Joint rehabilitation apparatus used after total knee arthroplasty

Abstract

The invention discloses a joint rehabilitation device used after total knee arthroplasty in the technical field of medical instruments. The joint rehabilitation device comprises a bed body. A first carrier is arranged at the bed tail of the bed body; functional grooves are formed in the top of the first carrier; a joint motion range training assembly is arranged in the functional groove; the joint motion range training assembly comprises a base, a lifting mechanism, a rotating carrier and a leg supporting carrier. The base is in sliding fit with the functional groove, the lifting mechanism is used for driving the base to ascend and descend, the rotating carrier is located above the base, and a rotating lifting assembly is arranged between the rotating carrier and the base and used for driving the rotating carrier to ascend, descend and rotate at the same time; the leg supporting carrier is located above the rotating carrier, an adjusting assembly is arranged between the leg supporting carrier and the rotating carrier, and the adjusting assembly is used for adjusting the movement range of the leg supporting carrier; a muscle strength training assembly is arranged on the side, away from the bed head, of the first carrier. According to the scheme, the training requirements of patients in different rehabilitation stages can be met.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and specifically relates to a joint rehabilitation device after total knee arthroplasty. Background Art

[0002] Total Knee Arthroplasty (TKA) is one of the main means for treating severe joint diseases such as knee osteoarthritis. This surgery restores the normal function of the joint by replacing the damaged knee joint surface, thereby alleviating the patient's pain and improving the quality of life. However, the success of the surgery not only depends on the surgery itself, but the postoperative rehabilitation process is equally crucial. Postoperative rehabilitation not only helps patients overcome problems such as limited range of motion of the knee joint and decreased muscle strength caused by long-term illness, but also significantly improves the success rate of the surgery and patient satisfaction.

[0003] There are various rehabilitation devices after total knee arthroplasty on the market. Most of these rehabilitation devices are designed with a single function. During rehabilitation training, they can often only target a specific rehabilitation need for training, such as simple joint flexion and extension activities training. Although such rehabilitation devices can help patients with rehabilitation exercises to a certain extent, they have many defects. First, due to the single function, they cannot meet the diverse rehabilitation needs of patients at different rehabilitation stages. In the early postoperative period, patients may focus more on the restoration of joint range of motion. As the rehabilitation process progresses, the needs for muscle strength training, joint stability training, etc. gradually become prominent. Single-function rehabilitation devices are difficult to achieve comprehensive rehabilitation goals.

[0004] Therefore, there is an urgent need for a joint rehabilitation device after total knee arthroplasty that can overcome the defect of single function in the prior art. Summary of the Invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide a joint rehabilitation device after total knee arthroplasty, which can meet the training needs of patients at different rehabilitation stages.

[0006] In order to achieve the above purpose, the technical solution of the present invention is as follows: A joint rehabilitation device after total knee arthroplasty includes a bed body; a first carrier is provided at the end of the bed body; a function slot is provided at the top of the first carrier; a joint range of motion training component is provided in the function slot; the joint range of motion training component includes a base, a lifting mechanism, a rotating carrier, and a leg support carrier; the base is slidably matched with the function slot, the lifting mechanism is used to drive the base to lift, the rotating carrier is located above the base, a rotating and lifting component is provided between the rotating carrier and the base, and the rotating and lifting component is used to drive the rotating carrier to perform lifting and rotating movements simultaneously; the leg support carrier is located above the rotating carrier, and an adjusting component is provided between the leg support carrier and the rotating carrier, and the adjusting component is used to adjust the range of motion of the leg support carrier; On the side of the first carrier away from the head of the bed, a muscle strength training component is provided.

[0007] The above solution has the following beneficial effects: 1. In this solution, when joint range of motion training is needed for the patient, the leg support carrier is moved out of the function slot through the lifting mechanism, and then the affected limb of the patient is placed on the leg support carrier. The rotating lifting component is used to drive the rotating carrier to perform lifting and rotating movements, thereby driving the leg support carrier to perform rotating and lifting movements. The activity range of the leg support carrier is adjusted through the adjusting component, so as to adjust the training range of the joint range of motion; when muscle training is needed, strength training is carried out through the muscle strength training component at the end of the bed.

[0008] Through the coordinated action of the lifting mechanism, the rotating lifting component and the adjusting component, this solution can accurately control the position, height and activity range of the leg support carrier, so as to meet the diverse training needs of the patient for joint range of motion at different rehabilitation stages.

[0009] 2. In this solution, in addition to joint range of motion training, the rehabilitator is also equipped with a muscle strength training component. This helps to enhance the muscle strength around the patient's knee joint, improve the stability of the joint, and further promote the rehabilitation effect.

[0010] 3. This solution can meet the needs of both joint range of motion training and muscle strength training at the same time, and the patient does not need to frequently change the rehabilitation equipment, thus improving the convenience of rehabilitation training.

[0011] Furthermore, the lifting mechanism includes a lifting slot opened on the side wall of the function slot; a lifting lead screw and a lifting driving member are arranged in the lifting slot, the lifting driving member is used to drive the lifting lead screw to rotate, the lifting lead screw is rotationally matched with the lifting slot, and a lifting nut seat is in threaded cooperation with the lifting lead screw, and the lifting nut seat is fixedly connected with the base.

