Ankle joint rehabilitation device capable of adjusting leg length

Abstract

The ankle joint rehabilitation device capable of adjusting the leg length comprises a bottom plate, a seat is fixed to the upper end face of the bottom plate, a soft cushion is fixed to the upper end face of the seat, and armrests are symmetrically fixed to the upper end face of the seat; the rotating plate is rotationally connected to the right end of the seat through a columnar shaft, a bidirectional threaded rod is connected to the interior of the rotating plate through a bearing, movable plates are symmetrically arranged on the right side of the rotating plate, and elastic binding bands are fixed to the movable plates. According to the ankle joint rehabilitation device capable of adjusting the leg length, a linked multi-direction rotating mechanism is adopted, multi-direction rotation of the ankle joint of a patient can be achieved, normal movement of the ankle joint of the human body can be simulated, the foot plate position can be adjusted in cooperation with an adjusting mechanism, the use requirements of different patients can be met, and the adaptability of the device is improved; and by matching with the linked foot massage mechanism, the synchronous massage effect on the foot soles of the patient can be realized, the blood circulation of the feet of the patient is accelerated, and the exercise effect of the patient is improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical equipment, and in particular to an ankle joint rehabilitation device capable of adjusting leg length. Background Art

[0002] The ankle joint is one of the weight-bearing joints of the human body and is also the hub of contact between the human body and the ground. It can help the human body complete a series of daily movements. In order to help patients after surgery to perform rehabilitation training, it is necessary to use an ankle joint rehabilitation device to assist in meeting the exercise needs. Existing ankle joint rehabilitation devices, such as an ankle joint rehabilitation device with adjustable leg length, published as CN108836746B, include a basic mounting plate, a linear module mechanism and an ankle joint rehabilitation drive mechanism; the linear module mechanism is arranged on the basic mounting plate, and the output end of the linear module mechanism is connected to the ankle joint rehabilitation drive mechanism, which is used to drive the ankle joint rehabilitation drive mechanism to perform linear motion; The above-mentioned existing ankle rehabilitation device still has certain defects when it is used. During use, due to the different ages of patients, the distance between their legs also has a certain difference. The existing device lacks an adjustment mechanism, which makes it difficult to ensure that the patient's feet fit the device exactly, which in turn affects the normal use of the device. In addition, when exercising, the existing device can only realize vertical ankle rotation, while the human ankle joint can also realize horizontal rotation, which makes it difficult for the device to meet actual exercise needs. In addition, during training, the existing device lacks a massage mechanism, which makes it difficult for the blood in the soles of the patient's feet to circulate quickly, which in turn leads to poor exercise effects and other problems. Therefore, it is necessary to improve the above-mentioned problems to meet actual needs. Summary of the invention

[0003] The purpose of the present invention is to provide an ankle joint rehabilitation device with adjustable leg length to solve the problems raised in the above background technology that it is inconvenient to adjust according to the distance between the patient's legs, it can only rotate in a single direction, making it difficult to meet actual exercise needs, and the lack of a massage mechanism leads to poor exercise effect.

[0004] To achieve the above object, the present invention provides the following technical solution: an ankle joint rehabilitation device capable of adjusting leg length, comprising a base plate, a seat being fixed to the upper end surface of the base plate, a cushion being fixed to the upper end surface of the seat, and an armrest being symmetrically fixed to the upper end surface of the seat; Also includes: A rotating plate is rotatably connected to the right end of the seat through a cylindrical shaft, and a bidirectional threaded rod is connected to a bearing in the rotating plate, and a movable plate is symmetrically arranged on the right side of the rotating plate, and an elastic strap is fixed on the movable plate, and a Velcro is arranged on the elastic strap for connection; A movable frame is arranged on the right side of the movable plate, and a limit rod is symmetrically connected to the movable frame, and a rotatable mounting frame is connected to the movable frame through a columnar shaft, and a motor is fixed in the mounting frame, a driving gear is fixed to the end of the motor output shaft, and the driving gear is arranged on the right side of the mounting frame, and a rotating shaft is connected to the right bearing of the mounting frame, and a take-up wheel is symmetrically fixed on the rotating shaft, and a first pull rope is connected to the take-up wheel, and the first pull rope penetrates the mounting frame to slide, and the other end of the first pull rope is fixed to the movable frame; The footboard is fixed on the rotating shaft, and a baffle is vertically fixed on the upper end surface of the footboard, and a restraining belt is fixed on the upper end surface of the footboard. At the same time, Velcro is fixed on the restraining belt for connection, and massage rollers are connected to the equally spaced bearings on the footboard.

