A patellar exercise device for the adjunctive treatment of knee osteoarthritis

Abstract

The application relates to the field of medical rehabilitation equipment, in particular to a patella exercise device for auxiliary treatment of knee osteoarthritis. The patella exercise device for auxiliary treatment of knee osteoarthritis comprises an elastic band, a plate sleeve, a clamping plate, a mounting frame, a fixing mechanism and a supporting mechanism, the plate sleeve is slidably connected to the mounting frame, the clamping plates are clamped to the left and right sides of the plate sleeve, the elastic band is sleeved between the plate sleeve and the clamping plates, the fixing mechanism for fixing the mounting frame is arranged at the upper and lower ends of the mounting frame, and the supporting mechanism for supporting the legs of a patient is arranged at the bottom of the mounting frame. The movable clamping plate is simply and effectively fixed, so that the patient can carry out rehabilitation exercise under different conditions, the exercise process is simple, the bottom base and the top frame can be rotated to support the feet, and the same exercise effect is guaranteed for each time of stretching the elastic band.

Description

Technical Field

[0001] This invention relates to the field of medical rehabilitation equipment, and more particularly to a patellar exercise device for adjunctive treatment of knee osteoarthritis. Background Technology

[0002] Knee osteoarthritis is a chronic joint disease that is usually caused by degenerative changes in the knee cartilage, trauma, or overuse, and manifests as joint pain, stiffness, swelling, and limited range of motion. The patella (kneecap) is an important component of the knee joint.

[0003] A patellar exercise device for the adjunctive treatment of knee osteoarthritis, disclosed in CN114344107A, relates to the field of patellar exercise therapy technology. It includes a base, a functional box, a partition plate, a first gear, a second gear, a servo motor, a threaded rod, a slide groove, a T-slot, and a multi-section telescopic rod. By incorporating the first gear, weight plate, second gear, chain, connecting shaft, and foot pedal, the device facilitates better patellar exercise through chain transmission, enhancing the patient's pedaling effect. The weight plate provides resistance during pedaling, making the exercise more effective. The slide groove, T-slot, servo motor, threaded rod, smooth rod, rectangular block, slider, threaded hole, T-shaped support column, and bearing seat allow for easy left-right movement and adjustment of the seat, enabling patients of different body types to exercise comfortably. The slide groove and T-slot limit the slider and T-shaped support column, improving seat stability. Furthermore, the left-right movement of the seat allows patients to perform patellar extension exercises and relaxation.

[0004] Because it requires an external power source and can only be used in locations with a stable power supply, the device is relatively large and requires ample space for placement and operation, severely limiting its application. Furthermore, patients need to sequentially activate the servo motor, adjust the seat position, step on the foot pedals for exercise, readjust the seat position for stretching and relaxation, and finally use the lower and upper leg supports for heating and massage. While these steps are orderly, the sheer number of steps can increase the patient's workload. Basic research in sports medicine should be closely integrated with actual clinical needs, addressing issues such as rehabilitation, treatment, and prevention after joint injuries. During the commercialization of scientific and technological achievements, patient needs and satisfaction should always be considered to ensure that the developed products and services truly solve patients' problems and are convenient for them to use. However, the aforementioned patent faces several challenges in practical application, such as severely limited application locations and relatively complex equipment usage. Summary of the Invention

[0005] To overcome the drawbacks of limited exercise locations and complicated usage, this invention provides a practical patellar exercise device for the adjunctive treatment of knee osteoarthritis.

[0006] A patellar exercise device for adjunctive treatment of knee osteoarthritis includes an elastic band, a plate sleeve, a clamping plate, a mounting frame, a fixing mechanism, and a support mechanism. The plate sleeve is slidably connected to the mounting frame, and clamping plates are clamped on the left and right sides of the plate sleeve. An elastic band is sleeved between the plate sleeve and the clamping plates. Fixing mechanisms for fixing the mounting frame are provided at the upper and lower ends of the mounting frame, and a support mechanism for supporting the patient's leg is provided at the bottom of the mounting frame.

