Ankle assist device for preventing lower limb venous thrombosis

Abstract

The invention relates to the technical field of ankle assistors, in particular to an ankle assistor for preventing lower limb venous thrombosis, which comprises a protective plate, a supporting plate and the like. A supporting plate is rotationally connected to the protection plate. By means of contact between the soft plate and the legs of a user, the contact area between the soft plate and the legs of the user is increased, the pressure applied to the shanks by the air cylinders is dispersed, meanwhile, the soft plate can wrap the shanks, and the protection capacity of the equipment to the user is improved while the comfort is improved; air is sprayed to the bottom of the sole of a user through the self-suction air bag, and then air is blown to the bottom of the sole for heat dissipation, so that sweat stains are reduced, and the comfort of the user in the using process is improved; the distance between the bottom plate and the supporting plate is adjusted, the self-suction air bag is wrapped in the middle, the self-suction air bag is used for buffering and damping in the walking and standing process, and meanwhile the situation that the gravity center of a user is too high and unstable after the user wears the self-suction air bag is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of rehabilitation devices, and particularly relates to an ankle assistor for preventing lower limb venous thrombosis. Background Art

[0002] In order to prevent lower limb venous thrombosis in patients, it is usually necessary to train the calf, sole and ankle to simulate normal walking, promote blood circulation in the calf, and avoid blood stasis causing thrombosis. There are existing ankle assistors that actively drive the sole to perform plantar flexion and dorsiflexion to assist users in simulating walking for training. However, existing ankle assistors usually use an electric push rod as the active component for assistance. During the dorsiflexion process of the user, considering that the calves of different users have different thicknesses, and after the user wears the assistor, the distance between the electric push rod and the calf cannot be adjusted. As a result, for users with thicker calves, the electric push rod will gradually approach the calf. Considering that the electric push rod is generally cylindrical, the contact area with the user's leg is small, which will generate a large pressure on the calf, causing discomfort to the user during the training process and even damaging the calf muscles of the user.

[0003] Considering that the ankle assistor needs to use a top plate to support on the ground to ensure the stability of the assistor during use. When the user needs to walk briefly or stand up to move independently during the use process, the user needs to take off the assistor from the calf to avoid too large a distance between the pedal and the top plate, resulting in too high a center of gravity of the user after standing, making the user unstable during walking or standing and prone to falling. And when the user takes off the assistor, it is necessary to untie the straps binding the calf and the sole one by one, and the whole process is cumbersome.

[0004] In summary, the present application proposes an ankle assistor for preventing lower limb venous thrombosis to solve the above problems. Summary of the Invention

[0005] In order to overcome the disadvantages that during the dorsiflexion process of the user, the electric push rod will generate a large pressure on the calf, causing discomfort to the user during the training process and even damaging the calf muscles of the user, and at the same time, the distance between the pedal and the top plate is too large, the user's center of gravity is unstable when walking briefly or standing up, and it is more cumbersome to take off the device, the present invention provides an ankle assistor for preventing lower limb venous thrombosis.

[0006] Technical solution: An ankle assist device for preventing lower limb venous thrombosis, comprising a guard plate, a support plate, a first strap, a bottom plate and a cylinder; the guard plate is rotatably connected with the support plate; several first straps are arranged on the support plate; the guard plate is connected with the bottom plate; a cylinder is jointly connected between the guard plate and the support plate; it further comprises a flexible plate, a self-suction airbag, a rubber folding frame, a first one-way valve diaphragm and a second one-way valve diaphragm; several rubber convex strips are arranged on the support plate; a flexible plate for improving comfort is fixedly connected to the cylinder; a self-suction airbag for improving the heat dissipation effect is fixedly connected to the bottom plate; several air inlets are opened on the left side of the self-suction airbag, and a first one-way valve diaphragm is fixedly connected to each air inlet of the self-suction airbag, and the first one-way valve diaphragm opens towards the inside of the self-suction airbag; a rubber folding frame is fixedly connected to the upper side of the self-suction airbag; the upper side of the rubber folding frame is detachably connected to the support plate; a rectangular hole is opened on the upper side of the self-suction airbag, and the rectangular hole is located inside the rubber folding frame; several through holes are opened on the support plate, and all the through holes are directly above the inner space of the rubber folding frame; a second one-way valve diaphragm is fixedly connected to each through hole of the support plate, and the second one-way valve diaphragm is arranged to open upwards.

