An adjustable fixing bracket for knee joint orthopedic rehabilitation

Abstract

The present invention relates to the field of orthopedic rehabilitation braces, and specifically to an adjustable fixed brace for orthopedic rehabilitation of the knee joint; by arranging a thigh brace, a calf brace, a strap and a protective lining, fixation of the leg bones and the device is achieved; by connecting the calf brace with a connecting rod, relative fixation of the connecting rod and the calf brace is achieved; by connecting the connecting rod, a first arc-shaped turntable, a second arc-shaped turntable, the calf brace, a pedal and a bottom plate, the foot is fixed; by a first sliding column, a second sliding column, a first slider, a first spring, a second spring, a limit plate and an adjustment plate, the foot brace is rotated; on the one hand, it is convenient for patients to walk simply after surgery; on the other hand, it is convenient for patients to gradually release the fixation of the foot during later rehabilitation training, so as to avoid secondary injury to the leg bones caused by excessive activity of the patient.

Description

Technical Field

[0001] The invention relates to the field of orthopedic rehabilitation brackets, in particular to an adjustable fixing bracket for knee joint orthopedic rehabilitation. Background Art

[0002] After patients undergo orthopedic knee surgery, they usually need to wear an adjustable fixed brace for knee orthopedic rehabilitation. This is to stabilize the knee joint after the surgery and prevent the unstable factors in the patient's daily life from causing the knee joint to be injured again or even dislocated. The adjustable fixed brace for knee orthopedic rehabilitation currently used on the market mostly uses straps to tie the fixed brace to both sides of the bone to prevent bone dislocation or rotation.

[0003] However, the functionality of this type of adjustable fixation brace for knee orthopedic rehabilitation is relatively simple. For some patients with severe bone damage after surgery, the rotation of the feet will pull the calf, causing pain. In daily life, it is also necessary to always pay attention to the feet not touching hard objects to prevent the feet from colliding and pulling the leg bones, thereby causing secondary injuries. In the patient's postoperative life, a walker is often needed to help walk, which is more troublesome. In the later stage of the patient's recovery, because the legs have been fixed for several months, they are usually stiff and difficult to turn. At this time, rehabilitation training is needed to restore leg strength. In this process, the recovery of leg strength must be gradual. Excessive activity may even cause secondary injuries to bones and ligaments. The traditional adjustable fixation brace for knee orthopedic rehabilitation lacks restrictions on the rotation of the patient's feet, so it is difficult to effectively protect the leg bones and ligaments during this period.

[0004] Based on the above defects, the present invention provides an adjustable fixation bracket for knee joint orthopedic rehabilitation, which can further protect the bones and ligaments below the legs of patients with severe bone damage during surgery and rehabilitation training, and help patients walk. According to the recovery situation, the restrictions on the leg bones and ligaments are gradually released to prevent secondary injury. Summary of the invention

[0005] In order to make up for the shortcomings of the prior art and solve the problem that patients with severe bone damage in the prior art are prone to secondary injuries to the bones and joints below the legs during surgery and rehabilitation training; the present invention proposes an adjustable fixing bracket for knee joint orthopedic rehabilitation.

[0006] The technical solution adopted by the present invention to solve the technical problem is: an adjustable fixed support for knee joint orthopedic rehabilitation, comprising symmetrically distributed thigh supports, a calf support rotatably connected to the lower end of the thigh support, a protective lining fixed to the thigh support and the calf support, and a strap fixed to the protective lining, and also comprising;

[0007] The foot support and the lower end of the thigh support are also rotatably connected with a connecting rod, the connecting rod is fixedly connected and parallel to the calf support, and the lower end of the connecting rod is fixedly connected to the foot support.

[0008] The pedal is rotatably connected to the lower end of the foot bracket symmetrically distributed, and the first sliding column is slidably connected to the lower part of the foot bracket up and down, and the lower end of the first sliding column is rotatably connected to the first sliding block, the first sliding block is slidably connected to the bottom plate, and the bottom plate is parallel to the pedal, the lower end of the first sliding column is threadedly connected to the limiting plate, and the outer sleeve of the first sliding column is provided with a first spring fixedly connected to the lower end of the foot bracket, the lower end of the first spring is located on the upper surface of the limiting plate and slidably connected to it, the upper surface of the bottom plate has symmetrically distributed sliding grooves, the first sliding block slides in the sliding grooves, the upper surface of the bottom plate is threadedly connected to the second sliding column distributed in an array, the outer thread of the second sliding column is connected to the adjusting plate, and the adjusting plate is fixedly connected with a second spring sleeved on the second sliding column, and the second sliding column slides up and down in the pedal.

