Knee joint rehabilitation training device

Abstract

The invention discloses a knee joint rehabilitation training device, and relates to the technical field of rehabilitation equipment. The problems that in the prior art, diversified rehabilitation requirements cannot be met according to rehabilitation stages of different patients, pedal training strength is fixed and cannot adapt to individual differences, and the patients are prone to insufficient training are solved. The device specifically comprises a base, and two symmetrical openings are reserved in the top face of the base; the top face of the base is connected with a leg training assembly through a bidirectional driving structure, and the leg training assembly comprises a thigh plate hinged to the edge of the top of the opening, two sliding grooves symmetrically formed in the outer wall of the top of the base and moving blocks slidably connected to the inner walls of the sliding grooves. The joint flexibility can be improved through repeated flexion and extension actions, hip-knee-ankle joint load distribution can be synchronously adjusted, excessive load bearing of a single joint is avoided, and the structure can meet diversified rehabilitation requirements, adapt to individual differences and assist a patient to recover a normal knee flexion angle early.

Description

Technical Field

[0001] The present invention relates to the technical field of rehabilitation equipment, and particularly relates to a knee joint rehabilitation training device. Background Art

[0002] The knee joint is the largest joint in the human body and also the main load-bearing joint. In recent years, there have been numerous knee joint injury patients, including injuries to the patella, meniscus, intracapsular ligaments, extracapsular ligaments, tibial plateau, etc. And complications often occur after femoral shaft fractures and knee joint surgeries, such as quadriceps adhesion and knee joint stiffness, resulting in difficulty in knee flexion. In severe cases, secondary surgeries are often required for quadriceps muscle shaping and knee joint release. The way to prevent this is to perform knee joint functional rehabilitation exercises.

[0003] After retrieval, a patent with the Chinese patent application number CN202323035821.2 discloses a knee joint rehabilitation training device, including a frame. The frame includes two rectangular lower support members and upper support members arranged vertically, and four corner columns welded to the four corners of the lower support members and upper support members; a rehabilitation training part. The rehabilitation training part includes two symmetrically arranged "U"-shaped control rods inside the frame and two pedals rotatably installed on the inner sides below the control rods. The control rods are rotationally connected to the inner wall of the long side of the upper support member through a first rotating shaft, and the first rotating shaft is vertically installed on the inner wall of the long side of the upper support member; a seat board. The seat board is straddled and installed above the long sides on both sides of the lower support member, and the seat board is horizontally slidably installed on the lower support member; the seat board is vertically telescopic above the lower support member. The knee joint rehabilitation training device in the above patent has the following deficiencies: It can only achieve simple leg flexion and extension movements, cannot meet diverse rehabilitation needs according to the rehabilitation stages of different patients, and the training intensity of the "pedal" is fixed and cannot adapt to individual differences, so patients are prone to insufficient training. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art, and a knee joint rehabilitation training device is proposed.

[0005] In order to achieve the above purpose, the present invention adopts the following technical scheme:

[0006] A knee joint rehabilitation training device includes a base. Two symmetric openings are provided on the top surface of the base; the top surface of the base is connected to a leg training component through a bidirectional driving structure. The leg training component includes a thigh plate hinged to the top edge of the opening, two symmetrically arranged sliding grooves on the outer wall of the top of the base, a moving block slidably connected to the inner wall of the sliding groove, and a calf plate rotatably cooperating with one end of the moving block. One end of the calf plate is rotationally connected to one end of the thigh plate through a rotating shaft;

[0007] The bottom surface of the base is provided with two self-adjusting resistance components. The self-adjusting resistance components include a housing fixedly connected to the outer wall of the bottom of the base, a guide rod inserted into one side surface of the housing, a top plate and a push plate fixedly connected to both ends of the guide rod respectively, a liquid bladder fixedly connected to the opposite side surfaces of the push plate and the housing, a through groove provided on the outer wall of the bottom of the housing, a fixing plate fixedly connected to the outer wall of the bottom of the housing, more than two stretching members fixedly connected to one side surface of the fixing plate, a hook fixedly connected to one end of the stretching member, and more than two hanging rings fixedly connected to one side surface of the push plate. The push plate is slidably connected to the inner wall of the housing, and the outer wall of the push plate forms a sliding fit with the inner wall of the through groove.