[0005] Preferably, a rotatable electric telescopic rod is connected to the turn plate via a columnar shaft, and the other end of the electric telescopic rod is rotatably connected to the base plate via the columnar shaft to realize adjustment. When the angle of the turn plate is adjusted, the extension effect of the electric telescopic rod and the rotation effect of the electric telescopic rod can make the turn plate rotate around the seat under force, thereby adjusting the angle of the turn plate and then adjusting the angle of the patient's legs, so as to adapt to the patient's usage needs and ensure the comfort of the patient's legs.

[0006] Preferably, the movable plate is further provided with a convex plate and a limit block; A convex plate is fixed on the left end surface of the movable plate, and the convex plate and the groove on the rotating plate are mutually nested for sliding, and the convex plate is mutually connected with the bidirectional threaded rod through a thread; The limit blocks are symmetrically fixed on the movable plate, and the limit blocks are nested in the grooves on the rotating plate and can slide. When using the device, the position of the movable plate needs to be adjusted according to the position of the patient's legs. By rotating the two-way threaded rod and cooperating with the threaded connection between the two-way threaded rod and the convex plate, the convex plates can be forced to move toward each other, thereby driving the movable plate to move toward each other, thereby realizing the position adjustment of the movable plate, which is convenient for fixing the patient's legs, and when the movable plate moves, the sliding guide action between the movable plate and the rotating plate can ensure that the movable plate makes stable linear movement.

[0007] Preferably, sliders are symmetrically fixed on the movable frame, and the sliders are nested in the grooves on the movable plate and can slide up and down. When the height of the footboard is adjusted, the height of the movable frame can be adjusted by pushing the movable frame, thereby adjusting the height of the footboard to accommodate patients with different leg lengths. When the movable frame moves, the sliding action between the sliders and the movable plate can ensure the stability of the movement of the movable frame.

[0008] Preferably, the limit rod is nested with the opening on the movable plate to form a limit mechanism, and a first spring is also fixed on the limit rod, and the other end of the first spring is fixed to the movable frame. At the same time, the limit rod forms an elastic mechanism through the first spring and the movable frame. The limit mechanism is formed by the above mechanism, and the positioning effect on the movable frame can be released by pulling the limit rod, thereby facilitating the adjustment of the height of the movable frame. After the adjustment is completed, the limit rod can be restored to its original position through the elastic action of the first spring. At this time, the limit rod is nested with the opening on the movable plate to realize the limiting effect, thereby ensuring the stability of the movable frame after adjustment.

[0009] Preferably, a torsion spring is further provided between the mounting frame and the movable frame, and an elastic mechanism is formed between the mounting frame and the movable frame through the torsion spring. When the take-up wheel rotates forward to take up the first pull rope, the mounting frame is forced to rotate horizontally around the movable frame, thereby driving the foot plate to rotate horizontally, thereby achieving horizontal exercise of the patient's ankle joint. When the take-up wheel reverses to release the first pull rope, the elastic action of the torsion spring can restore the mounting frame to its original position to ensure the normal operation of the device.

[0010] Preferably, a driven gear is also fixed on the rotating shaft, and the driven gear and the driving gear are meshed with each other to realize the transmission effect, and the driven gears are symmetrically distributed about the center line of the driving gear. At the same time, the meshing of the driving gear and the driven gear can make the rotating shaft rotate 15° each time. By constructing the transmission mechanism as described above, when the driving gear rotates, the driving gear is meshed with different driven gears for transmission, so that the rotating shaft can swing in an orderly manner, thereby realizing the vertical direction training effect on the patient's ankle joint, and by setting the number and position of the tooth blocks on the driving gear, the rotation angle of the rotating shaft can be determined to avoid damage to the patient caused by excessive rotation angle.

