Array type pneumatic contact lower limb motion function identification and evaluation device

Abstract

The invention relates to the technical field of rehabilitation medicine, and discloses an array type pneumatic contact lower limb movement function identification and evaluation device which comprises a base, an adjustable seat is arranged at the top of the base, a fixed seat is fixedly connected to the top of the base, an auxiliary mechanism is arranged at the top of the fixed seat, an identification mechanism is arranged at the top of the base, and a pneumatic contact is arranged at the top of the identification mechanism. The identification mechanism comprises mounting boxes, the bottoms of the two mounting boxes are fixedly connected to the top of the base, follow-up assemblies are arranged in the mounting boxes, the other ends of the follow-up assemblies are rotationally connected with fixing rings, hook-and-loop fasteners are arranged at the two ends of the fixing rings, and a plurality of air cylinders are fixedly connected to the interiors of the fixing rings. According to the invention, through the design of the array type pneumatic contacts, the detection precision is improved, errors caused by looseness or missing detection of the contacts are avoided, and making of a personalized rehabilitation scheme, such as targeted training for a patient with asymmetrical muscle strength, is supported.

Description

Technical Field

[0001] The present invention relates to the technical field of rehabilitation medicine, and particularly to an array pneumatic contact lower limb motor function identification and evaluation device. Background Art

[0002] A lower limb motor function identification and evaluation device is a medical or rehabilitation device used to detect and quantify the lower limb motor ability. It usually evaluates indicators such as muscle strength, joint range of motion, and balance ability through sensors, motion capture systems, or mechanical analysis. It is widely used in rehabilitation medicine, sports science, and the diagnosis and treatment of neurological diseases to help evaluate the degree of lower limb dysfunction in patients (such as stroke, spinal cord injury, or orthopedic postoperative recovery). This device can provide objective data support for rehabilitation program formulation, treatment effect tracking, and improvement of motor ability.

[0003] In the prior art, traditional lower limb motor function identification and evaluation devices often rely on contacts at fixed positions to collect data. This results in data errors because the contacts may not always fit tightly due to the continuous change of the contour when the leg muscles contract or relax.

[0004] Therefore, in view of the above problems, an array pneumatic contact lower limb motor function identification and evaluation device is proposed to solve the above problems. Summary of the Invention

[0005] To make up for the above deficiencies, the present invention provides an array pneumatic contact lower limb motor function identification and evaluation device, aiming to improve the problem that some devices in the prior art are prone to errors when relying on contacts at fixed positions to collect data.

[0006] To achieve the above object, the present invention adopts the following technical solutions: An array pneumatic contact lower limb motor function identification and evaluation device, including a base, an adjustable seat is arranged on the top of the base, a fixed seat is fixedly connected to the top of the base, an auxiliary mechanism is arranged on the top of the fixed seat, and an identification mechanism is arranged on the top of the base; The identification mechanism includes an installation box, the bottoms of the two installation boxes are fixedly connected to the top of the base, a follower assembly is arranged inside the installation box, the other end of the follower assembly is rotatably connected to a fixing ring, magic tapes are arranged at both ends of the fixing ring, a plurality of air cylinders are fixedly connected inside the fixing ring, a spherical contact is slidably connected inside the air cylinder, the other ends of the plurality of air cylinders are fixedly connected to a transition box, two communication pipes are arranged on each of the adjacent sides of the transition box, a manifold is fixedly connected to the top of the upper transition box, the other end of the manifold is fixedly connected to a gas storage tank, and an evaluator is arranged on the top of the gas storage tank; As a further description of the above technical solution: The follower assembly includes two first limiting rods, both ends of the two limiting rods are fixedly connected to the inside of the mounting box, a longitudinal moving platform is slidably connected to the outer sides of the two limiting rods, and two first springs are sleeved on the outer sides of the limiting rods; As a further description of the above technical solution: A second limiting rod is fixedly connected to the inside of the longitudinal moving platform, a second spring is sleeved on the outer side of the second limiting rod, a transverse moving platform is slidably connected to the outer side of the second limiting rod, and the outer side of the fixed ring is rotatably connected to the other end of the transverse moving platform; As a further description of the above technical solution: The auxiliary mechanism includes two mounting frames, the bottoms of the mounting frames are fixedly connected to the top of the fixed seat, a bottom plate is fixedly connected to the bottom of the mounting frame, one end of the bottom plate is rotatably connected to a rotating plate, two slide rails are fixedly connected to the top of the rotating plate, a sliding platform is slidably connected to the outer sides of the two slide rails, a fixed shaft is fixedly connected to the top of the sliding platform, and a foot pedal is rotatably connected to both ends of the fixed shaft; As a further description of the above technical solution: A rotating frame is arranged on the adjacent sides of the mounting frame, an electric push rod is rotatably connected to the middle of the rotating frame, and the output end of the electric push rod is fixedly connected to the bottom of the sliding platform; As a further description of the above technical solution: A cylinder is arranged on the top of the fixed seat, the output end of the cylinder is rotatably connected to a sliding shaft, and both ends of the sliding shaft are slidably connected to the bottom of the rotating plate; As a further description of the above technical solution: The adjacent ends of the first springs are fixedly connected to the downward sides of the longitudinal moving platform, and the remote ends of the first springs are fixedly connected to the inside of the mounting box; As a further description of the above technical solution: The adjacent ends of the second springs are fixedly connected to the left and right sides of the transverse moving platform, and the remote ends of the second springs are fixedly connected to the inside of the longitudinal moving platform.

