229 results about "Knee Joint" patented technology

This invention relates to a multifunctional rehabilitation robot for knee osteoarthritis based on a rope-driven four-bar linkage structure, comprising a shell, a main control drive module, a knee joint wearable module, a knee joint connection and transmission module, and a detachable load-free module. The main control drive module is housed within the backpack shell. The knee joint wearable module includes a femoral wearable unit and a tibial wearable unit, connected via the knee joint connection and transmission module. The knee joint connection and transmission module includes a four-bar linkage structure and a rope drive assembly, which drives the four-bar linkage structure to achieve knee flexion and extension. The detachable load-free module includes a hip support unit and a leg support unit; the hip support unit is connected to the femoral wearable unit, and the leg support unit is connected to the tibial wearable unit. Compared with existing technologies, this invention effectively addresses the rehabilitation needs of patients with knee osteoarthritis and helps patients with varying degrees of varus / valgus aberration correction achieve assisted walking, load-free operation, rehabilitation training, and varus / valgus correction.

This invention provides a variable stiffness actuator, a knee exoskeleton, and a control method for the variable stiffness actuator, belonging to the field of rehabilitation robot technology. The variable stiffness actuator includes a variable stiffness component, which consists of a zero-length frame hinged four-bar linkage, an elastic link assembly, a stiffness adjustment mechanism, and a T-screw assembly. The input and output disks have coaxial rotation centers. The elastic link assembly includes a linear spring and a Bowden wire. The T-screw assembly is used to change the geometric configuration parameters of the four-bar linkage, achieving stepless adjustment of the stiffness range. The knee exoskeleton includes a rotation drive assembly, a thigh assembly, a lower leg assembly, and the variable stiffness actuator. The control method includes establishing a stiffness model, real-time estimation of human-machine interaction torque, compliant control based on gait phase, and adjustment of the stiffness mode. This invention achieves stepless stiffness reconfiguration over a wide range and structural lightweighting, enabling precise compliant control without the need for torque sensors.

This application belongs to the field of wearable robot technology, specifically providing a mechanical load-bearing exoskeleton system based on ground reaction force self-triggering. The exoskeleton system includes an upper body mechanism, a thigh mechanism, a knee joint mechanism, a lower leg mechanism, and a foot mechanism. The knee joint mechanism includes a knee joint support, a locking component, and a transmission assembly. When the foot mechanism touches the ground and the sole of the foot is compressed and deformed by the ground reaction force, the thigh mechanism slides downward relative to the knee joint support. The transmission assembly drives the locking component to slide towards the thigh mechanism and connect with it, thereby locking the knee joint mechanism. The compression deformation of the sole of the foot caused by the ground reaction force is used as a trigger signal to automatically trigger the locking of the knee joint mechanism. The knee joint mechanism can lock at any reasonable angle, so that when the wearer is going up or down slopes, climbing stairs, or bending their knees for cover, the exoskeleton system can still effectively assist the human body in bearing the load by locking the knee joint mechanism.

An exercise machine that enables users to perform both leg press and knee extension exercises efficiently. The exercise machine includes a base platform and an adjustable backrest that supports the user's back to facilitate the leg press exercise. The backrest slides along guide bars, allowing for customizable reclining positions, and its angle can be adjusted for user comfort. A footrest, hinged at the base platform, engages leg muscles during the leg press exercise and is connected to a weight stack for adjustable resistance. The footrest's range of movement can be controlled to prevent excessive rotation. Additionally, a lever pad is positioned to support the user's knees during knee extension exercises, with adjustable resistance through a second weight stack. The lever pad's range of motion can also be regulated for safety. The exercise machine integrates both exercises, promoting full-body muscle engagement and enhancing strength and cardiovascular health.

An orthopaedic prosthesis includes a femoral component (12) comprising a polymeric material. The polymeric material can include a poly(arylene ether) or a poly(oxymethylene). The orthopaedic prosthesis can include a component having an articular layer (58) and a support layer (60) adjacent the articular layer. The support layer can comprise a reinforcing fiber. The orthopaedic prosthesis can be a knee prosthesis.

A wearable device includes a first structure having a first band and a processor mounted on the first band, and a second structure having a second band configured to wrap around a knee and at least one sensor mounted on the second band and configured to measure vibration within the knee. The processor is programmed to make a determination whether the knee is within a range that indicates Osteoarthritis based on the vibration sensed by the at least one sensor, and to output the result to an external device.

