Rehabilitation training device for lower limb fracture patient

Abstract

The invention relates to the technical field of medical rehabilitation instruments, in particular to a rehabilitation training device for lower limb fracture patients, and aims at solving the problem that orthopedic lower limb postoperative rehabilitation training faces many challenges in China at present. According to Chinese lower limb fracture postoperative load bearing expert consensus (2023), early-stage reasonable load bearing exercise is crucial to postoperative rehabilitation, but many difficulties exist in actual operation. Firstly, patients are mainly trained by themselves after being discharged from hospitals, doctors can only provide rough suggestions, and accurate rehabilitation guidance means are lacked. Secondly, the existing rehabilitation equipment has the obvious defects that electronic control equipment is high in cost, depends on power supply and fails in function during power failure; automatic switching of weight reduction is difficult to realize in a supporting phase and a swinging phase in a gait cycle; according to the rehabilitation training device for the lower limb fracture patient, a mechanical transmission structure is adopted, the equipment cost is reduced, and the rehabilitation training device has the advantages of being low in cost, high in safety, high in adaptability and capable of accurately simulating multi-direction movement of feet.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical rehabilitation equipment, in particular to a lower limb fracture patient rehabilitation training device. BACKGROUND

[0002] At present, the postoperative rehabilitation training of lower limbs in orthopedics in China is facing many challenges. According to the "China Lower Limb Fracture Postoperative Weight-bearing Expert Consensus (2023)", early and reasonable weight-bearing exercise is crucial for postoperative rehabilitation, but there are many difficulties in actual operation. First of all, patients mainly rely on self-training after discharge, and doctors can only provide general recommendations, lacking precise rehabilitation guidance means. Secondly, the existing rehabilitation equipment has obvious defects: electronic control type equipment is high in cost and depends on power supply, and loses function when power is off; it is difficult to realize automatic switching of reduced weight in the support phase and swing phase of gait cycle; the equipment lacks flexibility and cannot adapt to the needs of different rehabilitation stages; more importantly, there is a lack of reliable mechanical emergency protection mechanism, which poses a safety hazard. In addition, the existing equipment has limited simulation capability for multi-directional movement of the foot, making it difficult to achieve precise rehabilitation training effect. These problems seriously restrict the rehabilitation effect and safety of patients after lower limb surgery. The industry has not reached a consensus on the basic concepts and operation points of lower limb postoperative rehabilitation, and it is urgent to develop a more safe, reliable and adaptable rehabilitation training device. SUMMARY

[0003] The purpose of the present application is to solve the existing problems and provide a lower limb fracture patient rehabilitation training device.

[0004] The technical solution of the present application is as follows: a lower limb fracture patient rehabilitation training device, comprising a support frame assembly, a gait training platform assembly, a lower limb fixation and driving assembly, and an auxiliary suspension and guidance assembly. The support frame assembly provides support for the gait training platform assembly, the lower limb fixation and driving assembly, and the auxiliary suspension and guidance assembly. The gait training platform assembly is arranged on the support frame assembly and is used to form a support surface simulating walking gait. The lower limb fixation and driving assembly is connected with the gait training platform assembly and is used to fix the lower limbs of the trainee and provide driving force for rehabilitation movement. The auxiliary suspension and guidance assembly is connected to the support frame assembly and is used to provide suspension assistance and movement guidance to the trainee.

[0005] The lower limb fixation and driving assembly includes a leg fixation mechanism, a driving wheel, a transmission belt, and a power unit. The leg fixation mechanism has two, and each leg fixation mechanism is provided with a sensor. The outer side of each leg fixation mechanism is provided with a binding structure for binding and fixing the lower limbs. The power unit drives the driving wheel to rotate through the transmission belt. The driving wheel is in transmission connection with the leg fixation mechanism to drive the lower limbs to perform rehabilitation movement.

[0006] The inside of the leg fixing mechanism comprises a foot fixing seat, a multi-gear meshing transmission unit, a rope traction unit and a spring buffering unit, the foot fixing seat is used for fixing the feet of the trainer, the multi-gear meshing transmission unit is connected with the leg fixing mechanism and drives the foot movement through gear transmission, one end of the rope of the rope traction unit is connected with the multi-gear meshing transmission unit, the other end is connected with the foot fixing seat to pull the foot movement, and the spring buffering unit is used for providing a buffering reset force for the foot movement.