[0007] Further, in the above-mentioned ankle assist device for preventing lower limb venous thrombosis, it further comprises a nut; at least two threaded parts are arranged on the guard plate; at least two second chutes are opened on the bottom plate, and the bottom plate is slidably connected to the threaded parts through the second chutes; a nut for locking the bottom plate is rotatably connected to each threaded part.

[0008] Further, in the above-mentioned ankle assist device for preventing lower limb venous thrombosis, it further comprises a second strap and a heat preservation cotton; at least four rectangular grooves distributed in a rectangle are opened on the guard plate; a second strap is slidably connected between two relatively front and rear rectangular grooves; a heat preservation cotton for heat preservation is fixedly connected between each second strap and the guard plate.

[0009] Further, both the first strap and the second strap are made of breathable materials.

[0010] Further, the lower side of the bottom plate is provided with rough textures.

[0011] Further, several rubber bumps are arranged on the flexible plate.

[0012] Further, the guard plate, the support plate and the bottom plate are all made of light alloy materials.

[0013] Further, the flexible plate is integrally arc-shaped.

[0014] Further, in the above-mentioned ankle assist device for preventing lower limb venous thrombosis, it further comprises a pressure rod; a first chute is opened on the front side and the rear side of the support plate; several pressure rods for preventing the bottom plate from tilting up are slidably connected to each first chute, and a spring is arranged between the pressure rod and the support plate; the end of each pressure rod is telescopically arranged.

[0015] Furthermore, in the above-mentioned ankle assistor for preventing lower limb venous thrombosis, a pulling plate is further included; a plurality of pulling plates for improving the use stability of the bottom plate are slidably connected to the bottom plate.

[0016] Beneficial effects: The present invention realizes contacting with the user's leg through the soft plate, increasing the contact area with the user's leg, dispersing the pressure exerted by the air cylinder on the calf, and at the same time, the soft plate can also wrap the calf position, improving the comfort while increasing the protection ability of the device to the user;

[0017] The self-suction airbag jets air to the bottom of the user's foot, thereby blowing air to dissipate heat from the bottom of the foot, reducing sweat stains, and improving the comfort of the user during use;

[0018] By adjusting the distance between the bottom plate and the supporting plate, the self-suction airbag is wrapped in the middle, so that the self-suction airbag is used for buffering and shock absorption during walking and standing, and at the same time, it avoids the user's center of gravity being too high and unstable after wearing;

[0019] The pressing rod contacts the left side of the bottom plate, thereby providing a downward pressure on the left side of the bottom plate, making the bottom plate not easy to tilt when the user uses it, and ensuring the stability of the user during ankle rehabilitation;

[0020] The contact area between the bottom plate and the bed body is increased through the pulling plate, preventing the bottom plate from sinking into the bed body, and at the same time keeping the bottom plate and the bed body relatively flush, ensuring the effect of the user's rehabilitation training on the bed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the ankle assistor for preventing lower limb venous thrombosis of the present invention;

[0022] Figure 2 It is a three-dimensional structural schematic diagram of the combination of the soft plate and the air cylinder of the present invention;

[0023] Figure 3 It is a schematic diagram of the installation position of the self-suction airbag of the present invention;

[0024] Figure 4 It is an exploded view of the supporting plate, the bottom plate and the nut of the present invention;

[0025] Figure 5 It is a sectional view of the supporting plate of the present invention;

[0026] Figure 6 It is a three-dimensional structural schematic diagram of the combination of the pressing rod and the pulling plate of the present invention;

[0027] Figure 7 It is an unfolded state diagram of the pressing rod and the pulling plate of the present invention;

[0028] Figure 8 It is a three-dimensional structural schematic diagram of the present invention under flat training;

[0029] Figure 9 This is a test diagram under the flat training of the present invention, where the arrow marking indicates the motion state.

[0030] In the above drawings: 1 - guard plate, 1001 - threaded part, 1002 - rectangular groove, 2 - support plate, 2001 - first chute, 3 - first strap, 4 - bottom plate, 4001 - second chute, 5 - flexible plate, 6 - cylinder, 101 - nut, 102 - self - suction airbag, 103 - rubber folding frame, 104 - first one - way valve diaphragm, 105 - second one - way valve diaphragm, 106 - second strap, 107 - heat - insulating cotton, 201 - pressure rod, 202 - pull plate. Specific Embodiment