The application discloses a flexible variable stiffness knee joint rehabilitation exoskeleton and a motion control method thereof. The flexible variable stiffness knee joint rehabilitation exoskeleton comprises a back fixing assembly, a thigh fixing assembly and a shank fixing assembly. The thigh fixing assembly and the shank fixing assembly are hingedly connected through a knee joint shaft group and are provided with a pose detection assembly at the hinge connection. An output wheel and an input wheel are connected through a Bowden cable group. The back fixing assembly is respectively provided with a controller, a driving mechanism, a nonlinear variable stiffness mechanism and an energy recovery mechanism. The device uses magnetic repulsion between a permanent magnet and a power coil to construct a nonlinear stiffness adjusting mechanism. The actuator is fixed on the human back through a bandage. The Bowden cable is used to realize remote transmission of the torque to the knee joint, thereby effectively reducing the load bearing burden of the lower limbs. In the swing phase of the gait cycle, the system uses the principle of permanent magnet cutting magnetic induction lines to realize energy feedback, thereby improving the overall energy efficiency of the assisting process.

The present application relates to the technical field of medical image processing, and provides a knee femur and tibia segmentation method based on region growing, comprising the following steps: S1, acquiring knee medical images; S2, selecting a growth seed point; S3, coarsely segmenting the knee medical images to obtain knee stem data; S4, finely segmenting the knee medical images to obtain knee connection data; S5, fusing the knee stem data and the knee connection data to obtain knee femur and tibia image data with complete contours; S6, coarsely filling the knee femur and tibia image data to obtain knee femur and tibia image data after coarse filling; and S7, iteratively filling holes in the knee femur and tibia image data by using a three-dimensional sliding window, so as to obtain image data that is consistent with the surrounding data in shape, position and completeness and smoothness. The present application solves the problems of slow segmentation speed, unstable segmentation effect, incomplete segmentation and adhesion in preoperative planning of knee replacement surgery.

The present disclosure relates to a femur and patella contact surface, length determination, image processing method, system and X-ray machine, and relates to the technical field of knee X-ray processing. The femur and patella contact surface determination method comprises: acquiring a femur region mask image and a patella region mask image corresponding to a to-be-processed knee X-ray image; determining an overlapping region corresponding to a femur region mask in the femur region mask image and a patella region mask in the patella region mask image; and configuring the overlapping region as a femur and patella contact surface in the to-be-processed knee X-ray image. The embodiment of the present disclosure can realize knee X-ray image processing.

This invention discloses a cobalt-chromium-molybdenum knee joint prosthesis with a nano-TiN coating and its preparation method. The prosthesis includes a cobalt-chromium-molybdenum alloy knee joint prosthesis substrate, the surface of which is coated with a nano-TiN coating. The nano-TiN coating is doped with Cu element at a doping amount of 1.0-1.5 at.%. The nano-TiN coating has a Vickers hardness of 3400 HV, a surface roughness Ra≤0.05μm after polishing, and a friction coefficient of 0.23. The nano-TiN coating of this invention has a hardness of 3400 HV, which is much higher than that of traditional TiN and TiNbN coatings. After mirror polishing, the coefficient of friction is as low as 0.23, significantly reducing the wear rate and the release of metal ions, thus increasing the service life of the prosthesis by 30%. At the same time, the coating completely covers the cobalt-chromium-molybdenum alloy knee joint prosthesis substrate, effectively blocking the release of Co and Cr metal ions, eliminating postoperative metal allergic reactions, and making it suitable for patients with allergies. Moreover, the 1.0-1.5 at.% Cu doping makes the coating antibacterial rate ≥95%, reducing the postoperative infection rate to below 0.7%, which is far lower than the 2.3% of traditional TiN coatings.

The utility model discloses a kind of flat knitting knitted cold and hot knee-pads in the technical field of knee-pads.The knee-pads include knee-pads cover, first cold compress and second cold compress are built-in in knee-pads cover;First cold compress is set in the position of the front surface corresponding to knee-cap of knee-pads cover;Second cold compress is set two, respectively set in the position corresponding to knee joint two sides of knee-pads cover;First cold compress includes center compress, extension compress and connecting component, multiple extension compresses are arranged along the circumference of center compress, multiple extension compresses are used to extend and cover knee periphery area, and connecting component is detachably connected between center compress and extension compress.The utility model has the advantages that coverage range can be flexibly adjusted according to individual knee form, ensure that key pain area is fully covered, and cold compress curative effect is improved.