[0007] The present invention has the following beneficial effects: 1. In the present invention, through the air circuit system of the air storage tank, the manifold, the transition tank and the air cylinder, the air pressure is continuously adjusted so that the spherical contact always closely fits the leg surface. Even if the leg movement causes contour changes (such as muscle contraction / relaxation), stable contact can be maintained. A plurality of pneumatic contacts are arranged in an array, covering the main muscle groups of the lower limb (such as the quadriceps femoris and the gastrocnemius), collecting pressure distribution data in real time, and combining with the displacement signal of the follow-up component to comprehensively analyze the motor function. Thus, the detection accuracy is improved through the array design of the pneumatic contacts, avoiding errors caused by contact loosening or missed detection, and supporting the formulation of personalized rehabilitation programs, such as targeted training for patients with muscle strength asymmetry.

[0008] 2. In the present invention, the dynamic change of the ground reaction force during human walking is simulated through the thrust of the electric push rod and the elastic responses of Spring 1 and Spring 2, making the evaluation process closer to the real physiological state. And through the combination of Spring 1 and Spring 2, the fixed ring can dynamically adjust the pressure in the vertical and horizontal directions with the movement of the patient's leg, avoiding local compression or strain caused by rigid fixation, thereby improving the detection safety and avoiding secondary injury caused by excessive external force. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a three-dimensional schematic diagram of the array pneumatic contact lower limb motor function identification and evaluation device proposed by the present invention; Figure 2 is a structural plan schematic diagram of the array pneumatic contact lower limb motor function identification and evaluation device proposed by the present invention; Figure 3 is a structural schematic diagram of the auxiliary mechanism of the array pneumatic contact lower limb motor function identification and evaluation device proposed by the present invention; Figure 4 is a structural schematic diagram of the sliding table of the array pneumatic contact lower limb motor function identification and evaluation device proposed by the present invention; Figure 5 is a structural schematic diagram of the sliding shaft of the array pneumatic contact lower limb motor function identification and evaluation device proposed by the present invention; Figure 6 is a structural schematic diagram of the identification mechanism of the array pneumatic contact lower limb motor function identification and evaluation device proposed by the present invention; Figure 7 is a structural schematic diagram of the lateral moving table of the array pneumatic contact lower limb motor function identification and evaluation device proposed by the present invention; Figure 8 is a structural schematic diagram of the fixed ring of the array pneumatic contact lower limb motor function identification and evaluation device proposed by the present invention.