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] Embodiment 1

[0033] As Figures 1 - 5 shown, an ankle assist device for preventing lower - limb venous thrombosis includes a guard plate 1, a support plate 2, a first strap 3, a bottom plate 4 and a cylinder 6; the support plate 2 is rotatably connected to the guard plate 1; a number of first straps 3 are arranged on the support plate 2; the bottom plate 4 is connected to the guard plate 1; a cylinder 6 is jointly connected between the guard plate 1 and the support plate 2;

[0034] It further includes a flexible plate 5, a self - suction airbag 102, a rubber folding frame 103, a first one - way valve diaphragm 104 and a second one - way valve diaphragm 105; a number of rubber protrusions are arranged on the support plate 2; the flexible plate 5 is fixedly connected to the cylinder 6, and the flexible plate 5 is made of rubber material; the self - suction airbag 102 is fixedly connected to the bottom plate 4, and the self - suction airbag 102 is made of elastic rubber material; a number of air inlets are opened on the left side of the self - suction airbag 102, and a first one - way valve diaphragm 104 is fixedly connected to each air inlet on the self - suction airbag 102, and the first one - way valve diaphragm 104 opens towards the inside of the self - suction airbag 102; the rubber folding frame 103 is fixedly connected to the upper side of the self - suction airbag 102; the upper side of the rubber folding frame 103 is detachably connected to the support plate 2; a rectangular hole is opened on the upper side of the self - suction airbag 102, and the rectangular hole is located inside the rubber folding frame 103; a number of through - holes are opened on the support plate 2, and all the through - holes are directly above the inner space of the rubber folding frame 103; a second one - way valve diaphragm 105 is fixedly connected to each through - hole on the support plate 2, and the second one - way valve diaphragm 105 is set to open upwards.

[0035] It further includes a nut 101; two threaded portions 1001 are provided on the guard plate 1; two second sliding grooves 4001 are formed on the bottom plate 4, and the bottom plate 4 is slidably connected to the threaded portions 1001 through the second sliding grooves 4001; a nut 101 is rotatably connected to each threaded portion 1001.

[0036] It further includes a second strap 106 and a heat-insulating cotton 107; four rectangular grooves 1002 distributed in a rectangle are formed on the guard plate 1; a second strap 106 is slidably connected between two front and rear opposite rectangular grooves 1002; a heat-insulating cotton 107 is fixedly connected between each second strap 106 and the guard plate 1.

[0037] Both the first strap 3 and the second strap 106 are made of breathable materials, which can improve the breathability of the user during training and enhance the comfort.

[0038] The lower side of the bottom plate 4 is provided with rough textures, which can increase the friction between the bottom plate 4 and the ground and make the training more stable.

[0039] A number of rubber bumps are provided on the flexible plate 5, which are used to massage the calf position of the user and accelerate the blood circulation of the calf.

[0040] The guard plate 1, the support plate 2 and the bottom plate 4 are all made of light alloy materials, which can ensure the strength of the equipment and avoid the overall weight of the equipment from affecting the use of the user.

[0041] The flexible plate 5 is integrally arc-shaped, so that the flexible plate 5 can better wrap around the calf position.

[0042] When the user wears this equipment for training and prevents lower limb deep vein thrombosis, first place the calf on the guard plate 1, then place the sole of the foot on the support plate 2, and actively adjust the angle between the support plate 2 and the guard plate 1 to adapt to the curvature between the sole of the foot and the calf of the user. Use the first strap 3 to bind the sole of the user's foot to the support plate 2 to complete the wearing work; then the user places the bottom plate 4 on the ground and starts the cylinder 6 to reciprocate and stretch, pushing the support plate 2 to rotate on the guard plate 1, so that the angle between the guard plate 1 and the support plate 2 continuously changes. The cylinder 6 actively drives the support plate 2 to rotate to assist the user's ankle in performing plantar flexion and dorsiflexion movements.