[0008] Preferably: The number of the stretching members is the same as that of the hanging rings and they are relatively positioned front and back.

[0009] Preferably: A support plate is fixedly connected to one side surface of both the thigh plate and the calf plate, and a fastening belt is fixedly connected to the corresponding side surfaces of the thigh plate and the calf plate above the support plate;

[0010] One side outer wall of the calf plate is fixedly connected with a footrest, and one side surface of the top plate abuts against one side surface of the footrest.

[0011] Preferably: Support plates are rotatably connected to the outer side surfaces of both calf plates, and the tops of the two support plates are connected by a connecting member to the same U-shaped plate;

[0012] Guide columns are inserted into both side surfaces of the U-shaped plate. One end of the guide column is fixedly connected with a hollow arc-shaped plate, and a same top support member is fixedly connected to the corresponding side surfaces of the arc-shaped plate wrapping the guide column and the U-shaped plate;

[0013] A spacer pad is arranged on the inner side surface of the arc-shaped plate.

[0014] Preferably: The connecting member includes more than two rubber columns fixedly connected to one side surface of the support plate in a vertical column and equidistant manner, and limiting holes provided on both side surfaces of the U-shaped plate, and the rubber columns are adapted to the limiting holes.

[0015] Preferably: A groove is provided on the outer side surface of the calf plate near one end;

[0016] An angle gauge is fixedly connected to one side surface of the thigh plate through a V-shaped plate, and one side surface of the V-shaped plate forms a rotational fit with one side inner wall of the groove through a rotating shaft, and one end of the angle gauge penetrates through one side surface of the calf plate.

[0017] Preferably: More than two card slots are arranged in an annular array on the circumferential outer wall of the angle gauge, and a limiting card plate is arranged on the inner wall of one of the card slots.

[0018] Preferably, two supports are fixedly connected to the outer wall of the top of the base; the bidirectional driving structure includes a connecting plate slidably connected to the inner wall of the bottom of the chute, a rack fixedly connected to the outer wall of the top of the connecting plate, upper and lower transmission gears and driving gears respectively rotatably connected to the inner wall of one side of the support, a belt transmission mechanism arranged on the inner wall of one side of the support, and a handle rotatably connected to one side surface of the support. The output end and the input end of the belt transmission mechanism are respectively connected to one end of the driving gear and one end of the handle through couplings. The bottom end of the moving block is connected to the top surface of the connecting plate by bolts. The outer walls of the transmission gears are respectively meshed with the outer wall of the rack and the outer wall of the driving gear.

[0019] Preferably, a semiconductor refrigeration sheet, a heating rod and a temperature sensor are arranged on the inner wall of one side of the liquid sachet;

[0020] The infusion tube of the liquid sachet is connected to one end of a corrugated hose fixedly connected to the outer wall of the arc plate.

[0021] Preferably, a backrest is fixedly connected to the top edge of the base.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. By providing a self-adjustable resistance component, the patient first selects the corresponding number of stretching members on the fixing plate to be hung on the hanging rings according to the recovery stage of their own knee joint. Then, when performing knee joint flexion and extension rehabilitation training, when the foot pedal is driven to move towards the thigh plate, it will push the push plate to move backward through the top plate and the guide rod, and then pull the stretching member to deform, thereby causing a controllable flexion resistance to the knee joint flexion movement; when the foot pedal is driven to extend forward, the top plate will move forward under the action of the stretching member to cooperate with the foot pedal to reset, thereby providing support for the next knee joint flexion movement. It can improve joint flexibility through repeated flexion and extension movements, synchronously adjust the load distribution of the hip-knee-ankle joints, avoid excessive load on a single joint, this structure can meet diverse rehabilitation needs, can adapt to individual differences, and assist the patient to recover the normal knee joint flexion angle as soon as possible.