[0009] Preferably, a first arc-shaped turntable is fixedly connected between the symmetrically distributed connecting rods and the symmetrically distributed foot brackets, one end of the first arc-shaped turntable is rotatably connected to the second arc-shaped turntable, and the other end is fixedly connected to the second arc-shaped turntable by bolts, and there are smoothly connected arc-shaped slide grooves in the first arc-shaped turntable and the second arc-shaped turntable, and an arc-shaped slider is slidably connected in the arc-shaped slide groove, and the arc-shaped slider is fixedly connected to the foot bracket, and there is a groove on the upper surface of the arc-shaped slider, and a screw is spirally driven on the side of the groove.

[0010] Preferably, an anti-sliding block is fixedly connected to the upper surface of the pedal, and the anti-sliding block has an arc surface that fits with the middle recessed portion of the sole of a person's foot.

[0011] Preferably, a fastening rod is threadedly connected below the anti-sliding block, a straight groove is provided in the pedal, the anti-sliding block slides along the straight groove, and the other end of the fastening rod extends to the outside of the space between the pedal and the base plate.

[0012] Preferably, the foot support is a telescopic structure that can slide up and down to adjust the height.

[0013] Preferably, there is an arc groove at the upper end of the connecting rod, and there are evenly distributed threaded holes at the lower end of the thigh support. The vertical projection of the threaded holes on the connecting rod is located in the arc groove, and the center of the arc groove falls on the rotation axis of the connecting rod and the thigh support. The threaded hole is threadedly connected to a limit screw that passes through the arc groove.

[0014] Preferably, the upper end of the connecting rod is slidably connected to a force applying rod, and the force applying rod slides up and down along the connecting rod.

[0015] Preferably, there is a groove at the upper end of the connecting rod, and a baffle, a second slider and a friction block are arranged in the groove from the outside to the center in sequence. The baffle is fixedly connected to the outside of the groove, and there is a threaded hole of the same specification as that on the thigh support. The second slider slides in the groove, and a friction block is fixedly connected to the side of the second slider away from the baffle, and the side of the friction block opposite to the thigh support is rough.

[0016] Preferably, the height between the upper surface of the pedal and the bottom surface of the base plate does not exceed six centimeters.

[0017] Preferably, the friction block is made of elastic material, such as spring, rubber, foam and plastic.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The adjustable fixed bracket for knee joint orthopedic rehabilitation described in the present invention realizes the fixation of leg bones and the fixation of the device by arranging a thigh bracket, a calf bracket, a strap and a protective lining, and realizes the relative fixation of the connecting rod and the calf bracket by fixing the connecting rod and the calf bracket, and realizes the fixation of the foot by the connecting rod, the first arc-shaped turntable, the second arc-shaped turntable, the calf bracket, the pedal and the bottom plate, and realizes the rotation of the foot bracket by the first sliding column, the second sliding column, the first slider, the first spring, the second spring, the limit plate and the adjustment plate. On the one hand, it is convenient for the patient to walk simply after the operation, and on the other hand, it is convenient for the patient to gradually release the fixation of the foot during the later rehabilitation training, so as to avoid the patient's excessive activity pulling the leg bones and causing secondary injury.

[0020] 2. The adjustable fixed bracket for knee joint orthopedic rehabilitation described in the present invention, by setting a baffle, a second slider, a friction block and a limit screw 14, on the one hand, by adjusting the limit screw in different threaded holes at the lower end of the thigh bracket, the rotation angle between the calf and the thigh is controlled, and the rotation restriction of the calf is gradually released, so that the patient can avoid secondary injury caused by excessive rotation angle while performing rehabilitation training; on the other hand, when the patient performs load training in the later stage of recovery to enhance leg strength, the limit screw and the baffle are spirally transmitted, and the limit screw is rotated to push the friction block on the second slider, and the friction force of the friction block on the surface of the thigh bracket is increased to increase the resistance of the calf bracket during rotation, thereby increasing the force on the calf during rotation of the calf and achieving the purpose of load training.

[0021] 3. The adjustable fixed bracket for knee joint orthopedic rehabilitation described in the present invention is provided with an upper bracket, a lower bracket, an anti-sliding block, a fastening block and a fastening rod. On the one hand, the height of the foot bracket can be adjusted by sliding the upper bracket and the lower bracket to match patients with different leg lengths. On the other hand, the stability of the patient during use is improved through the movement of the anti-sliding block and the anti-slip function of the anti-sliding block, and the bracket can adapt to patients with different sizes of feet, further improving the practicality and safety of the bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1 is a stereogram of the present invention;

[0024] Figure 2 yes Figure 1 Partial structural view;

[0025] Figure 3 yes Figure 1 A magnified view of the structure at center;

[0026] Figure 4 yes Figure 3 A cross-sectional view of

[0027] Figure 5 This is a structural view at the first arc turntable;

[0028] Figure 6 It is a bottom view of the structure of the lower surface of the pedal;

[0029] Figure 7 Schematic diagram of the structure of the first sliding column and the first sliding block.