[0007] Preferably, the fixing mechanism includes a triangular plate, a bent component, a lead screw, a handle, and a movable clamping plate. A triangular plate is connected to each of the upper and lower ends of the mounting frame. The bent component is rotatably connected inside the triangular plate, and the movable clamping plate is slidably connected to the outer end of the bent component. One end of the movable clamping plate is shorter than the other end. Both ends of the lead screw are rotatably connected to the movable clamping plate. A handle is connected to the shorter end of the lead screw and the movable clamping plate. The middle of the lead screw is threadedly connected to the outer end of the bent component.

[0008] Preferably, the support mechanism includes a connecting seat, a rotating shaft, a base, a connecting frame, a top frame, a torsion spring, and a pull rope. The bottom of the mounting frame is connected to the connecting seat, the connecting seat is connected to the rotating shaft, and the connecting frame is rotatably connected to the rotating shaft. The bottom of the connecting frame is connected to one end of the base, and the other end of the base is rotatably connected to the top frame. A torsion spring is fitted at the connection between the bottom of the top frame and the base. One end of the torsion spring is connected to the base, and the other end is connected to the top frame, which provides a restoring force after the top frame rotates. One end of the pull rope is connected to the bottom of the top frame, and the other end is connected to the end of the rotating shaft.

[0009] Preferably, an adjustment mechanism is also included. The adjustment mechanism includes a mounting plate, a winding double rod, a throttle, a positioning rod, and an elastic element I. The mounting plate is connected to the upper and lower ends of the rear side of the plate sleeve. The winding double rod is rotatably connected between the mounting plates. The upper and lower ends of the winding double rod are respectively connected to the throttle. Two positioning rods are connected to the throttle. The mounting plate has two positioning holes. The positioning rods are matched with the positioning holes. The elastic element I is sleeved on the positioning rod. One end of the elastic element I is connected to the throttle, and the other end is connected to the positioning rod. The winding double rod has an opening for the elastic band to pass through.

[0010] Preferably, the device also includes an auxiliary treatment mechanism, which includes a power supply, wires, patches, and a placement rack. The power supply is installed on the upper and lower parts of the mounting rack, and multiple wires are led out from the power supply. The other end of the wires is connected to the patch. The placement rack is connected to the upper and lower parts of the mounting rack and has a flat groove on which the patch can be placed.

[0011] Preferably, the device also includes a connecting plate and a tightening screw. The connecting plate is connected to the clamping plate, and the tightening screw is threaded onto the connecting plate, with the end of the tightening screw engaging with the mounting bracket.

[0012] Preferably, it also includes a pin and an elastic element II. The connecting seat has multiple positioning grooves on both sides, and the connecting frame has multiple through holes. The pin is slidably connected in the positioning groove of the connecting seat and the through holes of the connecting frame, and the elastic element II is sleeved at both ends of the rotating shaft.

[0013] Preferably, it also includes a gasket and a soft sleeve. The end of the movable clamp plate that is rotatably connected to the lead screw is connected to a gasket, and a soft sleeve is fitted on the top frame.

[0014] Compared with the prior art, the present invention has the following advantages: The movable splint provides a simple and effective fixation method, enabling patients to perform rehabilitation exercises under different conditions. The exercise process is also simple, as the rotatable base and top frame support the feet, ensuring that each stretch of the elastic band provides the same exercise effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention from a first perspective.

[0016] Figure 2 This is a schematic diagram of the overall structure of the present invention from a second perspective.

[0017] Figure 3 This is a schematic diagram of the connection structure of the elastic band, clamping plate, and mounting bracket of the present invention.

[0018] Figure 4 This is a cross-sectional view of the installation structure of the fixing mechanism of the present invention.

[0019] Figure 5 This is a schematic diagram of the connection structure of the handle, movable clamp, and gasket of the present invention.

[0020] Figure 6 This is a schematic diagram of the installation structure of the support mechanism of the present invention.