[0007] As a preferred technical solution, the support frame assembly comprises vertical support columns, transverse connecting rods and a bottom support base, the vertical support columns are fixed vertically at the ends of the bottom support base, and the transverse connecting rods are connected between the vertical support columns to enhance the structural stability.

[0008] As a preferred technical solution, the gait training platform assembly comprises a conveyor belt mechanism, a platform base and an anti-skid layer, the conveyor belt mechanism is installed on the platform base, the anti-skid layer is laid on the conveying surface of the conveyor belt mechanism, and the platform base is fixedly connected with the support frame assembly.

[0009] As a preferred technical solution, the multi-gear meshing transmission unit comprises mutually meshing gears, one of which is connected with a power member for driving, and at least two gears are respectively connected with different parts of the foot through connecting rods or ropes to realize multi-directional rehabilitation movement of the foot.

[0010] As a preferred technical solution, the rope traction unit comprises at least two ropes, one end of the rope is connected with the eccentric part of the gear of the multi-gear meshing transmission unit through a rotatable connecting head, and the other end is respectively connected with the metatarsal part and the heel part of the foot fixing seat to pull the foot to complete flexion and extension movements.

[0011] As a preferred technical solution, the leg fixing mechanism comprises a leg fixing ring and a gear adjusting assembly, the gear adjusting assembly is arranged on the leg fixing ring and is used for adjusting the transmission parameters of the multi-gear meshing transmission unit to adapt to different training requirements.

[0012] As a preferred technical solution, the leg fixing mechanism is a cylindrical structure made of flexible rubber material, and the inside of the leg fixing mechanism is provided with a sponge cushion layer.

[0013] As a preferred technical solution, the auxiliary suspension guide assembly comprises a suspension bracket, a guide pulley and a suspension belt, the suspension bracket is fixedly connected to the top end of the support frame assembly, the guide pulley is rotatably arranged on the suspension bracket, and the suspension belt passes through the guide pulley to suspend the torso of the auxiliary trainer.

[0014] As a preferred technical solution, it further comprises an anti-skid disc arranged below the bottom support base of the support frame assembly.

[0015] As a preferred technical solution, the lower limb fixing and driving assembly is provided with a data acquisition system, the data acquisition system can transmit the data collected from the lower limb fixing and driving assembly to the computer in real time, and display on the display, and the display is connected to the gait training platform assembly through the fixing rod.

[0016] The application has the advantages that:

[0017] The lower limb fracture patient rehabilitation training device provided by the application and the support frame assembly, the gait training platform assembly, the lower limb fixing and driving assembly and the auxiliary suspension guiding assembly, through the cooperation of the multi-gear meshing transmission unit and the rope traction unit, the foot movement trajectory is accurately controlled, the spring buffer unit is combined to realize safe buffering, the mechanical transmission structure is adopted to reduce the equipment cost, has the advantages of low cost, high safety, strong adaptability and accurate simulation of multi-directional foot movement, effectively solves the sliding problem of the lower limb rehabilitation training device caused by unstable support, can still maintain the stability of the device when the power is interrupted or a sudden external force impact occurs, reduces the risk of falling of the trainer caused by the displacement of the device. The anti-skid disc realizes anti-skid through physical friction, avoids the safety hidden danger caused by the failure of the electronic system, and is suitable for various training environments such as hospitals and families. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a perspective view of the application;

[0019] Figure 2 is a structural schematic view of the lower limb fixing and driving assembly of the application;

[0020] Figure 3 is a structural schematic view of the leg fixing mechanism of the application;

[0021] Figure 4 is a perspective structural schematic view of the outer frame of the application;

