A lower limb rehabilitation exercise device for rheumatoid arthritis

Abstract

The utility model relates to exercise device technical field and disclose a kind of rheumatoid arthritis lower limb rehabilitation exercise device, including base and seat, the right side of the top of base is provided with mounting groove, the inside of mounting groove is provided with the slider that one end is attached with its inner wall left side and another end extends to the top of base, the top of slider is provided with trapezoidal block, the front and back both ends of trapezoidal block left side are evenly provided with footrest groove.The rheumatoid arthritis lower limb rehabilitation exercise device, by starting first servo motor to drive connecting plate to move left, to gradually compress two springs, the elastic force that slider receives then will be more and more big, to adjust the force required for exercise, to effectively adapt to different rehabilitation stage patient for use, while also can satisfy a patient from small force to big force Slowly recovery exercise, whole structure adaptability is wide, and practicality is strong, to facilitate use.

Description

Technical Field

[0001] This utility model relates to the field of exercise device technology, specifically a lower limb rehabilitation exercise device for rheumatoid arthritis. Background Technology

[0002] Rheumatoid arthritis is a chronic inflammatory autoimmune disease driven by inflammation, resulting in joint dysfunction, swelling, pain, and stiffness. In severe cases, it can lead to disability and increase the risk of extra-articular diseases. Rehabilitation therapy is an adjunct to drug treatment. Exercise therapy can reduce inflammation, improve joint function, reduce the risk of cardiovascular disease, and improve mental health. When joint swelling and pain have largely subsided and the condition is stable, lower limb rehabilitation devices are often used to help patients perform knee extension exercises to promote lower limb recovery. However, existing lower limb rehabilitation devices often have fixed force settings, which patients at different recovery stages often cannot adapt to, thus hindering their recovery and making them unsuitable for use. Therefore, a lower limb rehabilitation device for rheumatoid arthritis is proposed. Utility Model Content

[0003] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a lower limb rehabilitation exercise device for rheumatoid arthritis, which has the advantages of adjustable force. It solves the problem that in the actual use of existing lower limb rehabilitation exercise devices, the force of the device is usually fixed, so patients at different stages of recovery often cannot adapt to the force of the device, which will hinder the patient's recovery and make it unsuitable for use.

[0004] (II) Technical Solution To achieve the aforementioned adjustable force, this utility model provides the following technical solution: a lower limb rehabilitation exercise device for rheumatoid arthritis, comprising a base and a seat. A mounting groove is provided on the top right side of the base. Inside the mounting groove is a slider, one end of which is attached to the left side of its inner wall and the other end extends to the top of the base. A trapezoidal block is provided on the top of the slider. Foot pedal grooves are provided at both the front and rear ends of the left side of the trapezoidal block. A connecting plate is provided between the front and rear sides of the inner wall of the mounting groove, located on the right side of the slider. Two springs, symmetrically distributed front and rear, are provided between the slider and the connecting plate. An installation cavity is provided inside the base below the mounting groove. A first threaded rod, one end of which extends to the right side of the base, is provided on the left side of the inner wall of the installation cavity. A traction block is provided on the outer side of the first threaded rod, one end of which is movably connected to the bottom wall of the installation cavity and the other end extends into the mounting groove and is fixedly connected to the right side of the connecting plate. A first driving assembly, one end of which is fixedly connected to the outer side of the first threaded rod, is provided on the right side of the base. The top of the base... A sliding groove is provided on the left side of the mounting slot. A second threaded rod is provided on the right side of the inner wall of the sliding groove, with one end extending to the left side of the base. A movable block is provided on the left side of the inner wall of the sliding groove, with one end threaded to the outer side of the second threaded rod and the other end extending to the top of the base. A second drive assembly is provided on the left side of the top of the base, with one end fixedly connected to the outer side of the second threaded rod. A rectangular groove is provided on the top of the movable block, above the second threaded rod. A third threaded rod is provided on both the left and right sides of the bottom wall of the rectangular groove. A support block is provided inside the rectangular groove, with one end threaded to the outer side of the two third threaded rods and the other end extending to the top of the movable block. The seat is located on the top of the support block. Limiting grooves provided on the movable block are connected to both the left and right sides of the inner wall of the rectangular groove. A limiting block is provided at the bottom of each of the two limiting grooves, with one end fixedly connected to the left and right sides of the support block respectively. A third drive assembly is provided on the bottom wall of the rectangular groove, with one end fixedly connected to the outer side of the left third threaded rod and the other end fixedly connected to the outer side of the right third threaded rod.