[0011] Preferably, the massage roller is also provided with convex particles and transmission gears; The convex particles are fixed on the massage roller at the same angles and with the same center; The transmission gear is symmetrically fixed on the massage roller, and the transmission gear is arranged in the foot plate. The massage mechanism is formed by the above mechanism. When the massage roller rotates, the convex particles are driven to rotate at the same time. Through the action of multiple groups of convex particles, the massage effect on the soles of the patient's feet can be achieved, thereby accelerating the blood training of the patient's feet and further improving the exercise recovery effect of the device.

[0012] Preferably, the transmission gear and the convex gear rod are meshed with each other to realize the transmission effect, and the convex gear rod is nested in the groove on the foot plate and can slide left and right. The transmission mechanism is formed by the above mechanism. When the convex gear rod moves, the transmission gear can be rotated through the meshing transmission effect between the convex gear rod and the transmission gear, thereby providing basic guarantee for the rotation of the massage roller and ensuring the normal operation of the device.

[0013] Preferably, the convex gear rod is also provided with a second spring and a second pull rope; A second spring is fixed to the right end of the convex toothed rod, and the other end of the second spring is fixed in the foot plate, and the convex toothed rod forms an elastic mechanism through the second spring and the foot plate; The second pull rope is fixed to the left end of the convex tooth rod, and the second pull rope passes through the left end surface of the foot plate to slide, and the other end of the second pull rope is connected to the take-up wheel. When the rotating shaft drives the take-up wheel to rotate forward and reverse in an orderly manner, the take-up wheel can realize the reeling and releasing function of the second pull rope. When the second pull rope is reeled in, the convex tooth rod is driven to move at the same time. When the second pull rope is released, the convex tooth rod can be automatically reset through the elastic action of the second spring, thereby providing basic guarantee for the movement of the convex tooth rod.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the ankle joint rehabilitation device with adjustable leg length adopts a linked multi-directional rotation mechanism, which can realize the multi-directional rotation of the patient's ankle joint, so as to simulate the normal movement of the human ankle joint, and cooperates with the adjustment mechanism to realize the adjustment of the foot position, so as to adapt to the use needs of different patients and improve the adaptability of the device, and cooperates with the linked foot massage mechanism to realize the synchronous massage effect of the patient's foot, accelerate the blood circulation of the patient's foot, and improve the patient's exercise effect. The specific contents are as follows: 1. The leg-length adjustable ankle joint rehabilitation device is provided with a bidirectional threaded rod. When adjusting the position of the foot plate, by rotating the bidirectional threaded rod, in cooperation with the threaded connection between the convex plate, the movable plate can be driven to move toward each other, thereby realizing the position adjustment of the movable plate, and then realizing the position adjustment of the foot plate, so as to meet the use needs of different patients and improve the adaptability of the device; 2. The leg-length adjustable ankle joint rehabilitation device is provided with a rotating shaft. During the exercise, the motor drives the driving gear to rotate, and the driving gear meshes with different driven gears, so that the rotating shaft can rotate forward and reverse in an orderly manner, thereby driving the foot plate to rotate, so as to achieve the vertical direction exercise effect on the patient's ankle joint. When the rotating shaft rotates, the take-up wheel is driven to rotate forward and reverse at the same time. Through the take-up wheel's effect of retracting and releasing the first pull rope and the elastic effect of the torsion spring, the mounting frame can be swung around the movable frame, so as to achieve the horizontal direction exercise effect on the patient's ankle joint, and ensure the exercise effect of the patient's ankle joint; 3. The leg-length-adjustable ankle rehabilitation device is provided with a massage roller. When the take-up wheel rotates forward and backward in an orderly manner, the second pull rope can be reeled in and released at the same time. With the elastic effect of the second spring, the convex gear rod can be moved left and right in an orderly manner. With the transmission effect between the convex gear rod and the transmission gear, the massage roller can be rotated, thereby driving the convex particles to rotate. Through the action of the convex particles, the patient's foot massage effect can be achieved, the blood circulation of the patient's feet can be accelerated, and the patient's exercise effect can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the front view structure of the bottom plate of the present invention; Figure 2 It is a schematic diagram of the side view structure of the rotating plate of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the rotating plate of the present invention; Figure 4 This is a schematic diagram of the top view of the foot plate of the present invention; Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle; Figure 6 It is a schematic diagram of the cross-sectional structure of the foot plate of the present invention from top view; Figure 7 For the present invention Figure 6 The enlarged structural diagram at B in the middle; Figure 8 It is a schematic diagram of the front view structure of the foot plate of the present invention.