The utility model discloses a kind of knee joint and ankle joint robot of linear drive, belong to the technical field of robot, including thigh component, lower leg component and foot component, thigh component, lower leg component and foot component are sequentially hinged to be connected, hinged and set on thigh component knee joint linear drive device and knee joint three connecting rods, the end of knee joint linear drive device away from thigh component is hinged with knee joint three connecting rods, hinged and set on lower leg component knee joint two connecting rods, the end of knee joint two connecting rods away from lower leg component is hinged with knee joint three connecting rods.The utility model can realize linear drive type joint, to improve joint movement efficiency, response speed is fast, driving force is big, movement is accurate, can preferably satisfy robot under various scenes High load and frequent movement and accurate control, because its simple structure, greatly improve the heat dissipation, reduce failure rate, provide a new driving mode for the development of robot.

The utility model discloses a kind of knee joint walking aid bionic elastic device, thigh support plate, shank support plate, support frame movably set on shank support plate, first spring, the sliding seat movably set on the shank support plate and the second spring, the sliding seat is rotatably connected to the thigh support plate with elastic force exerted to support frame.Excellent knee joint walking aid bionic elastic device of the utility model, using the elastic supporting force of spring by slider technology makes thigh support plate extend upwards, after wearing human lower limbs, thigh is pushed up with elastic force, when user walks, feel that knee joint is in the supporting state of elastic force, can improve the use effect of knee joint walking aid.

According to one example, a bearing component for a knee arthroplasty is disclosed. The bearing component can optionally comprise any one or combination of: a medial compartment having an medial articular surface with a medial articular track and having a first thickness as measured at the medial articular track between the medial articular surface a medial distal surface; and a lateral compartment having a lateral articular surface with a lateral articular track and having a second thickness as measured at the lateral articular track between the lateral articular surface a lateral distal surface; wherein the medial articular surface at the medial articular track and the lateral articular surface at the lateral articular track each have an inclination so as to form an acute angle with respect to a resected proximal surface of a tibia.

To provide a genu recurvatum knee brace that can adjust the extension limit angle of the knee. [Solution] The knee band 70 includes a knee posterior pad 71 that presses against the posterior part of the knee joint, an upper posterior band 74 with one end fixed above the one connecting portion 21a, an upper posterior band 75 with one end fixed above the other connecting portion 21b, a lower posterior band 76 with one end fixed below the one connecting portion 21a, and an lower posterior band 77 with one end fixed below the other connecting portion 21b. A tightening mechanism 80 is provided that allows the pressing force applied to the posterior part of the knee joint by the knee posterior pad 71 to be increased by pulling the other end of the upper posterior band 74, the other end of the upper posterior band 75, the other end of the lower posterior band 76, and the other end of the lower posterior band 77.

An implant type or a process of implant fixation is automatically identified by processing surgical plan information. Further, bone mineral density information associated with a patient is determined by processing at least one image. The determined bone mineral density information and patient information representing at least demographics associated with the patient are processed, and a selection of a plurality of patients that previously underwent arthroplasty is made. Outcome information representing results of arthroplasty procedures is processed and a threshold is established representing a biomechanical tolerance. The bone mineral density information is processed to be determined associated with the patient is determined to be above or below the threshold.

This invention discloses a wearable assistive device for sitting and walking, belonging to the field of wearable lower limb assistive walking devices. The main body of the device consists of a segmented rigid support frame, a lower limb movable foot skeleton, elastic assistive components, and wearable fixing components. It integrates core components such as a pressure-distributing multi-functional waist belt for the abdomen, shoulder auxiliary pressure-distributing straps, multi-point detachable buckles, telescopic springs, elastic ropes, spring external protective indwelling hoses, thigh ring fixation brackets, calf ring fixation brackets, knee joint locking devices, and a rubber soft sole for easy removal. This invention abandons the traditional method of directly binding the limbs with elastic components, and adopts a structure that combines segmented rigid support with composite elastic assistance. The elastic tension is transmitted through the frame, avoiding leg compression and blood circulation obstruction. At the same time, the knee joint locking device locks the frame angle to achieve stable support for sitting posture, eliminating the need for a rear rigid carbon steel component. The shoulder, back, and waist pressure-distributing design reduces the load on the waist, the spring external protective hose prevents injury and snagging, and the upper and lower ring brackets provide directional limitation for the elastic components. The invention is a purely mechanical structure with no electronic control components. It is easy to wear and highly adaptable to different body types. It can simultaneously meet the dual needs of sitting rest and standing walking assistance, solving the problems of discomfort from pressure, cumbersome sitting support, disordered assistance, and easy strain on the waist in existing products. It is suitable for the elderly, people undergoing lower limb rehabilitation, and daily long-distance walking assistance scenarios.

