A knee joint assisting rehabilitation device

Abstract

The present invention is applicable to the field of rehabilitation equipment, and provides a knee joint power-assisted rehabilitation device, including a waist support, a bottom rotating shaft of the waist support is connected to a thigh transmission mechanism, a wearing ring is installed at the bottom of the thigh transmission mechanism, a thigh support is arranged below the wearing ring, length adjustment mechanisms are arranged on both sides of the thigh support, the wearing ring is connected to the length adjustment mechanism on one side, an angle adjustment mechanism is connected to the bottom of the length adjustment mechanism, the angle adjustment mechanism is connected to a calf support, and a bottom rotating shaft of the calf support is connected to a foot support. The device adopts a wearable design, is more convenient to use, is not restricted by location, relies on a light motor to provide power, replaces skeletal muscles to transmit power to the femur and tibia, and drives the human body to walk more lightly.

Description

Technical Field

[0001] The invention belongs to the field of rehabilitation equipment, and in particular relates to a knee joint power-assisted rehabilitation device. Background Art

[0002] After knee trauma, surgery, or long-term immobilization, knee flexion is often limited, and active exercise is required, otherwise it may develop into knee stiffness, leading to long-term functional impairment. In order to restore the flexion function of the knee joint, targeted training is required. Rehabilitation training requires the use of rehabilitation devices. The main functions of existing rehabilitation devices are concentrated on lower limb rehabilitation training. This type of product is mainly aimed at the treatment of patients, cannot provide assisted walking, and is large in size and single in function. Summary of the invention

[0003] In view of the above problems, the purpose of the present invention is to provide a knee joint assisted rehabilitation device, aiming to solve the technical problems that the existing knee joint assisted rehabilitation devices are large in size, single in function, and cannot provide assisted walking.

[0004] The present invention adopts the following technical solution:

[0005] The knee joint assisted rehabilitation device includes a waist support, a bottom rotating shaft of the waist support is connected to a thigh transmission mechanism, a wearing ring is installed at the bottom of the thigh transmission mechanism, a thigh support is arranged below the wearing ring, length adjustment mechanisms are arranged on both sides of the thigh support, the wearing ring is connected to the length adjustment mechanism on one side, an angle adjustment mechanism is connected to the bottom of the length adjustment mechanism, the angle adjustment mechanism is connected to a calf support, and the bottom rotating shaft of the calf support is connected to a foot support.

[0006] Furthermore, the angle adjustment mechanism includes an inner chuck and an outer chuck, the inner chuck is provided with a center column outwardly, the outer chuck is an annular structure and is mounted on the center column, the outer side of the outer chuck is recessed inward to form a mounting groove, a baffle is provided in the mounting groove, and the baffle is fixed to the center column by screws, a circle of evenly distributed grooves is provided in the outer chuck, a slide groove is provided in the center of the center column, a sliding block matching the groove is provided in the slide groove, a guide opening is provided on the baffle, and the guide opening is exposed on the outer side of the sliding block.

[0007] Furthermore, the thigh transmission mechanism includes a shell, in which a thigh transmission servo, a first gear and a second gear are arranged, the output end of the thigh transmission servo is connected to a worm gear, the worm gear is meshed with the first gear, the first gear is meshed with the second gear, and the thigh transmission mechanism also includes a connecting block, the connecting block passes through the shell and is correspondingly engaged with the second gear, and the bottom of the waist support is fixed to the connecting block.

[0008] Furthermore, the length adjustment mechanism includes fixed plates fixed on both sides of the thigh bracket, wherein the fixed plate on one side passes through the wearing ring and is fixed to the bottom of the shell of the thigh transmission mechanism, a movable plate is provided on the surface of the fixed plate, and guide grooves are provided on both the fixed plate and the movable plate, and a fixing column is inserted into the guide groove, and an adjustment buckle that can slide left and right is inserted into the bottom of the movable plate, a plurality of card interfaces are formed on one side of the movable plate, a card block corresponding to the card interface is provided in the adjustment buckle, a push-pull block is provided on one side of the adjustment buckle, and the bottom of the movable plate is fixed to the outer chuck on the corresponding side, and the length adjustment mechanism also includes a side cover for wrapping the fixed plate, the movable plate and the adjustment buckle as a whole, a push-pull opening is provided at the bottom corner of the side cover, and the push-pull block is located at the push-pull opening.