[0024] 2. When the foot pedal of the present invention is driven to move towards the thigh plate, it will push the push plate to squeeze the liquid sac through the top plate and the guide rod, so that the cold / hot liquid therein is transported into the arc plate for cold / heat treatment during the knee joint training. When the foot pedal is driven to extend forward, the top plate will move forward under the action of the stretching member and the hydraulic pressure in the liquid sac, cooperate with the foot pedal to reset, and then provide support for the next knee bending movement. Moreover, during the period when the liquid sac returns to its original state without being squeezed, the negative pressure generated therein can adsorb the liquid in the arc plate back into the liquid sac, thereby realizing the replacement of the liquid, so that the temperature of the liquid fitting the knee joint can be maintained for a long time, and the knee joint is cold / hot compress with the cold / hot liquid temperature therein, achieving the effects of relieving pain, etc., effectively reducing the joint fatigue in the rehabilitation training, relieving the discomfort after training, and being relatively convenient to use.

[0025] 3. Through the bidirectional drive structure provided by the present invention, the active or passive rehabilitation training actions of the knee joint from 0° to 180° can be selectively carried out according to the rehabilitation stage of the patient's knee joint, which has more humanized features and is easy to promote.

[0026] 4. The patient of the present invention can adjust the angle of each flexion and extension training by himself according to the recovery stage of his own knee joint. Just insert the limit clamping plate into a certain clamping groove at the corresponding angle. During the training, when the included angle between the calf plate and the thigh plate shrinks until the limit clamping plate abuts against one side surface of the calf plate, the limit of the knee bending training angle can be realized, which is convenient to adjust and can meet the rehabilitation training needs of different patients' knee joints.

[0027] 5. For the present invention, the patient sits on the base facing the leg training component, then pulls up the elastic fastening belt. After putting the legs on the thigh plate and the calf plate respectively, insert the feet into the two foot pedals respectively, and then loosen the elastic fastening belt. At this time, it firmly fixes the patient's legs to the support plates on the thigh plate and the calf plate, thus completing the rapid wearing work, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic side view structure diagram of a knee joint rehabilitation training device proposed by the present invention;

[0029] Figure 2 It is a schematic enlarged structure diagram of part A of a knee joint rehabilitation training device proposed by the present invention;

[0030] Figure 3 It is a schematic top view structure diagram of a knee joint rehabilitation training device proposed by the present invention;

[0031] Figure 4 It is a schematic bottom view structure diagram of a knee joint rehabilitation training device proposed by the present invention;

[0032] Figure 5 Schematic enlarged structure diagram of part B of a knee joint rehabilitation training device proposed by the present invention;

[0033] Figure 6 Schematic connection state diagram of the belt drive mechanism and the connecting plate of a knee joint rehabilitation training device proposed by the present invention.

[0034] In the figure: 1 base, 101 backrest, 2 handle, 3 support, 4 top support member, 5 housing, 501 guide rod, 502 top plate, 503 push plate, 504 through slot, 6 lower leg plate, 601 fastening strap, 7 support plate, 8 sliding groove, 9 moving block, 10 support plate, 1001 U-shaped plate, 11 thigh plate, 12 rubber column, 13 corrugated hose, 14 arc plate, 1401 spacer pad, 15 foot pedal, 16 connecting plate, 1601 rack, 17 angle scale, 18 hanging ring, 19 liquid bladder, 20 stretching member, 21 card slot, 2101 limit card plate, 22 groove, 23 belt drive mechanism, 24 transmission gear, 2401 driving gear. Specific embodiments

[0035] The technical solutions of this patent will be further described in detail below in conjunction with specific embodiments.

[0036] The embodiments of this patent are described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain this patent and should not be construed as a limitation of this patent.

[0037] Embodiment 1:

[0038] A knee joint rehabilitation training device, as Figures 1-6 shown, includes a base 1. A backrest 101 for facilitating people to lie on their backs for training and supporting the back is fixed to the top edge of the base 1 by bolts; a leg training assembly is connected to the top surface of the base 1 through a bidirectional drive structure.

