Automatic ankle pump passive movement rehabilitation apparatus

Abstract

The utility model belongs to the technical field of rehabilitation training, and discloses an automatic ankle pump passive movement rehabilitation device which comprises a box body, an inner cavity with an opening is formed in the box body, a fixing shaft is installed in the inner cavity, a foot support is movably arranged on the periphery of the fixing shaft, a plurality of adjusting belts used for fixing the foot sole are arranged on the foot support, and the adjusting belts are connected with the box body. A base is arranged at the bottom of the inner cavity, a movable groove is formed in the base, a swing rod movably arranged in the movable groove is arranged at the bottom of the foot support, an adjusting assembly is arranged on the base and used for adjusting the maximum swing angle of the swing rod, and a motor is arranged on the box body and used for adjusting the maximum swing angle of the swing rod. The device has the advantages that the device is driven by the motor to rotate, then the connecting rod mechanism is driven to drive the foot support to swing, a patient can automatically complete ankle pump movement, the patient can use the adjusting assembly to adjust the swing angle of the foot support according to different conditions of the patient, and the device is wider in application range and more convenient to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of rehabilitation training, and in particular relates to an automated ankle pump passive motion rehabilitation device. Background Art

[0002] Many long-term bedridden patients suffer from lower limb paralysis due to stroke. If there is no early intervention, insufficient blood perfusion in their limbs will lead to neuromuscular atrophy and lower limb venous thrombosis, seriously affecting the patient's health. DVT is a process in which blood coagulation or certain formed elements in the blood aggregate to form solid masses in the deep veins. DVT can occur in veins throughout the body, but is more common in the deep veins of the lower limbs. It is common after major orthopedic surgery. Clinically, ankle pump exercises are the simplest and most effective training method for functional exercise of lower limb fractures. They mainly use the movement of the ankle joint to drive the contraction of the lower limb muscles, accelerate blood return, promote the elimination of swelling and the recovery of limb function. Ankle pump training in the early postoperative period can increase the flow of blood in a hypercoagulable state and inhibit the formation of lower limb venous thrombosis.

[0003] A Chinese invention patent (application publication number: CN107296724A) has been found to provide a training device for ankle pump exercises for patients with foot drop. The device comprises a horizontally positioned base, a rotatable support plate disposed along one end of the base's length, a slide rail disposed along the length of the support plate, a connecting plate slidably connected to the slide rail, and a training frame disposed between the base and the support plate. The training frame is connected to the connecting plate at one end along its length and rotatably connected to the base at the other end. An operating lever for patient operation is disposed at the end of the support plate remote from the base, and a fixture is disposed on the training frame for securing the patient's foot. This prior art can effectively prevent lower limb venous thrombosis-related heart, brain, and lung embolism, while also facilitating the recovery of lower limb function and facilitating self-rehabilitation training for patients with foot drop. This allows patients to actively participate in their own limb rehabilitation, providing increased comfort, reducing costs, and improving work efficiency.

[0004] As can be seen from the above-mentioned prior art, in the prior art, patients still need to manually train for ankle pump exercises, which is not convenient for some patients who have difficulty moving on their own after surgery. In addition, the angle of movement of each patient's ankle is different, and the patient needs to control the intensity of the ankle pump exercise by himself each time, which is quite troublesome.

[0005] In addition, because different frequencies of ankle pump exercises produce different muscle contraction and relaxation forces, the pressure on the vein wall is different, and the venous filling time and speed are also different. In the existing technology, there is no pause step when performing ankle pump exercises, but the plantar flexion and dorsiflexion movements are repeated at a high frequency, which may cause secondary damage to the patient. Studies have shown that the peak time of femoral vein blood return is 3 seconds, and it begins to decline after 3 seconds, indicating that the strength of the flexor and extensor muscles reaches its peak at 3 seconds, and the muscle strength begins to decline after 3 seconds, indicating that maintaining ankle plantar flexion and dorsiflexion for 3 seconds is more conducive to limb venous return. Therefore, the ankle pump exercise requires appropriate pauses when performing plantar flexion and dorsiflexion movements, which can make the ankle pump exercise more effective. Therefore, the above shortcomings need to be improved urgently. Utility Model Content