[0022] In the drawings: 1, support frame assembly; 2, gait training platform assembly; 3, lower limb fixing and driving assembly; 4, auxiliary suspension guiding assembly; 5, foot fixing seat; 6, multi-gear meshing transmission unit; 7, rope traction unit; 8, spring buffer unit; 9, leg fixing ring; 10, gear adjusting assembly; 11, anti-skid disc; 12, display; 101, vertical support column; 102, transverse connecting rod; 103, support seat; 201, conveyor belt mechanism; 202, platform base; 203, anti-skid layer; 301, leg fixing mechanism; 302, driving wheel; 303, transmission belt; 304, power unit; 401, suspension bracket; 402, guiding pulley; 403, suspension belt; 601, gear; 701, rope. DETAILED DESCRIPTION

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figures 1-4 As shown, a rehabilitation training device for patients with lower limb fractures includes a support frame assembly 1, a gait training platform assembly 2, a lower limb fixation and drive assembly 3, and an auxiliary suspension guide assembly 4. The support frame assembly 1 provides support for the gait training platform assembly 2, the lower limb fixation and drive assembly 3, and the auxiliary suspension guide assembly 4. The gait training platform assembly 2 is disposed on the support frame assembly 1 to form a support surface for simulating walking gait. The lower limb fixation and drive assembly 3 is connected to the gait training platform assembly 2 to fix the lower limb of the trainee and provide driving force for rehabilitation movements. The auxiliary suspension guide assembly 4 is connected to the support frame assembly to provide suspension assistance and movement guidance for the trainee.

[0025] The lower limb fixation and drive assembly 3 includes a leg fixation mechanism 301, a drive wheel 302, a transmission belt 303, and a power unit 304. There are two leg fixation mechanisms 301, each of which is equipped with a sensor. Each leg fixation mechanism 301 has a strap structure 302 on its outer side for binding and fixing the lower limb. The power unit 304 drives the drive wheel 302 to rotate through the transmission belt 303. The drive wheel 302 is connected to the leg fixation mechanism 301 to drive the lower limb to perform rehabilitation exercises.

[0026] The leg fixation mechanism 301 includes a foot fixation seat 5, a multi-gear meshing transmission unit 6, a rope traction unit 7, and a spring buffer unit 8. The foot fixation seat 5 is used to fix the trainee's foot. The multi-gear meshing transmission unit 6 is connected to the leg fixation mechanism 301 and drives the foot movement through gear transmission. One end of the rope of the rope traction unit 7 is connected to the multi-gear meshing transmission unit 6, and the other end is connected to the foot fixation seat to pull the foot movement. The spring buffer unit 8 is used to provide cushioning and restoring force for the foot movement.

[0027] Existing technologies use electric actuators to adjust weight reduction. This solution achieves adaptive adjustment of weight reduction parameters through mechanical matching of spring stiffness and rope traction length. Compared to the active protection mechanism of electronic systems, the spring buffer unit provides passive mechanical limit protection, immediately generating a reverse force in the event of a sudden overload.

[0028] Further, the support frame assembly 1 comprises vertical support columns 101, transverse connecting rods 102 and a bottom support base 103, the vertical support columns 101 are fixed vertically at the ends of the bottom support base 103, and the transverse connecting rods 102 are connected between the vertical support columns 101 to enhance the structural stability; the vertical support column 101 refers to a load-bearing member extending in the vertical direction, which can be made of high-strength steel material and fixed at the ends of the bottom support base 103 by welding or bolt connection, and its function is to form a longitudinal main load-bearing structure to transfer the load from the gait training platform and the driving assembly.

[0029] Further, the gait training platform assembly 2 comprises a conveyor belt mechanism 201, a platform base 202 and a non-slip layer 203, the conveyor belt mechanism 201 is installed on the platform base 202, and the non-slip layer 203 is laid on the conveying surface of the conveyor belt mechanism 201, and the platform base 202 is fixedly connected with the support frame assembly 1.

[0030] Further, the multi-gear meshing transmission unit 6 comprises gears 601 meshing with each other, one of which is connected with a power member for driving, and at least two gears are respectively connected with different parts of the foot through connecting rods or ropes to realize multi-directional rehabilitation movement of the foot, which can be realized by a combination of spur gears, bevel gears or planetary gears, and the input of a single power source is converted into multiple output directions through the meshing relationship between the gears.

