Rehabilitation training mechanism for flexion and extension of ankle joint

Abstract

The rehabilitation training mechanism comprises a lower ankle fixing plate and an upper ankle fixing plate which are rotationally connected, a lower ankle bandage is arranged on the upper surface of the lower ankle fixing plate, an upper ankle bandage is arranged on the front side of the upper ankle fixing plate, and the lower ankle bandage and the upper ankle bandage are connected through an electric telescopic device; the electric telescopic device comprises an electric telescopic base, a motor, a gear and two racks, the two racks are arranged on the two sides of the gear respectively and meshed with the gear respectively, the two racks are parallel to each other and installed on the electric telescopic base in a sliding mode respectively, and connecting pieces of the two racks are detachably and rotationally connected with the under-ankle bandage and the above-ankle bandage respectively. The motor drives the gear to rotate, the gear drives the two racks to linearly move in the opposite direction, and therefore the angle between the upper ankle fixing plate and the lower ankle fixing plate is adjusted. Compared with the prior art, the ankle joint training device has the advantages that the ankle joint of a patient with injured lower limbs can be effectively trained.

Description

Technical Field

[0001] This utility model relates to the technical field of human skeletal rehabilitation training devices, and in particular to a rehabilitation training mechanism for ankle joint flexion and extension. Background Technology

[0002] my country has a large number of people with lower limb injuries and disabilities, and the number is increasing every year. Currently, my country has limb joint rehabilitation training machines, but there is a serious imbalance between supply and demand. Moreover, most of the existing limb joint rehabilitation training machines are expensive, bulky, and require the wearer to be accompanied by an able-bodied person throughout the process.

[0003] Patients with fractures of the thigh or lower leg require rehabilitation training for each joint to prevent the decline of basic functions. Due to the distance from the ankle joint and the pain in the leg itself, patients often find it difficult to apply external force to the ankle during rehabilitation. This restricts the dorsiflexion and plantarflexion angles of the ankle joint during rehabilitation, and may even lead to joint stiffness. In severe cases, a second surgery, such as a release procedure, may be necessary. Furthermore, poor blood circulation after a lower limb injury makes the affected limb prone to deep vein thrombosis. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an ankle joint flexion and extension rehabilitation training device, so as to effectively train the ankle joint of patients with lower limb injuries, prevent ankle joint stiffness, and prevent venous thrombosis.

[0005] This utility model is achieved through the following technical solution:

[0006] An ankle joint flexion and extension rehabilitation training mechanism includes a lower ankle fixation plate and a higher ankle fixation plate. The rear end of the lower ankle fixation plate is rotatably connected to the bottom end of the higher ankle fixation plate. The upper surface of the lower ankle fixation plate is provided with a lower ankle strap, and the front side of the higher ankle fixation plate is provided with a higher ankle strap. The lower ankle strap and the higher ankle strap are connected by an electric telescopic device.

[0007] The electric telescopic device includes an electric telescopic base, a motor, a gear, and two racks. The motor is mounted on the electric telescopic base, and the gear is coaxially and fixedly connected to the output shaft of the motor. The two racks are arranged on both sides of the gear and mesh with it respectively. The two racks are parallel to each other and are slidably mounted on the electric telescopic base. Connectors are provided at different ends of the two racks along their length. The connectors of the two racks are detachably and rotatably connected to the lower ankle strap and the upper ankle strap respectively. The motor drives the gear to rotate, and the gear drives the two racks to move linearly in opposite directions, thereby adjusting the angle between the upper ankle fixation plate and the lower ankle fixation plate.

[0008] As a preferred embodiment of the above-mentioned ankle flexion and extension rehabilitation training mechanism, the electric telescopic seat includes an inclined telescopic base plate, and two symmetrical pressure plates are fixedly connected to the bottom surface of the telescopic base plate. The two pressure plates form two sliding grooves with the bottom surface of the telescopic base plate, and two racks are placed in the two sliding grooves respectively. The linear movement direction of the two racks is guided by the two sliding grooves.

[0009] As a preferred embodiment of the above-mentioned ankle flexion and extension rehabilitation training mechanism, each of the racks has a limiting groove, which is an oblong groove extending along the length of the rack. Each pressure plate is fixedly connected with a limiting bolt, and the limiting bolts of the two pressure plates correspond to the limiting grooves of the two racks respectively. The shank of the limiting bolt can slide back and forth along the length of the corresponding limiting groove.

