Knee hyperextension assistance trainer

Abstract

The application belongs to the field of medical correction apparatuses, and particularly relates to a knee hyperextension auxiliary training device, which comprises a thigh band, a lower leg band and an active training unit. The thigh band and the lower leg band are connected with a first flexible connecting belt and an elastic belt. The active training unit comprises an upper connecting arm, a lower connecting arm, a power module, a control switch module and a prompt module. The upper connecting arm is arranged on the front side of the thigh band and extends obliquely downward, and the lower connecting arm is arranged on the front side of the lower leg band and extends obliquely upward. When a user is walking or standing, if the knee joint is stretched beyond the normal physiological range, the upper connecting arm and the lower connecting arm are in contact, and the upper connecting arm, the lower connecting arm, the power module, the control switch module and the prompt module form a closed loop. The prompt module sends sound, vibration and / or electric stimulation to remind the user that the knee is hyperextended, so that the user actively adjusts the knee extension state, reestablishes the correct nerve control mode through active training, and improves the gait.

Description

Technical Field

[0001] This application belongs to the field of medical orthopedic devices, specifically relating to a knee hyperextension assistive training device. Background Technology

[0002] Knee hyperextension refers to the knee joint extending beyond its normal physiological range (usually 0 degrees), forming a backward-convex arch. It commonly occurs when standing or walking and can lead to increased pressure on the joint structures, causing pain or injury. Clinically, it can be corrected using specialized assistive training devices to improve the degree of knee hyperextension.

[0003] Existing knee hyperextension correction devices rely on elastic bands or torque devices to apply passive resistance, limiting knee hyperextension solely through mechanical stretching or resistance, lacking an active feedback mechanism. This passive training cannot effectively activate the patient's neuromuscular control ability, making it difficult to reconstruct correct movement patterns and thus having certain limitations. Furthermore, existing devices cannot monitor knee hyperextension in real time, preventing patients from promptly recognizing abnormal postures, resulting in low correction efficiency. The lack of immediate reminder functions, relying on patient self-adjustment, makes them prone to failure due to fatigue or distraction. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide a knee hyperextension assistive trainer that allows users to perceive the knee extension state in a timely manner, re-establish the correct neural control pattern through active training, and improve the dynamic stability in the gait cycle.

[0005] This application provides a knee hyperextension assistive training device, comprising: Thigh straps; The calf strap has a first flexible connecting strap and an elastic strap connected between the thigh strap and the calf strap, and the elastic strap is located on the back of the leg when in use; The active training unit includes an upper connecting arm, a lower connecting arm, a power module, a control switch module, and a prompting module. The upper connecting arm is located on the front side of the thigh strap and extends diagonally downward, while the lower connecting arm is located on the front side of the calf strap and extends diagonally upward. When the ends of the upper and lower connecting arms are in contact, the upper connecting arm, the lower connecting arm, the power module, the control switch module, and the prompting module form a closed loop. The prompting module emits sound, vibration, and / or electrical stimulation reminders.

[0006] Optionally, the prompting module includes at least one of a buzzer, a vibration motor, and electrode plates.

[0007] Optionally, the lower connecting arm is an elastic body.

[0008] Optionally, the power module and the control switch module are disposed on the upper connecting arm, and the prompting module is disposed on the lower connecting arm. Continuous conductors are disposed inside and at the ends of both the upper and lower connecting arms.

[0009] Optionally, the upper connecting arm has a groove, and both the power module and the control switch module are disposed within the groove.

[0010] Optionally, one end of the upper connecting arm is provided with an upper support plate, the upper support plate is fixedly connected to the front sidewall of the thigh strap, the upper support plate extends along the width direction of the thigh strap, the upper support plate has a plurality of adjusting screw holes distributed in sequence, and the upper connecting arm is connected to the upper support plate by screws for adjusting the distance between the upper connecting arm and the lower connecting arm.

[0011] Optionally, a lower support plate is provided at one end of the lower connecting arm, the lower support plate is fixedly connected to the front side wall of the calf strap, and the lower support plate extends along the width direction of the calf strap.

[0012] Optionally, the bottom of the calf strap is further provided with a traction strap, the bottom end of which can be tied or fitted onto the user's foot or shoe.

[0013] Optionally, both the thigh strap and the calf strap are secured with D-rings and Velcro.

[0014] Optionally, the knee hyperextension assistive trainer further includes a lumbar strap and a plurality of second flexible connecting straps connecting the lumbar strap and the thigh strap.