[0012] Beneficial effect: The rotation of the lifting lead screw is accurately controlled through the lifting driving member (such as a motor, a hydraulic cylinder or a pneumatic device), so as to realize the accurate movement of the lifting nut seat in the lifting slot. This design ensures that the base and the rotating carrier and the leg support carrier above it can be lifted at a predetermined speed and stability.

[0013] Furthermore, the rotating lifting component includes a central column; the central column is located at the center of the base, a piston slot is arranged in the central column, a movable column is slidably matched in the piston slot, the movable column passes through the rotating carrier and is rotationally connected with the rotating carrier; a gear ring is rotationally connected to the outside of the central column, the gear ring meshes with a first gear, a rotating driving member is axially arranged on the first gear, the rotating driving member is used to drive the first gear to rotate, and a connecting rod is rotationally connected to one side of the gear ring; A second chute is provided at the bottom of the rotating carrier. A slider and a compression spring are arranged in the second chute. The slider is in sliding fit with the second chute. Two ends of the compression spring are respectively fixedly connected to the slider and one end of the second chute away from the central column. The slider is rotatably connected to the connecting rod. A closed-curve boss is arranged on the inner wall of the functional groove. The closed-curve boss is higher than the rotating carrier. A convex block is arranged on the side wall of the rotating carrier. The convex block is in sliding fit with the closed-curve boss.

[0014] Beneficial effects: The rotation driving part drives the first gear to rotate. The rotation of the first gear drives the gear ring to rotate. The rotation of the gear ring drives the connecting rod to rotate. The rotation of the connecting rod drives the rotating carrier to rotate. As a result, the convex block slides along the bottom of the closed-curve boss. When the convex block contacts the lowest point of the closed-curve boss, the compression spring is compressed to the shortest. When the convex block contacts the highest point of the closed-curve boss, the compression spring releases potential energy to push the slider towards the central column. Under the combined action of the compression spring and the closed-curve boss, the rotating carrier continuously moves up and down reciprocally.

[0015] Through the simple driving of the rotation driving part, this assembly can simultaneously realize two motion modes of rotation and lifting.

[0016] Further, the adjusting assembly includes a plurality of first bevel gears. The first bevel gears are all axially fixedly connected to the movable column. The first bevel gears are respectively meshed with second bevel gears. The second bevel gears are all axially fixedly connected to cylinders. Helical grooves are symmetrically arranged on the cylinders. The helical grooves communicate with each other in a staggered manner. From high to low of the cylinders, the length of the helical grooves gradually shortens. The rotating carrier is provided with a fixed plate, a first chute and a functional column. The cylinders respectively penetrate through the fixed plate and are rotatably connected to the fixed plate. The top of the functional column is rotatably connected to the leg support carrier. The bottom of the functional column is in sliding fit with the first chute. An adjusting groove is arranged on one side of the functional column close to the cylinder. A second carrier and a moving assembly for moving the second carrier are arranged in the adjusting groove. A groove is arranged on one side of the second carrier close to the cylinder. A first magnetic block is slidably fitted in the groove. A second spring is arranged between the first magnetic block and the groove. When the first magnetic block is inserted into the helical groove, it is in sliding fit with the helical groove. A first electromagnet for generating a magnetic force to adsorb the first magnetic block is arranged in the second carrier.

[0017] Beneficial effects: Principle: When the patient is performing joint range of motion training, place the patient's lower leg on the leg support carrier and activate the rotary drive member. At this time, the running track of the leg support carrier is a spiral centripetal / spiral centrifugal track with undulations, so as to simulate the patient's knee joint bending - rotating hip joint movement, and the whole process conforms to human kinematics. When it is necessary to adjust the knee joint bending angle or hip joint rotation angle of the patient, only need to control the first electromagnet to generate magnetic force to adsorb the first magnetic member, so that the first magnetic member disengages from the spiral groove on one of the cylinders, and then move the first magnetic member to be flush with the spiral groove on the other cylinder through the moving component, and then release the first electromagnet, so that the first magnetic member is inserted into the spiral groove of this cylinder under the action of the second spring. Since the lengths of the spiral grooves on different cylinders are different, the moving range of the leg support carrier is also different (each cylinder corresponds to a spiral track with a different radius size, the longer the spiral groove, the larger the radius of the spiral track, that is, the larger the range of the patient's joint movement).

[0018] In this solution, driven by the rotary drive member, the leg support carrier can move along a spiral centripetal / spiral centrifugal track with undulations. This movement mode not only simulates the bending action of the knee joint, but also combines the rotational movement of the hip joint, making the whole training process more in line with the principle of human kinematics and helping the patient to recover joint function more effectively.

[0019] In this solution, through the design of multiple cylinders and the spiral grooves on them in the adjustment component, the moving range of the leg support carrier can be flexibly adjusted. By controlling the adsorption and release of the first magnetic block by the first electromagnet, it is convenient to switch to spiral grooves of different lengths, thereby changing the movement track radius of the leg support carrier and the range of joint movement. This design not only meets the personalized training needs of different patients, but also can gradually increase the training intensity as the patient's rehabilitation progresses, promoting the gradual recovery of joint function.

[0020] Furthermore, the moving component includes an adjustment drive member and an adjustment lead screw; the adjustment drive member is used to drive the adjustment lead screw to rotate, the adjustment lead screw is rotationally matched with the adjustment groove, and an adjustment nut seat is in threaded cooperation with the adjustment lead screw, and the adjustment nut seat is fixedly connected to the second carrier.

