Adjustable auxiliary training support for joint motion range of bedridden patient in neurology department

Abstract

The invention discloses an adjustable auxiliary training support for the joint motion range of a bedridden patient in the neurology department, and relates to the technical field of medical instruments.The auxiliary training support comprises a bed body, a limiting plate is fixedly installed on the inner wall of the bed body, an upper bed plate and a lower bed plate are arranged in the position, corresponding to the limiting plate, of the bed body, and the upper bed plate and the lower bed plate are rotationally connected with each other; the rotating mechanism and the moving mechanism control the thigh support and the shank support respectively, automatic and precise control over joint movement training of the patient is achieved by flexibly adjusting the thigh support and the shank support, and medical staff do not need to manually move the limbs of the patient to simulate joint movement by means of own strength and experience. The angle and the position of the support are easily and accurately adjusted through the rotating mechanism and the moving mechanism, then the movement range and the movement frequency of joints are controlled, the work intensity of medical workers is relieved, the body burden of the medical workers is reduced, and occupational strain caused by long-time repeated operation is effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an adjustable joint mobility auxiliary training bracket for bedridden patients in neurology departments. Background Art

[0002] Neurology is a secondary discipline specializing in neurological diseases. It primarily treats cerebrovascular diseases (cerebral infarction, cerebral hemorrhage), migraines, brain inflammatory diseases (encephalitis, meningitis), myelitis, epilepsy, dementia, metabolic diseases, genetic predisposition diseases, trigeminal neuralgia, sciatica, peripheral neuropathy, and myasthenia gravis.

[0003] Existing technologies have the following problems: Traditional joint mobility training methods for bedridden neurology patients rely heavily on manual operations by medical staff. During the training process, medical staff need to rely on their own strength and experience to manually move the patient's limbs to simulate joint movement. This operation method not only greatly increases the workload and physical burden of medical staff, but long-term repetitive operations can easily cause occupational strain. Summary of the Invention

[0004] In order to solve the above technical problems, an adjustable joint mobility auxiliary training bracket for bedridden neurology patients is provided, which solves the problem that the traditional joint mobility training method for bedridden neurology patients heavily relies on manual operation of medical staff. During the training process, medical staff need to rely on their own strength and experience to manually move the patient's limbs to simulate joint movement. This operation method not only greatly increases the work intensity and physical burden of medical staff, but also long-term repetitive operation can easily cause occupational strain problems.

[0005] In order to achieve the above objects, the technical solution adopted by the present invention is:

[0006] An adjustable joint range of motion auxiliary training stand for bedridden neurology patients, comprising a bed body, a limit plate fixedly mounted on the inner wall of the bed body, an upper bed board and a lower bed board disposed inside the bed body corresponding to the limit plate, and the upper bed board and the lower bed board being rotatably connected to each other;

[0007] Among them, the lower bed board includes two thigh supports, two calf supports and a partition board. The thigh supports correspond to the calf supports one by one, and the thigh supports are rotatably connected to the calf supports. The two thigh supports are symmetrically distributed about the center line of the partition board. A rotating mechanism is fixedly installed on the side of the bed corresponding to the thigh supports, and a movable mechanism is fixedly installed on the side of the bed corresponding to the calf supports.

[0008] Preferably, two first connecting plates are fixedly installed on the bottom surface of the upper bed board, a support plate is provided between the two first connecting plates, the support plate is rotatably connected to the two first connecting plates, a slide plate is provided inside the bed body corresponding to the support plate, the slide plate is rotatably connected to the lower end of the support plate, and two first screw rods are rotatably installed on the inner wall of the bed body, and the two first screw rods are threadedly connected to the slide plate.

[0009] Preferably, the rotating mechanism includes a first main body, which is fixedly connected to the inside of the bed, a first movable groove is opened on the side of the first main body, a second screw rod is rotatably installed on the inner wall of the first movable groove, and a slider corresponding to the first movable groove is sleeved on the outer surface of the second screw rod, a hydraulic rod is fixedly installed on the upper surface of the slider, a fixed plate is fixedly installed on the upper end of the hydraulic rod, a connecting rod is rotatably installed on the side of the fixing plate close to the thigh support, and the connecting rod is fixedly connected to the thigh support.

