Passive ankle joint exerciser for preventing lower limb deep vein thrombosis

Abstract

The invention relates to the technical field of health care instruments, in particular to a passive ankle joint exerciser for preventing lower limb deep venous thrombosis, which comprises a leg backup plate, a bottom plate is fixedly mounted on the side wall of the bottom end of the leg backup plate, and a movement driving assembly is rotatably mounted on the rear side wall of the leg backup plate; the motion driving assembly comprises a driving foot plate rotationally installed on the rear side wall of the leg backup plate, and a foot sleeve is fixedly installed on the upper end face of the driving foot plate. The leg backup plate and the driving foot plate are each provided with a detection counting assembly, each detection counting assembly comprises a counting sensor fixedly installed in the leg backup plate, an ultrasonic probe is arranged on the upper end face of the driving foot plate, and a control module is fixedly installed on the side wall of the leg backup plate. Blood flow at the deep vein is detected through ultrasonic waves emitted by the ultrasonic probe, the control module receives data information of the ultrasonic probe and the counting sensor, the data information is processed and displayed on the display screen, and therefore a user can conveniently know the motion effect of ankles.

Description

Technical Field

[0001] The present invention relates to the technical field of healthcare devices, and particularly to a passive ankle exerciser for preventing deep vein thrombosis in the lower extremities. Background Art

[0002] A passive ankle exerciser for preventing deep vein thrombosis in the lower extremities is a device that helps patients who are bedridden or unable to move independently perform passive ankle movements. The passive ankle exerciser simulates the flexion, extension, and circumduction movements of the ankle joint through a mechanical device to promote blood circulation in the lower extremities. This is particularly important for bedridden patients because they often have slow blood flow due to lack of exercise, increasing the risk of deep vein thrombosis. The passive ankle exerciser is mainly applicable to patients who are unable to perform ankle movements independently, such as those in a coma, completely bedridden, postoperative patients, etc. It can help such patients maintain the mobility of the ankle joint and reduce the risk of thrombosis. When using the passive ankle exerciser, a caregiver or family member can adjust the device to make the patient's ankle joint perform appropriate flexion, extension, and circumduction movements. Usually, these movements are carried out within a painless or slightly painful range, and the amplitude and frequency of the movements can be adjusted according to the specific situation of the patient.

[0003] In the existing technical solutions, rotating the ankle can accelerate the velocity of venous blood flow and prevent thrombosis. However, some people cannot persevere in active exercise and need to rely on a device to assist in rotating the ankle. Generally, the auxiliary device cannot detect the blood flow velocity of the ankle vein at the ankle, making it inconvenient to understand the exercise effect of the ankle. Summary of the Invention

[0004] The purpose of the present invention is to provide a passive ankle exerciser for preventing deep vein thrombosis in the lower extremities. The ultrasonic waves emitted by an ultrasonic probe are used to detect the blood flow at the deep vein. The control module receives the data information from the ultrasonic probe and the counting sensor, processes it, and displays the data information on the display screen, thereby facilitating the user to understand the exercise effect of the ankle and solving the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A passive ankle exerciser for preventing deep vein thrombosis in the lower extremities, including a leg rest board. A bottom plate is fixedly installed on the bottom side wall of the leg rest board. A motion driving assembly is rotatably installed on the rear side wall of the leg rest board. The motion driving assembly includes a driving foot board rotatably installed on the rear side wall of the leg rest board, and a foot sleeve is fixedly installed on the upper end surface of the driving foot board. Detection and counting components are provided on both the leg rest board and the driving foot board. The detection and counting components include a counting sensor fixedly installed inside the leg rest board, an ultrasonic probe is provided on the upper end surface of the driving foot board, and a control module is fixedly installed on the side wall of the leg rest board.

[0006] Preferably, a display screen is embedded on the front end face of the control module, and the control module is electrically connected to the ultrasonic probe and the counting sensor.

[0007] Preferably, the motion driving assembly further includes a first ball groove formed on the rear side wall of the leg rest board. A first universal ball is rotatably installed inside the first ball groove. A connecting support rod is fixedly installed on the side wall of the first universal ball, and the connecting support rod is fixedly connected to the driving foot board.