[0021] Beneficial effects: By precisely controlling the rotation of the adjustment lead screw through the adjustment drive member, and then driving the adjustment nut seat to move along a predetermined track in the adjustment groove. This design ensures that the second carrier and the first magnetic block on it can accurately and smoothly switch from the spiral groove of one cylinder to the spiral groove of another cylinder, realizing precise control of the moving range of the leg support carrier.

[0022] Furthermore, an opening and closing mechanism is also provided on the functional slot; the opening and closing mechanism includes a receiving slot opened on the side wall of the functional slot, a rotating cover and an opening and closing driving member are arranged in the receiving slot, the rotating cover is rotatably connected to the receiving slot, and the opening and closing driving member is used to drive the rotating cover to deflect between the functional slot and the receiving slot.

[0023] Beneficial effects: When the rehabilitator is in an idle state, the rotating cover is driven by the opening and closing driving member to rotate into the functional slot, which can effectively cover the functional slot and key components inside it, such as the adjustment component and the rotating lifting component. This can not only prevent external pollutants such as dust and debris from entering the inside of the functional slot, keep the components clean and dry, but also avoid damage caused by accidental touch or impact, thereby extending the service life of the rehabilitator.

[0024] Furthermore, a buffer groove is provided at the top of the convex block, a buffer block is slidably fitted in the buffer groove, and a first spring is arranged between the buffer block and the buffer groove.

[0025] Beneficial effects: When the rotating carrier moves up and down under the combined action of the compression spring and the closing curve convex platform, the buffer block can absorb and disperse part of the impact force, making the lifting process of the rotating carrier smoother and silkier. This not only improves the comfort of training, but also helps to reduce the unnecessary pressure on the patient's joints caused by sudden impact or vibration.

[0026] Long-term impact and vibration may cause wear or damage to the equipment components. The design of the buffer groove and the buffer block effectively reduces this impact and extends the service life of the rotating lifting component and the entire rehabilitator. This not only reduces the maintenance cost, but also improves the reliability and stability of the equipment.

[0027] The design of the buffer block makes the lifting process of the rotating carrier softer and smoother, which improves the patient's use experience to a certain extent.

[0028] Furthermore, a massage mechanism is also provided on the leg support carrier; the massage mechanism includes a plurality of massage grooves, and massage air bags are arranged in each massage groove; a slip ring is also arranged between the leg support carrier and the functional column, the massage air bags are all communicated with the outlet of the slip ring, and the inlet of the slip ring is communicated with a conduit; An air vent pipe is arranged in the movable column, and the air vent pipe is communicated with the conduit and the piston groove respectively.

[0029] Beneficial effects: When the rotating carrier moves up and down, the movable column will continuously reciprocally squeeze the air in the piston groove and squeeze the air into each massage air bag along the air vent pipe - conduit - slip ring. The patient's leg is massaged by the expansion - contraction of the massage air bag. This dynamic massage method can stimulate the muscles and blood vessels of the patient's leg, promote blood circulation, help accelerate the rehabilitation process, and reduce swelling and pain.

[0030] After joint replacement surgery, patients often experience muscle tension and stiffness. The massage function of the massage airbag can help relax the muscles, relieve the tense state, improve the flexibility and range of motion of the muscles, and thus enhance the stability of the joint.

[0031] Since the massage mechanism is automatically driven by the lifting movement of the rotating carrier, the patient can enjoy the massage treatment without additional operation.

[0032] Furthermore, air pressure sensors are provided inside each massage airbag. The air pressure sensors are all electrically connected to a control unit. The control unit is used to judge the pain condition of the patient's joint based on the data collected by each air pressure sensor, and adjust the range of motion of the patient's joint, and obtain the air pressure sensor with abnormal data collection. Abnormal data collection means that the air pressure data is different from the air pressure sensor. If the number of air pressure sensors with abnormal data collection is higher than the preset number, it is judged that the patient's joint is painful, and the range of motion of the patient's joint is reduced. The more the number of air pressure sensors with abnormal data collection, the greater the degree of joint pain of the patient, and the smaller the range of motion of the patient's joint adjusted by the control unit.

[0033] Beneficial effects: By collecting data in real time through the air pressure sensors inside each massage airbag, the control unit can accurately judge the pain condition of the patient's joint. This intelligent monitoring method not only improves the accuracy and timeliness of diagnosis, but also helps medical staff to timely understand the patient's rehabilitation progress and pain condition, so as to formulate a more scientific and reasonable rehabilitation plan.

[0034] According to the data of the air pressure sensor, the control unit can automatically adjust the range of motion of the patient's joint. For patients with a relatively mild degree of joint pain, the range of motion of the joint can be appropriately increased to promote functional recovery; while for patients with a relatively severe degree of joint pain, the range of motion of the joint can be appropriately reduced to avoid further injury. This personalized adjustment method ensures the pertinence and effectiveness of the rehabilitation training.

[0035] Through the intelligent monitoring and adjustment functions, the rehabilitation device can take timely measures when the patient's joint pain intensifies, such as reducing the range of motion of the joint, so as to avoid risks such as excessive joint wear or secondary injury.