[0043] When the sole of the foot makes a plantar flexion movement driven by the support plate 2, with the front-to-back view as the reference, the support plate 2 rotates counterclockwise with the connection point with the guard plate 1 as the rotation point. While the right end of the support plate 2 rises, it gradually moves to the left, causing the telescopic end of the cylinder 6 body to gradually approach the user's leg. Considering that the calf thicknesses of different users are different and the distance between the cylinder 6 and the user's leg cannot be adjusted, for users with thicker calves, the calf will be squeezed by the cylinder 6. Since the cylinder 6 is cylindrical as a whole, the contact area between the cylinder 6 and the user's leg is small, resulting in a large pressure on the calf position during training, causing discomfort to the user and even damaging the calf muscles of the user. Therefore, a soft plate 5 is provided on the cylinder 6. During the process of the cylinder 6 approaching the user's leg, the soft plate 5 is used to contact the user's leg. By means of the soft plate 5, the contact area with the user's leg is increased, the pressure exerted by the cylinder 6 on the calf is dispersed, and at the same time, the soft plate 5 contracts under force, reducing the pressure on the user's calf. At the same time, the soft plate 5 can also wrap the calf position to adapt to the calves of different users, avoiding a large pressure on the user's calf caused by the telescopic end of the cylinder 6 body during training, causing discomfort to the user and even damaging the calf muscles of the user. Further, a plurality of rubber bumps are provided on the soft plate 5, and the rubber bumps are used to squeeze and massage the calf, which helps the blood flow in the calf position of the user.

[0044] It is also considered that when it is hot in summer, the user's sole is in long-term contact with the upper side of the support plate 2, which will cause the sole to sweat, resulting in slippage between the sole and the support plate 2. At the same time, the sweat stains are also likely to cause discomfort to the user. Therefore, a plurality of rubber convex strips are provided on the support plate 2 to reduce the contact area between the sole and the support plate 2, and there is a gap between the sole and the support plate 2, which is conducive to ventilation and heat dissipation and reduces the sweating of the sole. At the same time, a self-suction airbag 102 is provided on the bottom plate 4, and the self-suction airbag 102 is connected to the support plate 2 through a rubber folding frame 103. When the support plate 2 drives the sole to plantar flex, the lower side of the support plate 2 contacts the self-suction airbag 102, and at this time the rubber folding frame 103 deforms adaptively. When the support plate 2 continues to rotate, the support plate 2 squeezes the self-suction airbag 102 to contract, so that the gas in the self-suction airbag 102 sprays towards the lower side of the support plate 2, and then the second one-way valve diaphragm 105 on the support plate 2 is opened, and then the gas directly acts on the bottom of the user's sole, thereby blowing air to dissipate heat from the bottom of the sole, further reducing the sweating of the sole and improving the comfort of the user during use. When the support plate 2 drives the dorsiflexion, the support plate 2 gradually separates from the self-suction airbag 102, and the self-suction airbag 102 loses the extrusion and resets. At this time, a negative pressure is formed in the self-suction airbag 102, and under the action of the external air pressure, the first one-way valve diaphragm 104 is pushed open, so that the external air is supplemented into the self-suction airbag 102. When the support plate 2 drives the sole to dorsiflex and the lower side of the support plate 2 contacts the self-suction airbag 102, the self-suction airbag 102 is also squeezed to start exhausting, and so on, to dissipate heat from the user's sole during the ankle training process.

[0045] It is considered that when the user needs to walk briefly or stand up and move independently during use, the user needs to take off the assistor from the calf to avoid too large a distance between the support plate 2 and the bottom plate 4, resulting in too high an overall center of gravity after the user stands, leading to instability during walking or standing and prone to falling. When the user takes off the assistor, the straps binding the calf and the sole need to be untied in turn, and the whole process is cumbersome and then needs to be worn again. Therefore, by providing a second chute 4001 on the bottom plate 4, when the user needs to walk briefly or stand, only need to turn the nut 101, and the nut 101 moves away from the bottom plate 4 on the threaded part 1001, so that the nut 101 stops locking the bottom plate 4. At this time, the user only needs to press down slightly with the sole, and the support plate 2 drives the guard plate 1 to move downward together. When the support plate 2 touches the upper surface of the self-suction airbag 102, the user then tightens the nut 101 to lock the bottom plate 4, so as to adjust the distance between the support plate 2 and the bottom plate 4, and avoid the user's unstable center of gravity when wearing the present invention and walking.

[0046] It should be noted that when the pallet 2 touches the upper surface of the self - suction airbag 102, the distance from the upper surface of the pallet 2 to the lower surface of the bottom plate 4 is equivalent to the thickness of a conventional sole; for the case where the sole thickness is inconsistent, the user can actively adjust the moving distance of the pallet 2.

[0047] It should be noted that when there is no air flow supply to drive the cylinder 6, the telescopic end of the cylinder 6 can move freely. That is, when the user wears the present invention and walks, the pallet 2 can adaptively rotate according to the bending of the user's foot when walking. Note that the principle of the cylinder 6 is common knowledge and will not be elaborated here. Moreover, when the user wears the present invention and walks, the self - suction airbag 102 is used for buffering and shock absorption to improve comfort.