[0005] Preferably, the first drive assembly includes a first servo motor, the first servo motor is fixedly installed on the right side of the base above the first threaded rod, the connecting block is fixedly installed on the right side of the base below the first threaded rod, the output shaft of the first servo motor is fixedly installed with a worm gear located behind the first threaded rod and movably connected at one end to the top of the connecting block, and a worm wheel located on the right side of the base and meshing with the worm gear at one end is fixedly installed on the outer side of the first threaded rod.

[0006] Preferably, the second drive assembly includes a second servo motor, the second servo motor is fixedly mounted on the top of the base and located on the left side of the slide groove, the output shaft of the second servo motor is fixedly mounted with a drive gear, and the outer side of the second threaded rod is fixedly mounted with a driven gear located on the left side of the base and one end of which meshes with the drive gear.

[0007] Preferably, the third drive assembly includes a dual-axis servo motor. The dual-axis servo motor is fixedly installed on the inner bottom wall of the rectangular groove between the two third threaded rods. Drive bevel gears are fixedly installed on the left and right output shafts of the dual-axis servo motor. Driven bevel gears are fixedly installed on the outer sides of the two third threaded rods, located below the support block and with one end meshing with the two drive bevel gears respectively.

[0008] Preferably, a first bearing is fixedly installed on the left side of the inner wall of the mounting cavity, and the first threaded rod is rotatably connected to the left side of the inner wall of the mounting cavity through the first bearing. A first threaded hole adapted to the first threaded rod is opened at the bottom left side of the traction block. A rectangular strip hole opened on the base and adapted to the moving trajectory of the traction block is connected between the inner top wall of the mounting cavity and the inner bottom wall of the mounting groove.

[0009] Preferably, a second bearing is fixedly installed on the top of the connecting block, and the worm gear is rotatably connected to the top of the connecting block through the second bearing.

[0010] (III) Beneficial Effects Compared with the prior art, this utility model provides a lower limb rehabilitation exercise device for rheumatoid arthritis, which has the following beneficial effects: 1. This type of lower limb rehabilitation exercise device for rheumatoid arthritis uses a first servo motor to drive a worm gear to rotate, which in turn drives a first threaded rod to rotate via a worm wheel. During rotation, the first threaded rod moves the traction block and connecting plate to the left, gradually compressing the two springs. This increases the elastic force on the slider, thus adjusting the force required for exercise. This allows the device to effectively adapt to patients at different rehabilitation stages and also meets the needs of a patient for slow, gradual recovery exercises from small to large forces. The overall structure is highly adaptable and practical, making it convenient to use.

[0011] 2. This type of lower limb rehabilitation exercise device for rheumatoid arthritis utilizes a second servo motor and a dual-axis servo motor. The second servo motor drives a drive gear to rotate, which in turn drives a second threaded rod to rotate via a driven gear. This causes the moving block and the seat to move to the right. The dual-axis servo motor drives two drive bevel gears to rotate, which in turn drive two third threaded rods to rotate via two driven bevel gears. This causes the support block and the seat to move upward. By adjusting the position of the seat, it is convenient for patients of different heights to use, further improving its applicability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2This is a partial left-side view of the trapezoidal block of this utility model; Figure 3 This is a partial top sectional view of the mounting groove of this utility model; Figure 4 This utility model Figure 1 Enlarged view of point A in the middle; Figure 5 This utility model Figure 1 Enlarged view of section B in the middle.

[0013] In the diagram: 1. Base, 2. Mounting slot, 3. Slider, 4. Trapezoidal block, 5. Foot pedal slot, 6. Connecting plate, 7. Spring, 8. Mounting cavity, 9. First threaded rod, 10. Traction block, 11. First drive assembly, 111. First servo motor, 112. Connecting block, 113. Worm gear, 114. Worm wheel, 12. Slide groove, 13. Second threaded rod, 14. Moving block, 15. Second drive assembly, 151. Second servo motor, 152. Drive gear, 153. Driven gear, 16. Rectangular slot, 17. Third threaded rod, 18. Support block, 19. Seat, 20. Limiting slot, 21. Limiting block, 22. Third drive assembly, 221. Dual-axis servo motor, 222. Drive bevel gear, 223. Driven bevel gear. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-5 This utility model provides a technical solution: a lower limb rehabilitation exercise device for rheumatoid arthritis, including a base 1 and a seat 19. The top right side of the base 1 has an installation groove 2. A slider 3 is movably installed inside the installation groove 2, with one end attached to the left side of its inner wall and the other end extending to the top of the base 1. A trapezoidal block 4 is fixedly installed on the top of the slider 3. Foot pedal grooves 5 are opened at both the front and rear ends of the left side of the trapezoidal block 4. A connecting plate 6 located on the right side of the slider 3 is movably installed between the front and rear sides of the inner wall of the installation groove 2. Two springs 7 are fixedly installed between the slider 3 and the connecting plate 6 and are symmetrically distributed front and back.