[0015] Optionally, the waist strap is provided with a connecting buckle, and the waist strap is fastened and its length is adjusted by the connecting buckle.

[0016] The beneficial effects of this application are as follows: The knee hyperextension assistive trainer provided by this application is worn on the user's thigh and calf respectively by thigh straps and calf straps. When the user walks or stands, if the knee joint extends beyond the normal physiological range, the upper connecting arm and the lower connecting arm come into contact. The upper connecting arm, the lower connecting arm, the power module, the control switch module, and the prompting module form a closed loop. The prompting module emits sound, vibration, and / or electrical stimulation to remind the user that the knee has hyperextended, allowing the user to actively adjust the knee extension state. Active adjustment can avoid abnormal stress distribution caused by excessive knee extension, reduce wear and tear on articular cartilage, ligaments, and surrounding soft tissues, prevent degenerative diseases such as arthritis, and improve the user's ability to perceive joint position. Through active training, the correct neural control pattern is re-established, improving dynamic stability in the gait cycle. In addition, the elastic bands strengthen the hamstrings and stretch the tense gastrocnemius / soleus muscles, and also assist the user in actively adjusting the knee extension state. After the user has trained for a period of time and the knee extension state has recovered to a certain extent, the elastic bands can be removed, and only active adjustment of the knee extension state training can be performed. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the knee hyperextension assistive training device provided in the embodiments of this application; Figure 2 for Figure 1 Enlarged view of area A in the image.

[0018] In the diagram: 100, thigh strap; 110, first flexible connecting strap; 120, elastic band; 200, calf strap; 300, active training unit; 310, upper connecting arm; 331, groove; 312, upper support plate; 313, adjusting screw hole; 314, screw; 320, lower connecting arm; 321, lower support plate; 330, power module; 340, control switch module; 350, prompting module; 351, buzzer; 352, electrode plate; 400, traction belt; 500, waist strap; 510, connecting buckle; 600, second flexible connecting strap. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] like Figure 1 and Figure 2As shown, this application provides a knee hyperextension assistive training device, comprising: a thigh strap 100, a calf strap 200, and an active training unit 300; wherein, a first flexible connecting band 110 and an elastic band 120 are connected between the thigh strap 100 and the calf strap 200, and the elastic band 120 is located on the back of the leg during use; the active training unit 300 includes an upper connecting arm 310, a lower connecting arm 320, a power module 330, a control switch module 340, and a prompting module 350, the upper connecting arm 310 is located on the front side of the thigh strap 100 and extends obliquely downward, the lower connecting arm 320 is located on the front side of the calf strap 200 and extends obliquely upward, when the ends of the upper connecting arm 310 and the lower connecting arm 320 are in contact, the upper connecting arm 310, the lower connecting arm 320, the power module 330, the control switch module 340, and the prompting module 350 form a closed loop, and the prompting module 350 emits sound, vibration, and / or electrical stimulation reminders.

[0021] Compared with the prior art, the knee hyperextension assistive trainer provided in this application is worn on the user's thigh and calf respectively by thigh strap 100 and calf strap 200. When the user walks or stands, if the knee joint extends beyond the normal physiological range, the upper connecting arm 310 and the lower connecting arm 320 come into contact. The upper connecting arm 310, the lower connecting arm 320, the power module 330, the control switch module 340 and the prompting module 350 form a closed loop. The prompting module 350 emits sound, vibration and / or electrical stimulation to remind the user that the knee has hyperextended, so that the user knows to actively adjust the knee extension state. Active adjustment can avoid abnormal stress distribution caused by excessive knee joint extension, reduce wear and tear on articular cartilage, ligaments and surrounding soft tissues, prevent degenerative diseases such as arthritis, and improve the ability to perceive joint position. Through active training, the correct neural control pattern is re-established, and the dynamic stability in the gait cycle is improved. In addition, the elastic band 120 strengthens the hamstrings and stretches the tense gastrocnemius / soleus muscles. It also assists the user in actively adjusting the knee extension position. After the user has trained for a period of time and the knee extension position has recovered to a certain extent, the elastic band 120 can be removed and only active knee extension adjustment training can be performed.

[0022] It should be noted that there are at least two first flexible connecting straps 110, located on both sides of the thigh strap 100 respectively. Both ends of each first flexible connecting strap 110 are sewn onto the thigh strap 100 and the calf strap 200 respectively. The first flexible connecting strap 110 may also be provided with detachable buckles, allowing for length adjustment. There is at least one elastic band 120, with both ends of each elastic band 120 sewn onto the thigh strap 100 and the calf strap 200 respectively. The elastic band 120 may also be provided with detachable buckles, allowing for length adjustment.