[0021] Figure 7 This is a schematic diagram of the installation structure of the adjustment mechanism of the present invention.

[0022] Figure 8 This is a schematic diagram of the installation structure of the auxiliary therapy device of the present invention.

[0023] Figure 9 This is a schematic diagram of the connection structure of the connecting plate and the tightening screw of the present invention.

[0024] Figure 10 This is a schematic diagram of the connection structure between the pin and the elastic element II of the present invention.

[0025] Figure 11 This is an exploded view of the connector, shaft, connecting frame, and pin of the present invention.

[0026] Explanation of reference numerals in the attached drawings: 1_elastic band, 11_plate sleeve, 12_clamping plate, 13_mounting bracket, 2_fixing mechanism, 21_triangle plate, 22_bending part, 23_lead screw, 24_handle, 25_movable clamping plate, 26_shim, 3_support mechanism, 31_connecting seat, 311_positioning groove, 32_rotating shaft, 33_base, 34_connecting bracket, 341_through hole, 35_top frame, 351_soft sleeve, 36_torsion spring, 37_pull rope, 4_adjustment mechanism, 41_mounting plate, 411_positioning hole, 42_rewinding double rod, 421_opening, 43_handle, 44_positioning rod, 45_elastic element I, 5_auxiliary therapy mechanism, 51_power supply, 52_wire, 53_patch, 54_placement bracket, 6_connecting plate, 61_tightening screw, 7_pin, 71_elastic element II. Detailed Implementation

[0027] The following description is only a preferred embodiment of the present invention and does not limit the scope of protection of the present invention.

[0028] Example: A patellar exercise device for adjunctive treatment of knee osteoarthritis, such as... Figures 1-3 As shown, the device includes an elastic band 1, a sleeve 11, a retaining plate 12, a mounting frame 13, a fixing mechanism 2, and a support mechanism 3. The sleeve 11 is slidably connected to the mounting frame 13. The retaining plates 12 are engaged on the left and right sides of the sleeve 11. The retaining plates 12 are interference-fitted with the mounting frame 13. After the retaining plates 12 come into contact with the mounting frame 13, the retaining plates 12 are difficult to slide up and down. An elastic band 1 is sleeved between the sleeve 11 and the retaining plates 12. The mounting frame 13 is provided with a fixing mechanism 2 at both the upper and lower ends for fixing the mounting frame 13. The mounting frame 13 is provided with a support mechanism 3 at the bottom for supporting the patient's legs.

[0029] like Figure 4 and Figure 5 As shown, the fixing mechanism 2 includes a triangular plate 21, a bent piece 22, a lead screw 23, a handle 24, and a movable clamping plate 25. A triangular plate 21 is connected to each of the upper and lower ends of the mounting frame 13. The bent piece 22 is rotatably connected inside the triangular plate 21. The movable clamping plate 25 is slidably connected to the outer end of the bent piece 22. One end of the movable clamping plate 25 is shorter and the other end is longer. Both ends of the lead screw 23 are rotatably connected to the movable clamping plate 25. The handle 24 is connected to the shorter end of the lead screw 23 and the outer end of the bent piece 22. The middle of the lead screw 23 is threadedly connected to the outer end of the bent piece 22.

[0030] like Figure 1 and Figure 6As shown, the support mechanism 3 includes a connecting seat 31, a rotating shaft 32, a base 33, a connecting frame 34, a top frame 35, a torsion spring 36, and a pull rope 37. The bottom of the mounting frame 13 is connected to the connecting seat 31, the connecting shaft 32 is connected to the connecting seat 31, the connecting frame 34 is rotatably connected to the rotating shaft 32, the bottom of the connecting frame 34 is connected to one end of the base 33, and the other end of the base 33 is rotatably connected to the top frame 35. A torsion spring 36 is sleeved at the connection between the bottom of the top frame 35 and the base 33. One end of the torsion spring 36 is connected to the base 33, and the other end is connected to the top frame 35, which is used to provide a restoring force after the top frame 35 rotates. One end of the pull rope 37 is connected to the bottom of the top frame 35, and the other end is connected to the end of the rotating shaft 32. A top block is provided at the connection between the base 33 and the top frame 35 to limit the rotation direction of the top frame 35.