[0008] Preferably, a flexion and extension assembly is arranged on the upper end face of the bottom plate. The flexion and extension assembly includes an electric cylinder fixedly installed at the middle position of the upper end face of the bottom plate. The telescopic end of the electric cylinder is provided with a driving guide slider, and a hinge is installed between the driving guide slider and the electric cylinder.

[0009] Preferably, a driving chute is formed at the middle position of the bottom end face of the driving foot board. A guiding slide rod is fixedly installed at the middle position of the driving chute. The driving chute, the guiding slide rod and the driving guide slider are slidably connected.

[0010] Preferably, a deflection matching assembly is arranged on the upper end face of the bottom plate. The deflection matching assembly includes cylinders fixedly installed on both sides of the upper end face of the bottom plate. A rubber plug is slidably fitted inside the cylinder, and a telescopic rod is fixedly installed on the upper end face of the rubber plug.

[0011] Preferably, a regulation groove is formed at the upper end inside the telescopic rod. A buffer regulation rod is slidably installed inside the regulation groove. A second universal ball is fixedly installed at the top end of the buffer regulation rod. A second ball groove is formed at the corresponding position of the bottom end face of the driving foot board and the second universal ball.

[0012] Preferably, a first communication air pipe penetrates and communicates through the bottom end inner wall of the cylinder. A first electromagnetic control valve is fixedly installed on the pipe wall of the first communication air pipe. A first electromagnetic discharge valve pipe is fixedly communicated with the bottom end side wall of the cylinder.

[0013] Preferably, fixing and assisting assemblies are arranged on both the bottom plate and the driving foot board. The fixing and assisting assemblies include an air pump fixedly installed at the front end of the upper end face of the bottom plate. The output end of the air pump is fixedly communicated with a second communication air pipe, and a second electromagnetic control valve is fixedly installed on the pipe wall of the second communication air pipe.

[0014] Preferably, an auxiliary pressing air cushion is fixedly installed on the inner wall of the foot sleeve. The end of the auxiliary pressing air cushion is fixedly communicated with a second electromagnetic discharge valve pipe, and the auxiliary pressing air cushion is embedded between the inner side wall and the ultrasonic probe.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. Through the mutual cooperation of the flexion and extension component and the deflection cooperation component, the present invention can drive the patient's foot to perform flexion and extension and deflection movements by the driving foot plate, so that the patient's ankle can be fully exercised. There are many blood vessels and lymphatic vessels at the ankle. When the foot performs flexion and extension and deflection movements, the muscles are continuously stretched and relaxed. This muscle movement is like a "pump" that can exert a squeezing effect on the blood vessels and lymphatic vessels. This continuous muscle pump effect can effectively accelerate the blood flow rate in the lower limbs and reduce blood stasis in the veins. For patients who are bedridden or sedentary for a long time, this can significantly reduce the risk of deep vein thrombosis in the lower limbs.

[0016] 2. The ultrasonic probe provided by the present invention is made of piezoelectric wafers, which can not only convert electrical energy into ultrasonic waves but also convert the reflected ultrasonic waves into electrical energy. When detecting the venous flow rate of the ankle, the probe emits ultrasonic beams. These ultrasonic beams enter the blood vessels at the ankle of the human body and generate reflected waves after encountering moving targets such as blood cells. The transducer receives the reflected waves and converts them into electrical signals, thereby obtaining blood flow information. The control module receives the data information of the ultrasonic probe and the counting sensor, processes it, and displays the data information on the display screen, so as to facilitate the user to understand the movement effect of the ankle.

[0017] 3. The increase in the internal gas of the auxiliary pressing air cushion of the present invention can cause it to expand. The expanded auxiliary pressing air cushion can squeeze and fix the patient's foot, which can further improve the fixing effect on the patient's foot on the basis of the foot sleeve limitation. At the same time, the squeezing and fixing effect of the elastic structure of the auxiliary pressing air cushion on the patient's foot can also improve the comfort of the user's foot movement. At the same time, through the squeezing and fixing of the auxiliary pressing air cushion, it can drive the ultrasonic probe to fit with the patient's foot and ankle, so that the ultrasonic waves emitted by the ultrasonic probe can detect the blood flow at the deep vein, thereby enabling the auxiliary pressing air cushion to ensure the fixation of the ultrasonic probe position and ensure the stability of the ultrasonic probe during detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall structural view of the present invention; Figure 2 is the schematic diagram of the internal sectional structure of the leg backrest of the present invention; Figure 3 is the schematic diagram of the internal sectional structure of the foot sleeve of the present invention; Figure 4 is the schematic diagram of the internal sectional structure of the driving foot plate of the present invention; Figure 5 is the schematic diagram of the structure of the deflection cooperation component of the present invention; Figure 6 is the schematic diagram of the structure of the flexion and extension component of the present invention; Figure 7 is the schematic diagram of the back structure of the driving foot plate of the present invention.