[0039] Two symmetrically arranged openings are provided on the top surface of the base 1. The leg training assembly includes a thigh plate 11 hinged to the top edge of the opening, two symmetrically arranged sliding grooves 8 opened on the outer wall of the top of the base 1, a moving block 9 slidably connected to the inner wall of the sliding groove 8, and a lower leg plate 6 rotatably engaged with one end of the moving block 9. One end of the lower leg plate 6 is rotatably engaged with one end of the thigh plate 11 through a rotating shaft.

[0040] Preferably, a support plate 7 for supporting the calf is fixed to one side surface of the thigh plate 11 and the calf plate 6 by bolts, and elastic fastening belts 601 for firmly fitting and fixing the legs to the thigh plate 11 and the calf plate 6 are fixed to the corresponding side surfaces of the thigh plate 11 and / or the calf plate 6 above the support plate 7 by bolts;

[0041] Furthermore, a footrest 15 with a foot-binding belt is fixed to the outer wall of one side of the calf plate 6 by bolts; when wearing, the patient sits on the base 1 facing the leg training assembly, then pulls up the elastic fastening belt 601, places the legs on the thigh plate 11 and the calf plate 6 respectively, inserts the feet into the two footrests 15 respectively, and then releases the elastic fastening belt 601. At this time, it firmly fixes the patient's legs to the support plate 7 on the thigh plate 11 and the calf plate 6, thus completing the quick wearing work and being convenient to use. During training, the back can optionally be closely attached to the backrest 101 to achieve a sitting or lying training posture.

[0042] Two supports 3 are fixedly connected to the outer wall of the top of the base 1; the bidirectional driving structure includes a connecting plate 16 slidably connected to the inner wall of the bottom of the chute 8, a rack 1601 fixed to the outer wall of the top of the connecting plate 16 by bolts, upper and lower transmission gears 24 and driving gears 2401 respectively rotatably connected to the inner wall of one side of the support 3, a belt transmission mechanism 23 arranged on the inner wall of one side of the support 3, and a handle 2 rotatably connected to one side surface of the support 3. The output end and the input end of the belt transmission mechanism 23 are respectively connected to one end of the driving gear 2401 and one end of the handle 2 through couplings. The bottom end of the moving block 9 is connected to the top surface of the connecting plate 16 by bolts. The outer walls of the transmission gears 24 are respectively meshed with the outer wall of the rack 1601 and the outer wall of the driving gear 2401;

[0043] Preferably, the structure and principle of the belt transmission mechanism 23 are cited from the prior art and will not be elaborated here; during passive training, the patient can hold the handle 2 with both hands and control its rotation, and then drive the transmission gears 24 and the driving gear 2401 to mesh and rotate through the belt transmission mechanism 23. Under the transmission of the transmission gear 24 and the rack 1601, the connecting plate 16 makes a forward and backward sliding movement in the base 1, and then the moving block 9 is driven by the connecting plate 16 to cause the calf plate 6 to move forward and backward along the opening, so as to realize the flexion and extension angle training of the knee joint. Specifically: when the calf plate 6 is gradually approaching the thigh plate 11 passively, the connection part between the two is gradually arched and bent under extrusion, as Figure 1 shown, so as to realize the operation of curling the legs; on the contrary, when the calf plate 6 is gradually moving away from the thigh plate 11 passively, the connection part between the two is driven to be flattened, as Figure 1As shown, the leg stretching operation is thus realized, and so on, thus realizing the rehabilitation training of the knee joint. When performing the active training of curling the legs and bending the knees, the patient does not need to hold the handle 2. Just use both legs to force, use the heels and the insteps of the feet to hook and pull the foot-binding belt on the foot pedal 15, and drive the lower leg plate 6 to approach the thigh plate 11. Conversely, pushing the foot pedal 15 forward with force can drive the lower leg plate 6 and the thigh plate 11 to stretch forward, thereby realizing the straightening training of the knee joint. Through the setting of the bidirectional drive structure, the present invention can selectively perform active or passive rehabilitation training actions of 0°-180° of the knee joint according to the rehabilitation stage of the patient's knee joint, which is more user-friendly and easy to promote.