[0006] The purpose of the present invention is to solve the above problems. The present invention provides an automated ankle pump passive exercise rehabilitation device, which has the advantages of allowing patients to automatically complete ankle pump exercises and adjusting the swing angle of the footrest.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: it includes a box body, an open inner cavity is provided in the box body, a fixed shaft is installed in the inner cavity, a footrest is movably provided on the outer periphery of the fixed shaft, and a plurality of adjustment straps for fixing the soles of the feet are provided on the footrest, a base is provided at the bottom of the inner cavity, a movable groove is provided in the base, a swing rod movably arranged in the movable groove is provided at the bottom of the footrest, an adjustment component is provided on the base, and the adjustment component is used to adjust the maximum swing angle of the swing rod, a motor is provided on the box body, an output shaft is driven and installed on the motor, a sector gear is installed on the output shaft, a driven gear is installed on the output shaft, and the driven gear is meshed with the sector gear, a rotating wheel is installed on the outer periphery of the output shaft, and a connecting rod mechanism is provided between the rotating wheel and the footrest, and the connecting rod mechanism is driven by the rotating wheel and drives the footrest to swing.

[0008] Preferably, the connecting rod mechanism includes a connecting plate and a movable rod, the connecting plate has a first slide groove, the end surface of the rotating wheel is provided with a convex shaft, the convex shaft is slidably set in the first slide groove, the movable rod includes a first end and a second end, the first end is hinged to the connecting plate, the second end is provided with a second slide groove, a push block assembly is slidably provided in the second slide groove of the second end, the push block assembly is abutted against the back of the foot rest, a mounting seat is installed on the inner wall of the inner cavity, and the mounting seat is provided with a guide cylinder sleeved on the outer periphery of the movable rod.

[0009] Preferably, the push block assembly includes two movable blocks and a connecting rod, the connecting rod is installed between the two movable blocks, and the foot rest has an arc-shaped cavity, one of the movable blocks slides and fits in the second slide groove, and the other movable block slides and fits in the arc-shaped cavity, and a spring is provided between the movable block located in the second slide groove and the second slide groove.

[0010] Preferably, a wheel is provided at the lower end of the swing arm, and the wheel is movably arranged in the movable groove.

[0011] Preferably, the adjustment assembly includes a fixed shell fixedly mounted on the base, the fixed shell having a sliding cavity, two movable plates located on both sides of the swing rod slidingly fitted in the sliding cavity, and adjustment rods are rotatably provided on the movable plates, and the adjustment rods are threadedly mounted on the fixed shell.

[0012] Preferably, a knob is provided at one end of the connecting rod away from the movable plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] The utility model provides an automated ankle pump passive motion rehabilitation device, which is driven by a motor to rotate, and then drives a connecting rod mechanism to drive the connecting rod mechanism to drive the footrest to swing, so that the patient can automatically complete the ankle pump movement, and the patient can use the adjustment component to adjust the footrest swing angle according to their own different conditions, and the patient can pause for 3-5 seconds when doing plantar flexion and dorsiflexion, so that the ankle pump exercise effect is better, the scope of application is wider, and it is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the internal explosion structure of the utility model;

[0018] Figure 4 for Figure 2 Schematic diagram of the enlarged structure of A;

[0019] Figure 5 This is a schematic diagram of the three-dimensional structure of the back of the footrest of the present invention;

[0020] Figure 6 for Figure 2 Schematic diagram of the enlarged structure of B.