[0016] The base 1 has an internal mounting cavity 8 located below the mounting groove 2. A first threaded rod 9, extending to the right side of the base 1, is movably mounted on the left side of the inner wall of the mounting cavity 8. The lead angle of the first threaded rod 9 is small. One end of the first threaded rod 9 is movably connected to the bottom wall of the inner wall of the mounting cavity 8, and the other end extends into the mounting groove 2 and is fixedly connected to the right side of the connecting plate 6. A first bearing is fixedly mounted on the left side of the inner wall of the mounting cavity 8. The first threaded rod 9 is rotatably connected to the left side of the inner wall of the mounting cavity 8 through the first bearing. A first threaded hole adapted to the first threaded rod 9 is opened at the bottom left side of the traction block 10. A rectangular strip hole opened on the base 1 and adapted to the movement trajectory of the traction block 10 is connected between the inner top wall of the mounting cavity 8 and the inner bottom wall of the mounting groove 2.

[0017] A first drive assembly 11 is fixedly installed on the right side of the base 1, with one end fixedly connected to the outside of the first threaded rod 9. The first drive assembly 11 includes a first servo motor 111. The first servo motor 111, located above the first threaded rod 9, is fixedly installed on the right side of the base 1. The model of the first servo motor 111 can be MR-J2S-10A. A connecting block 112, located below the first threaded rod 9, is fixedly installed on the right side of the base 1. A worm gear 113, located behind the first threaded rod 9 and movably connected at one end to the top of the connecting block 112, is fixedly installed on the output shaft of the first servo motor 111. A second bearing is fixedly installed on the top of the connecting block 112. The worm gear 113 is rotatably connected to the top of the connecting block 112 through the second bearing. A worm wheel 114, located on the right side of the base 1 and meshing with the worm gear 113, is fixedly installed on the outside of the first threaded rod 9.

[0018] The top of the base 1 has a slide groove 12 located on the left side of the mounting groove 2. A second threaded rod 13 extending to the left side of the base 1 is movably installed on the right side of the inner wall of the slide groove 12. The lead angle of the second threaded rod 13 is small. A third bearing is fixedly installed on the right side of the inner wall of the slide groove 12. The second threaded rod 13 is rotatably connected to the right side of the inner wall of the slide groove 12 through the third bearing. A movable block 14 is movably installed on the left side of the inside of the slide groove 12. One end is threadedly connected to the outside of the second threaded rod 13 and the other end extends to the top of the base 1. A second threaded hole adapted to the second threaded rod 13 is opened at the bottom left side of the movable block 14.

[0019] A second drive assembly 15 is fixedly installed on the top left side of the base 1, with one end fixedly connected to the outside of the second threaded rod 13. The second drive assembly 15 includes a second servo motor 151. The second servo motor 151 located on the left side of the slide groove 12 is fixedly installed on the top of the base 1. The model of the second servo motor 151 can be IHSS57-36-20. A drive gear 152 is fixedly installed on the output shaft of the second servo motor 151. A driven gear 153 located on the left side of the base 1 and meshing with the drive gear 152 is fixedly installed on the outside of the second threaded rod 13.

[0020] The top of the movable block 14 has a rectangular groove 16 located above the second threaded rod 13. The left and right sides of the bottom wall of the rectangular groove 16 are movably installed with third threaded rods 17. The threads of the two third threaded rods 17 have opposite directions and the lead angles of the two third threaded rods 17 are extremely small. The left and right sides of the bottom wall of the rectangular groove 16 are fixedly installed with fourth bearings. The third threaded rods 17 are rotatably connected to the bottom wall of the rectangular groove 16 through the fourth bearings. A support block 18 is movably installed inside the rectangular groove 16, with one end threaded to the outside of the two third threaded rods 17 and the other end extending to the top of the movable block 14. The bottom left and right sides of the support block 18 have threaded grooves that are adapted to the two third threaded rods 17 respectively. The seat 19 is fixedly installed on the top of the support block 18. The left and right sides of the inner wall of the rectangular groove 16 are connected to the limiting grooves 20 opened on the movable block 14. The bottom of the two limiting grooves 20 are movably installed with a limiting block 21, one end of which is fixedly connected to the left and right sides of the support block 18 respectively.