[0031] Before using the exercise device for daily knee joint rehabilitation exercises, patients with knee osteoarthritis (hereinafter referred to as patients) fix the mounting bracket 13 to an object through the fixing mechanism 2. This object can be the side of a wall, a table leg, a bed leg, or a bed board. Exercises can be performed in both standing and lying positions, fulfilling the initial intention of developing products and services that truly solve patients' usage problems and making it convenient for patients to use. Before the first use, the position of the plate sleeve 11 needs to be adjusted according to the patient's knee position, and the clamping plate 12 needs to be removed. Due to the interference fit between the clamping plate 12 and the mounting bracket 13, the clamping plate 12 is difficult to slide up and down after contact with the mounting bracket 13. After adjusting to a suitable height, the elastic band 1 is wrapped around the plate sleeve 11 and fixed to the plate sleeve 11 by the interference fit between the clamping plate 12 and the mounting bracket 13, thereby limiting the up and down sliding of the plate sleeve 11. Moreover, the direction of pulling the elastic band 1 will not squeeze the clamping plate 12. After fixing the mounting bracket 13 by the fixing mechanism 2, when standing for exercise, the patient puts the bent leg into the elastic band 1, bends the knee, and presses the foot against the support mechanism 3. Then the leg is straightened and the elastic band is stretched to perform knee joint exercises. Compared with only one elastic band 1, when the patient exercises, the foot will not move forward slowly, thus not shortening the stretching distance of the elastic band 1, which can ensure the exercise effect. For different connected objects, the mounting bracket 13 is parallel to the connected object, such as a wall and a bed board. When the fixing mechanism 2 is connected to the wall, the mounting plate 41 is vertical and attached to the wall. Then, the handle 24 is turned, which drives the lead screw 23 to rotate. The lead screw 23 rotates on the bending part 22 and moves forward, pulling the movable clamp 25 to move as a whole. After moving a distance, the movable clamp 25 contacts the other side of the wall, fixing the mounting bracket 13 from both the top and bottom. If fixed to the bed board, the mounting bracket 13 contacts the top surface of the bed board, and the movable clamp 25 contacts the side and bottom surfaces of the bed, thus fixing the mounting bracket 13. After exercise, the lead screw 23 is turned to detach the movable clamp 25 from the wall or bed. After removing the mounting bracket 13, the bending part 22 can be rotated to rotate and fold the fixing mechanism 2 at both the top and bottom to the middle, saving storage space. Before fixing the mounting bracket 13, the patient flips up the top frame 35, which rotates on the base 33. Then, the pull rope 37 pulls the rotating shaft 32, causing the bottom of the base 33 to touch the ground and the mounting bracket 13 to touch the wall. This creates a 90-degree angle between the base 33 and the mounting bracket 13. During the subsequent fixing of the mounting bracket 13, it remains against the wall, so the angle between the base 33 and the mounting bracket 13 is 90 degrees, and the angle between the top frame 35 and the base 33 is also 90 degrees. When the patient stands for exercise, their legs pass through the elastic band 1, and their feet... With the front of the ankle against the top frame 35, the patient continuously bends and straightens the leg to perform the exercise. When the mounting frame 13 is fixed on the bed, the patient lies on the bed with the heel on the top frame 35 and the knee in the elastic band 1, also bending and straightening the leg to complete the exercise. After completing the exercise, without the mounting frame 13 contacting other objects, the mounting frame 13 is lowered, and the connecting seat 31 and the rotating shaft 32 rotate with the mounting frame 13. The pull ropes 37 connected to both ends of the rotating shaft 32 are loosened, and the top frame 35 can be reset and rotated, making the top frame 35 parallel to the base 33, reducing the thickness of the entire device and making it easier to place.

