A multifunctional knee joint rehabilitation trainer

Abstract

A multifunctional knee joint rehabilitation trainer includes a thigh plate and a calf plate. The upper end of the calf plate is rotatably connected to the lower end of the thigh plate through a rotating shaft. A motor is fixedly connected to the thigh plate, and a speed reducer is connected to the output shaft of the motor. The rotating shaft is directly or indirectly fixedly connected to the output shaft of the speed reducer. Adjustable leg restraint rings are installed on both the thigh plate and the calf plate. An ankle joint mechanism is installed at the lower end of the calf plate, and a foot plate is connected to the lower end of the ankle joint mechanism. The trainer further includes a storage battery and a controller, and the motor is connected to the controller for control. This multifunctional rehabilitation trainer is beneficial for training the knee joint.

Description

Technical Field

[0001] The present invention relates to a rehabilitation trainer, particularly to a knee joint rehabilitation trainer, belonging to the technical field of rehabilitation training machinery. Background Art

[0002] Existing knee joint rehabilitation trainers are basically designed for specific use environments. For example, the CPM - joint rehabilitation trainer for use in bed during the initial stage of knee joint postoperative rehabilitation, the walking support assistor for walking assistance, and the support mechanism for long - term semi - squat positions in special working environments. These mechanisms are respectively used in different recovery periods and different scenarios of knee joint training. Therefore, for different patient conditions and training scenarios, different knee joint training equipment needs to be configured, which results in high configuration costs of training equipment, large floor space, non - uniform standards, and easier loss of accessories. At the initial stage of using the training equipment, patients also need to adapt to and become familiar with the training equipment, which is not conducive to improving the training efficiency of such patients. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above problems existing in the current knee joint rehabilitation training, and provide a multifunctional knee joint rehabilitation trainer.

[0004] To achieve the purpose of the present invention, the following technical solution is adopted: A multifunctional knee joint rehabilitation trainer includes a thigh plate and a calf plate. The upper end of the calf plate is rotatably connected to the lower end of the thigh plate through a rotating shaft. A motor is fixedly connected to the thigh plate, and a speed reducer is connected to the output shaft of the motor. The rotating shaft is directly or indirectly fixedly connected to the output shaft of the speed reducer. Adjustable leg restraint rings are installed on both the thigh plate and the calf plate. The adjustable leg restraint ring includes a long hole along the leg length direction opened on the thigh plate and the calf plate. Anti - slip teeth are provided on both sides of the long hole. Two sides of the L - shaped plate are respectively provided with front - rear long slits and left - right long slits. A cam locking rod is arranged in the long hole and the front - rear long slit. Leg restraint rings are connected to the left - right sides of the L - shaped plate. The leg restraint rings are bolt - connected in the left - right long slits. An ankle joint mechanism is installed at the lower end of the calf plate, and a foot plate is connected to the lower end of the ankle joint mechanism. The ankle joint structure includes an upper fixing plate. The upper part of the upper fixing plate is fixedly connected to the calf plate. A U - shaped groove is opened at the lower part of the upper fixing plate. The foot plate support is rotatably connected in the U - shaped groove through a rotating shaft. The upper end surface of the foot plate support is a plane, and the rotating shaft is located in the middle of the plane in the front - rear direction. Tightening mechanisms are arranged at the front and rear of the upper part of the plane. The tightening mechanism includes a deep hole along the leg length direction opened on the upper surface of the upper fixing plate and communicating with the bottom of the U - shaped groove. A spherical ball is movably arranged at the bottom of the deep hole. The diameter of the spherical ball is larger than the opening at the bottom of the deep hole. A spring is pressed on the upper part of the spherical ball. An adjusting knob is screwed in the deep hole at the upper part of the spring. The trainer also includes a storage battery and a controller, and the motor is connected to the controller for control.

[0005] Furthermore, anti-slip teeth are provided on both sides of the long hole.

[0006] Furthermore, the calf plate is a telescopic and adjustable plate. The telescopic and adjustable plate includes a fixed plate at the upper part, and the fixed plate is rotatably connected to the thigh plate. The telescopic plate is slidably inserted into the fixed plate of the multifunctional knee joint rehabilitation trainer. Corresponding long holes are provided on both the fixed plate and the telescopic plate, and the fixed plate and the telescopic plate are fixed into one body through a cam locking rod.