[0009] Furthermore, a limiting notch is formed near the top of the movable plate, and a limiting column is provided at the limiting notch.

[0010] Furthermore, a connecting rod is fixed to the bottom of the inner chuck, a calf transmission servo is fixed to the back of the calf bracket, and the bottom of the connecting rod is transmission-connected to the output end of the calf transmission servo.

[0011] The beneficial effects of the present invention are as follows: the present invention provides a knee joint power-assisted rehabilitation device, which adopts a wearable design, is more convenient to use, is not restricted by location, relies on a light motor to provide power, replaces skeletal muscles to transmit power to the femur and tibia, and drives the human body to walk more lightly; the device is integrated internally and does not require other accessories, so it can be easily worn by one person; it is relatively small in size, easy to wear, and applicable to a wider range of occasions; the device has two usage modes, fully automatic and semi-automatic, which can simultaneously achieve rehabilitation exercises and power assistance in daily life. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural diagram of a knee joint power-assisted rehabilitation device provided by an embodiment of the present invention from one angle;

[0013] Figure 2 is a structural diagram of the knee joint power-assisted rehabilitation device provided by an embodiment of the present invention from another angle;

[0014] Figure 3 is a structural diagram of an angle adjustment mechanism provided by an embodiment of the present invention;

[0015] Figure 4 is an exploded view of the angle adjustment mechanism provided by an embodiment of the present invention;

[0016] Figure 5 is a structural diagram of an outer chuck provided in an embodiment of the present invention;

[0017] Figure 6 is a structural diagram of a thigh transmission mechanism provided by an embodiment of the present invention;

[0018] Figure 7 is an exploded view of a thigh transmission mechanism provided by an embodiment of the present invention;

[0019] Figure 8 is a structural diagram of a side cover provided by an embodiment of the present invention;

[0020] Fig. 9 is a structural diagram of a length adjustment mechanism provided by an embodiment of the present invention;

[0021] Fig.10 It is a structural diagram of an adjustment buckle provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] In order to illustrate the technical solution of the present invention, a specific embodiment is provided below for illustration.

[0024] Figure 1 The structure of a knee joint assisted rehabilitation device provided by an embodiment of the present invention is shown. For the sake of convenience of explanation, only the parts related to the embodiment of the present invention are shown.

[0025] like Figure 1 , 2 As shown, the knee joint assisted rehabilitation device provided in this embodiment includes a waist support 1, and the bottom rotating shaft of the waist support 1 is connected to the thigh transmission mechanism 2, and a wearing ring 3 is installed at the bottom of the thigh transmission mechanism 2, and a thigh support 4 is arranged below the wearing ring 3, and length adjustment mechanisms 5 are arranged on both sides of the thigh support 4. The wearing ring 3 is connected to the length adjustment mechanism 5 on one side, and the bottom of the length adjustment mechanism 5 is connected to the angle adjustment mechanism 6, and the angle adjustment mechanism 6 is connected to the calf support 7, and the bottom rotating shaft of the calf support 7 is connected to the foot support 8.

[0026] In this embodiment, an overall wearable design is adopted, which is ready to wear and ready to use. The charging power supply is built-in and is not restricted by the use environment. The power is a micro motor, which decomposes the power that drives the lower limbs to move. The trajectory, speed and strength are changed through a gear set, so that the small motor generates a larger power, thereby driving the thigh to move. This device integrates the power mechanism into the transmission device at the thigh and calf. The thigh uses a multi-stage gear set to increase the power, and the calf uses simultaneous transmission on both sides to improve stability. When used specifically, the waist support is fixed at the waist. The waist support does not move during transmission and acts as a fulcrum. The waist fixing belt is made of cotton cloth and other materials, which is conducive to fitting the human body and bringing comfort. The wearing ring is a snap-on structure that can be freely loosened or clamped, and one end of the wearing ring is provided with a number of teeth to adjust the length.