[0016] In the figure: 1, bottom plate; 2, seat; 3, cushion; 4, armrest; 5, turn plate; 6, electric telescopic rod; 7, two-way threaded rod; 8, movable plate; 801, convex plate; 802, limit block; 9, elastic strap; 10, movable frame; 1001, slider; 11, limit rod; 1101, first spring; 12, mounting frame; 1201, torsion spring; 13, motor; 14, driving gear; 15, rotating shaft; 1501, driven gear; 16, take-up wheel; 17, first pull rope; 18, foot plate; 19, baffle; 20, restraint belt; 21, massage roller; 2101, convex particle; 2102, transmission gear; 22, convex gear rod; 2201, second spring; 2202, second pull rope. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-8 The present invention provides a technical solution: an ankle joint rehabilitation device capable of adjusting leg length, comprising a base plate 1, a seat 2 is fixed to the upper end surface of the base plate 1, a cushion 3 is fixed to the upper end surface of the seat 2, and an armrest 4 is symmetrically fixed to the upper end surface of the seat 2; Also includes: The rotating plate 5 is rotatably connected to the right end of the seat 2 through a cylindrical shaft, and a bidirectional threaded rod 7 is connected to the bearing inside the rotating plate 5, and a movable plate 8 is symmetrically arranged on the right side of the rotating plate 5, and an elastic strap 9 is fixed on the movable plate 8, and a Velcro is arranged on the elastic strap 9 for connection; A movable frame 10 is arranged on the right side of the movable plate 8, and a limit rod 11 is symmetrically connected to the movable frame 10, and a rotatable mounting frame 12 is connected to the movable frame 10 through a columnar shaft, and a motor 13 is fixed in the mounting frame 12, and a driving gear 14 is fixed to the end of the output shaft of the motor 13, and the driving gear 14 is arranged on the right side of the mounting frame 12 and a rotating shaft 15 is connected to the right bearing of the mounting frame 12, and a take-up wheel 16 is symmetrically fixed on the rotating shaft 15, and a first pull rope 17 is connected to the take-up wheel 16, and the first pull rope 17 penetrates the mounting frame 12 to slide, and the other end of the first pull rope 17 is fixed to the movable frame 10; The foot plate 18 is fixed on the rotating shaft 15, and a baffle 19 is vertically fixed on the upper end surface of the foot plate 18, and a restraining belt 20 is fixed on the upper end surface of the foot plate 18. At the same time, Velcro is fixed on the restraining belt 20 for connection. Massage rollers 21 are connected to the foot plate 18 at evenly spaced bearings.

[0019] A rotatable electric telescopic rod 6 is connected to the rotating plate 5 via a cylindrical shaft, and the other end of the electric telescopic rod 6 is rotatably connected to the bottom plate 1 via a cylindrical shaft to achieve an adjustment function.

[0020] The movable plate 8 is also provided with a convex plate 801 and a limit block 802; The convex plate 801 is fixed on the left end surface of the movable plate 8, and the convex plate 801 and the groove on the rotating plate 5 are mutually nested and slidable, and the convex plate 801 is mutually connected with the bidirectional threaded rod 7 through a thread; The limit block 802 is symmetrically fixed on the movable plate 8, and the limit block 802 is nested in the groove on the rotating plate 5 and can slide.

