25 results about "Prosthetic knee" patented technology

The invention relates to a control method of an artificial limb knee joint. According to the technical scheme, the control method comprises the steps that a heel pressure sensor signal Ph, a sole pressure sensor signal Pf and an inclination angle theta and an angular velocity omega output by a shank inertial measurement unit are obtained in real time; when it is detected that the Pf decline rate exceeds a preset multiple threshold value of the heel pressure decline rate, dynamically calibrating an inclination angle reference theta base and calculating an offset theta cal; dividing six stages of a gait period based on the theta < cal > and the pressure signal, and calculating period duration T; a step speed-damping mapping knowledge base is constructed, and the damping opening degree in the early stage of swing is optimized through iterative learning; finally, the adjusted U value is applied in the early stage of swinging, and fixed damping is kept in other stages. The method is mainly used for improving the walking naturalness and terrain adaptability of the artificial limb at different speeds.

The invention relates to a modular prosthesis cover (1) for covering and / or protecting a prosthesis (10), comprising a knee portion (3) which covers a prosthetic knee joint (30) when the prosthesis cover (1) is applied. The knee portion (3) can be provided on a proximal cover portion (2) and / or a distal cover portion (4) and has proximal and distal end regions (32, 34) for coupling to at least one other cover portion (2, 4). The knee portion (3) also has a lattice structure (30) with polygonal openings (30) between the proximal and distal end regions (32, 34).

A combination of a first assembly for guiding resection of a femur and tibia of a knee joint and a second assembly including femoral and tibial knee components. The combination of the first assembly and the second assembly provides optimal placement and positioning of the femoral and tibial knee components to achieve near-normal knee kinematics and tension. The preparation for and placement of the prosthetic knee components provides medial-pivoting kinematics mimicking that of the natural knee thereby promoting improved outcome for the patient.

The application discloses a single-shaft active and passive mixed driving intelligent artificial knee joint structure with energy recovery function, which comprises a joint rotating module, a gear transmission module, a hydraulic damping module, a rack and a motor. The gear transmission module comprises a primary bevel gear transmission system, a secondary gear transmission system, a synchronous belt wheel transmission assembly and a transmission rack. The motor is fixed on the transmission rack. In the active stage, the motor provides an active driving torque for the knee joint through the gear transmission module and the joint rotating module. In the passive stage, the joint rotating module transmits a passive torque of the knee joint to the motor through the gear transmission module, drives the motor to rotate, so that the motor generates electricity to recover energy, and the hydraulic damping module provides a damping torque to ensure the stability of the knee joint. In various use occasions, the required damping or driving torque can be obtained, the power consumption of the motor can be reduced by recovering the passive torque of the knee joint in the passive stage, and the working endurance of the intelligent artificial limb is improved.

The double-joint continuously variable transmission ratio structure comprises an artificial limb hip joint, a continuously variable transmission power mechanism and an artificial limb knee joint, wherein one end of the continuously variable transmission power mechanism is connected with the artificial limb hip joint, and the other end of the continuously variable transmission power mechanism is connected with the artificial limb knee joint; the continuous variable transmission power mechanism is driven by a power motor to transmit power to the prosthetic hip joint and the prosthetic knee joint at the same time, the prosthetic hip joint is driven to complete hip bending action, the prosthetic knee joint is driven to complete knee bending action, and hip and knee movement coordination is conducted through a speed adjusting motor. Under the action of a single power source, through the structure, the transmission ratio can be changed according to the hip and knee joint movement relation in the gait cycle, the hip and knee cooperation rule in the human body movement process is simulated, and therefore the movement collaboration between artificial leg joints is improved, and the energy conversion efficiency is improved.

The utility model belongs to the technical field of safety prostheses, and particularly relates to a double-hydraulic elastic buckling safety prosthetic knee joint which comprises a supporting body, a joint connector and a hydraulic sleeve, the joint connector is arranged at the lower end of the supporting body, and the hydraulic sleeve is arranged at the side end of the supporting body. Through the arrangement of the bent connecting frame, the supporting shaft, the pressure stabilizing connecting mechanism, the spring and the displacement telescopic column, the bent connecting frame and the knee joint protection shell at the front end rotate through the supporting of the supporting shaft and move under the driving of the hydraulic sleeve; the bending connecting frame pulls the pressure stabilizing connecting mechanism through the positioning column, the displacement telescopic column is promoted to move in the pressure stabilizing connecting mechanism, meanwhile, the spring connected to the side end of the pressure stabilizing connecting mechanism is stretched, and when the knee joint bends, the pressure stabilizing connecting mechanism connected with the bending connecting frame gets close to the other side, so that the knee joint is bent. And the displacement telescopic column slides in the pressure stabilizing connecting mechanism, and meanwhile, the spring rebounds and resets.