[0023] In one possible implementation, the prompting module 350 includes at least one of a buzzer 351, a vibration motor, and electrode pads 352. Specifically, the buzzer 351 provides immediate and clear prompts via sound signals, allowing the user to react quickly. The vibration motor provides tactile vibrations for privacy, suitable for scenarios requiring silence or assistance for hearing-impaired users. The electrode pads 352 can be attached to the skin surface of the quadriceps muscle for those with quadriceps weakness, or to the skin surface of the hamstring muscle for those with hamstring weakness. Electrical stimulation activates muscle contraction, and the electrode pads 352 release current to relieve pain and indicate knee extension status.

[0024] In one possible implementation, the lower connecting arm 320 is an elastomer. Specifically, the elastomer can be made of rubber or be an elastic structure. The elastic deformation of the lower connecting arm 320 can alleviate the impact force when it comes into contact with the upper connecting arm 310, avoid excessive reaction force affecting the user's gait, and reduce damage to components such as the upper connecting arm 310 and the lower connecting arm 320.

[0025] In one possible implementation, the power module 330 and the control switch module 340 are disposed on the upper connecting arm 310, and the prompting module 350 is disposed on the lower connecting arm 320. Continuous conductors are provided inside and at the ends of both the upper and lower connecting arms 310 and 320. Specifically, the conductors are made of metal and are surrounded by an insulator, with only the ends exposed. The exposed portion of the conductor inside the upper connecting arm 310 is designed as a flat surface, while the exposed portion of the conductor inside the lower connecting arm 320 is designed as an arc-shaped surface, ensuring effective contact between the two conductors and improving the reliability of the active training unit 300.

[0026] In one possible implementation, such as Figure 2 As shown, the upper connecting arm 310 has a groove 331, in which the power module 330 and the control switch module 340 are both disposed. Specifically, the groove 331 extends along the length direction of the upper connecting arm 310, and the power module 330 and the control switch module 340 do not protrude from the groove 331, thus providing protection for the power module 330 and the control switch module 340.

[0027] In one possible implementation, an upper support plate 312 is provided at one end of the upper connecting arm 310. The upper support plate 312 is fixedly connected to the front sidewall of the thigh strap 100. The upper support plate 312 extends along the width direction of the thigh strap 100 and has a plurality of adjusting screw holes 313 arranged sequentially on it. The upper connecting arm 310 and the upper support plate 312 are connected by screws 314 for adjusting the distance between the upper connecting arm 310 and the lower connecting arm 320. Specifically, the upper support plate 312 can be made of plastic, and the thigh strap 100 can be made of woven fabric. It can be fixed to the thigh strap 100 by sewing, heat pressing, gluing, or riveting. The upper support plate 312 plays a supporting role, mainly to improve the stability of the upper connecting arm 310 and reduce its swaying. By adjusting the distance between the upper connecting arm 310 and the lower connecting arm 320, the range of motion of the knee joint can be adjusted for users with similar leg lengths to achieve the purpose of adjusting the intensity of active training; it can also adapt to the leg lengths of different users.

[0028] In one possible implementation, a lower support plate 321 is provided at one end of the lower connecting arm 320. The lower support plate 321 is fixedly connected to the front sidewall of the calf strap 200, and extends along the width direction of the calf strap 200. Specifically, the lower support plate 321 can be made of plastic, and the calf strap 200 can be made of woven fabric. It can be fixed to the calf strap 200 by sewing, heat pressing, gluing, or riveting. The lower support plate 321 plays a supporting role, mainly used to improve the stability of the lower connecting arm 320 and reduce its swaying.

[0029] In one possible implementation, the bottom of the calf strap 200 is further provided with a traction strap 400, the bottom end of which can be tied or fitted onto the user's shoes or feet. Specifically, the traction strap 400 can be made of polyester fiber, nylon, rubber, or rubber + polyester fiber / nylon woven material to improve the stability of the calf strap 200.

[0030] In one possible implementation, both the thigh strap 100 and the calf strap 200 are secured with D-rings and Velcro. Specifically, one end of the thigh strap 100 and the calf strap 200 is secured with a D-ring by sewing, and the other end of the thigh strap 100 and the calf strap 200 is secured with a portion of Velcro by sewing or adhesive. The other portion of the Velcro is also secured with sewing or adhesive at corresponding positions on the thigh strap 100 and the calf strap 200.