[0021] Slide blocks 1001 are symmetrically fixed on the movable frame 10, and the slide blocks 1001 are nested in the slots on the movable plate 8 and can slide up and down.

[0022] The limiting rod 11 is nested with the opening on the movable plate 8 to form a limiting mechanism, and a first spring 1101 is fixed on the limiting rod 11, and the other end of the first spring 1101 is fixed to the movable frame 10. At the same time, the limiting rod 11 forms an elastic mechanism through the first spring 1101 and the movable frame 10.

[0023] A torsion spring 1201 is further provided between the mounting frame 12 and the movable frame 10 , and the mounting frame 12 forms an elastic mechanism with the movable frame 10 through the torsion spring 1201 .

[0024] A driven gear 1501 is also fixed on the rotating shaft 15, and the driven gear 1501 meshes with the driving gear 14 to achieve transmission, and the driven gear 1501 is symmetrically distributed about the center line of the driving gear 14. At the same time, the driving gear 14 and the driven gear 1501 mesh to make the rotating shaft 15 rotate 15° each time.

[0025] The massage roller 21 is also provided with convex particles 2101 and a transmission gear 2102; The convex particles 2101 are fixed on the massage roller 21 at the same angle and with the same center; The transmission gear 2102 is symmetrically fixed on the massage roller 21 , and the transmission gear 2102 is arranged in the foot plate 18 .

[0026] The transmission gear 2102 and the convex gear rod 22 mesh with each other to achieve transmission, and the convex gear rod 22 is nested in the groove on the foot plate 18 and can slide left and right.

[0027] The protruding gear rod 22 is also provided with a second spring 2201 and a second pull rope 2202; The second spring 2201 is fixed to the right end of the convex gear rod 22, and the other end of the second spring 2201 is fixed in the foot plate 18, and the convex gear rod 22 forms an elastic mechanism through the second spring 2201 and the foot plate 18; The second pull rope 2202 is fixed to the left end of the convex tooth rod 22 , and the second pull rope 2202 passes through the left end surface of the foot plate 18 to slide, and the other end of the second pull rope 2202 is connected to the take-up wheel 16 .