[0021] A third drive assembly 22 is fixedly installed on the inner bottom wall of the rectangular groove 16. One end of the third drive assembly 22 is fixedly connected to the outer side of the left third threaded rod 17, and the other end is fixedly connected to the outer side of the right third threaded rod 17. The third drive assembly 22 includes a dual-axis servo motor 221. The dual-axis servo motor 221 located between the two third threaded rods 17 is fixedly installed on the inner bottom wall of the rectangular groove 16. The model of the dual-axis servo motor 221 can be HDMF2089050. Drive bevel gears 222 are fixedly installed on the left and right output shafts of the dual-axis servo motor 221. Drive bevel gears 223 located below the support block 18 and meshing with the two drive bevel gears 222 at one end are fixedly installed on the outer side of the two third threaded rods 17.

[0022] All electrical components mentioned in this article are electrically connected to the controller and power supply. The control method of this utility model is controlled by the controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Therefore, this utility model will not explain the control method and circuit connection in detail.

[0023] In use, the patient sits on the seat 19 and places both feet inside the two footrest slots 5. When adjustment of the seat 19 is needed, the second servo motor 151 and the dual-axis servo motor 221 are activated. The second servo motor 151 drives the drive gear 152 to rotate, which in turn drives the second threaded rod 13 to rotate via the driven gear 153, thus moving the moving block 14 and the seat 19 to the right. The dual-axis servo motor 221 drives the two drive bevel gears 222 to rotate, which in turn drives the two third threaded rods 17 to rotate via the two driven bevel gears 223, thus moving the support block 18 and the seat 19 upwards. By adjusting the position of the seat 19, the patient can achieve a comfortable sitting posture and then perform knee extension exercises. When the knee joint is straightened, the trapezoidal block 4 and the slider 3 move to the right, compressing the two springs 7. The force of the two springs 7 applies force to the patient's knee joint, thus performing rehabilitation exercises. When the force required for the exercise needs to be adjusted, the first servo motor 111 is activated to rotate the worm gear 113, which in turn rotates the first threaded rod 9 via the worm wheel 114. During the rotation of the first threaded rod 9, the traction block 10 and the connecting plate 6 move to the left, gradually compressing the two springs 7. At this time, the elastic force on the slider 3 increases, thereby adjusting the force required for the exercise. This allows for effective adaptation to patients at different rehabilitation stages and also meets the needs of a patient for slow recovery exercises from small to large forces, ultimately making it convenient to use.

[0024] In summary, this lower limb rehabilitation exercise device for rheumatoid arthritis rotates by activating the first servo motor 111, which drives the worm gear 113 to rotate. This rotation, in turn, drives the first threaded rod 9 to rotate via the worm wheel 114. During rotation, the first threaded rod 9 moves the traction block 10 and connecting plate 6 to the left, gradually compressing the two springs 7. This increases the elastic force on the slider 3, thus adjusting the force required for exercise. This effectively adapts to patients at different rehabilitation stages and allows for slow, gradual recovery exercises from small to large forces. The overall structure is highly adaptable and practical, facilitating use. Furthermore, by activating the second servo motor 151 and the dual-axis servo motor 221, the second servo motor 151 drives the traction block 10 and connecting plate 6 to move to the left, gradually compressing the two springs 7. This results in increasing elastic force on the slider 3, adjusting the force required for exercise. This allows the device to effectively adapt to patients at different rehabilitation stages and also meets the needs of a patient undergoing slow, gradual recovery exercises. The rotating gear 152 drives the second threaded rod 13 to rotate via the driven gear 153, thereby moving the moving block 14 and seat 19 to the right. The dual-axis servo motor 221 drives the two driving bevel gears 222 to rotate, which in turn drives the two third threaded rods 17 to rotate via the two driven bevel gears 223, thereby moving the support block 18 and seat 19 upward. By adjusting the position of the seat 19, it is convenient for patients of different heights to use, further improving its applicability. This solves the problem that in the actual use of existing lower limb rehabilitation exercise devices, the force of the device is usually fixed, so patients at different recovery stages often cannot adapt to the force of the device, which will hinder the patient's recovery and make it unsuitable for use.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lower limb rehabilitation exercise device for rheumatoid arthritis, comprising a base (1) and a seat (19), wherein a mounting groove (2) is provided on the top right side of the base (1), and a slider (3) is provided inside the mounting groove (2), one end of which is attached to the left side of its inner wall and the other end of which extends to the top of the base (1), a trapezoidal block (4) is provided on the top of the slider (3), and foot pedal grooves (5) are provided at both the front and rear ends of the left side of the trapezoidal block (4), a connecting plate (6) located on the right side of the slider (3) is provided between the front and rear sides of the inner wall of the mounting groove (2), and two springs (7) symmetrically distributed front and rear are provided between the slider (3) and the connecting plate (6), characterized in that: The base (1) has an installation cavity (8) located below the installation groove (2) inside. A first threaded rod (9) extending to the right side of the base (1) is provided on the left side of the inner wall of the installation cavity (8). A traction block (10) is provided on the outer side of the first threaded rod (9), with one end movably connected to the bottom wall of the installation cavity (8) and the other end extending into the installation groove (2) and fixedly connected to the right side of the connecting plate (6). A first drive assembly (11) fixedly connected to the outer side of the first threaded rod (9) is provided on the right side of the base (1). A slide groove (12) located on the left side of the installation groove (2) is provided on the top of the base (1). A second threaded rod (13) extending to the left side of the base (1) is provided on the right side of the inner wall of the slide groove (12). A moving block (14) with one end threadedly connected to the outer side of the second threaded rod (13) and the other end extending to the top of the base (1) is provided on the left side of the inner wall of the slide groove (12). A moving block (14) with one end threadedly connected to the outer side of the second threaded rod (13) and the other end extending to the top of the base (1) is provided on the top left side of the base (1). (13) A second drive assembly (15) is fixedly connected to the outside. The top of the moving block (14) is provided with a rectangular groove (16) located above the second threaded rod (13). The bottom wall of the rectangular groove (16) is provided with a third threaded rod (17) on both the left and right sides. The inside of the rectangular groove (16) is provided with a support block (18) with one end threadedly connected to the outside of the two third threaded rods (17) and the other end extending to the top of the moving block (14). The seat (19) is located on the top of the support block (18). The left and right sides of the inner wall of the rectangular groove (16) are connected with a limiting groove (20) provided on the moving block (14). The bottom of the two limiting grooves (20) is provided with a limiting block (21) with one end fixedly connected to the left and right sides of the support block (18). The bottom wall of the rectangular groove (16) is provided with a third drive assembly (22) with one end fixedly connected to the outside of the left third threaded rod (17) and the other end fixedly connected to the outside of the right third threaded rod (17).