[0044] In order to increase the functionality of the equipment and improve the training effect; two self-adjusting resistance components with the same structure are arranged on the bottom surface of the base 1. The self-adjusting resistance component includes a housing 5 fixed to the outer wall of the bottom of the base 1 by bolts, a guide rod 501 inserted into one side surface of the housing 5, a top plate 502 and a push plate 503 respectively fixed to both ends of the guide rod 501 by bolts, a liquid bladder 19 fixed to the corresponding side surfaces of the push plate 503 and the housing 5 by bolts, a through groove 504 opened on the outer wall of the bottom of the housing 5, a fixing plate fixed to the outer wall of the bottom of the housing 5 by bolts, a plurality of stretching members 20 welded to one side surface of the fixing plate, a hook fixed to one end of the stretching member 20 by bolts, and a plurality of hanging rings 18 welded to one side surface of the push plate 503. The push plate 503 is slidably connected to the inner wall of the housing 5, and the outer wall of the push plate 503 forms a sliding fit with the inner wall of the through groove 504;

[0045] Preferably, the stretching member 20 can be a strong spring, and the number of the stretching members 20 is the same as that of the hanging rings 18 and their front and rear positions are opposite;

[0046] Further preferably, one side surface of the top plate 502 abuts against one side surface of the foot pedal 15; so that the top plate 502 and the structures thereon can move along with the displacement of the foot pedal 15.

[0047] When performing knee flexion and extension rehabilitation training, the patient first selects and hangs the corresponding number of stretching members 20 on the fixing plate on the suspension ring 18 according to the recovery stage of their own knee joint. Then, when the foot pedal 15 is driven to move towards the thigh plate 11, it will push the push plate 503 through the top plate 502 and the guide rod 501 to squeeze the liquid sac 19, so that the cold / hot liquid therein is transported into the arc-shaped plate 14 for heat conduction to the knee joint for cold / heat treatment during training. Moreover, when the push plate 503 moves backward, it will pull the stretching member 20 to deform, and thus will cause a controllable knee flexion resistance to the knee flexion movement; when the foot pedal 15 is driven to extend forward, the top plate 502 will move forward under the action of the stretching member 20 and the hydraulic pressure in the liquid sac 19 to cooperate with the foot pedal 15 to reset, thereby providing support for the next knee flexion movement. Moreover, during the period when the liquid sac 19 returns to its original state without being squeezed, the negative pressure generated therein can be used to adsorb the liquid in the arc-shaped plate 14 back into the liquid sac 19, so as to realize the replacement of the liquid, so that the temperature of the liquid fitting the knee joint can be maintained for a long time. The setting of this structure can improve joint flexibility through repeated flexion and extension movements, synchronously adjust the load distribution of the hip-knee-ankle joints, avoid excessive load on a single joint, and assist in restoring the normal knee flexion angle at an early date.

[0048] Rotating connections are respectively arranged on the outer sides of the two calf plates 6 with support plates 10. The tops of the two support plates 10 are connected by a connecting member to the same U-shaped plate 1001. Guide columns are inserted into both side surfaces of the U-shaped plate 1001 arranged at the two included angle positions. One end of the guide column is fixed by a bolt with an arc-shaped plate 14 in a hollow shape. A same top support member 4 is welded to the corresponding side surfaces of the arc-shaped plate 14 wrapping the guide column and the U-shaped plate 1001. In the present invention, the top support member 4 can be a spring;

[0049] Preferably, the two arc-shaped plates 14 on the same U-shaped plate 1001 are arranged opposite to each other in position;

[0050] Preferably, the connecting member includes a plurality of rubber columns 12 welded in a vertical column at equal intervals on one side surface of the support plate 10 and limit holes opened on both side surfaces of the U-shaped plate 1001, and the rubber columns 12 are adapted to the limit holes; after wearing the legs, pull the U-shaped plate 1001 upward with force to a suitable height, so that the rubber columns 12 at a certain height are inserted into the limit holes, thereby realizing the adjustment of the use height of the U-shaped plate 1001. At this time, the two arc-shaped plates 14 also firmly fit on the outer surface of the knee joint, and during training, the two arc-shaped plates 14 can always be in contact with the knee joint under the action of the top support member 4, so as to perform cold / hot compress on the knee joint by using the cold / hot liquid temperature therein, achieving the effects of relieving pain and the like.