[0010] Legend Explanation: 1. Base; 2. Adjustable seat; 3. Fixed seat; 4. Auxiliary mechanism; 401. Mounting frame; 402. Base plate; 403. Rotating plate; 404. Slide rail; 405. Sliding table; 406. Fixed shaft; 407. Footrest; 408. Rotating frame; 409. Electric push rod; 410. Cylinder; 411. Slide shaft; 5. Identification mechanism; 501. Installation box; 502. First limiting rod; 503. First spring; 504. Longitudinal moving table; 505. Second limiting rod; 506. Second spring; 507. Transverse moving table; 508. Fixed ring; 509. Magic tape; 510. Spherical contact; 511. Air cylinder; 512. Transition box; 513. Connecting pipe; 514. Manifold; 515. Gas storage tank; 516. Evaluator. Detailed implementation mode

[0011] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0012] Refer to Figure 1 And Figure 2 An embodiment provided by the present invention: an array pneumatic contact lower limb movement function identification and evaluation device, including a base 1. The base 1 serves as the support platform of the overall device, providing a stable installation foundation for other functional components to ensure that the device does not shake during the evaluation process. An adjustable seat 2 is arranged on the top of the base 1. By adjusting the height and angle of the adjustable seat 2, it can adapt to the height and sitting posture requirements of the patient (such as the hip flexion angle), so that the patient's lower limbs can stretch naturally and avoid detection errors caused by improper postures. The top of the base 1 is fixedly connected with a fixed seat 3, and an auxiliary mechanism 4 is arranged on the top of the fixed seat 3. The auxiliary mechanism 4 is used to simulate the movement state of the lower limbs, enabling the patient's legs to complete flexion and extension movements, thereby reproducing dynamic scenarios such as walking and providing a real mechanical environment for function evaluation. An identification mechanism 5 is arranged on the top of the base 1; Refer to Figures 6 to 8, the identification institution 5 includes an installation box 501. The bottoms of the two installation boxes 501 are fixedly connected to the top of the base 1. The closed structure of the installation box 501 can protect the internal spring and limiting rod from external interference, while restricting the stroke of the moving platform and preventing overload. A follower assembly is arranged inside the installation box 501. The follower assembly serves as a guiding and buffering unit for the movement of the fixed ring 508, realizing the multi-degree-of-freedom following of the fixed ring 508 under the movement state of the patient's leg. The other end of the follower assembly is rotatably connected to a fixed ring 508. Magic tapes 509 are arranged at both ends of the fixed ring 508. The fixed ring 508 is quickly strapped to the leg through the magic tapes 509 to adapt to different leg circumferences. A plurality of air cylinders 511 are fixedly connected inside the fixed ring 508. A spherical contact 510 is slidably connected inside the air cylinder 511. Under the drive of air pressure, the spherical contact 510 adaptively fits the surface contour of the leg and detects the change of contact pressure in real time. Its array distribution can cover multiple muscle groups in the lower limbs (such as the quadriceps femoris and gastrocnemius), and comprehensively evaluate the movement coordination through multi-point data. The other ends of the plurality of air cylinders 511 are fixedly connected to a transition box 512. Two communication pipes 513 are arranged on the adjacent sides of the transition box 512. A manifold 514 is fixedly connected to the top of the top transition box 512. The other end of the manifold 514 is fixedly connected to an air storage tank 515. A stable air pressure source is provided through the cooperation of the air storage tank 515, the manifold 514, the transition box 512 and the communication pipes 513 to ensure that the pressure in the air cylinders 511 is consistent and avoid the failure of the contact to fit due to air pressure fluctuation. An evaluator 516 is arranged on the top of the air storage tank 515.

[0013] The follower assembly includes two first limiting rods 502. The two ends of the two limiting rods are fixedly connected to the inside of the installation box 501. A longitudinal moving platform 504 is slidably connected to the outside of the two limiting rods. Two first springs 503 are sleeved on the outside of the limiting rods. The adjacent ends of the first springs 503 are fixedly connected to the downward sides of the longitudinal moving platform 504, and the opposite ends of the first springs 503 are fixedly connected to the inside of the installation box 501. A second limiting rod 505 is fixedly connected to the inside of the longitudinal moving platform 504. The first limiting rod 502 and the second limiting rod 505 respectively restrict the strokes of the longitudinal and transverse moving platforms 507, prevent the springs from being overcompressed or the rebound from getting out of control, and ensure that the movement trajectory is controllable. A second spring 506 is sleeved on the outside of the second limiting rod. The adjacent ends of the second spring 506 are fixedly connected to the left and right sides of the transverse moving platform 507, and the opposite ends of the second spring 506 are fixedly connected to the inside of the longitudinal moving platform 504. The impact force during leg movement is buffered through the elastic deformation of the first spring 503 and the second spring 506. Its non-linear stiffness characteristic can simulate the ground reaction force in actual walking, making the evaluation closer to the real physiological state. The pre-tightening forces of the first spring 503 and the second spring 506 are adjustable to adapt to the muscle strength levels of different patients. A transverse moving platform 507 is slidably connected to the outside of the second limiting rod 505. The outside of the fixed ring 508 is rotatably connected to the other end of the transverse moving platform 507.