[0031] Further, the rope traction unit 7 comprises at least two ropes 701, one end of the rope 701 is connected with the eccentric part of the gear 601 of the multi-gear meshing transmission unit 6 through a rotatable connecting head, and the other end is connected with the forefoot and heel parts of the foot fixing base 5 respectively to pull the foot to complete flexion and extension movements, wherein the rotatable connecting head refers to a movable joint that allows the rope to adjust the angle freely in three-dimensional space, which can be realized by a ball hinge joint or a universal joint structure, and its function is to avoid motion interference or stress concentration caused by angle change during rope traction.

[0032] Further, the leg fixing mechanism 301 comprises a leg fixing ring 9 and a gear adjusting assembly 10, the gear adjusting assembly 10 is arranged on the leg fixing ring 9 and is used to adjust the transmission parameters of the multi-gear meshing transmission unit 6 to adapt to different training needs.

[0033] Further, the leg fixing mechanism 301 is a cylindrical structure made of flexible rubber material, and the inside of the leg fixing mechanism 301 is provided with a sponge cushion layer.

[0034] Further, the auxiliary suspension and guiding assembly 4 comprises a suspension bracket 401, a guiding pulley 402 and a suspension belt 403. The suspension bracket 401 is fixedly connected to the top end of the support frame assembly 1. The guiding pulley 402 is rotatably arranged on the suspension bracket 401. The suspension belt 403 passes through the guiding pulley 402 to suspend the trainer's torso.

[0035] Further, the anti-skid disc 11 is arranged below the bottom support seat of the support frame assembly 1.

[0036] The application further proposes that the lower limb fixing and driving assembly 3 is provided with a data acquisition system. The data acquisition system can transmit the data collected from the lower limb fixing and driving assembly 3 to a computer in real time and display the data on the display 12. The display 12 is connected to the gait training platform assembly 2 through a fixing rod.

[0037] Through the above technical solution, the application effectively solves the problem of sliding of the lower limb rehabilitation training device caused by unstable support. The device can still maintain stability when power is interrupted or sudden external force impact occurs, thereby reducing the risk of falling of the trainer caused by displacement of the equipment. The anti-skid disc realizes anti-skid through physical friction, avoiding the safety hazards caused by failure of the electronic system, and is suitable for various training environments such as hospitals and families.

[0038] The data acquisition system refers to a sensor and a signal processing module integrated in the lower limb fixing and driving assembly 2. Specifically, the data acquisition system can be realized by combining a pressure sensor, an angle sensor and an acceleration sensor, and is used to collect mechanical parameters and joint activity data in the lower limb movement process in real time. The computer refers to a central processing unit connected to the data acquisition system through a wired or wireless communication protocol. Specifically, the computer can be realized by an embedded processor or an external host, and is used to analyze the collected data in real time and generate visual feedback. The display refers to an output device with a graphical interface. Specifically, the display can be realized by a liquid crystal display or a touch screen, and is rigidly connected to the gait training platform assembly through a fixing rod, so as to ensure that the screen position is stable and within the field of view of the trainer.

[0039] Although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacements to part of the technical features, as long as the modifications, equivalent replacements and improvements are within the spirit and principles of the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. A rehabilitation training device for patients with lower limb fractures, characterized in that, The device includes a support frame assembly (1), a gait training platform assembly (2), a lower limb fixation and drive assembly (3), and an auxiliary suspension guide assembly (4). The support frame assembly (1) provides support for the gait training platform assembly (2), the lower limb fixation and drive assembly (3), and the auxiliary suspension guide assembly (4). The gait training platform assembly (2) is disposed on the support frame assembly (1) to form a support surface for simulating walking gait. The lower limb fixation and drive assembly (3) is connected to the gait training platform assembly (2) to fix the trainee's lower limbs and provide driving force for rehabilitation exercises. The auxiliary suspension guide assembly (4) is connected to the support frame assembly. The lower limb fixation and drive assembly (3) includes a leg fixation mechanism (301), a drive wheel (302), a transmission belt (303), and a power unit (304). There are two leg fixation mechanisms (301), each of which is equipped with a sensor. Each leg fixation mechanism (301) has a strap structure (302) for binding and fixing the lower limb on its outer side. The power unit (304) drives the drive wheel (302) to rotate through the transmission belt (303). The drive wheel (302) is connected to the leg fixation mechanism (301) to drive the lower limb to perform rehabilitation exercises. The leg fixation mechanism (301) includes a foot fixation seat (5), a multi-gear meshing transmission unit (6), a rope traction unit (7), and a spring buffer unit (8). The foot fixation seat (5) is used to fix the trainee's foot. The multi-gear meshing transmission unit (6) is connected to the leg fixation mechanism (301) and drives the foot movement through gear transmission. One end of the rope of the rope traction unit (7) is connected to the multi-gear meshing transmission unit (6), and the other end is connected to the foot fixation seat to pull the foot movement. The spring buffer unit (8) is used to provide cushioning and restoring force for the foot movement.