[0051] Further preferably, a flexible spacer 1401 is adhesively bonded to the inner side surface of the arc-shaped plate 14; to avoid the direct conduction of cold / hot temperature to the human skin and cause discomfort.

[0052] Further, on one inner wall of the liquid sachet 19, a semiconductor refrigerating sheet, a heating rod and a temperature sensor (not shown in the figure) electrically connected to the control module are provided; it is used for the patient to automatically switch between the cold and hot constant temperature modes according to their own rehabilitation stage (acute stage / chronic stage), reduce joint fatigue during rehabilitation training, relieve the discomfort after training, and is relatively convenient to use.

[0053] Preferably, the infusion tube of the liquid sachet 19 is connected to one end of a corrugated hose 13 welded to the outer wall of the arc-shaped plate 14; so that the liquid can be transported in and out of the arc-shaped plate 14 according to the forward and backward extrusion movement of the push plate 503.

[0054] When this embodiment is in use, the patient first selects the corresponding number of stretching members 20 on the fixing plate and hooks them to the hanging rings 18 according to the recovery stage of their own knee joint. When wearing, the patient sits on the base 1 facing the leg training assembly, then pulls up the elastic fastening belt 601, places the legs on the thigh plate 11 and the calf plate 6 respectively, inserts the feet into the two foot pedals 15 respectively, and then releases the elastic fastening belt 601. At this time, it will firmly fix the patient's legs to the support plates 7 on the thigh plate 11 and the calf plate 6. Then pull up the U-shaped plate 1001 to an appropriate height with force, so that the rubber column 12 at a certain height is inserted into the limit hole, thereby realizing the adjustment of the use height of the U-shaped plate 1001. At this time, the two arc-shaped plates 14 also firmly fit on the outer surface of the knee joint, and during the training, the two arc-shaped plates 14 can always be kept in contact with the knee joint under the action of the top support member 4.

[0055] During the training, the back can optionally be closely attached to the backrest 101 to realize passive or active training in a sitting or lying position. When performing passive training, the patient can hold the handles 2 with both hands and manipulate their rotation, and then drive the transmission gear 24 and the driving gear 2401 to mesh and rotate through the belt transmission mechanism 23. Under the transmission of the transmission gear 24 and the rack 1601, the connecting plate 16 slides back and forth in the base 1, and then the moving block 9 is driven by the connecting plate 16, and the calf plate 6 is involved in moving back and forth along the opening, thereby realizing the flexion and extension angle training of the knee joint. Specifically: when the calf plate 6 is gradually approaching the thigh plate 11 passively, the connection part between the two is gradually arched and bent under extrusion, as Figure 1 shown, thereby realizing the curling of the legs; on the contrary, when the calf plate 6 is gradually moving away from the thigh plate 11 passively, the connection part between the two is driven to be flattened, as Figure 1 shown, thereby realizing the straightening of the legs. When performing active training to curl the legs and bend the knees, the patient does not need to hold the handle 2 with their hands. They only need to use force with both legs, use the heels and the insteps of the feet to hook and pull the binding straps on the foot pedals 15, and drive the calf plate 6 to approach the thigh plate 11. On the contrary, pushing the foot pedals 15 forward with force can drive the calf plate 6 and the thigh plate 11 to extend forward, thereby realizing the straightening training of the knee joint.

[0056] When the foot pedal 15 is driven to move towards the thigh plate 11 during passive or active knee flexion and extension rehabilitation training, it will push the push plate 503 through the top plate 502 and the guide rod 501 to squeeze the liquid bag 19, so that the cold / hot liquid therein is transported into the arc plate 14 for cold / heat treatment during knee joint training. Moreover, when the push plate 503 moves backward, it will pull the stretching member 20 to deform, and thus will cause a controllable knee flexion resistance to the knee flexion movement; when the foot pedal 15 is driven to extend forward, the top plate 502 will move forward under the action of the stretching member 20 and the hydraulic pressure in the liquid bag 19 to cooperate with the foot pedal 15 to reset, and thus provide support for the next knee flexion movement. Moreover, during the period when the liquid bag 19 returns to its original state without being squeezed, the negative pressure generated therein can be used to adsorb the liquid in the arc plate 14 back into the liquid bag 19, so as to realize the replacement of the liquid, so that the temperature of the liquid fitting the knee joint can be maintained for a long time.