[0032] like Figure 2 and Figure 7 As shown, it also includes an adjustment mechanism 4, which includes a mounting plate 41, a winding double rod 42, a throttle 43, a positioning rod 44, and an elastic element I 45. The mounting plate 41 is connected to the upper and lower ends of the rear side of the plate sleeve 11. The winding double rod 42 is rotatably connected between the mounting plates 41. The upper and lower ends of the winding double rod 42 are respectively connected to the throttle 43. Two positioning rods 44 are connected to the throttle 43. The mounting plate 41 has two positioning holes 411. The positioning rods 44 are limited to the positioning holes 411. The positioning rods 44 are fitted with the elastic element I 45. One end of the elastic element I 45 is connected to the throttle 43, and the other end is connected to the positioning rod 44. The positioning rods 44 pass through the positioning holes 411 on the mounting plate 41 and are held in the positioning holes 411 by the elastic force of the elastic element I 45 to prevent the positioning rods 44 from accidentally coming out. The winding double rod 42 has an opening 421 for the elastic band 1 to pass through.

[0033] Before first use, the elastic band 1 needs to pass through the opening 421 of the winding double rod 42 and enter the gap in the middle of the winding double rod 42. To meet the exercise needs of different patients, the elastic band 1 can be adjusted by the adjustment mechanism 4 at different stretching lengths. When the elastic band 1 is at its longest, less force is required to stretch it a certain distance. As the length of the elastic band 1 decreases, more force is required to pull it the same distance. Thus, according to their exercise needs, the patient pulls up the handle 43 to further compress the elastic element I 45, causing the positioning rod 44 to disengage. The mounting plate 41 is positioned in the positioning hole 411. Then, the throttle 43 is turned, and the elastic band 1 wound around the double rod 42 is increased, shortening the effective tensile length of the elastic band 1, thereby increasing the elastic force of equal deformation distance. Then, the positioning rod 44 is reinserted into the positioning hole 411 of the mounting plate 41, and the elastic element I 45 is always in a compressed state, pushing the positioning rod 44 into the positioning hole 411, making it difficult for the positioning rod 44 to disengage upward from the positioning hole 411, ensuring safety during exercise. When unwinding the elastic band 1, the already wound double rod 42 is rotated in the opposite direction.

[0034] like Figure 8 As shown, it also includes an auxiliary treatment mechanism 5, which includes a power supply 51, wires 52, patches 53, and a placement frame 54. The power supply 51 integrates a control device and a data storage device, which can control the output current and record data. The power supply 51 is installed on the upper and lower parts of the mounting frame 13. Two wires 52 are led out from the power supply 51, and the other end of each wire 52 is connected to a patch 53. The placement frame 54 is connected to the upper and lower parts of the mounting frame 13. The placement frame 54 is provided with a flat groove, and the patch 53 can be placed on the placement frame 54.

[0035] Before exercising, the patient applies patch 53 to their leg. Patch 53 is connected to power supply 51 via wire 52. Power supply 51 supplies power to patch 53, forming a current patch that can emit electrical pulses to stimulate muscles, similar to a neuromuscular electrical stimulator. Power supply 51 integrates a controller and data recording device to control the intensity and frequency of the current stimulation and record the electrophysiological signals generated during the patient's exercise. The charged patch 53 provides adjustable electrical stimulation by emitting low-frequency pulsed current, helping to strengthen leg muscles, improve blood circulation, and relieve pain. The use of non-invasive, low-intensity electrical stimulation ensures the safety and comfort of the treatment process. Moreover, the recorded data includes the intensity, frequency, and duration of muscle activity, which is of great significance for assessing rehabilitation progress and adjusting training plans. Regular visits to the rehabilitation center for analysis, under the guidance of doctors or rehabilitation therapists, allow for personalized treatment based on the patient's specific condition and needs.