This invention discloses a knee joint range of motion trainer combining angle sensing and biofeedback, belonging to the field of rehabilitation assistive device technology. The trainer includes a hinged support frame and a lower leg frame. The support frame consists of a base and a nested thigh frame, with height adjustable via threaded pins and positioning holes. The lower leg frame includes a telescopic frame and a swing frame to accommodate different lower leg lengths. The telescopic frame is equipped with a pedal and a fixing strap for securing the lower leg. The hinge axis features an angle slot, a limiting pin, and a linkage structure of an active rod, a driven rod, and a slider. An angle sensor is installed at the left end of the hinge axis and electrically connected to an embedded calculation and control module. A detachable electric push rod is also provided. This invention allows for flexible switching of training modes, precise monitoring of knee joint range of motion angle and speed, and provides tactile feedback to indicate when the angle has reached the target, adapting to different rehabilitation stages and patient body types.

A method for planning a surgery to a knee joint includes recording a target HKA for a patient and, based on an evaluation of wear of the knee joint, setting an initial resection plan including setting planned femoral resections and setting at least one planned tibial resection. The method includes determining a planned HKA of the patient based on the initial resection plan. The planned HKA is a function of a femoral coronal alignment provided by the planned femoral resections and a tibial coronal alignment of the patient provided by the planned at least one tibial resection. The method further includes selectively adjusting the initial resection plan based on the target HKA and the planned HKA by adjusting the planned tibial coronal alignment and / or the planned femoral coronal alignment to provide an adjusted resection plan with an adjusted planned HKA that is within a threshold of the target HKA.

A system for balancing a knee of a patient includes a force measurement device configured to measure forces between a femoral bone and a tibia bone as a force is applied to the knee and a computing system configured to determine a separation distance between a point or region associated with the femur and a point or region associated with tibia based on force information from the force measurement device. The force measurement device may include at least one paddle configured for placement between the femur and tibia and including at least one force sensing element for sensing forces associated with the femur or tibia. The computing system may be configured to normalize a measured force and identify the separation distance based on the normalized force, wherein the identified separation distance is substantially the same over a range of forces measured by the force measurement device.

This utility model relates to an improved patellar movement measuring instrument, belonging to the field of measuring instruments. It includes a sliding component and a digital caliper. The reading head of the digital caliper is rotatably connected to the sliding component. A laser positioning device is provided on the reading head of the digital caliper. A limiting structure is provided on the scale body of the digital caliper. The end of the limiting structure away from the scale body is connected to the sliding component. A fixing structure is detachably connected to the side of the sliding component away from the digital caliper. This utility model fixes the knee joint through the fixing structure, locates the initial and moved positions of the patella using an infrared measuring instrument, and measures the distance of patellar movement using digital calipers based on the infrared measuring instrument's positioning. This not only improves accuracy but also enhances the convenience of single-person operation.

This invention discloses a roping-driven humanoid robot with centralized drive arrangement and its compliant control method, belonging to the field of humanoid robot technology. The robot includes: an upper limb torso with joint modules centrally arranged in a Y-shape; an upper limb system comprising a series-connected three-degree-of-freedom parallel attitude-adjusting roping-driven humanoid shoulder joint, upper arm, tension-amplified constant-torque constant-stiffness roping-driven humanoid elbow joint, forearm, rotation-decoupling differential roping-driven humanoid wrist joint, and hand; a pelvic-like structure including a 6-RUHU parallel lumbar joint; and a lower limb system comprising a series-connected hip joint, thigh, tension-amplified constant-stiffness roping-driven knee joint, lower leg, differential roping-driven ankle joint, and foot. This invention also discloses a forceless sensing compliant control method based on a motor current and dynamics model. This invention achieves centralized center of gravity, lightweight design, wide-range constant torque output, and safe and flexible interaction, making it suitable for service, collaboration, and other humanoid robot application scenarios.

This application provides a knee femoral prosthesis. The knee femoral prosthesis includes: an anterior portion configured for fitting onto the distal anterior condylar osteotomy surface of the femur; a posterior portion configured for fitting onto the distal posterior condylar osteotomy surface of the femur; a middle portion configured to connect the anterior and posterior portions; and at least two through-holes configured to receive fasteners to secure the knee femoral prosthesis to the distal femur. The at least two through-holes include through-holes whose bore axes intersect or are opposite to each other. Using the knee femoral prosthesis according to this application, a more targeted prosthesis fixation strategy can be provided based on the patient's individual condition, thereby achieving better initial prosthesis stability. Furthermore, this application also relates to a knee prosthesis system incorporating this prosthesis.