[0028] Working principle: Figure 1-8 As shown, when using the ankle joint rehabilitation device with adjustable leg length, first place the base plate 1, and the patient sits on the seat 2. At this time, the patient's buttocks are in contact with the cushion 3 to ensure the patient's comfort. Then, the positions of the movable plate 8 and the foot plate 18 are adjusted according to the patient's leg position. By rotating the bidirectional threaded rod 7 and cooperating with the threaded connection between the bidirectional threaded rod 7 and the convex plate 801, the convex plate 801 can be driven to move toward each other, thereby driving the movable plate 8 to move toward each other, thereby achieving the adjustment of the position of the movable plate 8. When the movable plate 8 moves, the sliding guide between the limit block 802 and the rotating plate 5 can ensure that the movable plate 8 makes stable linear motion until the movable plate 8 contacts the patient's calf, and at this time the patient's foot is located directly above the foot plate 18, thereby completing the adjustment. Then, the position of the foot plate 18 is adjusted according to the length of the patient's legs. The limiting rod 11 is pulled to separate the limiting rod 11 from the opening on the movable plate 8, thereby releasing the limiting effect on the movable frame 10. Then, the movable frame 10 is pushed to adjust the position of the movable frame 10. With the sliding guide effect between the slider 1001 and the movable plate 8, the movable frame 10 is ensured to make a stable linear motion until the foot plate 18 contacts the patient's foot, thereby completing the adjustment effect. Then, the limiting rod 11 is released. At this time, under the elastic effect of the first spring 1101, the limiting rod 11 is restored to its original position and is in contact with the opening on the movable plate 8. The holes are nested to achieve positioning and ensure the stability of the movable frame 10. At this time, the sole of the patient's foot contacts the convex particle 2101, and the heel contacts the baffle 19. Then, the elastic strap 9 cooperates with the Velcro to bind the patient's legs, and the restraint belt 20 cooperates with the Velcro to bind the patient's feet. Then, the electric telescopic rod 6 is started to extend, and the rotation of the electric telescopic rod 6 can make the rotating plate 5 rotate around the seat 2 under force, so as to adjust the angle of the rotating plate 5, and then adjust the angle of the patient's legs to ensure the comfort of the patient. When exercising, the motor 13 is started, and the driving gear 14 is driven to rotate under the action of the motor 13. Figure 4 and Figure 6 As shown, when the driving gear 14 is meshed with the upper driven gear 1501, the driving gear 14 and the lower driven gear 1501 do not mesh, thereby driving the rotating shaft 15 to rotate forward. When the driving gear 14 is separated from the upper driven gear 1501, the driving gear 14 is meshed with the lower driven gear 1501, thereby driving the rotating shaft 15 to rotate reversely. According to the above principle, the rotating shaft 15 can be driven to rotate forward and reverse in an orderly manner (and the rotating shaft 15 rotates at an angle of 15° each time). When the rotating shaft 15 rotates, the foot plate 18 is also driven to rotate, thereby achieving the patient's The vertical direction training effect of the ankle joint is that when the rotating shaft 15 rotates, the take-up wheel 16 is also driven to rotate. When the take-up wheel 16 rotates forward, the first pull rope 17 is taken up, so that the mounting frame 12 is forced to rotate horizontally around the movable frame 10. When the take-up wheel 16 rotates reversely, the first pull rope 17 is released. At this time, the mounting frame 12 is restored to its original position under the elastic action of the torsion spring 1201. According to the above principle, the mounting frame 12 can be swung in an orderly manner, and then the foot plate 18 can be driven to swing, so as to achieve the horizontal direction training effect of the patient's ankle joint and ensure the training effect. like Figure 6As shown, when the take-up wheel 16 rotates forward and backward, the second pull rope 2202 is taken up and released at the same time. When the second pull rope 2202 is taken up, the convex tooth rod 22 is driven to move to the left. When the second pull rope 2202 is released, the convex tooth rod 22 is moved to the right under the action of the second spring 2201. According to the above principle, the convex tooth rod 22 can be moved left and right in an orderly manner. With the transmission action between the convex tooth rod 22 and the transmission gear 2102, the massage roller 21 can be rotated, thereby driving the convex particle 2101 to rotate. Through the action of the convex particle 2101, the sole of the patient's foot can be massaged, the blood circulation of the patient's foot can be accelerated, and the exercise effect of the patient can be improved. This is the working principle of the ankle joint rehabilitation device with adjustable leg length.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ankle joint rehabilitation device capable of adjusting leg length, comprising a base plate (1), a seat (2) being fixed to an upper end surface of the base plate (1), a cushion (3) being fixed to an upper end surface of the seat (2), and an armrest (4) being symmetrically fixed to an upper end surface of the seat (2); It is characterized in that Also includes: A rotating plate (5) is rotatably connected to the right end of the seat (2) via a cylindrical shaft, and a bearing inside the rotating plate (5) is connected to a bidirectional threaded rod (7), and a movable plate (8) is symmetrically arranged on the right side of the rotating plate (5), and an elastic strap (9) is fixed on the movable plate (8), and a Velcro is arranged on the elastic strap (9) for connection; A movable frame (10) is arranged on the right side of the movable plate (8), and a limit rod (11) is symmetrically connected to the movable frame (10), and a rotatable mounting frame (12) is connected to the movable frame (10) via a columnar shaft, and a motor (13) is fixed in the mounting frame (12), a driving gear (14) is fixed at the end of the output shaft of the motor (13), and the driving gear (14) is arranged on the right side of the mounting frame (12), and a rotating shaft (15) is connected to the right bearing of the mounting frame (12), and a take-up wheel (16) is symmetrically fixed on the rotating shaft (15), and a first pull rope (17) is connected to the take-up wheel (16), and the first pull rope (17) penetrates the mounting frame (12) to slide, and the other end of the first pull rope (17) is fixed to the movable frame (10); A foot plate (18) is fixed on the rotating shaft (15), and a baffle (19) is vertically fixed to the upper end surface of the foot plate (18), and a restraining belt (20) is fixed to the upper end surface of the foot plate (18), and a Velcro is fixed on the restraining belt (20) for connection, and a massage roller (21) is connected to the evenly spaced bearings on the foot plate (18).