[0036] like Figure 9As shown, it also includes a connecting plate 6 and a tightening screw 61. The connecting plate 6 is connected to the clamping plate 12, and the tightening screw 61 is threadedly connected to the connecting plate 6, with the end of the tightening screw 61 being press-fitted with the mounting bracket 13.

[0037] After adjusting the position of the sleeve 11, insert the clamping plate 12, and then rotate the tightening screw 61. The tightening screw 61 passes through the connecting plate 6 and contacts and presses against the side of the mounting bracket 13. Thus, through the interaction between the connecting plate 6 and the clamping plate 12, the clamping plate 12 is fixed and its movement is restricted, further fixing the position of the sleeve 11.

[0038] like Figure 10 and Figure 11 As shown, it also includes a pin 7 and an elastic element II 71. Multiple positioning grooves 311 are opened on both sides of the connecting seat 31, and multiple through holes 341 are opened on the connecting frame 34. The pin 7 is slidably connected in the positioning grooves 311 of the connecting seat 31 and the through holes 341 of the connecting frame 34. The elastic element II 71 is sleeved at both ends of the rotating shaft 32.

[0039] When the mounting bracket 13 is connected to and correctly installed with the base 33, they can maintain a 90-degree angle. To further facilitate installation, before installation, pull out the pins 7 at both ends so that the pins 7 leave the positioning groove 311 of the connecting seat 31 and do not pass through the through hole 341 of the connecting bracket 34, compressing the elastic element II 71. Then rotate the mounting bracket 13, and the connecting seat 31 and the rotating shaft 32 will rotate accordingly. Since there are four positioning grooves 311 and four through holes 341 on one side, after rotating 90 degrees, the pins 7 will spring back to their original position. Under the rebound force of the elastic component II 71, it passes through the through hole 341 of the connecting frame 34 and is inserted into the positioning groove 311 of the connecting seat 31, thereby locking the 90-degree angle between the mounting frame 13 and the base 33. When the rotating shaft 32 rotates, the top frame 35 is pulled up by the pull rope 37, so that the overall state of the device has changed to the state during exercise, which facilitates the subsequent fixation process. Moreover, when the patient is exercising while lying down, the pin 7 locks the base 33, and the top frame 35 will not rotate after the patient's feet leave the top frame 35.

[0040] like Figure 5 and Figure 6 As shown, it also includes a gasket 26 and a soft sleeve 351. The end of the movable clamping plate 25 that is rotatably connected to the lead screw 23 is connected to the gasket 26, and the soft sleeve 351 is fitted on the top frame 35.

[0041] The pads 26 added to the inside of the movable splint 25 are designed to enhance the friction between the splint and other objects, thereby more effectively fixing the mounting bracket 13. The soft sleeve 351 on the top frame 35 can effectively protect the patient's feet and provide a comfortable cushioning effect when supporting the force.

[0042] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A patellar exercise device for adjunctive treatment of knee osteoarthritis, characterized in that, It includes an elastic band (1), a plate sleeve (11), a clamping plate (12), a mounting frame (13), a fixing mechanism (2), and a support mechanism (3). The plate sleeve (11) is slidably connected to the mounting frame (13). The clamping plates (12) are clamped on the left and right sides of the plate sleeve (11). An elastic band (1) is sleeved between the plate sleeve (11) and the clamping plates (12). The mounting frame (13) is provided with a fixing mechanism (2) for fixing the mounting frame (13) at both the top and bottom ends. The mounting frame (13) is provided with a support mechanism (3) for supporting the patient's legs at the bottom.

2. The patellar exercise device for adjuvant treatment of knee osteoarthritis according to claim 1, characterized in that, The fixing mechanism (2) includes a triangular plate (21), a bent piece (22), a lead screw (23), a handle (24), and a movable clamping plate (25). A triangular plate (21) is connected to each of the upper and lower ends of the mounting frame (13). The bent piece (22) is rotatably connected inside the triangular plate (21). The movable clamping plate (25) is slidably connected to the outer end of the bent piece (22). One end of the movable clamping plate (25) is shorter and the other end is longer. Both ends of the lead screw (23) are rotatably connected to the movable clamping plate (25). The handle (24) is connected to the shorter end of the lead screw (23) and the outer end of the bent piece (22). The middle of the lead screw (23) is threadedly connected to the outer end of the bent piece (22).