[0010] As a preferred embodiment of the above-mentioned ankle flexion and extension rehabilitation training mechanism, the connecting members of the two racks are respectively hinged to the lower ankle strap and the upper ankle strap via the second hinge shaft.

[0011] As a preferred embodiment of the above-mentioned ankle joint flexion and extension rehabilitation training mechanism, the rear end of the lower ankle fixation plate and the bottom end of the upper ankle fixation plate are rotatably connected by two left and right connecting units. Each connecting unit includes a fixed hinge and a movable hinge that are hinged together by a first hinge axis. The front end of the fixed hinge is fixed to the rear end of the lower ankle fixation plate, and the upper end of the movable hinge is fixed to the bottom end of the upper ankle fixation plate.

[0012] As a preferred embodiment of the above-mentioned ankle joint flexion and extension rehabilitation training mechanism, the upper surface of the ankle fixation plate is provided with two ankle straps arranged in a front-to-back manner, the ankle strap located on the front side is the first ankle strap, the front side of the ankle fixation plate is provided with two ankle straps arranged in a vertical manner, the upper ankle strap is the first ankle strap, and the connecting members of the two racks are rotatably connected to the first ankle strap and the first ankle strap respectively.

[0013] This invention has the following advantages over the prior art:

[0014] This utility model provides an ankle joint flexion and extension rehabilitation training mechanism, which includes a lower ankle fixation plate and an upper ankle fixation plate rotatably connected. An electric telescopic device is installed between the straps of the lower ankle fixation plate and the upper ankle fixation plate. The motor of the electric telescopic device enables automatic extension and retraction, thereby causing the straps at both ends to rotate the lower ankle fixation plate and the upper ankle fixation plate. This allows control of the angle between the two plates, thereby enabling the patient to perform dorsiflexion and plantarflexion movements of the ankle joint, effectively preventing ankle stiffness and venous thrombosis. Furthermore, this rehabilitation training mechanism has a simple structure, is lightweight, easy to manufacture, low in cost, and convenient and quick to operate. After setting the parameters, the patient can exercise independently without the need for constant supervision. In addition, its electric telescopic device adopts a transmission form of gear and two racks. The motor drives the gear to rotate, which realizes the linear movement of the two racks in opposite directions. Compared with the unidirectional motion transmission form, this bidirectional motion transmission form is more advantageous. It can achieve large displacement output with a small stroke, and the bidirectional output allows the patient's foot and lower leg to move at the same time, which improves the stability of the output and the effectiveness of the patient's rehabilitation training. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the electric telescopic device of this utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the electric telescopic device of this utility model after removing one of the pressure plates.

[0018] The following numbers are labeled in the diagram: 1. Infraanole fixation plate; 2. Superioranole fixation plate; 3. First hinge shaft; 4. Fixed hinge; 5. Movable hinge; 6. Infraanole strap; 7. Superioranole strap; 8. Electric telescopic device; 9. Motor; 10. Gear; 11. Rack; 12. Connector; 13. Second hinge shaft; 14. Hinge seat; 15. Telescopic base plate; 16. Pressure plate; 17. Slide groove; 18. Limiting groove; 19. Limiting bolt. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. These embodiments are implemented based on the technical solution of this utility model and provide detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the following embodiments.

[0020] See Figures 1 to 3This embodiment discloses a rehabilitation training mechanism for ankle flexion and extension, including a lower ankle fixation plate 1 and a higher ankle fixation plate 2, with the rear end of the lower ankle fixation plate 1 rotatably connected to the bottom end of the higher ankle fixation plate 2. In this embodiment, the rear end of the lower ankle fixation plate 1 and the bottom end of the higher ankle fixation plate 2 are rotatably connected by two left and right connecting units. Each connecting unit includes a fixed hinge 4 and a movable hinge 5 hinged together by a first hinge shaft 3. The front end of the fixed hinge 4 is fixed to the rear end of the lower ankle fixation plate 1, and the upper end of the movable hinge 5 is fixed to the bottom end of the higher ankle fixation plate 2.