[0048] It is also considered that for the convenience of different users' usage requirements, the nut 101 can be completely unscrewed from the threaded part 1001. Then, after removing the rubber folding frame 103 from the bottom of the pallet 2, the user can pull the bottom plate 4 away from the threaded part 1001 and remove the bottom plate 4 from the guard plate 1, and then walk or stand briefly by wearing the guard plate 1 and the pallet 2.

[0049] Regarding the different calf thicknesses of different users, the user can move the second strap 106 on the guard plate 1 by pulling it, so as to adjust the second strap 106 to the most comfortable and required binding position according to the different needs of the user and the calf thickness, improving the adaptability of the device; and when the second strap 106 moves on the guard plate 1, the second strap 106 synchronously stretches the heat - insulating cotton 107, and the heat - insulating cotton 107 cooperates with the second strap 106 to limit the range of calf movement to ensure the stable progress of training; at the same time, it is also considered that in winter, in order to keep warm, users usually wear multiple layers of pants, resulting in difficulty in placing the calves on the guard plate 1 with a fixed width. In order to ensure that the calves can be placed on the guard plate 1 for rehabilitation training, it is necessary to artificially reduce the pants on the user's legs at this time, which is likely to cause the user's calves to catch cold. At this time, by pulling the second strap 106 to the bottom end of the rectangular groove 1002, the heat - insulating cotton 107 can be fully unfolded, and the heat - insulating cotton 107 cooperates with the second strap 106 to keep warm the exposed position of the calf.

[0050] Embodiment 2

[0051] Based on Embodiment 1, as Figures 6 - 9 shown, it further includes a pressure rod 201; a first chute 2001 is provided on both the front side and the rear side of the pallet 2; two pressure rods 201 are slidably connected to each first chute 2001, and a spring is provided between the pressure rod 201 and the pallet 2; the end of each pressure rod 201 is telescopically arranged. It further includes a pull - plate 202; two pull - plates 202 are slidably connected to the bottom plate 4.

[0052] When the user is lying flat on his back, the plantar flexion training is based on the front-to-back view. Figure 9 As shown, at this time, the cylinder 6 begins to contract, causing the support plate 2 and the sole of the foot to rotate counterclockwise with the connection between the guard plate 1 as the rotation point, thereby causing the heel to gradually move backwards, and at the same time, the right side of the guard plate 1 also rotates downward, thereby causing the force point of the bottom plate 4 to gradually approach its right side. As the sole of the foot continues to perform plantar flexion, the left side of the bottom plate 4 is easily tilted upward, making the entire bottom plate 4 unstable during training. Therefore, the pressure rod 201 is pulled to the position shown in FIG. Figure 8 As shown in the state close to the left side of the support plate 2, the spring between the pressure rod 201 and the support plate 2 is stretched, and then the end of the pressure rod 201 is pulled out, so that the pressure rod 201 is always attached to the left side of the bottom plate 4 under the stretching action of the spring, thereby applying a pressure to the left side of the bottom plate 4. As the support plate 2 rotates counterclockwise, the distance between the left side of the support plate 2 and the left side of the bottom plate 4 gradually becomes smaller, so that the pressure rod 201 gradually moves to the left along the bottom plate 4 in the first slide groove 2001, and at the same time, a downward pressure is applied to the left side of the bottom plate 4, so that the bottom plate 4 is not easy to be tilted when the user uses it. To ensure the stability of the user during ankle rehabilitation, when the user performs dorsiflexion, the cylinder 6 drives the support plate 2 to rotate clockwise, so that the heel gradually moves forward. During the rotation of the support plate 2, the support plate 2 drives the entire sole of the foot to apply a force to the bottom plate 4 that gradually tilts downward from right to left. At the same time, when the user performs dorsiflexion, the calf will move upward relatively, and then drive the guard plate 1 upward under the restriction of the first strap 3 and the second strap 106. At this time, the bottom plate 4 is affected by the gravity of the calf and the reaction force when the guard plate 1 moves upward, so that the bottom plate 4 is relatively stable during dorsiflexion.