[0030] In the figure: 1. thigh support; 11. calf support; 12. protective lining; 13. strap; 14. limit screw; 2. foot support; 21. first slide column; 22. first slider; 23. limit plate; 24. first spring; 25. second slide column; 26. adjustment plate; 27. second spring; 28. upper support; 29. ​​lower support; 281. pin; 3. connecting rod; 31. baffle; 32. second slider; 33. friction block; 4. pedal; 41. anti-sliding block; 42. fastening rod; 5. bottom plate; 6. first arc turntable; 61. second arc turntable; 62. arc slider; 63. screw; 7. force rod. DETAILED DESCRIPTION

[0031] In order to make the technical solution implemented by the present invention easier to understand, it is further elaborated below in conjunction with specific implementation methods.

[0032] like Figures 1 to 7 As shown;

[0033] Embodiment 1;

[0034] An adjustable fixed support for knee joint orthopedic rehabilitation, comprising a symmetrically distributed thigh support 1, a calf support 11 rotatably connected to the lower end of the thigh support 1, a protective lining 12 fixedly connected to the thigh support 1 and the calf support 11, and a binding 13 fixedly connected to the protective lining 12, and further comprising;

[0035] The foot support 2 and the lower end of the thigh support 1 are also rotatably connected to a connecting rod 3, the connecting rod 3 is fixedly connected and parallel to the calf support 11, and the lower end of the connecting rod 3 is fixedly connected to the foot support 2.

[0036] The pedal 4 is rotatably connected to the lower end of the symmetrically distributed foot bracket 2, and the first slide column 21 is slidably connected to the lower end of the foot bracket 2, and the first slider 22 is rotatably connected to the lower end of the first slide column 21. The first slider 22 is slidably connected to the bottom plate 5, and the bottom plate 5 is parallel to the pedal 4. The lower end of the first slide column 21 is threadedly connected to the limiting plate 23, and the first slide column 21 is covered with a first spring 24 fixedly connected to the lower end of the foot bracket 2. The lower end of the first spring 24 is located on the upper surface of the limiting plate 23 and is slidably connected to it. The upper surface of the bottom plate 5 has symmetrically distributed sliding grooves, and the first slider 22 slides in the sliding grooves. The upper surface of the bottom plate 5 is threadedly connected to the second slide column 25 distributed in an array, and the second slide column 25 is externally threadedly connected to the adjusting plate 26. The adjusting plate 26 is fixedly connected with a second spring 27 sleeved on the outside of the second slide column 25, and the second slide column 25 slides up and down in the pedal 4.

[0037] When in use, by setting a thigh support 1, a calf support 11 rotatably connected to the lower end of the thigh support 1, a liner 12 fixed to the thigh support 1 and the calf support 11, and a strap 13 fixed to the liner 12, the thigh and calf after knee correction are fixed, so that the knee joint is located at the rotatable connection between the thigh support 1 and the thigh support 1, and the sole of the foot is in contact with the pedal 4. When the patient moves, the pressure on the thigh is transmitted to the foot support 2 through the thigh support 1 and the connecting rod 3. The pressure of the foot support 2 will compress the first spring 24, and the first sliding column 21 will slide upward in the foot support 2. Since the first sliding block 22 rotatably connected to the lower end of the foot support 2 slides in the sliding groove of the bottom plate 5, the bottom plate 5 is driven to move upward, and the limiting plate 23 is rotated so that its bottom surface is aligned with the bottom plate 5 is in surface contact. Since the limiting plate 23 is threadedly connected to the first sliding column 21, the two are in a vertical relationship. Since the first sliding column 21 slides in the foot support 2, the bottom plate 5 is in a vertical relationship with the first sliding column 21. Therefore, the pedal 4 parallel to the bottom plate 5 is in a vertical relationship with the foot support 2, so that the foot and the leg are in a relatively fixed state, thereby effectively preventing the patient from pulling the leg bone directly connected to the foot bone due to the rotation of the foot, causing secondary injury. With the compression of the first spring 24, the elastic force of the first spring 24 will eventually balance the pressure of the thigh to achieve stability. In this process, the adjusting plate 26 is located at the bottom of the second sliding column 25, and the second spring 27 will not contact the pedal 4 due to its own length limitation, so that the foot All the pressure of the lower bracket 2 will be transmitted to the bottom plate 5, so that the pedal 4 is not stressed, thereby reducing the probability of secondary injury to the patient's knee and the area below the knee during daily activities. When the patient recovers to the extent that he can perform simple rehabilitation training, he first rotates the limit plate 23 to move upward to create a gap between the limit plate 23 and the bottom plate 5. When the pedal 4 rotates, it drives the bottom plate 5 parallel to it to rotate together. Since there is a gap between the limit plate 23 and the bottom plate 5, the bottom plate 5 and the limit plate 23 can be tilted, and the larger the gap between the two, the larger the angle at which the bottom plate 5 and the pedal 4 can rotate, thereby controlling the amplitude of the patient's foot rotating up and down, allowing the patient to gradually adapt to rotations of different angles and sizes, and avoiding excessive rotation of the foot at one time to pull the leg The second spring 27 is in contact with the bottom surface of the pedal 4, so that the force balanced with the thigh pressure is the combined force of the second spring 27 and the first spring 24. The elastic force of the second spring 27 depends on its compression. Therefore, when the position of the adjusting plate 26 is higher and the compression is greater, the elastic force of the second spring 27 is greater. Because the force is mutual, the pressure of the sole of the foot on the pedal 4 is the elastic force of the second spring 27. Therefore, by controlling the height of the adjusting plate 26, the size of the supporting force on the sole of the foot 5 can be controlled, so as to realize the rehabilitation training of the load change of the foot, help gradually restore the function of the foot, and reduce the influence on the knee joint during the rehabilitation process. In summary,The device can further protect the bones and ligaments below the legs of patients with severe bone damage during surgery and rehabilitation training, and help patients walk. According to the recovery situation, the restrictions on the bones and ligaments of the legs can be gradually released to prevent secondary injuries.