[0021] Ankle fixation plate 1 has an ankle strap 6 on its upper surface. One end of the ankle strap 6 is a fixed end and the other end is a movable end. The fixed end of the ankle strap 6 is fixed to the ankle fixation plate 1, and the movable end of the ankle strap 6 is movably connected to the ankle fixation plate 1. For example, a perforation can be made in the ankle fixation plate 1, and the movable end of the ankle strap 6 passes through the perforation in the ankle fixation plate 1 and is tied tightly to the ankle fixation plate 1 to fix the patient's foot. Ankle fixation plate 2 has an ankle strap 7 on its front side. The connection method between the ankle strap 7 and the ankle fixation plate 2 is the same as the connection method between the ankle strap 6 and the ankle fixation plate 1.

[0022] The lower ankle strap 6 and the upper ankle strap 7 are connected by an electric telescopic device 8. The electric telescopic device 8 includes an electric telescopic base, a motor 9, a gear 10, and two racks 11. The motor 9 is mounted on the electric telescopic base. The gear 10 is coaxially and fixedly connected to the output shaft of the motor 9. The two racks 11 are arranged on both sides of the gear 10 and mesh with the gear 10 respectively. The two racks 11 are parallel to each other and are slidably mounted on the electric telescopic base. Connectors 12 are provided at different ends along the length direction of the two racks 11. The connectors 12 are loops with holes. The connectors 12 of the two racks 11 are detachably rotatably connected to the lower ankle strap 6 and the upper ankle strap 7 respectively. In this embodiment, the connectors 12 of the two racks 11 are hinged to the lower ankle strap 6 and the upper ankle strap 7 respectively through the second hinge shaft 13. The lower ankle strap 6 and the upper ankle strap 7 are respectively fixed with hinge seats 14. The second hinge shaft 13 passes through the connectors 12 of the racks 11 and the corresponding hinge seats 14 in sequence to realize the detachable hinge connection between the two. Motor 9 drives gear 10 to rotate, which in turn drives two racks 11 to move linearly in opposite directions, thereby adjusting the angle between the upper ankle fixation plate 2 and the lower ankle fixation plate 1. The direction of movement of the two racks 11 can be controlled by rotating motor 9 in both directions. When motor 9 rotates forward, the connecting parts 12 of the two racks 11 move away from each other, extending the electric telescopic device 8; when motor 9 rotates in reverse, the connecting parts 12 of the two racks 11 move closer together, retracting the electric telescopic device 8.

[0023] In this embodiment, the upper surface of the ankle fixation plate 1 is provided with two ankle straps 6 arranged in a front-to-back manner. The ankle strap 6 located on the front side is the first ankle strap 6. The front side of the ankle fixation plate 2 is provided with two ankle straps 7 arranged vertically. The ankle strap 7 located on the upper side is the first ankle strap 7. The connecting member 12 of the two racks 11 is rotatably connected to the first ankle strap 6 and the first ankle strap 7 respectively.

[0024] The electric telescopic seat includes an inclined telescopic base plate 15. Two symmetrical pressure plates 16 are fixedly connected to the bottom surface of the telescopic base plate 15. The two pressure plates 16 are fixedly connected to the telescopic base plate 15 by screws. Two grooves 17 are formed between the two pressure plates 16 and the bottom surface of the telescopic base plate 15. Two racks 11 are placed in the two grooves 17 respectively, and the two grooves 17 guide the linear movement direction of the two racks 11.

[0025] Each rack 11 has a limiting groove 18, which is an oblong groove extending along the length of the rack 11. Each pressure plate 16 is fixedly connected with a limiting bolt 19. The limiting bolts 19 of the two pressure plates 16 correspond to the limiting grooves 18 of the two racks 11 respectively. The rod of the limiting bolt 19 can slide back and forth along the length of the corresponding limiting groove 18. Through the cooperation of the limiting groove 18 and the limiting bolt 19, the travel of the rack 11 is limited.

[0026] Before use, first remove the second hinge shaft 13 connecting the hinge seat 14 on the ankle strap 6 to the lower end of the electric telescopic device 8. Remove the lower end of the electric telescopic device 8 from the ankle strap 6 and lift it upwards. Untie the movable ends of the two ankle straps 6. After placing the patient's foot on the ankle fixation plate 1, tighten the movable ends of the two ankle straps 6 onto the ankle fixation plate 1 to fix the patient's foot. Then, untie the movable ends of the two upper ankle straps 7, ensuring the posterior side of the lower end of the patient's lower leg is flush against the front side of the upper ankle fixation plate 2. Tighten the movable ends of the two upper ankle straps 7 onto the upper ankle fixation plate 2 to fix the lower end of the patient's lower leg. Finally, install the lower end of the electric telescopic device 8 onto the hinge seat 14 on the ankle strap 6, thus completing the wearing of the rehabilitation training device.