[0053] It is also considered that when training while lying flat on the bed, since the bed body is relatively soft, the weight of the calf and the sole of the foot is applied to the bottom plate 4 during the use of the bottom plate 4, which is easy to cause the bed body to sag, and then cause the bottom plate 4 to tilt and sink into the bed body, which will cause the bending of the sole of the foot and the rotation of the ankle of the user to be not in a horizontal state during the ankle rehabilitation training. Therefore, by pulling the pull plate 202 out of the bottom plate 4 to the position as shown in the figure, the bottom plate 4 can be adjusted to the horizontal position. Figure 7 As shown, the contact area between the bottom plate 4 and the bed body is increased to prevent the bottom plate 4 from sinking into the bed body, while keeping the bottom plate 4 and the bed body relatively flush, thereby ensuring the effect of the user's rehabilitation training on the bed.

[0054] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. An ankle assistor for preventing lower limb venous thrombosis, comprising a guard plate (1), a support plate (2), a first strap (3), a bottom plate (4) and a cylinder (6); the support plate (2) is rotatably connected to the guard plate (1); a plurality of first straps (3) are arranged on the support plate (2); the bottom plate (4) is connected to the guard plate (1); a cylinder (6) is commonly connected between the guard plate (1) and the support plate (2); it is characterized in that, It also includes a flexible board (5), a self - suction airbag (102), a rubber folding frame (103), a first one - way valve diaphragm (104) and a second one - way valve diaphragm (105); several rubber ridges are provided on the support plate (2); a flexible board (5) for improving comfort is fixedly connected to the air cylinder (6); a self - suction airbag (102) for improving the heat dissipation effect is fixedly connected to the bottom plate (4); several air inlet holes are provided on the left side of the self - suction airbag (102), and a first one - way valve diaphragm (104) is fixedly connected to each air inlet hole of the self - suction airbag (102), and the first one - way valve diaphragm (104) opens towards the inside of the self - suction airbag (102); a rubber folding frame (103) is fixedly connected to the upper side of the self - suction airbag (102); the upper side of the rubber folding frame (103) is detachably connected to the support plate (2); a rectangular hole is provided on the upper side of the self - suction airbag (102), and the rectangular hole is located inside the rubber folding frame (103); several through - holes are provided on the support plate (2), and all the through - holes are directly above the inner space of the rubber folding frame (103); a second one - way valve diaphragm (105) is fixedly connected to each through - hole of the support plate (2), and the second one - way valve diaphragm (105) is set to open upwards.

2. The ankle assistor for preventing lower limb venous thrombosis according to claim 1, characterized in that, It also includes a nut (101); at least two threaded parts (1001) are provided on the guard plate (1); at least two second sliding grooves (4001) are provided on the bottom plate (4), and the bottom plate (4) is slidably connected to the threaded parts (1001) through the second sliding grooves (4001); a nut (101) for locking the bottom plate (4) is rotatably connected to each threaded part (1001).

3. The ankle assistor for preventing lower limb venous thrombosis according to claim 1, wherein It also includes a second strap (106) and a heat - insulating cotton (107); at least four rectangular grooves (1002) distributed in a rectangle are provided on the guard plate (1); a second strap (106) is slidably connected between two relatively front - and - rear rectangular grooves (1002); a heat - insulating cotton (107) for heat preservation is fixedly connected between each second strap (106) and the guard plate (1).

4. An ankle assistor for preventing lower limb venous thrombosis according to claim 3, characterized in that, Both the first strap (3) and the second strap (106) are made of breathable materials.

5. The ankle assistor for preventing lower limb venous thrombosis according to claim 1, characterized in that, The lower side of the bottom plate (4) is provided with rough textures.

6. The ankle assistor for preventing lower limb venous thrombosis according to claim 1, wherein, Several rubber bumps are provided on the flexible board (5).

7. An ankle assist device for preventing lower limb deep vein thrombosis according to claim 5, characterized in that, The guard plate (1), the support plate (2) and the bottom plate (4) are all made of light alloy materials.

8. An ankle assist device for preventing lower limb venous thrombosis according to claim 6, characterized in that, The flexible board (5) is integrally arc - shaped.

9. An ankle assist device for preventing lower limb venous thrombosis according to claim 1, characterized in that, It also includes a pressure rod (201); a first sliding groove (2001) is provided on both the front side and the rear side of the support plate (2); several pressure rods (201) for preventing the bottom plate (4) from tilting upwards are slidably connected to each first sliding groove (2001), and a spring is provided between the pressure rod (201) and the support plate (2); the end of each pressure rod (201) is telescopically arranged.

10. The ankle assistor for preventing lower limb venous thrombosis according to claim 1, characterized in that, It also includes a pull plate (202); several pull plates (202) for improving the use stability of the bottom plate (4) are slidably connected to the bottom plate (4).

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