[0036] Furthermore, the muscle strength training component includes a collar, a second magnetic block and a second electromagnet; a third sliding groove is also provided on the second carrier. The second magnetic block is slidably matched with the third sliding groove. A traction rope is arranged between the collar and the second magnetic block. The second electromagnet is used to generate a magnetic force to adsorb the second magnetic block.

[0037] Beneficial effects: The patient puts the collar on the affected limb and then raises the straight leg. By adjusting the magnetic force generated by the second electromagnet, the sliding resistance of the second magnetic block in the third sliding groove can be precisely controlled, thereby realizing personalized adjustment training for the patient's muscle strength. This design enables the rehabilitation device to adapt to the muscle strength levels and training needs of different patients, improving the pertinence and effectiveness of training. Description of the Drawings

[0038] Figure 1 This is a three-dimensional structural schematic diagram of a joint rehabilitation device after total knee arthroplasty according to the present invention.

[0039] Figure 2 It is Figure 1 the top view of.

[0040] Figure 3 It is Figure 2 the cross-sectional view taken along the A-A direction in

[0041] Figure 4 It is Figure 2 the cross-sectional view taken along the B-B direction in

[0042] Figure 5 It is Figure 3 the partial enlarged schematic view at M in

[0043] Figure 6 It is Figure 3 the partial enlarged schematic view at N in

[0044] Figure 7 It is Figure 3 the partial enlarged schematic view at O in

[0045] Figure 8 This is a structural schematic diagram of a functional column in a joint rehabilitation device after total knee arthroplasty according to the present invention.

[0046] Figure 9 This is a structural schematic diagram of a cylinder in a joint rehabilitation device after total knee arthroplasty according to the present invention.

[0047] Figure 10 It is Figure 3 the partial enlarged schematic view at P in

[0048] Figure 11 This is a partial enlarged schematic view of a functional groove in a joint rehabilitation device after total knee arthroplasty according to the present invention.

[0049] The reference numerals in the accompanying drawings of the specification include: 1, bed body; 2, first carrier; 3, collar; 201, functional groove; 202, base; 203, central column; 204, gear ring; 205, first gear; 206, rotation driving member; 207, lifting driving member; 208, lifting groove; 209, lifting lead screw; 210, lifting nut seat; 211, functional column; 212, conduit; 213, connecting rod; 214, opening and closing driving member; 215, rotating cover; 216, accommodating groove; 217, leg support carrier; 218, slip ring; 219, movable column; 220, first bevel gear; 221, second bevel gear; 222, fixing plate; 223, first sliding groove; 224, rotating carrier; 225, second sliding groove; 226, compression spring; 227, slider; 228, closed curve boss; 229, convex block; 230, buffer groove; 231, buffer block; 232, first spring; 233, cylinder; 234, helical groove; 235, inclined groove; 236, adjustment driving member; 237, adjustment groove; 238, adjustment lead screw; 239, adjustment nut seat; 240, second carrier; 241, first electromagnet; 242, first magnetic block; 243, second spring; 2031, piston groove; 2032, ventilation duct; 2171, massage airbag; 2172, air pressure sensor; 301, second electromagnet; 302, third sliding groove; 303, second magnetic block. Detailed implementation manners

[0050] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0051] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "lateral", "vertical", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0052] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations.

[0053] The following is a further detailed description through specific embodiments: Embodiment 1 is basically as shown in the appendix Figures 1 - 11 as follows: An articular rehabilitation device after total knee arthroplasty includes a bed body 1; a first carrier 2 is provided at the end of the bed body 1. In this embodiment, the bed body 1 and the first carrier 2 are integrally designed, and the first carrier 2 is specifically located directly below the affected limb when the patient lies flat. A function groove 201 is opened at the top of the first carrier 2. In this embodiment, the cross-section of the function groove 201 is circular; an articular range of motion training component is arranged in the function groove 201; the articular range of motion training component includes a base 202, a lifting mechanism, a rotating carrier 224 and a leg support carrier 217; the base 202 is located at the bottom of the function groove 201, and the base 202 is slidably matched with the function groove 201, and the lifting mechanism is used to drive the base 202 to lift. Specifically, in combination with the appendix Figure 3 and the appendix Figure 10 as shown, the lifting mechanism includes a lifting groove 208 opened on the left side of the bottom of the function groove 201; a lifting lead screw 209 and a lifting driving member 207 are arranged in the lifting groove 208, and the lifting driving member 207 is used to drive the lifting lead screw 209 to rotate. In this embodiment, the lifting driving member 207 is a servo motor, and the servo motor is fixed to the bottom of the lifting groove 208 by bolts. The output shaft of the servo motor and the lifting lead screw 209 are coaxially fixed through a coupling. The top of the lifting lead screw is rotatably matched with the lifting groove 208. A lifting nut seat 210 is in threaded cooperation with the lifting lead screw 209, and the lifting nut seat 210 is welded and fixed to the base 202.