A knee implant and its components are disclosed. The femoral component (500) of the knee implant may include a reduced constraint area (505) positioned over a portion of the patellar pathway (560). The reduced constraint area may be configured to provide increased freedom of movement for the patella to move over the reduced constraint area. The increased freedom of movement may be for medial-lateral movement and / or internal-external rotation of the patella. The patellar pathway may include a constraint area (e.g., a trochlear groove 506) positioned below the reduced constraint area. The patella may move within the reduced constraint area during extension (or partial flexion) and within the trochlear groove during flexion. A prosthetic patella (800) having a raised portion (804) is also disclosed. The raised portion may be configured to facilitate engagement of the prosthetic patella with the trochlear groove of the femoral component as the patella transitions from the reduced constraint area to the trochlear groove.

The present invention relates to an electrically controlled variable damping digital cylinder type prosthetic knee joint device, comprising: an electrically controlled variable damping digital cylinder for a knee joint, a fixed mounting block, a prosthetic shank rod, a rotary hinge, a piston rod, an upper piston disc, a cylinder barrel, a one-way valve, a throttle valve, a fixed piston, a spring, a lower piston disc, a force motor, an electrically controlled signal-controller, a one-way valve sleeve, a one-way valve core, a throttle valve sleeve, and a throttle valve core; the electrically controlled signal-controller changes the magnitude of the electromagnetic force generated by the force motor by controlling the magnitude of the current, causing the throttle valve core to move toward the spring side, thereby overcoming and balancing the spring force, and at the same time being able to adjust the position of the flow valve core in the throttle valve sleeve, thereby adjusting the flow rate of air inlet and outlet of the one-way valve, thereby making sitting down and standing up more stable and safe; in addition, gas can enter the cylinder through the one-way valve to replenish the gas in the cylinder so as to facilitate the next sitting down and standing up.

1. Name of the product in this design: Intelligent Knee Joint. 2. Purpose of this design: For use in prosthetic knee replacement. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The application belongs to the technical field of damper, especially relates to an energy storage assembly, an adjustable damper and application of the damper on a prosthetic knee joint. The structure of the energy storage assembly comprises an external cylinder unit for connecting a regulating valve and a one-way valve through a connecting damper rear end cover, a piston plate unit inserted into the external cylinder unit and used for separating an oil storage cavity and an energy storage cavity, a spring unit with a base arranged on the inner side of the external cylinder unit and used for elastically supporting the piston plate unit, and a sealing connection dual-purpose plate unit. When the sealing connection dual-purpose plate unit is arranged on the spring unit with a base, the sealing connection dual-purpose plate unit is used for forming an inflatable energy storage cavity between the spring unit with a base and the piston plate unit. When the sealing connection dual-purpose plate unit is arranged on the side of the energy storage cavity of the piston plate unit, the sealing connection dual-purpose plate unit is connected with a power cylinder and used for forming a driven energy storage cavity.

The invention belongs to the technical field of prosthetic knee joints, and particularly relates to a five-connecting-rod self-adaptive multi-mode prosthetic knee joint based on a magnetorheological effect, which comprises a motor, an output shaft of the motor is connected with an input shaft of a double-output speed reducer, and an output shaft of the double-output speed reducer is connected with a five-connecting-rod mechanism. According to the double-output speed reducer, the self-locking connecting rod is locked and released through the self-holding electromagnet, and the self-locking characteristic of the worm gear and the worm is combined, so that dynamic reconfiguration of the five-connecting-rod mechanism is achieved; the five-connecting-rod mechanism is switched between a four-connecting-rod mechanism and an equivalent single-shaft mechanism, so that the three working states of an active mode, a semi-active mode and a mixed mode are achieved, walking requirements in different environments are met, powerful functions are guaranteed, meanwhile, high reliability and low cost are achieved, and the optimal balance of performance and energy consumption is achieved.

The invention provides a novel servo air pressure prosthetic knee joint, and relates to the field of prosthetic knee joints, the novel servo air pressure prosthetic knee joint is characterized in that an upper air chamber and a lower air chamber are arranged in a cylinder body, and the upper air chamber and the lower air chamber are respectively provided with an upper piston and a lower piston; the first throttling valve and the second throttling valve each comprise a valve body, the end, close to a valve rod of the valve element, of each valve body is provided with a first opening, the side wall of each valve body is provided with a second opening communicated to the inner cavity, and the inner cavity is provided with a valve sleeve which is attached to the inner wall of the valve body and can move left and right. The body of the valve sleeve is provided with a through hole allowing a valve rod of the valve element to penetrate through and a throttling channel communicated with the through hole and the inner cavity, and the valve rod is further sleeved with an adjusting spring. And when the knee joint of the artificial limb is in a zero position, the throttling port at the joint of the throttling channel and the through hole is blocked by the valve rod part of the valve core. The artificial limb knee joint is simple in structure, damping self-adaptive adjustment of the artificial limb knee joint is achieved, and an artificial limb can follow the gait of the healthy side in real time.