[0007] The positive and beneficial technical effects of the present invention are as follows: This multifunctional rehabilitation trainer drives the knee joint to move by controlling the servo motor, which can improve joint stability, relieve pain, prevent and correct joint deformities, and can assist in realizing functions such as squatting, standing, and walking, solving the problem of difficult walking for patients with knee joint deformities and injuries. It can also be used for the rehabilitation training of the knee joint during the clinical rehabilitation period. It can provide assistance for human walking, standing, and sitting postures. After the user wears this trainer, they can walk freely and can perform actions such as squatting through motor control. When the joint flexes to the ideal position of the human body, the motor is set at the locked position, and it can bear part of the human body weight. When the human body changes from a sitting posture to a standing posture, only by controlling the motor movement can it achieve an assisting effect, which is particularly important for users with insufficient leg strength to prevent falling due to insufficient leg strength during the getting-up process. In the initial stage after knee joint surgery, this rehabilitation trainer can be fixedly installed above the patient's hospital bed through a support frame, and early rehabilitation training can be carried out on the patient. The rehabilitation training can quantify the rehabilitation degree index, meet the patient's rehabilitation needs, and provide a more accurate training plan for doctors. Moreover, the patient can continue to use this rehabilitation trainer in the later stage of rehabilitation, reducing the patient's expenses. During the training, the ankle joint mechanism can keep the foot plate in a set orientation all the time, which is beneficial for quantitative and standardized training of the knee joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of a patient walking and using the training device of the present invention.

[0009] Figure 2 It is a schematic diagram of a patient lying and using the training device of the present invention.

[0010] Figure 3 It is a schematic diagram of a patient sitting and using the training device of the present invention.

[0011] Figure 4 It is a perspective schematic diagram of the ankle joint mechanism. DETAILED DESCRIPTION OF THE INVENTION

[0012] To more fully explain the implementation of the present invention, implementation examples of the present invention are provided. These implementation examples are only for the elaboration of the present invention and do not limit the scope of the present invention.

[0013] The present invention will be further explained in detail with reference to the accompanying drawings, in which the reference numerals are as follows: 1: thigh plate; 2: calf plate; 3: fixed plate; 4: telescopic plate; 5: upper fixed plate; 6: U-shaped groove; 7: rotating shaft; 8: foot plate support; 9: foot plate; 10: motor; 11: reducer; 12: long hole; 13: anti-slip teeth; 14: L-shaped part; 15: cam locking rod; 16: leg restraint ring; 17: support plate; 18: bracket; 19: deep hole; 20: spring; 21: spherical ball; 22: adjustment knob.

[0014] As shown in the accompanying drawings, a multifunctional knee joint rehabilitation trainer includes a thigh plate 1 and a calf plate 2. The upper end of the calf plate 2 is rotatably connected to the lower end of the thigh plate through a rotating shaft. The calf plate is a telescopic adjustable plate. The telescopic adjustable plate includes a fixed plate 3 at the upper part, and the fixed plate is rotatably connected to the thigh plate. A telescopic plate 4 is slidably inserted therein. Corresponding long holes are provided on both the fixed plate and the telescopic plate of the multifunctional knee joint rehabilitation trainer, and the fixed plate and the telescopic plate are fixed into one body by a cam locking rod.

[0015] A motor 10 is fixedly connected to the thigh plate. The motor 10 is a servo motor. A reducer 11 is connected to the output shaft of the motor. The rotating shaft is directly or indirectly fixedly connected to the output shaft of the reducer. Adjustable leg restraint rings 16 are installed on both the thigh plate and the calf plate. The adjustable leg restraint ring includes a long hole 12 along the leg length direction provided on the thigh plate and the calf plate, and anti-slip teeth 13 are provided on both sides of the long hole. Long slits 23 in the front-rear direction and long slits 24 in the left-right direction are respectively provided on two sides of the L-shaped plate. A cam locking rod 15 is provided in the long hole 12 and the front-rear long slit. The cam locking rod is an existing locking part and can be obtained through commercial purchase, such as a German imported GN927.3 eccentric cam locking rod. A leg restraint ring 16 is connected to the left and right sides of the L-shaped plate. The leg restraint ring is connected by bolts in the left-right long slit, and the position of the leg restraint ring can be adjusted by moving in the long slit and the long hole. An ankle joint mechanism is installed at the lower end of the calf plate, and a foot plate 9 is connected to the lower end of the ankle joint mechanism. The ankle joint structure includes an upper fixed plate 5. The upper part of the upper fixed plate is fixedly connected to the calf plate, and a U-shaped groove 6 is provided at the lower part of the upper fixed plate. A foot plate support 8 is rotatably connected in the U-shaped groove through a rotating shaft 7. The upper end surface of the foot plate support is a plane, and the rotating shaft is located in the middle of the plane in the front-rear direction. Tightening mechanisms are provided on both the front and rear of the upper part of the plane. The tightening mechanism includes a deep hole 19 along the leg length direction provided on the upper surface of the upper fixed plate and communicating with the bottom of the U-shaped groove. A spherical ball 21 is movably provided at the bottom of the deep hole. The diameter of the spherical ball is larger than the opening at the bottom of the deep hole. A spring 20 is pressed on the upper part of the spherical ball, and an adjustment knob 21 is screwed in the deep hole at the upper part of the spring. The angle of the foot plate can be adjusted by adjusting the adjustment knob. The trainer also includes a storage battery and a controller, and the motor is connected to the controller for control.