[0027] Start motor 9, which drives gear 10 to rotate. Gear 10 drives two meshing racks 11 to move in opposite directions. Motor 9 runs in both forward and reverse directions alternately, with the interval set as needed. When motor 9 rotates forward, the electric telescopic device 8 extends, causing the patient's ankle joint to perform plantar flexion with the dorsiflexion pointing downwards. When motor 9 rotates in reverse, the electric telescopic device 8 retracts, causing the patient's ankle joint to perform dorsiflexion with the dorsiflexion pointing upwards. This cycle repeats, thus enabling rehabilitation training movements of dorsiflexion and plantar flexion of the ankle joint.

[0028] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rehabilitation training mechanism for ankle flexion and extension, comprising a lower ankle fixation plate (1) and a higher ankle fixation plate (2), wherein the rear end of the lower ankle fixation plate (1) is rotatably connected to the bottom end of the higher ankle fixation plate (2), characterized in that: The ankle fixation plate (1) has an ankle strap (6) on its upper surface and an ankle strap (7) on the front side of the ankle fixation plate (2). The ankle strap (6) and the ankle strap (7) are connected by an electric telescopic device (8). The electric telescopic device (8) includes an electric telescopic base, a motor (9), a gear (10), and two racks (11). The motor (9) is mounted on the electric telescopic base. The gear (10) is coaxially and fixedly connected to the output shaft of the motor (9). The two racks (11) are arranged on both sides of the gear (10) and mesh with the gear (10) respectively. The two racks (11) are parallel to each other and are slidably mounted on the electric telescopic base. Connectors (12) are provided at different ends of the two racks (11) along the length direction. The connectors (12) of the two racks (11) are detachably and rotatably connected to the lower ankle strap (6) and the upper ankle strap (7) respectively. The motor (9) drives the gear (10) to rotate, and the gear (10) drives the two racks (11) to move in opposite directions in a straight line, thereby realizing the adjustment of the angle between the upper ankle fixation plate (2) and the lower ankle fixation plate (1).

2. The ankle joint flexion and extension rehabilitation training mechanism as described in claim 1, characterized in that: The electric telescopic seat includes an inclined telescopic base plate (15). Two symmetrical pressure plates (16) are fixedly connected to the bottom surface of the telescopic base plate (15). The two pressure plates (16) form two sliding grooves (17) between themselves and the bottom surface of the telescopic base plate (15). Two racks (11) are placed in the two sliding grooves (17) respectively, and the linear movement direction of the two racks (11) is guided by the two sliding grooves (17).

3. The ankle joint flexion and extension rehabilitation training mechanism as described in claim 2, characterized in that: Each rack (11) has a limiting groove (18), which is an oblong groove extending along the length of the rack (11). Each pressure plate (16) is fixedly connected with a limiting bolt (19). The limiting bolts (19) of the two pressure plates (16) correspond to the limiting grooves (18) of the two racks (11) respectively. The rod of the limiting bolt (19) can slide back and forth along the length of the corresponding limiting groove (18).

4. The ankle joint flexion and extension rehabilitation training mechanism as described in claim 1, characterized in that: The connecting parts (12) of the two racks (11) are respectively hinged to the lower ankle strap (6) and the upper ankle strap (7) via the second hinge shaft (13).

5. The ankle joint flexion and extension rehabilitation training mechanism as described in claim 1, characterized in that: The rear end of the ankle fixation plate (1) and the bottom end of the ankle fixation plate (2) are rotatably connected by two connecting units on the left and right. Each connecting unit includes a fixed hinge (4) and a movable hinge (5) that are hinged together by a first hinge shaft (3). The front end of the fixed hinge (4) is fixed to the rear end of the ankle fixation plate (1), and the upper end of the movable hinge (5) is fixed to the bottom end of the ankle fixation plate (2).

6. The ankle joint flexion and extension rehabilitation training mechanism as described in claim 1, characterized in that: The upper surface of the ankle fixation plate (1) is provided with two ankle straps (6) arranged in front and back. The ankle strap (6) located on the front side is the first ankle strap (6). The front side of the ankle fixation plate (2) is provided with two ankle straps (7) arranged in front and back. The ankle strap (7) located on the top side is the first ankle strap (7). The connector (12) of the two racks (11) is rotatably connected to the first ankle strap (6) and the first ankle strap (7) respectively.

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