[0010] Preferably, the movable mechanism includes a second main body, a second movable groove is opened inside the second main body, a third screw is rotatably installed on the inner wall of the second movable groove, a movable block is sleeved on the outer surface of the third screw, an electric push rod is fixedly installed on the upper surface of the movable block, an extension plate is fixedly installed on the upper end of the electric push rod, two winding shafts are rotatably installed inside the extension plate corresponding to the calf bracket, a steel cable is sleeved on the outer surface of the winding shaft, and the lower end of the steel cable is fixedly connected to the calf bracket.

[0011] Preferably, the upper bed board includes a bottom board, a left side board and a right side board, the left side board is rotatably connected to the right side board, the bottom board is located below the left side board and the right side board, and an insertion board is fixedly installed on the bottom surface of the left side board and the right side board, and an insertion groove is provided on the bottom board surface corresponding to the insertion board.

[0012] Preferably, the end face of the left side panel away from the lower bed board and the end face of the right side panel away from the lower bed board are both fixedly installed with extension rods, and an arc-shaped internal gear is fixedly installed on one end of the extension rod away from the lower bed board. A rotating gear is rotatably installed on the side of the bed body corresponding to the arc-shaped internal gear, and the rotating gear is meshed with the arc-shaped internal gear.

[0013] Preferably, two rollers are rotatably installed on the side of the bed corresponding to the first screw rod, the two rollers correspond to the two first screw rods one by one, and the rollers are fixedly connected to the corresponding first screw rods, and the outer surfaces of the two rollers are provided with synchronous belts.

[0014] Preferably, a fixing rod is provided below the calf support, and both ends of the fixing rod are fixedly connected to the limiting plate.

[0015] Preferably, a baffle is fixedly installed on one side of the thigh support close to the calf support, and the calf support corresponding to the baffle is provided with a corresponding storage groove.

[0016] Compared with the prior art, the advantages of the present invention are: the present invention is provided with a rotating mechanism and a movable mechanism, which respectively control the thigh support and the calf support, and realizes automated and precise control of the patient's joint movement training by flexibly adjusting the thigh support and the calf support. Medical staff no longer need to rely on their own strength and experience to manually move the patient's limbs to simulate joint movement. Instead, they can easily and accurately adjust the angle and position of the support through the rotating mechanism and the movable mechanism, thereby controlling the amplitude and frequency of joint movement, reducing the work intensity of medical staff, reducing their physical burden, and effectively avoiding occupational strain caused by long-term repetitive operations; at the same time, the equipment is easy to operate, and medical staff or patients' families can master the operation method after simple training, which is convenient for use in daily rehabilitation training, helps to improve the compliance and continuity of training, and thus better promotes the recovery of patients' joint function. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 A schematic diagram of the three-dimensional structure of the present invention from another perspective;

[0019] Figure 3 An exploded view of the present invention;

[0020] Figure 4 Schematic diagram of the internal structure of the present invention

[0021] Figure 5 Schematic diagram of the three-dimensional structure of the rotating mechanism of the present invention;

[0022] Figure 6 An exploded view of the movable mechanism of the present invention;

[0023] Figure 7 This is an exploded view of the upper bed board of the present invention;

[0024] Figure 8 for Figure 1 A partial enlarged view of B in the middle;

[0025] Figure 9 for Figure 1 A partial enlarged view of middle A;

[0026] Figure 10 This is an exploded view of the lower bed board in the present invention.

[0027] The numbers in the figure are: 1, bed body; 2, limit plate; 3, upper bed board; 4, lower bed board; 5, thigh support; 6, calf support; 7, partition board;

[0028] 8. Rotation mechanism; 801. First body; 802. First movable groove; 803. Second screw rod; 804. Slider; 805. Hydraulic rod; 806. Fixed plate; 807. Connecting rod;

[0029] 9. Movable mechanism; 901. Second main body; 902. Second movable slot; 903. Third screw rod; 904. Moving block; 905. Electric push rod; 906. Extension plate; 907. Reel; 908. Steel cable;