[0021] Description of the drawings: 1. Box; 10. Inner cavity; 11. Fixed shaft; 12. Base; 121. Movable groove; 13. Mounting seat; 131. Guide cylinder; 14. Bearing seat; 2. Motor; 21. Output shaft; 22. Rotating wheel; 221. Protruding shaft; 222. Stop block; 23. Connecting plate; 231. First slide groove; 24. Movable rod; 240. Second slide groove; 241. First end; 242. Second end; 25. Movable block ;250, mounting hole;251, mounting slot;26, connecting shaft;27, connecting rod;28, spring;3, footrest;30, sliding slot;31, adjustment belt;32, swing rod;33, arc cavity;34, wheel;35, clamping plate;351, limit slot;4, adjustment assembly;40, sliding cavity;41, fixed shell;42, adjustment rod;43, movable plate;44, knob;51, driven gear;52, fan gear. DETAILED DESCRIPTION

[0022] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0023] like Figures 1-6As shown, an automated ankle pump passive motion rehabilitation device includes a box body 1, which has an open inner cavity 10, a fixed shaft 11 installed in the inner cavity 10, a footrest 3 is movably provided on the outer periphery of the fixed shaft 11, and the footrest 3 has a sliding groove 30. The fixed shaft 11 is arranged in the sliding groove 30. When the footrest 3 swings, the fixed shaft 11 will move relatively in the sliding groove 30. The footrest 3 is provided with a plurality of adjustment straps 31 for fixing the sole of the foot. In the present application, the adjustment strap 31 is composed of two parts, and the two parts of the adjustment strap 31 are connected by Velcro, so that the size of the space for accommodating the sole of the foot between the adjustment strap 31 and the footrest 3 can be adjusted according to the height of the instep and the size of the sole of the foot. A base 12 is provided at the bottom of the inner cavity 10, and a movable groove 121 is provided in the base 12. A swing rod 32 movably arranged in the movable groove 121 is provided at the bottom of the footrest 3, and an adjustment component 4 is provided on the base 12. The adjustment component 4 is used to adjust the swing rod The maximum swing angle of 32 is provided on the housing 1. The motor 2 is driven to install an output shaft 21. The output shaft 21 is installed with a sector gear 52. The output shaft 21 is installed with a driven gear 51. The driven gear 51 is meshed with the sector gear 52. The sector gear 52 is meshed with the driven gear 51, so that when the sector gear 52 rotates and meshes with the driven gear 51, it drives the driven gear 51 to rotate half a circle, thereby realizing the movement of plantar flexion and dorsiflexion. The sector gear 52 is switched, and after the sector gear 52 is engaged with the driven gear 51, the sector gear 52 has an idling time of 3-5s, so that the patient can have time to pause when doing plantar flexion and dorsiflexion movements, and the ankle pump exercise effect is better. A bearing seat 14 for mounting the output shaft 21 is fixedly mounted on the inner wall of the inner cavity 10, and a rotating wheel 22 is mounted on the outer periphery of the output shaft 21. A connecting rod mechanism is provided between the rotating wheel 22 and the foot rest 3, and the connecting rod mechanism is driven by the rotating wheel 22 and drives the foot rest 3 to swing.

[0024] The connecting rod mechanism includes a connecting plate 23 and a movable rod 24, the connecting plate 23 has a first sliding groove 231, a convex shaft 221 is provided on the end surface of the rotating wheel 22, the convex shaft 221 is slidably set in the first sliding groove 231, and a limiting block 222 is installed on the convex shaft 221, the limiting block 222 has a diameter greater than the diameter of the convex shaft 221, and the limiting block 222 has a diameter greater than the width of the first sliding groove 231, the movable rod 24 includes a first end 241 and a second end 242, the first end 241 is hinged to the connecting plate 23, a second sliding groove 240 is provided on the second end 242, and a push block assembly is slidably provided in the second sliding groove 240 of the second end 242, and the push block assembly is arranged to abut against the back of the foot rest 3, and a mounting seat 13 is installed on the inner wall of the inner cavity 10, and a guide cylinder 131 is provided on the mounting seat 13 that is sleeved on the outer periphery of the movable rod 24.