The invention relates to a prosthetic device for a lower extremity having a prosthetic knee joint having: an upper part, on which a proximal prosthetic component is arranged; a lower part, which is connected to the upper part so as to be pivotable about a knee joint axis; and a distal prosthetic component, on which a prosthetic foot is formed or can be attached, wherein the distal prosthetic component is mounted so as to be displaceable in the direction of the knee joint axis by means of an axial force acting in the longitudinal extent of the distal prosthetic component and a force transmission device is associated with the knee joint, which force transmission device, during the standing phase, converts a displacement or length change of the distal prosthetic component in the direction of the knee joint axis into a flexion moment about the knee joint axis.

This invention relates to a control method for a prosthetic knee joint, the key technical points of which include: real-time acquisition of heel pressure sensor signals. P h Foot pressure sensor signal P f and the tilt angle output by the lower leg inertial measurement unit i and angular velocity ω; when detected P f When the descent rate exceeds a preset multiple threshold of the heel pressure descent rate, the tilt angle reference is dynamically calibrated. i base And calculate the offset. i cal ;based on i cal The gait cycle is divided into six stages based on the pressure signal, and the cycle duration is calculated. T This invention constructs a gait-damping mapping knowledge base and optimizes the damping opening in the early stage of the swing through iterative learning. Finally, the adjusted U-value is applied in the early stage of the swing, while the damping remains fixed for the remaining stages. This invention primarily aims to improve the naturalness of walking and terrain adaptability of prostheses at different gait speeds.

Various implementations include a prosthetic knee device. The prosthetic knee device includes a thigh portion. The prosthetic knee device includes an upper shank portion. The thigh portion is rotatable relative to the upper shank portion. The prosthetic knee device includes a lower shank portion translationally movable relative to the upper shank portion. Rotation of the thigh portion relative to the upper shank portion causes translational movement of the lower shank portion relative to the upper shank portion.

The application discloses a control method of an active and passive hybrid driving intelligent artificial knee joint, and relates to the field of rehabilitation robots.The method comprises a mode recognition module and a control module.The mode recognition module is used for recognizing the gait phase of a wearer and the terrain information in front of the wearer, and provides decision data for the control module, and is characterized in that the mode recognition module comprises gait detection and terrain detection.The control module selects a corresponding control mode according to the decision data of the mode recognition module and feeds back the current sensing state, and the control mode comprises a passive mode and an active mode.The gait detection and terrain detection algorithms are used to recognize the gait phase of the wearer and the terrain in front of the wearer, different terrains are distinguished, and the active and passive modes are accurately switched, so that the control efficiency of the artificial knee joint is improved, and the energy consumption is reduced.

The present invention provides an active and passive intelligent prosthetic knee joint based on a variable transmission ratio mechanism, which has the following characteristics, including: a frame module; a joint rotation module, which is arranged on the frame module and is used to drive the knee joint to rotate; a gear transmission module, which is arranged on the frame module and is used to drive the joint rotation module; and a hydraulic damping module, which is arranged on the frame module. The hydraulic damping module includes a damping motor, a hydraulic cylinder with a rotary valve at the bottom, a hydraulic rod, a hydraulic rod connecting device, a first incomplete gear and a second incomplete gear. The damping motor drives the second incomplete gear to rotate by driving the first incomplete gear. The second incomplete gear is fixed to the rotary valve by a top screw and is used to control the damping effect of the hydraulic cylinder. A hydraulic rod is connected to the top of the hydraulic cylinder, and a hydraulic rod connecting device is provided on the top of the hydraulic rod. The hydraulic rod is connected to the joint rotation module through the hydraulic rod connecting device, thereby controlling the rotation of the knee joint.

The invention relates to a rigidity-variable dynamic lower limb prosthesis knee joint which comprises a knee joint connecting piece, a knee joint driving part, a rigidity-variable mechanism part, a fixing plate and a rope driving system. The knee joint connecting piece comprises a knee joint standard connecting piece upper part, a knee joint upper connecting piece left part, a knee joint standard connecting piece lower part and a knee joint upper connecting piece right part; the fixing plate comprises a knee joint fixing plate left part and a knee joint fixing plate right part; the knee joint driving part comprises a knee joint large motor, a knee joint small motor, a synchronous belt, a transmission shaft, a knee joint large belt wheel and a knee joint small belt wheel, the variable stiffness mechanism part comprises a rectangular spring, two sliding blocks, a pulley, a guide rail and a spring baffle, and the rope driving system part comprises a spring upward-pressing driving rope, a spring downward-pressing driving rope and a variable stiffness swing rod; according to the invention, double motors are adopted for driving, a lower reduction ratio is adopted, and a synchronous belt is adopted for transmission. The device has the advantages of compact structure, good reverse driving performance, low driving noise and the like.