[0019] Description of reference numerals: 1. Leg rest board; 2. Bottom board; 3. Flexion and extension component; 301. Electric cylinder; 302. Hinge; 303. Driving guide slider; 304. Driving chute; 305. Guide slide bar; 4. Motion driving component; 401. Driving foot board; 402. Connecting support rod; 403. First universal ball; 404. First ball groove; 405. Second ball groove; 406. Foot sleeve; 5. Deflection fitting component; 501. Cylinder body; 502. Telescopic rod; 503. Buffer control rod; 504. Second universal ball; 505. Control groove; 506. Rubber plug; 507. First electromagnetic discharge valve pipe; 508. First connecting air pipe; 509. First electromagnetic control valve; 6. Fixed auxiliary component; 601. Air pump; 602. Auxiliary pressing air cushion; 603. Second connecting air pipe; 604. Second electromagnetic control valve; 605. Second electromagnetic discharge valve pipe; 7. Detection and counting component; 701. Display screen; 702. Counting sensor; 703. Ultrasonic probe; 704. Control module. Detailed implementation manners

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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.

[0021] The present invention provides a technical solution: Please refer to Figure 1 、 Figure 6 and Figure 7 A passive ankle exerciser for preventing deep vein thrombosis of the lower extremities, including a leg rest board 1. A bottom board 2 is fixedly installed on the bottom side wall of the leg rest board 1. A motion driving component 4 is rotatably installed on the rear side wall of the leg rest board 1. The motion driving component 4 includes a driving foot board 401 rotatably installed on the rear side wall of the leg rest board 1. A foot sleeve 406 is fixedly installed on the upper end surface of the driving foot board 401. The structure of the foot sleeve 406 is a semi-circular structure; The motion drive assembly 4 further includes a first ball groove 404 formed on the rear side wall of the leg rest plate 1. A first universal ball 403 is rotatably installed inside the first ball groove 404. A connecting support rod 402 is fixedly installed on the side wall of the first universal ball 403. The connecting support rod 402 is fixedly connected to the drive foot plate 401. A flexion and extension assembly 3 is provided on the upper end surface of the bottom plate 2. The flexion and extension assembly 3 includes an electric cylinder 301 fixedly installed at the middle position of the upper end surface of the bottom plate 2. A drive guide slider 303 is installed at the telescopic end of the electric cylinder 301. A hinge 302 is installed between the drive guide slider 303 and the electric cylinder 301. A drive chute 304 is formed at the middle position of the bottom end surface of the drive foot plate 401. A guide slide rod 305 is fixedly installed at the middle position of the drive chute 304. The drive chute 304, the guide slide rod 305 and the drive guide slider 303 are slidably connected. The guide slide rod 305 and the drive guide slider 303 can rotate. The upper end surface of the drive guide slider 303 is of an arc-shaped structure.

[0022] By adopting the above technical solution, when in use, the leg rest plate 1 and the bottom plate 2 are placed in appropriate positions. The foot of the patient that needs exercise is placed in the foot sleeve 406 of the drive foot plate 401. The electric cylinder 301 is started. The operation of the electric cylinder 301 can drive the hinge 302 and the drive guide slider 303 to move. Through the telescoping of the electric cylinder 301, the drive guide slider 303 can be pushed to move upward or downward. When the drive guide slider 303 moves upward, the drive guide slider 303 can slide on the guide slide rod 305 inside the drive foot plate 401 through the hinge 302, and the moving drive guide slider 303 is limited by the guide slide rod 305, thereby ensuring the stability of the drive guide slider 303 during movement. When the drive guide slider 303 moves upward, the drive guide slider 303 can push the drive foot plate 401 to move upward. The drive foot plate 401 can drive the first universal ball 403 to rotate in the first ball groove 404 through the connecting support rod 402. In this way, by moving the drive guide slider 303 upward or downward, the drive foot plate 401 can be driven to move upward or downward, so that the drive foot plate 401 can drive the ankle of the patient's foot to perform flexion and extension movements. It should be noted that there is sufficient space between the leg rest plate 1 and the foot sleeve 406, which is convenient for the patient to put the foot into the foot sleeve 406 for ankle movement. The provided leg rest plate 1 facilitates the patient to lean on the leg.