3. The patellar exercise device for adjuvant treatment of knee osteoarthritis according to claim 2, characterized in that, The support mechanism (3) includes a connecting seat (31), a rotating shaft (32), a base (33), a connecting frame (34), a top frame (35), a torsion spring (36), and a pull rope (37). The bottom of the mounting frame (13) is connected to the connecting seat (31), the connecting seat (31) is connected to the rotating shaft (32), the rotating shaft (32) is rotatably connected to the connecting frame (34), the bottom of the connecting frame (34) is connected to one end of the base (33), the other end of the base (33) is rotatably connected to the top frame (35), the bottom of the top frame (35) is fitted with a torsion spring (36) at the connection between the bottom of the top frame (35) and the base (33), one end of the torsion spring (36) is connected to the base (33), and the other end is connected to the top frame (35), which is used to provide a restoring force after the top frame (35) rotates. One end of the pull rope (37) is connected to the bottom of the top frame (35), and the other end is connected to the end of the rotating shaft (32).

4. The patellar exercise device for adjuvant treatment of knee osteoarthritis according to claim 3, characterized in that, It also includes an adjustment mechanism (4), which includes a mounting plate (41), a winding double rod (42), a throttle (43), a positioning rod (44), and an elastic element I (45). The mounting plate (41) is connected to the upper and lower ends of the back side of the plate sleeve (11). The winding double rod (42) is rotatably connected between the mounting plates (41). The upper and lower ends of the winding double rod (42) are respectively connected to the throttle (43). Two positioning rods (44) are connected to the throttle (43). Two positioning holes (411) are opened on the mounting plate (41). The positioning rod (44) is limited to the positioning hole (411). The elastic element I (45) is sleeved on the positioning rod (44). One end of the elastic element I (45) is connected to the throttle (43), and the other end is connected to the positioning rod (44). An opening (421) is opened on the winding double rod (42) for the elastic band (1) to pass through.

5. A patellar exercise device for adjuvant treatment of knee osteoarthritis according to claim 4, characterized in that, It also includes an auxiliary treatment device (5), which includes a power supply (51), wires (52), patches (53) and a placement frame (54). The power supply (51) is installed on the upper and lower parts of the mounting frame (13). Multiple wires (52) are led out from the power supply (51). The other end of the wires (52) is connected to the patches (53). The placement frame (54) is connected to the upper and lower parts of the mounting frame (13). The placement frame (54) is provided with a flat groove, and the patches (53) can be placed on the placement frame (54).

6. A patellar exercise device for adjunctive treatment of knee osteoarthritis according to claim 5, characterized in that, It also includes a connecting plate (6) and a tightening screw (61). The connecting plate (6) is connected to the clamping plate (12), and the tightening screw (61) is threadedly connected to the connecting plate (6), and the end of the tightening screw (61) is pressed into the mounting bracket (13).

7. A patellar exercise device for adjunctive treatment of knee osteoarthritis according to claim 6, characterized in that, It also includes a pin (7) and an elastic element II (71). Multiple positioning grooves (311) are opened on both sides of the connecting seat (31), and multiple through holes (341) are opened on the connecting frame (34). The pin (7) is slidably connected in the positioning groove (311) of the connecting seat (31) and the through hole (341) of the connecting frame (34). The two ends of the rotating shaft (32) are fitted with elastic elements II (71).

8. A patellar exercise device for adjunctive treatment of knee osteoarthritis according to claim 7, characterized in that, It also includes a gasket (26) and a soft sleeve (351). The end of the movable clamp (25) that is rotatably connected to the lead screw (23) is connected to the gasket (26), and the soft sleeve (351) is fitted on the top frame (35).

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