An arrangement for minimizing the amount of bone initially required to be resected off surfaces of a knee joint prepared using a plurality of user-operable adjustable extension tabs that define a stability gap derived from gap measurements taken in each of extension, mid-flexion and flexion, wherein the stability gap is commensurate with a reference plane derivable from the arrangement wherein a final bone resection with a corresponding bone surface with the reference plane provides for optimum balanced angular movement between the tibia component and the femoral component of the prosthetic knee joint post-surgery.

The invention relates to a tibial tray (20) having a distal surface (D), in which a tibial tray shaft structure (21) extends away from the distal surface (D) in a distal direction (DD), in which the tibial tray structure (21) comprises at least three shaft wall elements (22, 23, 24, 25), the at least three shaft wall elements (22, 23, 24, 25) are arranged relative to each other in such a way that a cross-section of the at least three shaft wall elements (22, 23, 24, 25) in a plane perpendicular to the distal direction (DD) is at least a T-shaped, Y-shaped or X-shaped cross-section, and an area (F) of the cross-section decreases strictly monotonically from the distal surface (D) in the distal direction. The invention further relates to an artificial knee joint.

The present application relates to a kind of prosthetic knee joint anti-collapse device of prosthetic shield, base is respectively arranged in the two sides of prosthetic knee joint, two sliding grooves are set in each base, and the branch of sliding connection is in each sliding groove, and the bottom end of two branches is connected with connecting rod;Folding soft shell's front and rear ends are respectively connected with the top end of four branches;Switching slider is connected with connecting rod, and pushing switching slider can be dragged branch along sliding groove by connecting rod, and the folding soft shell is folded or unfolded;The upper portion of connecting seat is connected with two bases, and its lower portion is connected with prosthetic lower leg.The device is designed folding structure in the recessed position of knee joint between prosthetic shield and receiving cavity, realizes the unfolding and folding of folding soft shell, completes the rapid filling to the recess, avoids the collapse problem at knee joint after lower limb prosthetic wearer sits down, and improves the aesthetic property of lower limb prosthetic wear.

A prosthetic knee replacement apparatus constructed of rubber avoids the disadvantages of metal prosthetics. The knee replacement apparatus includes a base member as a spacer between the upper and lower legs of a patient. A femoral portion extends upwardly from an upper surface of the base member and a tibial portion is coupled to a lower surface of the base member. The knee replacement apparatus may be constructed completely or substantially from a rubber material so as to reduce friction and degeneration. The knee replacement system may be constructed or even 3D printed after the leg bones of the patient are scanned.

The invention discloses a self-adaptive cooperative control method and system for a knee joint of an artificial limb and the artificial limb, and belongs to the field of intelligent rehabilitation equipment control. The method comprises the steps that plantar pressure distribution signals are collected, and preferably knee joint angle signals are also collected; identifying a fine gait sub-phase and a user high-level motion intention based on the signal; according to an identification result, performing joint query in a pre-stored multi-dimensional optimization mapping table to obtain matched driving control quantity and damping control quantity; and in the same control period, the two are synchronously output to the driving unit and the damping unit to cooperatively control the knee joint movement. The corresponding system comprises an information perception fusion module, an intelligent identification decision module and a synchronous driving execution module. Through collaborative decision and synchronous control of driving and damping, dynamic adaptive optimization of motion characteristics of the knee joint of the artificial limb is realized, and gait naturalness and environmental adaptability are improved.

The invention relates to a modular prosthetic cover (1) for covering and / or protecting a prosthesis (10), comprising a knee section (3) which, in a fitted state of the prosthetic cover (1), covers a prosthetic knee joint (30), the knee section (3) can be arranged on a proximal cover section (2) and / or a distal cover section (4) and has proximal and distal end regions (32, 34) for coupling with at least one further cover section (2, 4), wherein the knee section (3) has a grid structure with polygonal openings (30) between the proximal and distal end regions (32, 34).

An arrangement for minimizing the amount of bone initially required to be resected off surfaces of a knee joint prepared using a plurality of user-operable adjustable extension tabs that define a stability gap derived from gap measurements taken in each of extension, mid-flexion and flexion, wherein the stability gap is commensurate with a reference plane derivable from the arrangement wherein a final bone resection with a corresponding bone surface with said reference plane provides for optimum balanced angular movement between the tibia component and the femoral component of the prosthetic knee joint post-surgery.