[0038] A first arc-shaped turntable 6 is fixedly connected between the symmetrically distributed connecting rods 3 and the symmetrically distributed foot brackets 2. One end of the first arc-shaped turntable 6 is rotatably connected to the second arc-shaped turntable 61, and the other end is fixedly connected to the other end of the second arc-shaped turntable 61 by bolts. There are smoothly connected arc-shaped sliding grooves in the first arc-shaped turntable 6 and the second arc-shaped turntable 61, and an arc-shaped slider 62 is slidably connected in the arc-shaped sliding groove. The arc-shaped slider 62 is fixedly connected to the foot bracket 2, and a groove is provided on the upper surface of the arc-shaped slider 62, and a screw 63 is spirally driven on the side of the groove.

[0039] When in use, by providing the first arc rotating disk 6, the second arc rotating disk 61, the arc chute smoothly connected in the first arc rotating disk 6 and the second arc rotating disk 61, and the arc sliding block 62 slidably connected in the arc chute and fixed to the foot support 2, when the patient's foot needs to rotate around the leg bone, the pedal 4 is driven to rotate by the rotation of the foot, the pedal 4 drives the foot support 2 to rotate, and the rotation of the foot support 2 drives the arc sliding block 62 fixed thereto to slide in the arc chute, thereby realizing the rotation of the foot, by making one end of the first arc rotating disk 6 and the second arc rotating disk 61 rotatably connected and the other end fixedly connected by bolts, when the patient needs to put his leg into the center of the arc of the first arc rotating disk 6 and the second arc rotating disk 61, the first arc rotating disk 6 and one end of the second arc rotating disk 61 are connected by the rotation connection Then, unscrew the bolts, open the gap and put the leg in, and then use bolts to fix the first arc rotating disk 6 and the second arc rotating disk 61, so that it is convenient for the patient to carry out rehabilitation training in the later stage. By setting a groove at the upper end of the arc sliding block 62 and a screw 63 in the groove, the screw 63 is rotated to rotate its end until it contacts and squeezes and rubs against the inner wall of the arc sliding groove in the first arc rotating disk 6 and the second arc rotating disk 61, so that the end of the screw 63 generates friction with the inner side of the arc sliding groove, so that the screw 63 cannot slide in the arc sliding groove under the drive of the arc sliding block 62, so that the arc sliding block 62 threadedly connected to it cannot slide, thereby controlling the sliding of the arc sliding block 62, and further controlling whether the patient's foot is suitable for rotation, preventing the patient from being strained due to foot rotation before the leg bones and ligaments grow well.

[0040] An anti-sliding block 41 is fixedly connected to the upper surface of the pedal 4. The upper surface of the anti-sliding block 41 has an arc surface that fits the middle concave part of the sole of a person.

[0041] When in use, the anti-sliding block 41 is fixedly connected to the upper surface of the pedal 4, and the curved surface on the anti-sliding block 41 fits with the middle depression of the sole of the person's foot, thereby increasing the friction between the patient's sole and the pedal 4, and reducing the probability of relative sliding between the sole of the foot and the pedal 4 during the process of pressing the pedal 4 down. Because in the process of the patient walking back and forth, the patient's thigh will not only generate pressure on the bottom plate 5 during the process of moving back and forth, but also generate a component force of moving back and forth. Therefore, the direction in which the patient's foot and the surface of the pedal 4 can slide relative to each other can only be forward and backward. Since the curved surface fits with the middle depression of the sole of the person's foot, the sole of the foot will be restricted by the curved surface. When the sole of the foot and the curved surface slide, it can only slide along the curved surface. When the sole of the foot and the curved surface fit, the contact area is larger than when there is no curved surface, so the friction between the two is also greater. Moreover, the curved surface itself will also generate a horizontal resistance to the sole of the foot when the sole of the foot slides back and forth, further preventing the sole of the foot from sliding, thereby preventing the patient from pulling the leg bone due to the sliding of the sole of the foot during the process of pressing the pedal 4 down, and further reducing the probability of the patient's knee being injured secondary.