[0025] The push block assembly includes two movable blocks 25 and a connecting rod 27. The connecting rod 27 is installed between the two movable blocks 25. There is an arc-shaped cavity 33 in the footrest 3. One of the movable blocks 25 slides and fits in the second slide groove 240, and the other movable block 25 slides and fits in the arc cavity 33. A spring 28 is provided between the movable block 25 located in the second slide groove 240 and the second slide groove 240, and the movable block 25 has a mounting groove 251 for positioning and installing the spring 28. The movable block 25 also has a mounting hole 250 for positioning and installing the connecting rod 27, and the movable block 25 and the connecting rod 27 are connected by bolts.

[0026] Furthermore, a clamping plate 35 for closing the arc-shaped cavity 33 is fixedly installed on the back of the footrest 3. The clamping plate 35 has a limiting groove 351 for the connecting rod 27 to pass through. The width of the movable block 25 is greater than the width of the limiting groove 351, so the movable block 25 can always be limited in the arc-shaped cavity 33, thereby preventing the movable block 25 from being disconnected from the footrest 3.

[0027] A wheel 34 is provided at the lower end of the swing rod 32 , and the wheel 34 is movably disposed in the movable groove 121 , thereby improving the smoothness of the swing rod 32 when swinging.

[0028] The adjustment assembly 4 includes a fixed shell 41 fixedly mounted on the base 12, the fixed shell 41 has a sliding cavity 40, the sliding cavity 40 passes through the movable groove 121, and two movable plates 43 located on both sides of the swing rod 32 are slidably engaged in the sliding cavity 40, and an adjustment rod 42 is rotatably provided on the movable plate 43, and the adjustment rod 42 is threadedly mounted on the fixed shell 41.

[0029] A knob 44 is provided at one end of the connecting rod 27 away from the movable plate 43 , so that when the adjusting rod 42 is manually rotated, the knob 44 can be held to more conveniently rotate the adjusting rod 42 .

[0030] In this embodiment, there are two foot supports 3, and both foot supports 3 are installed on the periphery of the fixed shaft 11, while there is only one rotating wheel 22, and the protruding shaft 221 on the rotating wheel 22 is connected to the connecting plate 23 on the side away from the motor 2, and the protruding shaft 221 is located on the end face of the rotating wheel 22 on the side away from the motor 2, so that the output shaft 21 will not get stuck in the connecting plate 23, and there are only movable rods 24 and mounting seat 13 on the side close to the motor 2, and a connecting shaft 26 is connected between the two movable rods 24, and the connecting shaft 26 is installed on the first end 241 of the two movable rods 24.