[0027] like Figure 3-5 As shown, the angle adjustment mechanism 6 includes an inner chuck 61 and an outer chuck 62, wherein the inner chuck 61 is provided with a center column 63 outwardly, the outer chuck 62 is an annular structure and is matched and mounted on the center column 63, the outer side of the outer chuck 62 is inwardly recessed to form a mounting groove, a baffle 64 is provided in the mounting groove, and the baffle 64 is fixed to the center column 63 by screws, a circle of evenly distributed slots 65 is provided in the outer chuck 62, a slide groove is provided in the center of the center column 63, a sliding block 66 matching the slot 65 is provided in the slide groove, a guide port is provided on the baffle 64, and the guide port is exposed on the outer side of the sliding block 66. Under normal circumstances, the sliding block does not need to be locked into the slot, and the connection between the outer chuck and the inner chuck shaft can enable the thigh and calf to bend normally; when the calf is bent to a certain extent, the sliding block is pushed to lock it into the slot, and the outer chuck and the inner chuck are locked, and at this time, the device can play a role of replacing plaster.

[0028] like Figure 6 , 7 As shown, the thigh transmission mechanism 2 includes a housing 21, in which a thigh transmission servo 22, a first gear 23 and a second gear 24 are arranged. A worm 25 is connected to the output end of the thigh transmission servo 22, and the worm 25 is meshed with the first gear 23, and the first gear 23 is meshed with the second gear 24. The thigh transmission mechanism 2 also includes a connecting block 26, which passes through the housing 21 and is correspondingly engaged with the second gear 24. The bottom of the waist support 1 is fixed to the connecting block 26. In specific implementation, the thigh transmission servo drives the worm to rotate, the worm drives the first gear and the second gear to rotate, and the second gear drives the waist support to rotate through the connecting block. Since the waist support is fixed to the waist and does not rotate, a reaction force will be formed on the thigh to form a leg-lifting action.

[0029] like Figure 8-10As shown, the length adjustment mechanism 5 includes a fixed plate 51 fixed on both sides of the thigh bracket 4, wherein the fixed plate 51 on one side passes through the wearing ring 3 and is fixed to the bottom of the shell 21 of the thigh transmission mechanism 2, a movable plate 52 is provided on the surface of the fixed plate 51, and guide grooves 53 are provided on the fixed plate 51 and the movable plate 52, and a fixing column 54 is inserted into the guide groove 53, and an adjustment buckle 55 that can slide left and right is inserted into the bottom of the movable plate 52, a plurality of card interfaces 56 are formed on one side of the movable plate 52, and a card block 57 corresponding to the card interface 56 is provided in the adjustment buckle 55, and a push-pull block 58 is provided on one side of the adjustment buckle 55, and the bottom of the movable plate 52 is fixed to the outer chuck 61 on the corresponding side, and the length adjustment mechanism 5 also includes a side cover 59 for wrapping the fixed plate 51, the movable plate 52 and the adjustment buckle 55 as a whole, and a push-pull opening is provided at the bottom corner of the side cover 59, and the push-pull block 58 is located at the push-pull opening. Since everyone has different heights and legs, the length of the device can be adjusted through the length adjustment mechanism to facilitate wearing by users of different heights. In specific implementation, the adjustment buckle is pushed inward, and the movable plate can move up and down around the fixed column to adjust the length; after the adjustment is completed, the adjustment buckle is pulled outward, and the card block in the adjustment buckle can be inserted into the corresponding card interface to lock the movable plate.

[0030] Preferably, a limiting notch is formed near the top of the movable plate, and a limiting column is provided at the limiting notch, and the limiting column can limit the moving range of the movable plate.

[0031] As a specific structure, a connecting rod 9 is fixed to the bottom of the inner chuck 62, a calf transmission servo 71 is fixed to the back of the calf bracket 7, and the bottom of the connecting rod 9 is transmission-connected to the output end of the calf transmission servo 71. When the calf transmission servo is driven, the entire calf part will rotate around the servo drive position. When worn on the human body, there will be a force at the knee joint of the human body to block the movement of the calf part. Since the connecting rods on both sides of the thigh are pin-connected to the thigh, the resistance will cause the connecting rod and the calf part to move as a whole around the thigh pin connection, forming a bending movement of the knee.