[0030] 10. Support plate; 11. Slide plate; 12. First screw rod; 13. Bottom plate; 14. Left side plate; 15. Right side plate; 16. Insert plate; 17. Insert slot; 18. Extension rod; 19. Arc-shaped internal gear; 20. Rotating gear; 21. Roller; 22. Synchronous belt; 23. Fixed rod; 24. Baffle; 25. Storage slot. DETAILED DESCRIPTION

[0031] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0032] Reference Figures 1-10 As shown, an adjustable joint range of motion auxiliary training stand for bedridden patients in neurology department includes a bed body 1, characterized in that: a limit plate 2 is fixedly installed on the inner wall of the bed body 1, and an upper bed board 3 and a lower bed board 4 are provided inside the bed body 1 corresponding to the limit plate 2, and the upper bed board 3 and the lower bed board 4 are rotatably connected to each other;

[0033] Among them, the lower bed board 4 includes two thigh supports 5, two calf supports 6 and a partition board 7. The thigh supports 5 correspond to the calf supports 6 one by one, and the thigh supports 5 are rotatably connected to the calf supports 6. The two thigh supports 5 are symmetrically distributed about the center line of the partition board 7. The side of the bed body 1 corresponding to the thigh supports 5 is fixedly installed with a rotating mechanism 8, and the side of the bed body 1 corresponding to the calf supports 6 is fixedly installed with a movable mechanism 9. Both the thigh supports 5 and the calf supports 6 are provided with straps. Bedridden patients in the neurology department lie on the upper bed board 3 and the lower bed board 4. When the equipment performs auxiliary training on the patient's joint mobility, the staff uses the straps to fix the corresponding parts of the patient. Then, the calf support 6 and the thigh support 5 are driven to rotate accordingly through the movable mechanism 9 and the rotating mechanism 8, and the movement of the patient's legs is adjusted through the movable mechanism 9 and the rotating mechanism 8. When the patient's legs need to be kept in a vertical state, the movable mechanism 9 drives the calf support 6 upward, and at the same time, the rotating mechanism 8 assists the thigh support 5 to rotate, so that the edge lines of the calf support 6 and the thigh support 5 always remain in a collinear state. When the patient's thigh and calf need to bend, the rotating mechanism 8 rotates to rotate the thigh support 5, and at the same time, the movable mechanism 9 drives the calf support 6, so that the calf support 6 remains horizontal, thereby assisting the patient's thigh and calf to bend.

[0034] like Figure 3-Figure 4 As shown, two first connecting plates are fixedly installed on the bottom surface of the upper bed board 3, and a support plate 10 is arranged between the two first connecting plates. The support plate 10 is rotatably connected to the two first connecting plates. A slide plate 11 is arranged inside the bed body 1 corresponding to the support plate 10, and the slide plate 11 is rotatably connected to the lower end of the support plate 10. Two first screw rods 12 are rotatably installed on the inner wall of the bed body 1, and the two first screw rods 12 are threadedly connected to the slide plate 11. The first screw rod 12 rotates to make the slide plate 11 move along the axial direction of the first screw rod 12. The two first screw rods 12 limit the moving direction of the slide plate 11. The slide plate 11 pushes the support plate 10 to rotate, and the support plate 10 pushes the upper bed board 3 to rotate as a whole, so that the patient changes from lying to sitting.

[0035] like Figure 5As shown, the rotating mechanism 8 includes a first main body 801, which is fixedly connected to the interior of the bed body 1. A first movable groove 802 is opened on the side of the first main body 801, and a second screw rod 803 is rotatably installed on the inner wall of the first movable groove 802. The outer surface of the second screw rod 803 is sleeved with a slider 804 corresponding to the first movable groove 802. A hydraulic rod 805 is fixedly installed on the upper surface of the slider 804, and a fixed plate 806 is fixedly installed on the upper end of the hydraulic rod 805. A connecting rod 807 is rotatably installed on the side of the fixing plate 806 close to the thigh support 5. The connecting rod 807 is fixedly connected to the thigh support 5. The second screw rod 803 is externally connected to a servo motor. The second screw rod 803 rotates to make the slider 804 move along the axial direction of the second screw rod 803. The second screw rod 803 cooperates with the hydraulic rod 805 to make the connecting rod 807 move into an arc, thereby realizing the rotation of the thigh support 5 around one end close to the upper bed board 3, which is convenient for the patient's thigh to rotate.