[0023] Specifically, such as Figure 1 、 Figure 4 、 Figure 5 and Figure 7As shown in the figure, a deflection fitting assembly 5 is provided on the upper end surface of the bottom plate 2. There are two sets of the deflection fitting assembly 5 arranged symmetrically, so as to push the driving foot plate 401 to deflect left and right from both the left and right sides respectively. The deflection fitting assembly 5 includes cylinders 501 fixedly installed on both sides of the upper end surface of the bottom plate 2. A rubber plug 506 is slidably fitted inside the cylinder 501. A telescopic rod 502 is fixedly installed on the upper end surface of the rubber plug 506. A regulation groove 505 is opened at the upper end inside the telescopic rod 502. A buffer regulation rod 503 is slidably installed inside the regulation groove 505. A second universal ball 504 is fixedly installed at the top end of the buffer regulation rod 503. A second ball groove 405 is opened at the corresponding position of the bottom end surface of the driving foot plate 401 and the second universal ball 504. A first communication air pipe 508 penetrates and communicates with the bottom inner wall of the cylinder 501. A first electromagnetic control valve 509 is fixedly installed on the pipe wall of the first communication air pipe 508. A first electromagnetic discharge valve pipe 507 is fixedly communicated with the bottom side wall of the cylinder 501.

[0024] By adopting the above technical solution, when the flexion and extension assembly 3 moves, the first electromagnetic control valve 509 is synchronously started. When the first electromagnetic control valve 509 is opened, the gas inside the first communication air pipe 508 can be pumped into the cylinder 501. The increase of the gas inside the cylinder 501 can push the rubber plug 506 to move upward. The movement of the rubber plug 506 can drive the telescopic rod 502 to move upward. The movement of the telescopic rod 502 can make the buffer regulation rod 503 retract into the regulation groove 505. After the buffer regulation rod 503 is completely retracted into the regulation groove 505, the continuous upward movement of the telescopic rod 502 can make the buffer regulation rod 503 push the driving foot plate 401 to move. The front end of the driving foot plate 401 can drive the first universal ball 403 to deflect in the first ball groove 404 through the connecting strut 402. At the same time, the driving foot plate 401 itself can rotate on the driving guide slider 303 through the guide slide rod 305. At the same time, for the deflection fitting assembly 5 on the symmetrical side, under the bias extrusion of the driving foot plate 401, the buffer regulation rod 503 on the symmetrical side can be retracted into the regulation groove 505. It should be noted that the gas inside the cylinder 501 can pass through. In this way, through the mutual cooperation of the flexion and extension assembly 3 and the deflection fitting assembly 5, the driving foot plate 401 can drive the patient's foot to perform flexion and extension deflection movements, so that the patient's ankle can be fully exercised. There are many blood vessels and lymphatic vessels at the ankle. When the foot performs flexion and extension deflection movements, the muscles are continuously stretched and relaxed. This kind of muscle movement is like a "pump", which can produce a squeezing effect on the blood vessels and lymphatic vessels. This continuous muscle pump effect can effectively accelerate the blood flow rate in the lower limbs and reduce the stasis of blood in the veins. For patients who are bedridden or sedentary for a long time, this can significantly reduce the risk of deep vein thrombosis in the lower limbs.

[0025] Specifically, as Figures 1 to 5As shown in the figure, fixed auxiliary components 6 are provided on both the bottom plate 2 and the driving foot plate 401. The fixed auxiliary component 6 includes an air pump 601 fixedly installed at the front end of the upper end surface of the bottom plate 2. The output end of the air pump 601 is fixedly connected to a second connecting air pipe 603. A second electromagnetic control valve 604 is fixedly installed on the pipe wall of the second connecting air pipe 603. An auxiliary pressing air cushion 602 is fixedly installed on the inner wall of the foot sleeve 406. The end of the auxiliary pressing air cushion 602 is fixedly connected to a second electromagnetic discharge valve pipe 605. The inner side wall of the auxiliary pressing air cushion 602 is embedded between it and the ultrasonic probe 703.