[0057] Embodiment 2:

[0058] A knee joint rehabilitation training device, as Figures 3-5 shown, in order to control the knee flexion training angle; the following improvements are made in this embodiment on the basis of Embodiment 1: Grooves 22 are respectively formed on the outer sides of the two calf plates 6 near one end; on one side of each of the two thigh plates 11, an arc-shaped angle ruler 17 is fixedly connected through a V-shaped plate, and one side of the V-shaped plate forms a rotational fit with the inner wall of one side of the groove 22 through a rotating shaft, and one end of the angle ruler 17 penetrates through one side of the calf plate 6;

[0059] Preferably, a plurality of card slots 21 are annularly and arrayedly formed on the circumferential outer wall of the angle ruler 17, and a limit card plate 2101 is clamped on the inner wall of one of the card slots 21; the patient can adjust the angle of each flexion and extension training by himself according to the recovery stage of his own knee joint, and just clamp the limit card plate 2101 in a certain card slot 21 at the corresponding angle. During the training, when the included angle between the calf plate 6 and the thigh plate 11 shrinks until the limit card plate 2101 abuts against one side of the calf plate 6, the limit of the knee flexion training angle can be realized, which is convenient to adjust and can meet the rehabilitation training requirements of different patients' knee joints.

[0060] The structural members involved in the present invention, such as the base 1 and the backrest 101, can be made of materials such as aluminum alloy, which are light in weight and convenient to move.

[0061] Before training in this embodiment, the patient can adjust the angle of each flexion and extension training by himself according to the recovery stage of his own knee joint, and just insert the limit card plate 2101 into a certain card slot 21 at the corresponding angle. When performing passive or active knee joint flexion and extension rehabilitation training, when the foot pedal 15 is driven to move towards the thigh plate 11, it will push the push plate 503 to squeeze the liquid bladder 19 through the top plate 502 and the guide rod 501, so that the cold / hot liquid therein is conveyed into the arc plate 14 for temperature conduction to the knee joint for cold / heat treatment during training. Moreover, when the push plate 503 moves backward, it will pull the stretching member 20 to deform, and thus will cause a controllable knee flexion resistance to the knee flexion movement; when the foot pedal 15 is driven to extend forward, the top plate 502 will move forward under the action of the stretching member 20 and the hydraulic pressure in the liquid bladder 19 to cooperate with the foot pedal 15 to reset, and thus provide support for the next knee flexion movement. Moreover, during the period when the liquid bladder 19 returns to its original state without being squeezed, the negative pressure generated therein can be used to adsorb the liquid in the arc plate 14 back into the liquid bladder 19, so as to realize the replacement of the liquid, so that the temperature of the liquid fitting the knee joint can be maintained for a long time.

[0062] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A knee joint rehabilitation training device, comprising a base (1), characterized in that, The top surface of the base (1) is provided with two symmetric openings; the top surface of the base (1) is connected with a leg training component through a bidirectional driving structure. The leg training component includes a thigh plate (11) hinged to the top edge of the opening, two symmetrically arranged chutes (8) on the outer wall of the top of the base (1), a moving block (9) slidably connected to the inner wall of the chute (8), and a calf plate (6) rotatably engaged with one end of the moving block (9). One end of the calf plate (6) is rotatably engaged with one end of the thigh plate (11) through a rotating shaft. The bottom surface of the base (1) is provided with two self-adjusting resistance components. The self-adjusting resistance components include a housing (5) fixedly connected to the outer wall of the bottom of the base (1), a guide rod (501) inserted into one side surface of the housing (5), a top plate (502) and a push plate (503) respectively fixedly connected to both ends of the guide rod (501), a liquid bladder (19) fixedly connected to the opposite side surfaces of the push plate (503) and the housing (5), a through groove (504) arranged on the outer wall of the bottom of the housing (5), a fixing plate fixedly connected to the outer wall of the bottom of the housing (5), more than two stretching members (20) fixedly connected to one side surface of the fixing plate, a hook fixedly connected to one end of the stretching member (20), and more than two hanging rings (18) fixedly connected to one side surface of the push plate (503). The push plate (503) is slidably connected to the inner wall of the housing (5), and the outer wall of the push plate (503) forms a sliding fit with the inner wall of the through groove (504).