[0014] Referring to Figures 3 to 5 , the auxiliary mechanism 4 includes two mounting brackets 401. The bottom of the mounting bracket 401 is fixedly connected to the top of the fixed seat 3. A bottom plate 402 is fixedly connected to the bottom of the mounting bracket 401. One end of the bottom plate 402 is rotatably connected to a rotating plate 403. Two slide rails 404 are fixedly connected to the top of the rotating plate 403. A sliding table 405 is slidably connected to the outer sides of the two slide rails 404. A fixed shaft 406 is fixedly connected to the top of the sliding table 405. A foot pedal 407 is rotatably connected to both ends of the fixed shaft 406. The foot pedal 407 is used to provide a foot support surface, and its rotatable connection design allows the natural movement of the ankle joint.

[0015] A rotating frame 408 is arranged on the adjacent side of the mounting bracket 401. An electric push rod 409 is rotatably connected to the middle of the rotating frame 408. The output end of the electric push rod 409 is fixedly connected to the bottom of the sliding table 405. The linear output of the electric push rod 409 drives the sliding table 405 to move along the slide rail 404. The thrust is transmitted to the foot pedal 407 through the fixed shaft 406, driving the leg to complete the flexion-extension cycle. A cylinder 410 is arranged on the top of the fixed seat 3. The output end of the cylinder 410 is rotatably connected to a sliding shaft 411. Both ends of the sliding shaft 411 are slidably connected to the bottom of the rotating plate 403. The cylinder 410 is used to push the rotating plate 403 to rotate around the hinge point of the bottom plate 402, adjusting the initial angle of the foot pedal 407 so that the lower limb of the patient is in the extended position required for detection.

[0016] Working principle: When in use, the patient sits on the adjustable seat 2. By adjusting the height and angle of the seat, then turning on the cylinder 410, the cylinder 410 pushes the sliding shaft 411 to move upward, and the sliding shaft 411 slides at the bottom of the rotating plate 403, thereby driving the rotating plate 403 to rotate along one end of the bottom plate 402, so as to adjust the placement angle of the patient's leg, making the patient's sole steadily placed on the foot pedal 407 and keeping the patient's leg in a straight state. Then, the fixing ring 508 is opened through the magic tape 509, and the fixing ring 508 is sleeved on the patient's leg, so that the detection part of the patient is covered by the fixing ring 508.

[0017] Turn on the electric push rod 409, and the operation of the electric push rod 409 drives the movement of the sliding table 405. Thus, through the transmission of the fixed shaft 406, the acting force is transmitted to the patient's leg, causing the patient's leg to bend, thereby simulating normal movement postures such as walking of the patient. When the patient's leg is bending, the fixed ring 508 rotates with the movement of the leg and drives the transverse moving table 507 to move horizontally on the second limiting rod 505, thereby compressing the second spring 506. At the same time, the force received by the fixed ring 508 in the vertical direction drives the longitudinal moving table 504 to move on the first limiting rod 502 inside the installation box 501, thereby compressing the first spring 503. Thus, through the reverse elastic forces of the first spring 503 and the second spring 506, the force on the patient's leg will not be too large to cause injury.

[0018] And during the bending process of the patient's leg, gas is injected from the gas storage tank 515 into the manifold 514, and the gas enters the air cylinder 511 through the transition box 512, so as to ensure that the spherical contact 510 can always fit the surface of the patient's leg. Then, the evaluation instrument 516 receives the pressure signal of the pneumatic contact and the displacement data of the follow-up component, analyzes the lower limb movement trajectory, muscle strength distribution and joint range of motion through algorithms, and generates a quantitative evaluation report.