[0026] Detection and counting components 7 are provided on both the leg rest plate 1 and the driving foot plate 401. The detection and counting component 7 includes a counting sensor 702 installed inside the leg rest plate 1. An ultrasonic probe 703 is provided on the upper end surface of the driving foot plate 401. A control module 704 is fixedly installed on the side wall of the leg rest plate 1. A display screen 701 is embedded on the front end surface of the control module 704. The control module 704 is electrically connected to the ultrasonic probe 703 and the counting sensor 702.

[0027] By adopting the above technical solution, during use, place the foot of the patient that needs to exercise on the foot sleeve 406 of the driving foot plate 401. The foot sleeve 406 initially limits the patient's foot. At the same time, when exercising, start the air pump 601. While the air pump 601 is working, the second electromagnetic control valve 604 can be opened, so that the gas in the second connecting air pipe 603 can be introduced into the auxiliary pressing air cushion 602. The increase of the gas inside the auxiliary pressing air cushion 602 can cause it to expand. The expanded auxiliary pressing air cushion 602 can squeeze and fix the patient's foot, which can further improve the fixing effect on the patient's foot on the basis of the limitation of the foot sleeve 406. At the same time, the squeezing and fixing effect of the elastic auxiliary pressing air cushion 602 on the patient's foot can also improve the comfort of the user's foot during movement. At the same time, through the squeezing and fixing of the auxiliary pressing air cushion 602, it can drive the ultrasonic probe 703 to fit with the patient's foot and ankle, so that the ultrasonic waves emitted by the ultrasonic probe 703 can detect the blood flow in the deep vein. In this way, the auxiliary pressing air cushion 602 ensures the fixation of the position of the ultrasonic probe 703 and the stability of the ultrasonic probe 703 during detection. When the exercise is over, the gas inside the auxiliary pressing air cushion 602 can be discharged through the second electromagnetic discharge valve pipe 605, so as to release the squeezed foot.

[0028] The provided ultrasonic probe 703 is made of piezoelectric wafers, which can not only convert electrical energy into ultrasonic waves but also convert the reflected ultrasonic waves back into electrical energy. When detecting the blood flow velocity of the ankle vein, the probe emits ultrasonic beams. These ultrasonic beams enter the blood vessels at the ankle of the human body and generate reflected waves after encountering moving targets such as blood cells. The transducer receives the reflected waves and converts them into electrical signals, thereby obtaining blood flow information and transmitting the obtained information to the control module 704. The control module 704 includes a transmitting circuit, a receiving circuit, a signal processing circuit, and a control circuit. The control circuit is also used to control various functional operations of the device. The counting sensor 702 can be installed on the leg support plate 1 or the driving foot plate 401. The counting sensor 702 is composed of a gyroscope and a Hall sensor. The gyroscope is used to detect the angular velocity of the ankle. The Hall sensor is used in conjunction with a magnet. When the ankle rotates, the magnet will also rotate accordingly. The Hall sensor can detect the change in magnetic field strength and thus generate a pulse signal. By combining the signals of the gyroscope and the Hall sensor, the control circuit can more accurately judge the rotation of the ankle. The control module 704 receives the data information of the ultrasonic probe 703 and the counting sensor 702, processes it, and displays the data information on the display screen 701, so as to facilitate the user to understand the exercise effect of the ankle.