This invention relates to a small, four-wheeled inspection robot. The robot comprises a main body assembled from several modular supports, which are connected by quick-release mechanisms. Multiple five-bar linkages are distributed beneath the main body, with drive wheel assemblies mounted at the central hinge point of each linkage. Each five-bar linkage includes two thigh supports and two lower leg supports driven by servo motors, with the thigh and lower leg supports hinged to each other via a knee joint mechanism integrating a composite bearing. Both the main body and the linkage assemblies are made of lightweight, high-strength materials. This invention aims to improve the robot's terrain adaptability, structural reliability, and on-site maintenance efficiency in complex working conditions through the synergistic cooperation of the five-bar linkage wheel-leg topology and the modular quick-release body.

1. Name of the product in this design: Prosthesis (H-50A single-bearing weight-bearing self-locking hydraulic knee joint). 2. Purpose of this design: for use in lower limb prostheses. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

This invention provides a biomimetic lower limb robot prosthesis testing system and method, comprising: a humanoid robot testing body, a load module, a support module, and a data acquisition module; the humanoid robot testing body includes at least human lower limb joints for simulating human lower limb walking; the human lower limb joints include at least one of a knee joint, an ankle joint, and a foot module, and at least a portion of the human lower limb joints can be replaced with a prosthesis test unit, enabling the humanoid robot testing body to drive the prosthesis test unit for walking tests; the load module is disposed on the humanoid robot testing body for providing a target load to the prosthesis test unit; the support module provides a walking path for the humanoid robot testing body to perform walking tests; and the data acquisition module monitors the test parameters of the prosthesis test unit during walking tests. This invention can simulate real-world usage scenarios and achieve accurate testing of multi-dimensional prostheses.

This application provides an adaptive multi-terrain lower limb exoskeleton assistive control method and device. The device includes a backplate, a drive structure, a lower limb structure, sensors, a hip and knee joint transmission system, and a control system. The backplate provides stable support and reduces the device's weight; the lower limb structure enables a natural gait; sensors provide data for precise assistance through real-time monitoring; the hip and knee joint transmission system achieves dynamic torque distribution through pulleys and cams, improving assistance efficiency; the control system includes an electrically connected structure-adaptive allocation layer and a predictive adjustment layer. The predictive adjustment layer incorporates an offline-trained temporal convolutional network (TCN) torque prediction model, and the structure-adaptive allocation layer is electrically connected to the hip and knee joint transmission system. This application enables the lower limb exoskeleton assistive device to better adapt to the human body's natural gait, achieve dynamic torque distribution at the hip and knee joints, improve assistance efficiency and comfort, and enhance adaptability and practicality in complex sports scenarios.

This invention provides a six-legged adsorption robot and its control method for inspecting offshore wind turbine blades. The robot comprises a double-layered body structure and a biomimetic single-leg structure. The double-layered body structure includes an upper and lower body, each equipped with a motion control system and a vacuum adsorption system. The vacuum adsorption system, in conjunction with a three-step gait, achieves alternating adsorption and vacuum breaking. The motion control system coordinates the robot's walking, turning, posture adjustment, and adsorption functions. The biomimetic single-leg structure includes a thigh, a middle leg, and a lower leg, corresponding to the hip, knee, and ankle joints, respectively. Each leg has three rotational degrees of freedom driven by a servo motor. Springs at the upper and lower parts of the lower leg are compressed to provide preload. The lower leg end is connected to a vacuum suction cup via a fisheye bearing, reducing the impact of landing and providing a passive rotational degree of freedom to adapt to stable adsorption on surfaces with varying curvature. This invention features lightweight structure, strong adaptability to surfaces with varying curvature, high control precision, and safety and reliability.

1. The name of the design product: knee joint fixing brace. 2. The use of the design product: the design product is used for supporting and fixing the knee joint. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view. 5. The top view and the bottom view are not often seen or not visible when in use, so the top view and the bottom view are omitted.

Disclosed herein is an angled wall femoral component (500) of a cam-post knee arthroplasty system for posterior cruciate ligament (PCL) replacement total knee arthroplasty (TKA) or revision TKA (rTKA) procedures, such as cruciate ligament (CS), bilateral cruciate ligament (BCS), or posterior stabilization (PS) procedures. The angled wall femoral component may include a femoral box (502) configured to receive a tibial post (110) of a corresponding tibial component (100). The anterior wall (508) of the femoral box is angled anteriorly and may include an anterior cam (561). The anterior wall is angled anteriorly to allow clearance between the anterior side of the tibial post and the anterior wall, while allowing a movable engagement between the tibial post and the anterior cam during knee flexion and extension, to which the femoral component is implanted.