[0054] The rotating carrier 224 is located above the base 202, and a rotating and lifting component is arranged between the rotating carrier 224 and the base 202. The rotating and lifting component is used to drive the rotating carrier 224 to perform lifting and rotating movements simultaneously; specifically, in combination with the appendix Figure 3 , the appendix Figure 6 and the appendix Figure 7 as shown, the rotating and lifting component includes a central column 203; the central column 203 is welded and fixed to the center of the base 202. A piston groove 2031 is opened in the central column 203, and a movable column 219 is slidably matched in the piston groove 2031. The movable column 219 passes through the rotating carrier 224 and is rotatably connected to the rotating carrier 224; a gear ring 204 is rotatably connected to the outside of the bottom of the central column 203. Specifically, the gear ring 204 is composed of a circular ring and external teeth. The gear ring 204 meshes with a first gear 205. The first gear is rotatably connected to the top of the base 202. A rotating driving member 206 is axially arranged on the first gear 205. The rotating driving member 206 is used to drive the first gear 205 to rotate. The rotating driving member 206 is a brushless motor, and the brushless motor is embedded in the base 202. The output shaft of the brushless motor and the first gear 205 are coaxially fixed through a coupling. One side of the gear ring 204 (i.e., the top of the circular ring) is rotatably connected to a connecting rod 213.

[0055] A second chute 225 is provided at the bottom of the rotating carrier 224. A slider 227 and a compression spring 226 are arranged in the second chute 225. The slider 227 is in sliding fit with the second chute 225. Preferably, in this embodiment, the elastic coefficient of the compression spring 226 is 300 N / mm. Both ends of the compression spring 226 are fixedly welded to the slider 227 and one end of the second chute 225 away from the central column 203 respectively; the bottom of the slider 227 is rotatably connected to the connecting rod 213.

[0056] A closed curve boss 228 is arranged on the inner wall of the function groove 201. Specifically, the closed curve boss 228 is integrally designed with the first carrier 2. The closed curve boss 228 is higher than the rotating carrier 224. The bottom contour of the closed curve boss 228 is a closed sine function curve extending along the inner wall of the function groove 201. A convex block 229 is fixedly welded on the side wall of the rotating carrier 224. In this embodiment, the rotating carrier 224 is in a disc shape. The convex block 229 is located at the edge of the disc. The convex block 229 is in sliding fit with the closed curve boss 228. Preferably, a buffer groove 230 is further provided at the top of the convex block 229. A buffer block 231 is in sliding fit in the buffer groove 230. A first spring 232 is placed between the buffer block 231 and the buffer groove 230.

[0057] The leg support carrier 217 is located above the rotating carrier 224. An adjusting assembly is arranged between the leg support carrier 217 and the rotating carrier 224. The adjusting assembly is used to adjust the movement range of the leg support carrier 217; specifically, in combination with Figure 3 Attachments Figure 6 Attachments Figure 8 Attachments Figure 9 and attachments

[0058] The rotating carrier 224 is provided with a fixing plate 222, a first chute 223 and a function column 211. The bottom of the fixing plate 222 is fixedly welded to the rotating carrier 224. The cylindrical columns 233 respectively penetrate through the fixing plate 222 and are rotatably connected to the fixing plate 222; the first chute 223 is opened at the top of the rotating carrier 224. The top of the function column 211 is rotatably connected to the leg support carrier 217. The bottom of the function column 211 is in sliding fit with the first chute 223. In combination with Figure 8As shown in the figure, an adjustment groove 237 is formed on one side of the functional column 211 close to the cylinder 233. A second carrier 240 and a moving assembly for moving the second carrier 240 are arranged in the adjustment groove 237. Specifically, the moving assembly includes an adjustment driving member 236 and an adjustment lead screw 238. The adjustment driving member 236 is used to drive the adjustment lead screw 238 to rotate. The adjustment driving member 236 is a stepping motor, which is fixed to the bottom of the adjustment groove 237 by bolts. The output shaft of the stepping motor is coaxially fixed to the adjustment lead screw 238 through a coupling. The top of the adjustment lead screw is rotationally matched with the adjustment groove 237. An adjustment nut seat 239 is in threaded fit with the adjustment lead screw 238, and the adjustment nut seat 239 is welded and fixed to the second carrier 240. A groove is formed on one side of the second carrier 240 close to the cylinder 233. A first magnetic block 242 is slidably fitted in the groove. A second spring 243 is arranged between the first magnetic block 242 and the groove. Two ends of the second spring 243 are respectively welded and fixed to the left side of the first magnetic block 242 and the inner wall of the groove. When the right end of the first magnetic block 242 is inserted into the spiral groove 234, it is slidably fitted with the spiral groove 234. A first electromagnet 241 for generating a magnetic force to adsorb the first magnetic block 242 is arranged in the second carrier 240.

[0059] A muscle strength training assembly is arranged on one side of the first carrier 2 away from the head of the bed body 1. Specifically, in combination with the attached Figure 1 drawing and the attached Figure 4 figure, the muscle strength training assembly includes a collar 3, a second magnetic block 303 and a second electromagnet 301. A third chute 302 is also formed on the top of the second carrier 240. The second magnetic block 303 is slidably fitted with the third chute 302. A traction rope is tied between the collar 3 and the second magnetic block 303. The second electromagnet 301 is fixed to the bottom of the third chute 302 by bolts. The second electromagnet 301 is used to generate a magnetic force to adsorb the second magnetic block 303.