[0029] Working principle: When in use, place the leg support plate 1 and the bottom plate 2 in appropriate positions, and place the foot of the patient that needs to be exercised in the foot sleeve 406 of the driving foot plate 401. The foot sleeve 406 initially limits the patient's foot. At the same time, when exercising, start the air pump 601. While the air pump 601 is working, the second electromagnetic control valve 604 can be opened, so that the gas in the second connecting air pipe 603 can be introduced into the auxiliary pressing air cushion 602. The increase in the gas inside the auxiliary pressing air cushion 602 can cause it to expand. The expanded auxiliary pressing air cushion 602 can squeeze and fix the patient's foot, which can further improve the fixing effect on the patient's foot on the basis of the limitation of the foot sleeve 406. Through the squeezing and fixing of the auxiliary pressing air cushion 602, it can drive the ultrasonic probe 703 to fit with the patient's foot and ankle. When performing ankle movement, the electric cylinder 301 is activated. The operation of the electric cylinder 301 can drive the hinge 302 and the driving guide slider 303 to move. Through the telescoping of the electric cylinder 301, the driving guide slider 303 can be pushed to move upward or downward. When the driving guide slider 303 moves upward, the driving guide slider 303 can slide on the guide slide bar 305 inside the driving foot plate 401 through the hinge 302, and the moving driving guide slider 303 is limited by the guide slide bar 305, thereby ensuring the stability of the driving guide slider 303 during movement. When the driving guide slider 303 moves upward, the driving guide slider 303 can push the driving foot plate 401 to move upward. The driving foot plate 401 can drive the first universal ball 403 to rotate in the first ball groove 404 through the connecting strut 402. In this way, by moving the driving guide slider 303 upward or downward, the driving foot plate 401 can be driven to move upward or downward, so that the driving foot plate 401 can drive the patient's foot and ankle to perform flexion and extension movements. When the flexion and extension assembly 3 is in motion, the first electromagnetic control valve 509 is synchronously activated. The opening of the first electromagnetic control valve 509 can pump the gas inside the first connecting air pipe 508 into the cylinder body 501. By increasing the gas inside the cylinder body 501, the rubber plug 506 can be pushed to move upward. The movement of the rubber plug 506 can drive the telescopic rod 502 to move upward. Through the movement of the telescopic rod 502, the buffer control rod 503 can be retracted into the control groove 505. When the buffer control rod 503 is completely retracted into the control groove 505, the continuous upward movement of the telescopic rod 502 can cause the buffer control rod 503 to push the driving foot plate 401 to move. The front end of the driving foot plate 401 can drive the first universal ball 403 to deflect in the first ball groove 404 through the connecting strut 402. At the same time, the driving foot plate 401 itself can rotate on the driving guide slider 303 through the guide slide bar 305. At the same time, for the deflection matching assembly 5 on the symmetric side, under the bias extrusion of the driving foot plate 401, the buffer control rod 503 on the symmetric side can be retracted into the control groove 505; The provided ultrasonic probe 703 is made of piezoelectric wafers, which can not only convert electrical energy into ultrasonic waves but also convert the reflected ultrasonic waves back into electrical energy. When detecting the blood flow velocity of the ankle vein, the probe emits ultrasonic beams. These ultrasonic beams enter the blood vessels at the ankle of the human body and generate reflected waves after encountering moving targets such as blood cells. The transducer receives the reflected waves and converts them into electrical signals, thereby obtaining blood flow information and being able to transmit the obtained information to the control module 704. The control module 704 includes a transmitting circuit, a receiving circuit, a signal processing circuit, and a control circuit. The control circuit is also used to control various functional operations of the device. The counting sensor 702 can be installed on the leg rest 1 or the driving foot plate 401. The counting sensor 702 is composed of a combination of a gyroscope and a Hall sensor. The gyroscope is used to detect the angular velocity of the ankle. The Hall sensor is used in conjunction with a magnet. When the ankle rotates, the magnet will also rotate accordingly. The Hall sensor can detect the change in the magnetic field intensity, thereby generating a pulse signal. By combining the signals of the gyroscope and the Hall sensor, the control circuit can more accurately judge the rotation situation of the ankle. The control module 704 receives the data information of the ultrasonic probe 703 and the counting sensor 702, and after processing, displays the data information on the display screen 701, thus facilitating the user to understand the movement effect of the ankle.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features. However, such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A passive ankle exerciser for preventing deep vein thrombosis of the lower extremities, including a leg rest board (1), characterized in that: A bottom plate (2) is fixedly installed on the bottom side wall of the leg rest board (1). A motion driving component (4) is rotatably installed on the rear side wall of the leg rest board (1). The motion driving component (4) includes a driving foot plate (401) rotatably installed on the rear side wall of the leg rest board (1), and a foot sleeve (406) is fixedly installed on the upper end surface of the driving foot plate (401). Detection and counting components (7) are arranged on both the leg rest board (1) and the driving foot plate (401). The detection and counting component (7) includes a counting sensor (702) fixedly installed inside the leg rest board (1), an ultrasonic probe (703) is arranged on the upper end surface of the driving foot plate (401), and a control module (704) is fixedly installed on the side wall of the leg rest board (1).