[0031] When in use, the patient takes a supine or semi-sitting position with the thighs in a relaxed state, and places the soles of both feet on the footrests 3 respectively, and fixes the soles of the feet on the footrests 3 by adjusting the straps 31, and moves the movable plate 43 in the movable cavity. When the movable plate 43 close to the patient's side moves, it can adjust the angle of plantar flexion (toes down), and when the movable plate 43 away from the patient's side moves, it can adjust the angle of dorsiflexion (toes up). Therefore, different angles of plantar flexion and dorsiflexion can be adjusted according to different patients. After the adjustment is completed, the motor 2 is started, and the output shaft 21 is driven by the motor 2 to rotate, which in turn drives the sector gear 52 to rotate, which in turn drives the driven gear 51 to rotate, which in turn drives the output shaft 21 to rotate, which in turn drives the rotating wheel 22 to rotate, and then drives the cam 221 to rotate around the output shaft. The axis 21 rotates, thereby driving the connecting plate 23 to move, and then driving the movable rod 24 to do reciprocating motion along the radial direction of the rotating wheel 22, and then driving the movable block 25 and the connecting rod 27 to do reciprocating motion, and then driving the footrest 3 to do reciprocating swinging motion. The sliding groove 30 can make the footrest 3 more flexible and will not be stuck when swinging, and when the adjustment component 4 is adjusted, the swinging angle of the footrest 3 is changed, so the movable block 25 slides in the second slide groove 240 and can adaptively cooperate with the adjustment. The setting of the movable groove 121 and the second slide groove 240 can prevent the footrest 3 from getting stuck during the swinging process, and the two movable rods 24 are connected together by the connecting shaft 26, which can synchronize the movement of the two movable rods 24, thereby driving the two footrests 3 to move synchronously, and performing ankle pump exercises on both feet at the same time.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automated ankle pump passive motion rehabilitation device, characterized by: The invention comprises a box body (1), wherein the box body (1) has an inner cavity (10) with an opening, a fixed shaft (11) is installed in the inner cavity (10), a footrest (3) is movably provided on the outer periphery of the fixed shaft (11), and the footrest (3) is provided with a plurality of adjustment straps (31) for fixing the sole of the foot, a base (12) is provided at the bottom of the inner cavity (10), a movable groove (121) is provided in the base (12), a swing rod (32) movably provided in the movable groove (121) is provided at the bottom of the footrest (3), an adjustment component (4) is provided on the base (12), and the adjustment component (4) For adjusting the maximum swing angle of the swing rod (32), the housing (1) is provided with a motor (2), the motor (2) is driven to be installed with an output shaft (21), the output shaft (21) is installed with a sector gear (52), the output shaft (21) is installed with a driven gear (51), the driven gear (51) is meshed with the sector gear (52), a rotating wheel (22) is installed on the outer periphery of the output shaft (21), a connecting rod mechanism is provided between the rotating wheel (22) and the footrest (3), and the connecting rod mechanism is driven by the rotating wheel (22) and drives the footrest (3) to swing.

2. The automated ankle pump passive exercise rehabilitation device according to claim 1, characterized in that: The connecting rod mechanism includes a connecting plate (23) and a movable rod (24), the connecting plate (23) has a first slide groove (231), the end surface of the rotating wheel (22) is provided with a convex shaft (221), the convex shaft (221) is slidably set in the first slide groove (231), the movable rod (24) includes a first end (241) and a second end (242), the first end (241) is hinged to the connecting plate (23), the second end (242) is provided with a second slide groove (240), the second end (242) is provided with a push block assembly in the second slide groove (240), the push block assembly is abutted against the back of the footrest (3), a mounting seat (13) is installed on the inner wall of the inner cavity (10), and the mounting seat (13) is provided with a guide cylinder (131) sleeved on the outer periphery of the movable rod (24).

3. The automated ankle pump passive exercise rehabilitation device according to claim 2, characterized in that: The push block assembly includes two movable blocks (25) and a connecting rod (27), wherein the connecting rod (27) is installed between the two movable blocks (25), and the footrest (3) has an arc-shaped cavity (33), wherein one of the movable blocks (25) slides and fits in the second slide groove (240), and the other movable block (25) slides and fits in the arc-shaped cavity (33), and a spring (28) is provided between the movable block (25) located in the second slide groove (240) and the second slide groove (240).

4. The automated ankle pump passive exercise rehabilitation device according to claim 3, characterized in that: A wheel (34) is provided at the lower end of the swing rod (32), and the wheel (34) is movably disposed in the movable groove (121).

5. The automated ankle pump passive exercise rehabilitation device according to claim 4, characterized in that: The adjustment assembly (4) includes a fixed shell (41) fixedly mounted on the base (12), the fixed shell (41) having a sliding cavity (40), two movable plates (43) located on both sides of the swing rod (32) slidingly engaged in the sliding cavity (40), and an adjustment rod (42) rotatably provided on each of the movable plates (43), and the adjustment rod (42) is threadedly mounted on the fixed shell (41).

6. The automated ankle pump passive exercise rehabilitation device according to claim 5, characterized in that: A knob (44) is provided at one end of the connecting rod (27) away from the movable plate (43).

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