[0036] like Figure 6 As shown, the movable mechanism 9 includes a second main body 901, a second moving groove 902 is opened inside the second main body 901, a third screw rod 903 is rotatably installed on the inner wall of the second moving groove 902, and a moving block 904 is sleeved on the outer surface of the third screw rod 903, and an electric push rod 905 is fixedly installed on the upper surface of the moving block 904, and an extension plate 906 is fixedly installed on the upper end of the electric push rod 905. Two winding shafts 907 are rotatably installed inside the extension plate 906 corresponding to the calf support 6, and a steel cable 908 is sleeved on the outer surface of the winding shaft 907. The lower end of the steel cable 908 is fixedly connected to the calf support 6. The third screw rod 903 and the winding shaft 907 are both externally connected to a servo motor. When the patient's legs need to be kept in a vertical state for movement, the winding shaft 907 is first wound up. The calf support 6 rotates, and the third screw rod 903 rotates slowly during the winding process of the winding shaft 907, causing the moving block 904 to move slowly. When the steel cable 908 is completely wound, the electric push rod 905 unfolds, and the rotation speed of the third screw rod 903 increases. The two cooperate with each other to make the calf support 6 rotate around the thigh support 5 around the end close to the upper bed board 3. When the patient's thigh and calf need to bend, when the thigh support 5 rotates, the steel cable 908 contracts quickly and the rotation speed of the third screw rod 903 is consistent with the rotation speed of the second screw rod 803. At the same time, the electric push rod 905 unfolds. The unfolding height of the electric push rod 905 is the same as the vertical distance between the end of the thigh support 5 away from the upper bed board 3 and the bed board, thereby keeping the calf support 6 always in a horizontal state.

[0037] like Figure 7As shown, the upper bed board 3 includes a bottom board 13, a left side board 14 and a right side board 15. The left side board 14 is rotatably connected to the right side board 15. The bottom board 13 is located below the left side board 14 and the right side board 15. An insert plate 16 is fixedly installed on the bottom surface of the left side board 14 and the right side board 15. An insert groove 17 is provided on the surface of the bottom board 13 corresponding to the insert plate 16. When the patient needs to turn over, if the patient turns to the left, the right side board 15 rotates around the right side board 15 close to the left side board 14. If the patient turns to the right, the left side board 14 rotates around the left side board 14 close to the right side board 15. An interference fit is adopted between the insert plate 16 and the insert groove 17, and the fit tolerance is 0.5mm-1mm. The left side board 14 and the right side board 15 are connected to the bottom board 13 through the insert plate 16, so that the bottom board 13, the left side board 14 and the right side board 15 form a whole.

[0038] like Figure 8 As shown, the end face of the left side plate 14 away from the lower bed board 4 and the end face of the right side plate 15 away from the lower bed board 4 are both fixedly installed with an extension rod 18, and an arc-shaped internal gear 19 is fixedly installed on the end of the extension rod 18 away from the lower bed board 4. A rotating gear 20 is rotatably installed on the side of the bed body 1 corresponding to the arc-shaped internal gear 19. The rotating gear 20 is meshed and connected with the arc-shaped internal gear 19. The rotating gear 20 is externally connected to a servo, and an angle sensor and a mechanical limit are provided inside the servo. The rotating gear 20 is rotated by the servo to a certain angle, and the rotating gear 20 pushes the corresponding plate through the arc-shaped internal gear 19 and the extension rod 18. If the left side plate 14 needs to be rotated, the left rotating gear 20 rotates, and if the right side plate 15 needs to be rotated, the right rotating gear 20 rotates.

[0039] like Figure 9 As shown, two rollers 21 are rotatably installed on the side of the bed body 1 corresponding to the first screw rod 12. The two rollers 21 correspond one-to-one to the two first screw rods 12, and the rollers 21 are fixedly connected to the corresponding first screw rods 12. The outer surfaces of the two rollers 21 are sleeved with a synchronous belt 22. One of the first screw rods 12 is externally connected to a servo motor, and the servo motor drives the corresponding first screw rod 12 to rotate. The first screw rod 12 drives the corresponding roller 21 to rotate, and the roller 21 drives the other roller 21 to rotate through the synchronous belt 22. The two first screw rods 12 have the same rotation direction, and the two first screw rods 12 are rotated in the same direction through the rollers 21 and the synchronous belt 22, thereby ensuring the moving direction and smoothness of the skateboard 11.