[0042] A limiting screw 14 is provided, an arc groove is provided at the upper end of the connecting rod 3, and evenly distributed threaded holes are provided at the lower end of the thigh support 1. The vertical projection of the threaded holes on the connecting rod 3 is located in the arc groove, and the center of the arc groove falls on the rotation axis of the connecting rod 3 and the thigh support 1. The threaded hole is threadedly connected with a limiting screw 14 that passes through the arc groove.

[0043] By setting a limit screw 14, an arc groove at the upper end of the connecting rod 3 and a threaded hole at the corresponding position of the lower end of the thigh support 1, the limit screw 14 passes through the arc groove at the upper end of the connecting rod 3 and is finally fixed in the threaded hole at the lower end of the thigh support 1. When the thigh support 1 and the calf support 11 rotate relative to each other, the limit screw 14 fixed to the thigh support 1 slides relatively along the arc surface in the arc groove. When the limit screw 14 rotates to contact the non-arc surface in the arc groove, the rotation of the limit screw 14 is blocked by the non-arc surface of the arc groove on the connecting rod 3, so that the thigh support 1 and the connecting rod 3 cannot rotate relative to each other. Since the connecting rod 3 and the calf support 11 are fixedly connected, the thigh support 1 and the calf support 11 cannot continue to rotate relative to each other. Therefore, the distance that the thigh support 1 and the calf support 11 can rotate relative to each other is the distance between the limit screw 14 and the arc groove in the direction of rotation to be generated. The distance between the non-arc surface inside the thigh support 1 and the non-arc surface in the direction of rotation is controlled, that is, the limit screw 14 is threadedly connected to different threaded holes at the lower end of the thigh support 1, which can control the rotation angle between the thigh support 1 and the calf support 11. When the limit screw 14 is threadedly connected to the non-arc surface in the direction of rotation, the thigh support 1 and the calf support 11 are located on the same straight line. If the thigh support 1 and the calf support 11 are about to rotate, at the moment of rotation, the limit screw 14 is in direct contact with the non-arc surface of the arc groove on the calf support 11, thereby preventing the limit screw 14 from rotating. At this time, relative rotation cannot occur between the thigh support 1 and the calf support 11, that is, the two are relatively fixed, thereby protecting the thigh bone and the calf bone from relative rotation and causing secondary injury.

[0044] The upper end of the connecting rod 3 is slidably connected with a force applying rod 7 , and the force applying rod 7 slides up and down along the connecting rod 3 .

[0045] When in use, a force-applying rod 7 is connected by sliding up and down on the upper end of the connecting rod 3. The force-applying rod 7 is rotated to drive the connecting rod 3 fixed thereto to rotate relative to the thigh support 1, and the thigh support 1 drives the pedal 4 to rotate. Since the connecting rod 3 is fixed to the calf support 11, the calf support 11 also rotates with the rotation of the connecting rod 3, and finally drives the calf fixed to the calf support 11 and the foot fixed to the pedal 4 to rotate synchronously relative to the thigh. Since the calf has been fixed for a long time, the bones are stiff and the muscles are atrophied and weak, making it difficult to rotate. Therefore, with the help of the strength of the arm, the force-applying rod 7 is rotated to drive the rotation of the leg, which can make it more convenient for the patient to perform rehabilitation training. When the force-applying rod 7 is not in use, the force-applying rod 7 can be slid under the connecting rod 3 to prevent the patient from accidentally touching the force-applying rod 7 during the activity, causing the force-applying rod 7 to rotate, thereby driving the connecting rod 3 and the calf support 11 to rotate, and further driving the patient's calf to rotate, causing secondary injury to the patient's leg, and further protecting the patient's leg safety.

[0046] There is a groove at the upper end of the connecting rod 3, and a baffle 31, a second slider 32 and a friction block 33 are arranged in the groove from the outside to the center in sequence. The baffle 31 is fixedly connected to the outside of the groove, and there is a threaded hole on the baffle 31 with the same specifications as the lower end of the thigh support 1. The second slider 32 slides in the groove, and a friction block 33 is fixedly connected to the side of the second slider 32 away from the baffle 31, and the side of the friction block 33 opposite to the thigh support 1 is rough.