[0032] This device has two usage modes: fully automatic and semi-automatic. The fully automatic mode is mainly aimed at users who cannot walk normally due to muscle atrophy caused by long-term bed rest. It relies on a light motor to provide power, instead of skeletal muscles to transmit power to the femur and tibia, while driving the user to walk in small amplitudes, while performing some simple rehabilitation training for the legs; the semi-automatic mode mainly plays the role of assisting walking. When the motor stops, the lock on the gear set is released, and the internal spring is used to assist walking, increasing the strength of the knee joint when lifting the thigh and squatting (sitting), reducing the pressure on the knee and relieving knee fatigue injuries.

[0033] In addition, the device uses an aluminum alloy frame to ensure load-bearing capacity, and some transmission parts use ABS engineering plastics; the waist fixing belt and shell are made of nylon 3D printing material, which has good toughness and fit to the human body; the inner layer is made of OK cloth flexible material, which is more comfortable to wear. The transmission mechanism uses pu carbon steel springs, which have high elasticity and stress resistance, are not easy to rust and are easy to clean.

[0034] To sum up, the present invention provides a knee joint assisted rehabilitation device, which adopts a wearable design, is more convenient to use, is not restricted by location, relies on a light motor to provide power, replaces skeletal muscles to transmit power to the femur and tibia, and drives the human body to walk more lightly; the device is integrated internally and does not require other accessories, so it can be easily worn by one person; it is relatively small in size, easy to wear, and applicable to a wider range of occasions; the device has two usage modes, fully automatic and semi-automatic, which can simultaneously realize rehabilitation exercises and assistance in daily life.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A knee joint assisting rehabilitation device, characterized in that: The invention comprises a waist support, wherein the bottom of the waist support is connected to a thigh transmission mechanism, the bottom of the thigh transmission mechanism is connected to a wearing ring, a thigh support is arranged below the wearing ring, length adjustment mechanisms are arranged on both sides of the thigh support, the wearing ring is installed to the length adjustment mechanism on one side, the bottom of the length adjustment mechanism is connected to an angle adjustment mechanism, the angle adjustment mechanism is connected to a calf support, and the bottom shaft of the calf support is connected to a foot support; the angle adjustment mechanism comprises an inner chuck and an outer chuck, the inner chuck is provided with a central column outwardly, the outer chuck is an annular structure and is matched to be installed on the central column, the outer side of the outer chuck is inwardly recessed to form a mounting groove, a baffle is arranged in the mounting groove, the baffle is fixed to the central column by screws, a circle of evenly distributed slots is arranged in the outer chuck, a slide groove is arranged in the center of the central column, a sliding block matching the slot is arranged in the slide groove, a guide port is arranged on the baffle, and the guide port is exposed on the outer side of the sliding block; the thigh transmission mechanism comprises a shell, a thigh transmission servo, a first gear are arranged in the shell and a second gear, a worm is connected to the output end of the thigh transmission servo, the worm is meshed with the first gear, the first gear is meshed with the second gear, the thigh transmission mechanism also includes a connecting block, the connecting block passes through the shell and is correspondingly engaged with the second gear, and the bottom of the waist bracket is fixed to the connecting block; the length adjustment mechanism includes a fixed plate fixed to both sides of the thigh bracket, wherein the fixed plate on one side passes through the wearing ring and is fixed to the bottom of the shell of the thigh transmission mechanism, a movable plate is provided on the surface of the fixed plate, and guide grooves are provided on the fixed plate and the movable plate, and a fixed column is inserted into the guide groove, and an adjustment buckle that can slide left and right is inserted into the bottom of the movable plate, and a plurality of card interfaces are formed on one side of the movable plate, and a card block corresponding to the card interface is provided in the adjustment buckle, and a push-pull block is provided on one side of the adjustment buckle, and the bottom of the movable plate is fixed to the outer chuck on the corresponding side, and the length adjustment mechanism also includes a side cover for wrapping the fixed plate, the movable plate and the adjustment buckle as a whole, and a push-pull opening is provided at the bottom corner position of the side cover, and the push-pull block is located at the push-pull opening position.

2. The knee joint assist rehabilitation device as claimed in claim 1, characterized in that: The movable plate forms a limiting notch near the top, and a limiting column is provided at the limiting notch.

3. The knee joint assist rehabilitation device as claimed in claim 2, characterized in that: A connecting rod is fixed at the bottom of the inner chuck, a calf transmission servo is fixed at the back of the calf bracket, and the bottom of the connecting rod is transmission-connected with the output end of the calf transmission servo.

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