[0040] like Figure 3 As shown, a fixing rod 23 is provided below the calf support 6, and both ends of the fixing rod 23 are fixedly connected to the limiting plate 2. When the patient's joints do not need to move, the fixing rod 23 limits the two calf supports 6 and the partition plate 7, so that the thigh support 5, the calf support 6, the left plate 14 and the right plate 15 maintain a plane.

[0041] like Figure 10As shown, a baffle 24 is fixedly installed on the side of the thigh support 5 close to the calf support 6, and the calf support 6 corresponding to the baffle 24 is provided with a corresponding storage groove 25. The thigh support 5 limits the calf support 6 through the baffle 24. When the patient needs to lie flat, the baffle 24 ensures that the thigh support 5 and the calf support 6 remain in a horizontal state.

[0042] Working principle: The staff uses the strap to fix the corresponding part of the patient, and then drives the calf support 6 and the thigh support 5 to rotate accordingly through the movable mechanism 9 and the rotating mechanism 8, and adjusts the movement of the patient's legs through the movable mechanism 9 and the rotating mechanism 8. When the patient's legs need to keep vertical and move, the reel 907 is reeled in first, so that the calf support 6 rotates. During the reeling process of the reel 907, the third screw rod 903 rotates slowly, so that the moving block 904 moves slowly. When the steel cable 908 is completely reeled in, the electric push rod 905 unfolds, and at the same time, the speed of the third screw rod 903 increases. The two cooperate with each other to make the calf support 6 rotate around the thigh support 5 around the end close to the upper bed board 3. At the same time, the rotating mechanism 8 assists the thigh support 5 to rotate, so that the edge lines of the calf support 6 and the thigh support 5 always remain in a collinear state, and the coordinated control of the thigh and calf enhances the balance and hip joint stability; when the patient's thigh and calf need to bend, the second screw rod 803 rotates to make the slider 804 move along the second screw rod 803 When the thigh support 5 is rotated, the steel cable 908 contracts rapidly while the third screw rod 903 rotates at the same speed as the second screw rod 803. At the same time, the electric push rod 905 is unfolded. The unfolding height of the electric push rod 905 is the same as the vertical distance between the end of the thigh support 5 away from the upper bed board 3 and the bed board, thereby keeping the calf support 6 always in a horizontal state. The rotating mechanism 8 and the movable mechanism 9 on both sides of the bed body 1 operate separately to realize the synchronous contraction of the front of the thigh and the back of the calf, simulating the daily stair climbing action; the rotating mechanism 8 and the movable mechanism 9 strengthen the coordinated force between muscles and reduce energy loss by simulating special sports movements; when the patient needs to turn over, the rotating gear 20 in the opposite direction of the turning direction rotates, and the rotating gear 20 pushes the corresponding side plate through the arc-shaped internal gear 19 and the extension rod 18 to assist medical staff in turning the patient over.

[0043] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable support for assisting the training of joint range of motion for bedridden patients in neurology department, comprising a bed body (1), characterized in that: A limit plate (2) is fixedly mounted on the inner wall of the bed body (1); an upper bed board (3) and a lower bed board (4) are arranged inside the bed body (1) corresponding to the limit plate (2), and the upper bed board (3) and the lower bed board (4) are rotatably connected to each other; The lower bed board (4) includes two thigh supports (5), two calf supports (6) and a partition board (7), wherein the thigh supports (5) correspond to the calf supports (6) one by one, and the thigh supports (5) and the calf supports (6) are rotatably connected, and the two thigh supports (5) are symmetrically distributed about the center line of the partition board (7), and a rotating mechanism (8) is fixedly installed on the side of the bed body (1) corresponding to the thigh supports (5), and a movable mechanism (9) is fixedly installed on the side of the bed body (1) corresponding to the calf supports (6).