[0060] The specific implementation process is as follows: Range of motion training of joints: The patient lies flat on the bed body 1, making the affected limb in a relaxed state. By starting the lifting driving member 207 (servo motor), the lifting lead screw 209 drives the lifting nut seat 210 to move upward, and then drives the base 202 to move upward until the leg support carrier 217 rises to a height suitable for the patient's affected limb. Place the patient's affected limb on the leg support carrier 217. Start the rotation driving member 206 (brushless motor) to drive the first gear 205 to rotate, and then drive the toothed ring 204 and the connecting rod 213 to move. The movement of the connecting rod 213 is transmitted to the rotating carrier 224 through the slider 227 and the compression spring 226, making it perform lifting and rotating movements simultaneously. The rotation of the rotating carrier 224 drives the cylinder 233 to rotate around the first bevel gear 220, and then drives the cylinder 233 to rotate. The rotation of the cylinder 233 drives the first magnetic block 242 to perform reciprocating movement in the spiral groove 234, and then drives the leg support carrier 217 to perform reciprocating movement (relative to the rotating carrier 224).

[0061] The overall movement trajectory of the leg support carrier 217 is a spiral centripetal or spiral centrifugal trajectory with undulations, and the spiral centripetal and spiral centrifugal movements alternate continuously to simulate the movements of the patient's knee joint bending and hip joint rotation.

[0062] If it is necessary to adjust the bending angle of the patient's knee joint or the rotation angle of the hip joint, the first electromagnet 241 can be controlled to generate magnetic force to adsorb the first magnetic block 242 out of the spiral groove 234 of the current cylinder 233.

[0063] Start the moving component (stepping motor) to drive the adjusting lead screw 238 to rotate, thereby driving the adjusting nut seat 239 and the second carrier 240 to move.

[0064] Move the first magnetic block 242 to the position flush with the spiral groove 234 of another cylinder 233, and then release the magnetic force of the first electromagnet 241, so that the first magnetic block 242 is inserted into the spiral groove 234 of this cylinder 233 under the action of the second spring 243.

[0065] The lengths of the spiral grooves 234 on different cylinders 233 are different, so the moving ranges of the leg support carrier 217 are also different, thus realizing the personalized adjustment of the joint movement range of the patient.

[0066] When the predetermined training time is reached or the patient feels fatigued, stop the rotation driving member 206. With the assistance of medical staff, the patient gently removes the affected limb from the leg support carrier 217. Start the lifting driving member 207 to lower the base 202 and the leg support carrier 217 back to the initial position.

[0067] Muscle strength training: The patient lies flat on the bed body 1, ensuring that the affected limb is in a relaxed state. Medical staff assist the patient to put the collar 3 on the affected limb (the instep or ankle), and adjust the magnetic force of the second electromagnet 301 according to the muscle strength level of the patient, so as to control the sliding resistance of the second magnetic block 303 in the third chute 302. Under the guidance of medical staff, the patient starts to straighten the affected limb and perform a flat-lifting action.

[0068] The flat-lifting action of the affected limb is transmitted to the second magnetic block 303 through the traction rope, causing it to slide in the third chute 302. The sliding resistance of the second magnetic block 303 counteracts the muscle strength of the patient, thereby realizing the personalized training of the patient's muscle strength.

[0069] If it is necessary to adjust the training intensity, it can be achieved by controlling the magnetic force of the second electromagnet 301. The greater the magnetic force, the greater the sliding resistance of the second magnetic block 303, and the higher the training intensity; conversely, the smaller the magnetic force, the lower the training intensity.

[0070] When the predetermined training time is reached or the patient feels fatigued, stop the muscle strength training. The patient removes the collar 3 from the affected limb to end the training.

[0071] The difference between Example 2 and the above Example 1 is only that, as shown in the attached Figure 3 As shown, an opening and closing mechanism is further provided on the functional groove 201; the opening and closing mechanism includes a receiving groove 216 opened on the top side wall of the functional groove 201, a rotating cover 215 and an opening and closing driving member 214 are provided in the receiving groove 216, the rotating cover 215 is rotatably connected to the receiving groove 216, and the opening and closing driving member 214 is used to drive the rotating cover 215 to deflect between the functional groove 201 and the receiving groove 216. In this embodiment, the opening and closing driving member 214 is a common motor, the common motor is embedded at the bottom of the receiving groove 216, and the output shaft of the common motor is fixedly welded to the rotating cover 215.

[0072] Specific implementation process: When the rehabilitator is in an idle state, start the opening and closing driving member 214. As the rotating cover 215 deflects, it gradually screws into the functional groove 201 until it completely covers the opening part of the functional groove 201. During this process, the edge of the rotating cover 215 is in close contact with the side wall of the functional groove 201 to ensure there is no gap. When it is necessary to use the rehabilitator for training again, start the common motor to make the output shaft of the common motor rotate in the reverse direction, and the rotating cover 215 deflects in the reverse direction in the receiving groove 216. As the rotating cover 215 deflects, it gradually screws out of the functional groove 201 until the opening part of the functional groove 201 is completely exposed.

[0073] The difference between Example 3 and the above Example 2 is only that inclined grooves 235 are provided on the cylinders 233, and one end of the inclined groove 235 is communicated with the spiral groove 234 at a preset angle.