[0047] When in use, a groove is set at the upper end of the connecting rod 3, and a baffle 31, a second sliding column 25 and a rubber pad are set in the groove. There is a threaded hole of the same specification as that on the thigh support 1 on the baffle 31. Therefore, after the patient has completed the leg bending training, he needs to perform leg weight-bearing training next. At this time, the limit screw 14 is taken out and inserted into the threaded hole of the baffle 31. The limit screw 14 is rotated so that the end of the limit screw 14 inserted into the baffle 31 contacts the surface of the second slider 32. Since the second slider 32 is slidably connected in the groove at the upper end of the connecting rod 3, the entry of the limit screw 14 will push the second slider 32 to move in the direction of the thigh support 1. The friction block 33 is fixedly connected to the side of the second slider 32 away from the baffle 31. Therefore, as the second slider 32 slides, the friction block 33 will first contact the thigh support 1. Since the side of the friction block 33 opposite to the thigh support 1 is rough, friction between the friction block 33 and the thigh support 1 is generated, thereby increasing the resistance of the connecting rod 3 and the calf support 11 when rotating relative to the thigh support 1, thereby increasing the resistance of the calf during the rotation process. The calf needs additional force during the rotation process to overcome the friction resistance and rotate, thereby realizing weight-bearing rehabilitation training of the calf. There is no need to increase the load by hanging sandbags on the feet, which facilitates the recovery of leg strength.

[0048] The height between the upper surface of the pedal 4 and the bottom surface of the base plate 5 does not exceed six centimeters.

[0049] When in use, the height between the upper surface of the pedal 4 and the bottom surface of the base plate 5 does not exceed six centimeters. Generally, the height of the sole is between two and four centimeters. When a person walks, the height difference between the left and right legs generally does not exceed two centimeters, which will not affect normal walking. Therefore, when a patient uses this device, it is equivalent to adding six centimeters to the height under the feet, and the other foot can shorten the difference between the two to about two centimeters by wearing suitable shoes, thereby improving the stability of the patient during use.

[0050] Embodiment 2:

[0051] The difference between the second embodiment and the first embodiment is that;

[0052] The friction block 33 is made of elastic material, such as spring, rubber, foam and plastic.

[0053] When in use, by utilizing the elasticity of the elastic material, when the limiting screw 14 applies a thrust to the second slider 32 through the spiral transmission with the baffle 31, the second slider 32 and the friction block 33 fixed on the second slider 32 will slide toward the thigh support 1, and finally the friction block 33 will be pressed against the surface of the thigh support 1, and rub against the thigh support 1, thereby increasing the resistance of the connecting rod 3 and the calf support 11 to the relative rotation with the thigh support 1, because the friction force between the anti-sliding block 41 and the thigh support 1 is proportional to the squeezing force of the friction block 33 on the thigh support 1, and the squeezing force is proportional to the thrust exerted on the friction block 33, and is also proportional to the elastic coefficient of the friction block 33, and the friction block 33 is exerted The thrust obtained is equal to the thrust on the second slider 32 when the limit screw 14 rotates. This part of the force is mainly determined by the person who applies the force. When the friction block 33 is made of elastic material, when the thrust is constant, the smaller the elastic coefficient, the slower the pressure of the friction block 33 on the thigh support 1 increases, thereby slowing down the increase in the friction force of the friction block 33 on the thigh support 1. As a result, when the patient is pushing the second slider 32, when the second slider 32 moves the same distance, the friction force added by the friction block 33 made of the elastic material is smaller, so that the patient can control the friction resistance more accurately, so that the patient can control the size of the friction resistance more conveniently and accurately during load training in rehabilitation training.

[0054] Embodiment three;

[0055] The difference between the third embodiment and the first embodiment is that;

[0056] The foot bracket 2 is a telescopic structure that can slide up and down, including an upper bracket 28 and a lower bracket 29. The lower bracket 29 is connected to the upper bracket 28 by sliding up and down. The upper bracket 28 and the lower bracket 29 have through holes of the same size evenly distributed at corresponding positions, and pins 281 pass through the through holes.

[0057] When in use, the foot support 2 is divided into an upper support 28 and a lower support 29 which are connected by sliding up and down, and corresponding positions on the upper support 28 and the lower support 29 are evenly distributed with through holes of the same size, and pins 281 are passed through the through holes. Before the patient uses it, according to the patient's leg length, the lower support 29 is slid so that the patient's knee is located on the rotation axis of the thigh support 1 and the calf support 11, and the sole of the foot just fits with the upper surface of the pedal 4. At this time, the pin 281 is inserted into the holes of the upper support 28 and the lower support 29, so that the upper support 28 and the lower support 29 can no longer slide relative to each other, thereby fixing them, so that it can be used for patients with different leg lengths and matched with the patient. In the later stage of the patient's leg rehabilitation training, when the patient's leg strength is sufficient to support the patient to walk normally, the pin 281 can be taken out, and the part below the lower support 29 can be selectively removed according to the patient's wishes to facilitate the patient's daily activities.

[0058] Embodiment 4:

[0059] The difference between the fourth embodiment and the first embodiment is that;

[0060] A fastening rod 42 is threadedly connected below the anti-sliding block 41 . A straight groove is provided in the pedal 4 . The anti-sliding block 41 slides along the straight groove. The other end of the fastening rod 42 extends to the outside of the space between the pedal 4 and the bottom plate 5 .