2. The ankle joint rehabilitation device with adjustable leg length according to claim 1, characterized in that: The rotating plate (5) is connected to a rotatable electric telescopic rod (6) via a columnar shaft, and the other end of the electric telescopic rod (6) is rotatably connected to the bottom plate (1) via the columnar shaft to achieve an adjustment function.

3. The ankle joint rehabilitation device with adjustable leg length according to claim 1, characterized in that: The movable plate (8) is also provided with a convex plate (801) and a limit block (802); A convex plate (801) is fixed on the left end surface of the movable plate (8), and the convex plate (801) and the groove on the rotating plate (5) are mutually nested and slided, and the convex plate (801) is mutually connected with the bidirectional threaded rod (7) through a thread; The limit block (802) is symmetrically fixed on the movable plate (8), and the limit block (802) is nested in the groove on the rotating plate (5) and can slide.

4. The ankle joint rehabilitation device with adjustable leg length according to claim 1, characterized in that: Slide blocks (1001) are also symmetrically fixed on the movable frame (10), and the slide blocks (1001) are nested in the slots on the movable plate (8) and can slide up and down.

5. The ankle joint rehabilitation device with adjustable leg length according to claim 1, characterized in that: The limiting rod (11) is nested with the opening on the movable plate (8) to form a limiting mechanism, and a first spring (1101) is also fixed on the limiting rod (11), and the other end of the first spring (1101) is fixed to the movable frame (10), and the limiting rod (11) forms an elastic mechanism through the first spring (1101) and the movable frame (10).

6. The ankle joint rehabilitation device with adjustable leg length according to claim 1, characterized in that: A torsion spring (1201) is also provided between the mounting frame (12) and the movable frame (10), and an elastic mechanism is formed between the mounting frame (12) and the movable frame (10) through the torsion spring (1201).

7. The ankle joint rehabilitation device with adjustable leg length according to claim 1, characterized in that: A driven gear (1501) is also fixed on the rotating shaft (15), and the driven gear (1501) and the driving gear (14) are meshed with each other to achieve a transmission effect, and the driven gear (1501) is symmetrically distributed about the center line of the driving gear (14), and the meshing of the driving gear (14) and the driven gear (1501) can make the rotating shaft (15) rotate 15 degrees each time.

8. The ankle joint rehabilitation device capable of adjusting leg length according to claim 1, characterized in that: The massage roller (21) is also provided with convex particles (2101) and a transmission gear (2102); The convex particles (2101) are fixed on the massage roller (21) at the same angle and with the same center; The transmission gear (2102) is symmetrically fixed on the massage roller (21), and the transmission gear (2102) is arranged inside the foot plate (18).

9. The ankle joint rehabilitation device capable of adjusting leg length according to claim 8, characterized in that: The transmission gear (2102) and the convex gear rod (22) mesh with each other to achieve a transmission effect, and the convex gear rod (22) is nested in a groove on the foot plate (18) and can slide left and right.

10. The ankle joint rehabilitation device capable of adjusting leg length according to claim 9, characterized in that: The convex tooth rod (22) is also provided with a second spring (2201) and a second pull rope (2202); A second spring (2201) is fixed to the right end of the convex tooth rod (22), and the other end of the second spring (2201) is fixed in the foot plate (18), and the convex tooth rod (22) forms an elastic mechanism with the foot plate (18) through the second spring (2201); The second pull rope (2202) is fixed to the left end of the convex tooth rod (22), and the second pull rope (2202) passes through the left end surface of the foot plate (18) to slide, and the other end of the second pull rope (2202) is connected to the take-up wheel (16).

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