2. The passive ankle exerciser for preventing deep vein thrombosis of lower limbs according to claim 1, characterized in that: A display screen (701) is embedded on the front end surface of the control module (704). The control module (704) is electrically connected to the ultrasonic probe (703) and the counting sensor (702).

3. The passive ankle exerciser for preventing deep vein thrombosis of lower limbs according to claim 1, characterized in that: The motion driving component (4) further includes a first ball groove (404) opened on the rear side wall of the leg rest board (1). A first universal ball (403) is rotatably installed inside the first ball groove (404). A connecting support rod (402) is fixedly installed on the side wall of the first universal ball (403), and the connecting support rod (402) is fixedly connected to the driving foot plate (401).

4. The passive ankle exerciser for preventing deep vein thrombosis of lower limbs according to claim 1, characterized in that: A flexion and extension component (3) is arranged on the upper end surface of the bottom plate (2). The flexion and extension component (3) includes an electric cylinder (301) fixedly installed at the middle position of the upper end surface of the bottom plate (2). A driving guide slider (303) is installed at the telescopic end of the electric cylinder (301), and a hinge (302) is installed between the driving guide slider (303) and the electric cylinder (301).

5. The passive ankle exerciser for preventing deep vein thrombosis of lower limbs according to claim 4, characterized in that: A driving chute (304) is opened at the middle position of the bottom end surface of the driving foot plate (401). A guide slide rod (305) is fixedly installed at the middle position of the driving chute (304). The driving chute (304), the guide slide rod (305) and the driving guide slider (303) are slidably connected to each other.

6. The passive ankle exerciser for preventing deep vein thrombosis of lower limbs according to claim 1, characterized in that: A deflection matching component (5) is arranged on the upper end surface of the bottom plate (2). The deflection matching component (5) includes cylinders (501) fixedly installed on both sides of the upper end surface of the bottom plate (2). A rubber plug (506) is slidably fitted inside the cylinder (501), and a telescopic rod (502) is fixedly installed on the upper end surface of the rubber plug (506).

7. The passive ankle exerciser for preventing deep vein thrombosis of lower limbs according to claim 6, characterized in that: A regulation groove (505) is opened at the upper end inside the telescopic rod (502). A buffer regulation rod (503) is slidably installed inside the regulation groove (505). A second universal ball (504) is fixedly installed at the top end of the buffer regulation rod (503). A second ball groove (405) is opened at the corresponding position of the bottom end surface of the driving foot plate (401) and the second universal ball (504).

8. The passive ankle exerciser for preventing deep vein thrombosis of lower limbs according to claim 7, characterized in that: A first communication air pipe (508) penetrates and communicates with the inner wall of the bottom end of the cylinder block (501), and a first electromagnetic control valve (509) is fixedly installed on the pipe wall of the first communication air pipe (508). A first electromagnetic discharge valve pipe (507) is fixedly communicated with the side wall of the bottom end of the cylinder block (501).

9. The passive ankle exerciser for preventing deep vein thrombosis of lower limbs according to claim 1, characterized in that: Fixing auxiliary components (6) are arranged on both the bottom plate (2) and the driving foot plate (401). The fixing auxiliary components (6) include an air pump (601) fixedly installed at the front end of the upper surface of the bottom plate (2). The output end of the air pump (601) is fixedly communicated with a second communication air pipe (603), and a second electromagnetic control valve (604) is fixedly installed on the pipe wall of the second communication air pipe (603).

10. The passive ankle exerciser for preventing deep vein thrombosis of lower limbs according to claim 9, wherein: An auxiliary pressing air cushion (602) is fixedly installed on the inner wall of the foot sleeve (406). The end of the auxiliary pressing air cushion (602) is fixedly communicated with a second electromagnetic discharge valve pipe (605). The auxiliary pressing air cushion (602) is embedded between the inner side wall and the ultrasonic probe (703).

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