2. The adjustable joint range of motion auxiliary training stand for bedridden neurology patients according to claim 1, characterized in that: Two first connecting plates are fixedly installed on the bottom surface of the upper bed board (3), a support plate (10) is arranged between the two first connecting plates, the support plate (10) is rotatably connected to the two first connecting plates, a slide plate (11) is arranged inside the bed body (1) corresponding to the support plate (10), the slide plate (11) is rotatably connected to the lower end of the support plate (10), and two first screw rods (12) are rotatably installed on the inner wall of the bed body (1), and the two first screw rods (12) are both threadedly connected to the slide plate (11).

3. The adjustable joint range of motion auxiliary training stand for bedridden neurology patients according to claim 1, characterized in that: The rotating mechanism (8) includes a first main body (801), the first main body (801) is fixedly connected to the inside of the bed body (1), a first movable groove (802) is provided on the side of the first main body (801), a second screw rod (803) is rotatably installed on the inner wall of the first movable groove (802), a slider (804) corresponding to the first movable groove (802) is sleeved on the outer surface of the second screw rod (803), a hydraulic rod (805) is fixedly installed on the upper surface of the slider (804), a fixed plate (806) is fixedly installed on the upper end of the hydraulic rod (805), a connecting rod (807) is rotatably installed on the side of the fixing plate (806) close to the thigh support (5), and the connecting rod (807) is fixedly connected to the thigh support (5).

4. The adjustable joint range of motion auxiliary training stand for bedridden neurology patients according to claim 1, characterized in that: The movable mechanism (9) includes a second main body (901), a second movable groove (902) is provided inside the second main body (901), a third screw rod (903) is rotatably installed on the inner wall of the second movable groove (902), a movable block (904) is sleeved on the outer surface of the third screw rod (903), an electric push rod (905) is fixedly installed on the upper surface of the movable block (904), an extension plate (906) is fixedly installed on the upper end of the electric push rod (905), two reeling shafts (907) are rotatably installed inside the extension plate (906) corresponding to the calf bracket (6), a steel cable (908) is sleeved on the outer surface of the reeling shaft (907), and the lower end of the steel cable (908) is fixedly connected to the calf bracket (6).

5. The adjustable joint range of motion auxiliary training stand for bedridden neurology patients according to claim 1, characterized in that: The upper bed board (3) includes a bottom board (13), a left side board (14) and a right side board (15); the left side board (14) is rotatably connected to the right side board (15); the bottom board (13) is located below the left side board (14) and the right side board (15); an insertion board (16) is fixedly installed on the bottom surface of the left side board (14) and the right side board (15); and an insertion groove (17) is provided on the surface of the bottom board (13) corresponding to the insertion board (16).

6. The adjustable joint range of motion auxiliary training stand for bedridden neurology patients according to claim 5, characterized in that: An extension rod (18) is fixedly mounted on the end face of the left side plate (14) away from the lower bed board (4) and the end face of the right side plate (15) away from the lower bed board (4); an arc-shaped internal gear (19) is fixedly mounted on one end of the extension rod (18) away from the lower bed board (4); a rotating gear (20) is rotatably mounted on the side of the bed body (1) corresponding to the arc-shaped internal gear (19); and the rotating gear (20) is meshedly connected with the arc-shaped internal gear (19).

7. The adjustable joint range of motion auxiliary training stand for bedridden neurology patients according to claim 2, characterized in that: Two rollers (21) are rotatably mounted on the side of the bed body (1) corresponding to the first screw rod (12), the two rollers (21) correspond to the two first screw rods (12) one by one, and the rollers (21) are fixedly connected to the corresponding first screw rods (12), and the outer surfaces of the two rollers (21) are sleeved with a synchronous belt (22).

8. The adjustable joint range of motion auxiliary training stand for bedridden neurology patients according to claim 1, characterized in that: A fixing rod (23) is provided below the calf support (6), and both ends of the fixing rod (23) are fixedly connected to the limiting plate (2).

9. The adjustable joint range of motion auxiliary training stand for bedridden neurology patients according to claim 1, characterized in that: A baffle (24) is fixedly installed on one side of the thigh support (5) close to the calf support (6), and the calf support (6) corresponding to the baffle (24) is provided with a corresponding receiving groove (25).

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