[0016] Figure 2 This is a schematic diagram when the patient lies down and uses the training device of the present invention. The training device is fixed on the support plate through a bracket.

[0017] When in use, after the patient completes wearing the device, adjust the length of the calf plate and the position of the adjustable leg restraint to adapt to different patients. Since the differences in the physical states of different patients are mostly concentrated in the legs, therefore, the adjustable part of the present invention is concentrated in the legs. Setting the leg adjustment structure can meet the usage requirements of different patients with different physical states to the greatest extent, effectively improving the adaptability of the entire device to the patient, greatly reducing the impact on the patient's rehabilitation effect, and effectively solving the technical problems of low adaptability between the lower limb rehabilitation device and the patient and affecting the rehabilitation effect in the prior art. The motor can be controlled by a controller to rotate and drive the rotating shaft to provide assistance for the patient's training.

[0018] After the embodiments of the present invention are described in detail, those skilled in the art can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent application. Any simple modifications, equivalent changes, and decorations made to the above embodiments based on the technical essence of the present invention all belong to the scope of the technical solution of the present invention, and the present invention is not limited to the embodiments described in the specification.

Claims

1. A multifunctional knee joint rehabilitation trainer, comprising a thigh plate and a calf plate, characterized in that: The upper end of the calf plate is rotationally connected to the lower end of the thigh plate through a rotating shaft. A motor is fixedly connected to the thigh plate. A speed reducer is connected to the output shaft of the motor. The rotating shaft is directly or indirectly fixedly connected to the output shaft of the speed reducer. Adjustable leg restraint rings are installed on both the thigh plate and the calf plate. The adjustable leg restraint ring includes elongated holes formed in the thigh plate and the calf plate along the leg length direction. Anti-slip teeth are provided on both sides of the elongated holes. Longitudinal slots and lateral slots are respectively formed on two sides of the L-shaped plate. A cam locking rod is arranged in the elongated holes and the longitudinal slots. Leg restraint rings are connected to the left and right sides of the L-shaped plate. The leg restraint rings are connected in the lateral slots through bolts. An ankle joint mechanism is installed at the lower end of the calf plate. The lower end of the ankle joint mechanism is connected to a foot plate. The ankle joint mechanism includes an upper fixing plate. The upper part of the upper fixing plate is fixedly connected to the calf plate. A U-shaped groove is formed in the lower part of the upper fixing plate. The foot plate shank is rotationally connected in the U-shaped groove through a rotating shaft. The upper end surface of the foot plate shank is a flat surface. The rotating shaft is located in the middle of the flat surface in the front-back direction. Tightening mechanisms are arranged at the front and back of the upper part of the flat surface. The tightening mechanism includes a deep hole formed in the upper surface of the upper fixing plate along the leg length direction and communicating with the bottom of the U-shaped groove. A spherical ball is movably arranged at the bottom of the deep hole. The diameter of the spherical ball is larger than the opening at the bottom of the deep hole. A spring is pressed on the upper part of the spherical ball. An adjusting knob is screwed in the deep hole above the spring. The trainer further includes a storage battery and a controller. The motor is connected to the controller for control; The calf plate is a telescopic adjustable plate. The telescopic adjustable plate includes an upper fixing plate. The fixing plate is rotationally connected to the thigh plate. The telescopic plate is slidably inserted into the groove of the fixing plate. Corresponding elongated holes are formed in both the fixing plate and the telescopic plate. The fixing plate and the telescopic plate are fixed into one body through a cam locking rod.

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