2. The lower limb rehabilitation exercise device for rheumatoid arthritis according to claim 1, characterized in that: The first drive assembly (11) includes a first servo motor (111). The first servo motor (111) is fixedly installed on the right side of the base (1) above the first threaded rod (9). The connecting block (112) is fixedly installed on the right side of the base (1) below the first threaded rod (9). The output shaft of the first servo motor (111) is fixedly installed with a worm gear (113) located behind the first threaded rod (9) and movably connected at one end to the top of the connecting block (112). A worm wheel (114) is fixedly installed on the outside of the first threaded rod (9) on the right side of the base (1) and meshes with the worm gear (113) at one end.

3. The lower limb rehabilitation exercise device for rheumatoid arthritis according to claim 1, characterized in that: The second drive assembly (15) includes a second servo motor (151). The second servo motor (151) is fixedly installed on the top of the base (1) on the left side of the slide (12). The output shaft of the second servo motor (151) is fixedly installed with a drive gear (152). The outer side of the second threaded rod (13) is fixedly installed with a driven gear (153) located on the left side of the base (1) and one end of which meshes with the drive gear (152).

4. The lower limb rehabilitation exercise device for rheumatoid arthritis according to claim 1, characterized in that: The third drive assembly (22) includes a dual-axis servo motor (221). The inner bottom wall of the rectangular groove (16) is fixedly installed with a dual-axis servo motor (221) located between two third threaded rods (17). The output shafts on both the left and right sides of the dual-axis servo motor (221) are fixedly installed with drive bevel gears (222). The outer sides of the two third threaded rods (17) are fixedly installed with driven bevel gears (223) located below the support block (18) and with one end meshing with the two drive bevel gears (222).

5. The lower limb rehabilitation exercise device for rheumatoid arthritis according to claim 1, characterized in that: A first bearing is fixedly installed on the left side of the inner wall of the mounting cavity (8). The first threaded rod (9) is rotatably connected to the left side of the inner wall of the mounting cavity (8) through the first bearing. A first threaded hole adapted to the first threaded rod (9) is opened at the bottom left side of the traction block (10). A rectangular strip hole opened on the base (1) and adapted to the movement trajectory of the traction block (10) is connected between the inner top wall of the mounting cavity (8) and the inner bottom wall of the mounting groove (2).

6. The lower limb rehabilitation exercise device for rheumatoid arthritis according to claim 2, characterized in that: A second bearing is fixedly installed on the top of the connecting block (112), and the worm (113) is rotatably connected to the top of the connecting block (112) through the second bearing.

Images