2. The rehabilitation training device for patients with lower limb fractures according to claim 1, characterized in that: The support frame assembly (1) includes a vertical support column (101), a horizontal connecting rod (102), and a bottom support base (103). The vertical support column (101) is vertically fixed to the end of the bottom support base (103), and the horizontal connecting rod (102) is connected between the vertical support columns (101) to enhance structural stability.

3. The rehabilitation training device for patients with lower limb fractures according to claim 1, characterized in that: The gait training platform component (2) includes a conveyor belt mechanism (201), a platform base (202), and an anti-slip layer (203). The conveyor belt mechanism (201) is installed on the platform base (202), the anti-slip layer (203) is laid on the conveying surface of the conveyor belt mechanism (201), and the platform base (202) is fixedly connected to the support frame component (1).

4. The rehabilitation training device for patients with lower limb fractures according to claim 1, characterized in that: The multi-gear meshing transmission unit (6) includes meshing gears (601), one of which is connected to a power component for driving, and at least two gears are respectively connected to different parts of the foot via connecting rods or ropes to realize multi-directional rehabilitation movements of the foot.

5. A rehabilitation training device for patients with lower limb fractures according to claim 4, characterized in that: The rope traction unit (7) includes at least two ropes (701). One end of the rope (701) is connected to the eccentric part of the gear (601) of the multi-gear meshing transmission unit (6) through a rotatable connector, and the other end is connected to the forefoot part and the heel part of the foot fixing seat (5) respectively, so as to traction the foot to complete flexion and extension movements.

6. A rehabilitation training device for patients with lower limb fractures according to claim 5, characterized in that: The leg fixing mechanism (301) includes a leg fixing ring (9) and a gear adjustment assembly (10). The gear adjustment assembly (10) is disposed on the leg fixing ring (9) and is used to adjust the transmission parameters of the multi-gear meshing transmission unit (6) to adapt to different training needs.

7. The rehabilitation training device for patients with lower limb fractures according to claim 1, characterized in that: The leg fixing mechanism (301) is a cylindrical structure made of flexible rubber material, and the interior of the leg fixing mechanism (301) is provided with a sponge cushioning layer.

8. The rehabilitation training device for patients with lower limb fractures according to claim 1, characterized in that: The auxiliary suspension guide assembly (4) includes a suspension bracket (401), a guide pulley (402), and a suspension belt (403). The suspension bracket (401) is fixedly connected to the top of the support frame assembly (1). The guide pulley (402) is rotatably mounted on the suspension bracket (401). The suspension belt (403) passes around the guide pulley (402) to suspend the torso of the trainee.

9. A rehabilitation training device for patients with lower limb fractures according to claim 1, characterized in that: It also includes an anti-slip disc (11), which is disposed below the bottom support of the support frame assembly (1).

10. A rehabilitation training device for patients with lower limb fractures according to any one of claims 1-9, characterized in that: The lower limb fixation and drive assembly (3) is equipped with a data acquisition system. The data acquisition system can transmit the data collected from the lower limb fixation and drive assembly (3) to the computer in real time and display it on the monitor (12). The monitor (12) is connected to the gait training platform assembly (2) through a fixing rod.

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