[0031] In one possible implementation, the knee hyperextension assistive trainer also includes a lumbar strap 500 and multiple second flexible connecting straps 600 connecting the lumbar strap 500 and the thigh strap 100. Specifically, the lumbar strap 500 can be made of polyester fiber or nylon, the elastic band 120 can be made of rubber or rubber + polyester fiber / nylon woven material, and there are at least two second flexible connecting straps 600, each of which is sewn to the thigh strap 100 and the lumbar strap 500 at both ends; the second flexible connecting straps 600 can also be equipped with detachable buckles, and the length can be adjusted by the buckles. The lumbar strap 500 and the second flexible connecting straps 600 improve the stability of the thigh strap 100.

[0032] In one possible implementation, the waist strap 500 is equipped with a connecting buckle 510, through which the waist strap 500 is secured and its length adjusted. The waist strap 500 and the second flexible connecting strap 600 enhance thigh fixation and reduce strap slippage during training; the traction strap 400 connects the calf strap 200 to the foot, further stabilizing force transmission. This four-level fixation system (waist-thigh-calf-foot) ensures the stability of the device during dynamic training and prevents abnormal compensation.

[0033] In this embodiment, the first flexible connecting strip 110 and the second flexible connecting strip 600 can be made of polyester fiber or nylon, and the elastic strip 120 can be made of rubber or rubber + polyester fiber / nylon woven material.

[0034] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0035] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A knee hyperextension assistive training device, characterized in that, include: Thigh straps (100); The calf strap (200) is connected to the thigh strap (100) by a first flexible connecting strap (110) and an elastic band (120), and the elastic band (120) is located on the back of the leg when in use; The active training unit (300) includes an upper connecting arm (310), a lower connecting arm (320), a power module (330), a control switch module (340), and a prompting module (350). The upper connecting arm (310) is located on the front side of the thigh strap (100) and extends diagonally downward. The lower connecting arm (320) is located on the front side of the calf strap (200) and extends diagonally upward. When the ends of the upper connecting arm (310) and the lower connecting arm (320) are in contact, the upper connecting arm (310), the lower connecting arm (320), the power module (330), the control switch module (340), and the prompting module (350) form a closed loop. The prompting module (350) emits sound, vibration, and / or electrical stimulation reminders.

2. The knee hyperextension assistive training device according to claim 1, characterized in that, The prompting module (350) includes at least one of a buzzer (351), a vibration motor, and an electrode plate (352); And / or, the lower connecting arm (320) is an elastomer.

3. The knee hyperextension assistive training device according to claim 2, characterized in that, The power module (330) and the control switch module (340) are disposed on the upper connecting arm (310), and the prompt module (350) is disposed on the lower connecting arm (320). Continuous conductors are disposed inside and at the ends of the upper connecting arm (310) and the lower connecting arm (320).

4. The knee hyperextension assistive training device according to claim 3, characterized in that, The upper connecting arm (310) has a groove (331), and the power module (330) and the control switch module (340) are both disposed in the groove (331).

5. The knee hyperextension assistive training device according to any one of claims 1-4, characterized in that, One end of the upper connecting arm (310) is provided with an upper support plate (312), the upper support plate (312) is fixedly connected to the front side wall of the thigh strap (100), the upper support plate (312) extends along the width direction of the thigh strap (100), the upper support plate (312) has a plurality of adjusting screw holes (313) distributed in sequence, the upper connecting arm (310) and the upper support plate (312) are connected by screws (314) for adjusting the distance between the upper connecting arm (310) and the lower connecting arm (320).

6. The knee hyperextension assistive training device according to claim 5, characterized in that, A lower support plate (321) is provided at one end of the lower connecting arm (320). The lower support plate (321) is fixedly connected to the front side wall of the calf strap (200). The lower support plate (321) extends along the width direction of the calf strap (200).

7. The knee hyperextension assistive training device according to any one of claims 1-4, characterized in that, The bottom of the calf strap (200) is also provided with a traction strap (400), the bottom end of which can be tied or fitted onto the user's shoes or feet.

8. The knee hyperextension assistive training device according to any one of claims 1-4, characterized in that, Both the thigh strap (100) and the calf strap (200) are secured with D-rings and Velcro.

9. The knee hyperextension assistive training device according to any one of claims 1-4, characterized in that, It also includes a waist strap (500) and a plurality of second flexible connecting straps (600) connecting the waist strap (500) and the thigh strap (100).

10. The knee hyperextension assistive training device according to claim 9, characterized in that, The waist strap (500) is provided with a connecting buckle (510), and the waist strap (500) is tied and its length is adjusted by the connecting buckle (510).

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