavities (14) are symmetrically installed at both ends of the connecting pipe (12), and one end of each cavity (14) is closed, while the other end is connected to the regulating pipe. Two racks (19) are respectively located inside the two cavities (14); The rotating component is located below the two cavities (14) and its two ends are respectively engaged with the two racks (19).

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