[0061] A fastening rod 42 is threadedly connected to the anti-sliding block 41 below the anti-sliding block 41. Since the feet of different patients are of different sizes, the fitting position of the curved surface on the anti-sliding block 41 and the sole of the foot is also different. By rotating the fastening rod 42 threadedly connected to the anti-sliding block 41, the anti-sliding block 41 can slide, thereby adjusting the position of the anti-sliding block 41 so that the curved surface on the anti-sliding block 41 fits more closely with the sole of the foot, thereby better preventing the patient's foot from sliding. Moreover, by extending the other end of the fastening rod 42 to the outside of the space between the pedal 4 and the base plate 5, the patient does not need to put his hand into the narrow space between the pedal 4 and the base plate 5 when rotating the fastening rod 42, thereby making it more convenient for the patient to use and to adjust the position of the anti-sliding block 41.

[0062] The specific workflow is as follows:

[0063] When the patient needs to use the fixed support, first adjust the total height of the upper support 28 and the lower support 29 according to the patient's leg length to match the patient's leg length, so that when the patient's sole fits against the pedal 4, the knee is exactly at the rotation connection between the thigh support 1 and the calf support 11, then open the strap 13 and the second arc-shaped turntable 61, place the patient's thigh between the symmetrically distributed thigh supports 1, and place the calf between the symmetrically distributed calf supports 11, with the knee located on the rotation axis of the thigh support 1 and the calf support 11, and then rotate the fastening rod 42 to allow the anti-sliding block 41 to slide along the straight groove on the upper surface of the pedal 4, so that the anti-sliding block 41 fits exactly with the concave part of the patient's foot, and then rotate the fastening rod 42 in the opposite direction. Fix the anti-sliding block 41 on the pedal 4, and then fix the strap 13 to drive the thigh support 1, the calf support 11 and the protective lining 12 to firmly fix the leg, and then insert the limiting screw 14 into the threaded hole at the lower end of the appropriate thigh support 1, so that the thigh support 1 and the calf support 11 are relatively fixed and cannot rotate, and then fix the first arc-shaped rotating disk 6 and the second arc-shaped rotating disk 61, and then rotate the screw 63 to make the screw 63 press against the inner wall of the arc-shaped groove connected to the first arc-shaped rotating disk 6 and the second arc-shaped rotating disk 61, so that the arc-shaped sliding block 62 threadedly connected thereto is fixed and cannot slide, so that the position of the foot support 2 and the connecting rod 3 fixed to the arc-shaped sliding block 62 is relatively fixed, so that the foot support 2 cannot rotate, and then rotate the limiting plate 23 to the bottom plate 5. The surface of the patient is fitted, thereby limiting the rotation of the pedal 4 and the base plate 5, making the pedal 4 and the foot support 2 relatively fixed, and finally achieving relative fixation between the thigh support 1, the calf support 11, the connecting rod 3, the foot support 2, and the pedal 4, achieving complete fixation below the patient's legs, and increasing the protection for the patient. In addition, in the early postoperative life of the patient, the adjustment plate 26 can be rotated to a position fitted with the base plate 5, and the elastic force of the first spring 24 between the base plate 5 and the pedal 4 can be used to achieve walking, and the part below the knee is not stressed during walking, so as to facilitate life. After the patient's leg bones and ligaments have grown well, due to months of fixation, the leg bones and ligaments are very stiff and need rehabilitation training. First, the limit plate 23 By rotating the pedal 4 upward, the pedal 4 can rotate, and the rotation angle of the pedal 4 is controlled by controlling the rotation height of the limit plate 23, so that the patient can initially adapt to the rotation of the foot and prevent the foot rotation from pulling the leg bone and causing secondary injury. At the same time, the screw 63 can be rotated to separate it from the inner wall of the arc groove connected to the first arc turntable 6 and the second arc turntable 61, so that the patient's foot can rotate freely. After the patient's foot recovers, the limit screw 14 is inserted into the threaded holes at the lower end of different thigh supports 1 to achieve different rotation angles between the thigh support 1 and the calf support 11. The patient can gradually adapt to different rotation angles to prevent the patient's legs from being strained due to excessive angles during the rotation process. When the patient's legs can rotate freely,The limiting screw 14 can be pulled out and inserted into the threaded hole on the baffle 31, and then the leg load training can be performed to restore the leg strength. By controlling the depth of the limiting screw 14 screwed into the baffle 31, the friction force of the anti-sliding block 41 on the thigh support 1 is controlled, so that the patient can gradually adapt to different resistances during the leg rotation process to restore the leg strength.