[0074] Specific implementation process: By adding the inclined grooves 235 on the cylinders 233, when the functional column 211 switches gears at any position in the first sliding groove 223 (since the length of the spiral groove 234 on the cylinder 233 in the low gear is shorter), the first magnetic block 242 can smoothly insert into the spiral groove 234. For example, when the first magnetic block 242 switches from the spiral groove 234 in the higher gear to the spiral groove 234 in the lower gear, if the first magnetic block 242 is outside the spiral groove 234 in the lower gear, at this time the first magnetic block 242 will preferentially insert into the inclined groove 235 and then be introduced into the spiral groove 234 along the inclined groove 235. Since there is a preset angle between the inclined groove 235 and the spiral groove 234, it is relatively easy to slide from the inclined groove 235 into the spiral groove 234, while it is more difficult to slide out of the spiral groove 234 into the inclined groove 235. Thus, the inclined groove 235 does not affect the normal reciprocating movement of the first magnetic block in the spiral groove 234.

[0075] The difference between Example 4 and the above Example 3 is only that, as shown in the attached Figure 3 and the attachedFigure 5 As shown, a massage mechanism is further provided on the leg support carrier 217; the massage mechanism includes a number of massage grooves. Specifically, in this embodiment, the leg support carrier 217 is an arc-shaped structure conforming to the calf structure of the human body, and the massage grooves are evenly opened on the arc surface of the leg support carrier 217, and massage air bags 2171 are adhesively fixed in the massage grooves. A slip ring 218 is further provided between the leg support carrier 217 and the functional column 211. In this embodiment, the slip ring 218 has an outlet and an inlet, the massage air bags 2171 are all communicated with the outlet of the slip ring 218, and a conduit 212 is communicated with the inlet of the slip ring 218.

[0076] Combined with the attached Figure 6 As shown, an air vent duct 2032 is opened in the movable column 219, and the air vent duct 2032 is respectively communicated with the conduit 212 and the piston groove 2031.

[0077] Preferably, air pressure sensors 2172 are installed in the massage air bags 2171, and the air pressure sensors 2172 are electrically connected to the same control unit. The control unit is used to judge the pain condition of the patient's joint based on the data collected by each air pressure sensor 2172, and adjust the joint activity range of the patient, and obtain the air pressure sensors 2172 with abnormal data collection. If the number of air pressure sensors 2172 with abnormal data collection is higher than the preset number, it is judged that the patient's joint is painful, and the joint activity range of the patient is lowered. The more the number of air pressure sensors 2172 with abnormal data collection, the greater the degree of joint pain of the patient, and the smaller the joint activity range adjusted by the control unit.

[0078] Specific implementation process: When the patient performs joint range of motion training, the control unit continuously receives the air pressure data sent by each air pressure sensor 2172. Compare each air pressure data with the preset normal air pressure range (or the data of one air pressure sensor 2172 differs from that of other air pressure sensors 2172 by more than the threshold value), and identify the air pressure sensors 2172 with abnormal data collection (that is, the air pressure data deviates from the normal range).

[0079] If the number of air pressure sensors 2172 with abnormal data collection exceeds the preset number, the control unit judges that the patient's joint is painful. The more the number of abnormal sensors, the greater the degree of joint pain of the patient. According to the pain degree, the control unit automatically adjusts the joint activity range of the patient to relieve pain and promote recovery.

[0080] In this embodiment, a user interface is further provided for displaying the current pain assessment result and joint activity range adjustment suggestion, so that medical staff or patients can make further decisions.

[0081] The above are only embodiments of the present invention, and common general knowledge of specific structures and / or characteristics in the solution is not described in detail herein. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope claimed in this application shall be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. A joint rehabilitation device after total knee replacement, comprising a bed body (1); characterized in that: A functional groove (201) is provided at the top of the first carrier (2); a joint range of motion training assembly is provided in the functional groove (201); the joint range of motion training assembly includes a base (202), a lifting mechanism, a rotating carrier (224), and a leg support carrier (217); the base (202) is slidably engaged with the functional groove (201), the lifting mechanism is used to drive the base (202) to lift, the rotating carrier (224) is located above the base (202), a rotating and lifting assembly is provided between the rotating carrier (224) and the base (202), and the rotating and lifting assembly is used to drive the rotating carrier (224) to perform lifting and rotating motions simultaneously; the leg support carrier (217) is located above the rotating carrier (224), and an adjusting assembly is provided between the leg support carrier (217) and the rotating carrier (224), and the adjusting assembly is used to adjust the range of motion of the leg support carrier (217). A muscle strength training assembly is provided on the side of the first carrier (2) away from the head of the bed body (1).

2. The joint rehabilitation device after total knee arthroplasty according to claim 1, characterized in that: The lifting mechanism includes a lifting groove (208) opened on the side wall of the functional groove (201); a lifting lead screw (209) and a lifting driving member (207) are provided in the lifting groove (208), the lifting driving member (207) is used to drive the lifting lead screw (209) to rotate, the lifting lead screw is rotationally engaged with the lifting groove (208), a lifting nut seat (210) is threadedly engaged with the lifting lead screw (209), and the lifting nut seat (210) is fixedly connected to the base (202).