2. The knee joint rehabilitation training device according to claim 1, characterized in that, The number of the stretching members (20) is the same as that of the hanging rings (18), and their front and rear positions are opposite.

3. The knee joint rehabilitation training device according to claim 2, characterized in that, One side surface of both the thigh plate (11) and the calf plate (6) is fixedly connected with a support plate (7). On the side surfaces of the thigh plate (11) and the calf plate (6) located above the support plate (7), corresponding side surfaces are fixedly connected with fastening straps (601). One side wall of the calf plate (6) is fixedly connected with a foot pedal (15). One side surface of the top plate (502) abuts against one side surface of the foot pedal (15).

4. The knee joint rehabilitation training device according to claim 3, characterized in that, Both outer sides of the two calf plates (6) are rotatably connected with support plates (10). The tops of the two support plates (10) are connected with the same U-shaped plate (1001) through a connecting member. Guide columns are inserted into both side surfaces of the U-shaped plate (1001). One end of the guide column is fixedly connected with a hollow arc-shaped plate (14). The arc-shaped plate (14) wrapping the guide column and the corresponding side surface of the U-shaped plate (1001) are fixedly connected with the same top support member (4). A spacer pad (1401) is arranged on the inner side surface of the arc-shaped plate (14).

5. A knee joint rehabilitation training device according to claim 4, wherein The connecting member includes more than two rubber columns (12) fixedly connected in a vertical column at equal intervals on one side surface of the support plate (10), and limit holes arranged on both side surfaces of the U-shaped plate (1001). The rubber columns (12) are adapted to the limit holes.

6. The knee joint rehabilitation training device according to claim 5, wherein, A groove (22) is arranged on the outer side surface of the calf plate (6) near one end. One side of the thigh plate (11) is fixedly connected with an angle gauge (17) through a V-shaped plate, and one side of the V-shaped plate forms a rotational fit with the inner wall of one side of the groove (22) through a rotating shaft, and one end of the angle gauge (17) penetrates through one side of the calf plate (6).

7. A knee joint rehabilitation training device according to claim 6, characterized in that, More than two clamping grooves (21) are arranged in an annular array on the circumferential outer wall of the angle gauge (17), and a limiting clamping plate (2101) is arranged on the inner wall of one of the clamping grooves (21).

8. A knee joint rehabilitation training device according to claim 1, characterized in that, Two supports (3) are fixedly connected to the outer wall of the top of the base (1); the bidirectional driving structure includes a connecting plate (16) slidably connected to the inner wall of the bottom of the sliding groove (8), a rack (1601) fixedly connected to the outer wall of the top of the connecting plate (16), upper and lower transmission gears (24) and a driving gear (2401) respectively rotatably connected to the inner wall of one side of the support (3), a belt transmission mechanism (23) arranged on the inner wall of one side of the support (3), a handle (2) rotatably connected to one side of the support (3), and the output end and the input end of the belt transmission mechanism (23) are respectively connected to one end of the driving gear (2401) and one end of the handle (2) through couplings. The bottom end of the moving block (9) is connected to the top surface of the connecting plate (16) through a bolt, and the outer walls of the transmission gears (24) are respectively meshed with the outer walls of the rack (1601) and the driving gear (2401).

9. A knee joint rehabilitation training device according to claim 8, characterized in that, A semiconductor refrigeration sheet, a heating rod and a temperature sensor are arranged on the inner wall of one side of the liquid sachet (19). The infusion tube of the liquid sachet (19) is connected to one end of a corrugated hose (13) fixedly connected to the outer wall of the arc-shaped plate (14).

10. A knee joint rehabilitation training device according to claim 1, characterized in that, A backrest (101) is fixedly connected to the top edge of the base (1).

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