Claims

1. An adjustable fixed support for knee joint orthopedic rehabilitation, comprising a symmetrically distributed thigh support (1), a calf support (11) rotatably connected to the lower end of the thigh support (1), a protective lining (12) fixedly connected to the thigh support (1) and the calf support (11), and a binding strap (13) fixedly connected to the protective lining (12), characterized in that: Also includes; The foot support (2) and the lower end of the thigh support (1) are also rotatably connected to a connecting rod (3), the connecting rod (3) is fixedly connected and parallel to the calf support (11), and the lower end of the connecting rod (3) is fixedly connected to the foot support (2); The pedal (4) is rotatably connected to the lower end of the symmetrically distributed foot bracket (2), the first sliding column (21) is slidably connected to the lower part of the foot bracket (2), the lower end of the first sliding column (21) is rotatably connected to the first slider (22), the first slider (22) is slidably connected to the bottom plate (5), the bottom plate (5) is parallel to the pedal (4), the lower end of the first sliding column (21) is threadedly connected to the limit plate (23), the first sliding column (21) is covered with a first spring (23) fixedly connected to the lower end of the foot bracket (2) The lower end of the first spring (24) is located on the upper surface of the limit plate (23) and is slidably connected thereto. The upper surface of the base plate (5) is provided with symmetrically distributed slide grooves. The first slider (22) slides in the slide grooves. The upper surface of the base plate (5) is threadedly connected with an array of second slide columns (25). The second slide column (25) is externally threadedly connected with an adjustment plate (26). The adjustment plate (26) is fixedly connected with a second spring (27) sleeved outside the second slide column (25). The second slide column (25) slides up and down in the pedal (4).

2. The adjustable fixing bracket for knee joint orthopedic rehabilitation according to claim 1, characterized in that: A first arc-shaped rotating disk (6) is fixedly connected between the symmetrically distributed connecting rods (3) and the symmetrically distributed foot brackets (2); one end of the first arc-shaped rotating disk (6) is rotatably connected to the second arc-shaped rotating disk (61); the other end is fixedly connected to the second arc-shaped rotating disk (61) by bolts; a smoothly connected arc-shaped sliding groove is provided inside the first arc-shaped rotating disk (6) and the second arc-shaped rotating disk (61); an arc-shaped sliding block (62) is slidably connected inside the arc-shaped sliding groove; the arc-shaped sliding block (62) is fixedly connected to the foot bracket (2); a groove is provided on the upper surface of the arc-shaped sliding block (62); a screw rod (63) is spirally driven on the side surface of the groove.

3. The adjustable fixing bracket for knee joint orthopedic rehabilitation according to claim 2, characterized in that: The upper surface of the pedal (4) is fixedly connected with an anti-sliding block (41), and the anti-sliding block (41) has an arc surface that fits with the middle concave part of the sole of a person's foot (5).

4. The adjustable fixing bracket for knee joint orthopedic rehabilitation according to claim 3, characterized in that: A fastening rod (42) is threadedly connected below the anti-sliding block (41), a straight groove is provided in the pedal (4), the anti-sliding block (41) slides along the straight groove, and the other end of the fastening rod (42) extends outside the space between the pedal (4) and the bottom plate (5).

5. The adjustable fixing bracket for knee joint orthopedic rehabilitation according to claim 4, characterized in that: The foot support (2) is a telescopic structure capable of sliding up and down and adjusting the height.

6. The adjustable fixing bracket for knee joint orthopedic rehabilitation according to claim 5, characterized in that: The upper end of the connecting rod (3) is provided with an arc groove, and the lower end of the thigh support (1) is provided with evenly distributed threaded holes. The vertical projection of the threaded holes on the connecting rod (3) is located in the arc groove, and the center of the arc groove falls on the rotation axis of the connecting rod (3) and the thigh support (1). A limit screw (14) that passes through the arc groove is threadedly connected in the threaded hole.

7. The adjustable fixing bracket for knee joint orthopedic rehabilitation according to claim 6, characterized in that: The upper end of the connecting rod (3) is slidably connected to a force applying rod (7), and the force applying rod (7) slides up and down along the connecting rod (3).

8. The adjustable fixing bracket for knee joint orthopedic rehabilitation according to claim 7, characterized in that: A groove is provided at the upper end of the connecting rod (3), and a baffle (31), a second slider (32) and a friction block (33) are arranged in sequence in the groove from the outside to the center. The baffle (31) is fixedly connected to the outside of the groove, and a threaded hole of the same specification as that on the thigh support (1) is provided on the baffle (31). The second slider (32) slides in the groove, and a friction block (33) is fixedly connected to the side of the second slider (32) away from the baffle (31), and the side of the friction block (33) opposite to the thigh support (1) is rough.

9. The adjustable fixing bracket for knee joint orthopedic rehabilitation according to claim 8, characterized in that: The height between the upper surface of the pedal (4) and the bottom surface of the base plate (5) does not exceed six centimeters.

10. The adjustable fixing bracket for knee joint orthopedic rehabilitation according to claim 9, characterized in that: The friction block (33) is made of elastic material.

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