3. The joint rehabilitation device after total knee arthroplasty according to claim 2, characterized in that: The rotating and lifting assembly includes a central column (203); the central column (203) is located at the center of the base (202), a piston groove (2031) is provided in the central column (203), a movable column (219) is slidably engaged in the piston groove (2031), the movable column (219) penetrates through the rotating carrier (224) and is rotationally connected to the rotating carrier (224); a gear ring (204) is rotatably connected to the outside of the central column (203), the gear ring (204) meshes with a first gear (205), a rotating driving member (206) is axially provided on the first gear (205), the rotating driving member (206) is used to drive the first gear (205) to rotate, and a connecting rod (213) is rotatably connected to one side of the gear ring (204). A second chute (225) is provided at the bottom of the rotating carrier (224), a slider (227) and a compression spring (226) are provided in the second chute (225), the slider (227) is slidably engaged with the second chute (225), and both ends of the compression spring (226) are fixedly connected to the slider (227) and one end of the second chute (225) away from the central column (203); the slider (227) is rotationally connected to the connecting rod (213). A closed curve boss (228) is provided on the inner wall of the functional groove (201), the closed curve boss (228) is higher than the rotating carrier (224), and a convex block (229) is provided on the side wall of the rotating carrier (224), and the convex block (229) is slidably engaged with the closed curve boss (228).

4. The joint rehabilitator after total knee replacement according to claim 3, wherein: The adjustment assembly includes a number of first bevel gears (220); the first bevel gears (220) are all axially fixedly connected to the movable column (219), each of the first bevel gears (220) meshes with a second bevel gear (221) respectively, the second bevel gears (221) are all axially fixedly connected to a cylinder (233), spiral grooves (234) are symmetrically arranged on the cylinders (233), the spiral grooves (234) are interconnected in a staggered manner, from high to low of the cylinder (233), the length of the spiral groove (234) gradually shortens; A fixing plate (222), a first sliding groove (223) and a functional column (211) are arranged on the rotating carrier (224); the cylinders (233) respectively penetrate through the fixing plate (222) and are rotatably connected to the fixing plate (222); the top of the functional column (211) is rotatably connected to the leg support carrier (217), the bottom of the functional column (211) is slidably matched with the first sliding groove (223), an adjustment groove (237) is arranged on one side of the functional column (211) close to the cylinder (233), a second carrier (240) and a moving assembly for moving the second carrier (240) are arranged in the adjustment groove (237), a groove is arranged on one side of the second carrier (240) close to the cylinder (233), a first magnetic block (242) is slidably matched in the groove, a second spring (243) is arranged between the first magnetic block (242) and the groove, when the first magnetic block (242) is inserted into the spiral groove (234), it is slidably matched with the spiral groove (234), and a first electromagnet (241) for generating a magnetic force to adsorb the first magnetic block (242) is arranged in the second carrier (240).

5. The joint rehabilitation device after total knee replacement according to claim 4, characterized in that: The moving assembly includes an adjustment driving member (236) and an adjustment lead screw (238); the adjustment driving member (236) is used to drive the adjustment lead screw (238) to rotate, the adjustment lead screw is rotatably matched with the adjustment groove (237), an adjustment nut seat (239) is in threaded cooperation with the adjustment lead screw (238), and the adjustment nut seat (239) is fixedly connected to the second carrier (240).

6. The joint rehabilitation device after total knee arthroplasty according to claim 5, characterized in that: An opening and closing mechanism is also arranged on the functional groove (201); the opening and closing mechanism includes a receiving groove (216) opened on the side wall of the functional groove (201), a rotating cover (215) and an opening and closing driving member (214) are arranged in the receiving groove (216), the rotating cover (215) is rotatably connected to the receiving groove (216), and the opening and closing driving member (214) is used to drive the rotating cover (215) to deflect between the functional groove (201) and the receiving groove (216).

7. The joint rehabilitator after total knee replacement according to claim 6, characterized in that: A buffer groove (230) is arranged at the top of the convex block (229), a buffer block (231) is slidably matched in the buffer groove (230), and a first spring (232) is arranged between the buffer block (231) and the buffer groove (230).

8. The joint rehabilitation device after total knee arthroplasty according to claim 7, characterized in that: A massage mechanism is also arranged on the leg support carrier (217); the massage mechanism includes a number of massage grooves, and massage air bags (2171) are arranged in the massage grooves; a slip ring (218) is also arranged between the leg support carrier (217) and the functional column (211), the massage air bags (2171) are all communicated with the outlet of the slip ring (218), and the inlet of the slip ring (218) is communicated with a conduit (212); An air vent pipe (2032) is provided inside the movable column (219), and the air vent pipe (2032) is communicated with the catheter (212) and the piston groove (2031) respectively.

9. The joint rehabilitation device after total knee arthroplasty according to claim 8, characterized in that: A pressure sensor (2172) is provided inside each massage airbag (2171), and each pressure sensor (2172) is electrically connected to a control unit. The control unit is used to judge the pain condition of the patient's joint based on the data collected by each pressure sensor (2172), adjust the joint movement range of the patient, and obtain the pressure sensor (2172) with abnormal data collection. If the number of pressure sensors (2172) with abnormal data collection is higher than the preset number, it is judged that the patient's joint is painful, and the joint movement range of the patient is lowered. The more the number of pressure sensors (2172) with abnormal data collection, the greater the pain degree of the patient's joint, and the smaller the joint movement range adjusted by the control unit.

10. The joint rehabilitator after total knee replacement according to claim 9, wherein: The muscle strength training component includes a collar (3), a second magnetic block (303) and a second electromagnet (301); a third chute (302) is further provided on the second carrier (240), the second magnetic block (303) is slidably matched with the third chute (302), a traction rope is arranged between the collar (3) and the second magnetic block (303), and the second electromagnet (301) is used to generate a magnetic force to adsorb the second magnetic block (303).

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