[0019] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An array-type pneumatic contact lower limb motor function identification and evaluation device, comprising a base (1), characterized in that: An adjustable seat (2) is arranged on the top of the base (1), a fixed seat (3) is fixedly connected to the top of the base (1), an auxiliary mechanism (4) is arranged on the top of the fixed seat (3), and an identification mechanism (5) is arranged on the top of the base (1); The identification mechanism (5) comprises an installation box (501), the bottoms of the two installation boxes (501) are fixedly connected to the top of the base (1), a follower assembly is arranged inside the installation box (501), the other end of the follower assembly is rotatably connected to a fixing ring (508), both ends of the fixing ring (508) are provided with Velcro (509), a plurality of gas cylinders (511) are fixedly connected inside the fixing ring (508), a spherical contact (510) is slidably connected inside the gas cylinder (511), the other ends of the plurality of gas cylinders (511) are fixedly connected to a transition box (512), two connecting pipes (513) are arranged on adjacent sides of the transition box (512), a collecting pipe (514) is fixedly connected to the top of the transition box (512), the other end of the collecting pipe (514) is fixedly connected to an air storage box (515), and an evaluation instrument (516) is arranged on the top of the air storage box (515).

2. The array-type pneumatic contact lower limb motor function identification and evaluation device according to claim 1 is characterized in that: The follower assembly comprises two limit rods (502), both ends of the two limit rods are fixedly connected to the inside of the installation box (501), the outer sides of the two limit rods are slidably connected to a longitudinal moving platform (504), and the outer sides of the limit rods are sleeved with two springs (503).

3. The array-type pneumatic contact lower limb motor function identification and evaluation device according to claim 2 is characterized in that: The interior of the longitudinal moving platform (504) is fixedly connected to a second limiting rod (505), the outer side of the second limiting rod is sleeved with a second spring (506), the outer side of the second limiting rod (505) is slidably connected to a transverse moving platform (507), and the outer side of the fixed ring (508) is rotatably connected to the other end of the transverse moving platform (507).

4. The array-type pneumatic contact lower limb motor function identification and evaluation device according to claim 1 is characterized in that: The auxiliary mechanism (4) comprises two mounting frames (401), the bottom of the mounting frames (401) being fixedly connected to the top of the fixing seat (3), the bottom of the mounting frames (401) being fixedly connected to a bottom plate (402), one end of the bottom plate (402) being rotatably connected to a rotating plate (403), the top of the rotating plate (403) being fixedly connected to two slide rails (404), the outer sides of the two slide rails (404) being slidably connected to a sliding platform (405), the top of the sliding platform (405) being fixedly connected to a fixed shaft (406), and both ends of the fixed shaft (406) being rotatably connected to foot pedals (407).

5. The array-type pneumatic contact lower limb motor function identification and evaluation device according to claim 4 is characterized in that: A rotating frame (408) is provided on a side adjacent to the mounting frame (401), and an electric push rod (409) is rotatably connected to the middle of the rotating frame (408), and an output end of the electric push rod (409) is fixedly connected to the bottom of the sliding platform (405).

6. The array-type pneumatic contact lower limb motor function identification and evaluation device according to claim 4 is characterized in that: A cylinder (410) is provided on the top of the fixed seat (3); an output end of the cylinder (410) is rotatably connected to a sliding shaft (411); and two ends of the sliding shaft (411) are slidably connected to the bottom of the rotating plate (403).

7. The array-type pneumatic contact lower limb motor function identification and evaluation device according to claim 2 is characterized in that: The proximal end of the spring one (503) is fixedly connected to the downward sides of the longitudinal moving platform (504), and the distal end of the spring one (503) is fixedly connected to the interior of the installation box (501).

8. The array-type pneumatic contact lower limb motor function identification and evaluation device according to claim 3 is characterized in that: The proximal end of the second spring (506) is fixedly connected to the left and right sides of the transverse moving platform (507), and the distal end of the second spring (506) is fixedly connected to the inside of the longitudinal moving platform (504).

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