Examples of a device for guiding and detecting a motion of a target joints and a motion assistance system such motion guiding devices are described. The motion guiding and detecting device comprises a motion generator and a motion transfer and target interfacing unit to transfer the motion generated by the motion generator to the target joint. The system further includes a motion detection and feedback unit that interfaces with the target, and a controller that interfaces with both the feedback unit and the motion generator to control and coordinate the motion of the motion generator and the target joint.

Examples of a device for guiding and detecting a motion of a target joints and a motion assistance system such motion guiding devices are described. The motion guiding and detecting device comprises a motion generator and a motion transfer and target interfacing unit to transfer the motion generated by the motion generator to the target joint. The system further includes a motion detection and feedback unit that interfaces with the target, and a controller that interfaces with both the feedback unit and the motion generator to control and coordinate the motion of the motion generator and the target joint.

The present disclosure is directed to a compact wrist rotator and flexor mechanism for use with a prosthetic hand. The wrist rotator and flexor uses a set of motors to provide a driven mechanism having two degrees of freedom, a wrist rotation and a wrist flexion. The rotator uses a motor with an inverted shaft gearbox combined with a worm gear and a face gear transmission to generate continuous and non-backdrivable rotation. The rotator is integrated into a flexor that uses a lead screw acting as a linear actuator to provide strong non-backdrivable flexion and extension. Due to the arrangement of the drives, the resulting wrist rotator and flexor mechanism has a low and compact profile.

A method for controlling an artificial knee joint comprising an upper part and a lower part pivotally connected to each other, a resistance unit arranged between the upper part and the lower part and having an adjusting device to adjust the damping resistance, a control unit, the adjustment taking place on the basis of sensor data from at least one sensor. During the swing phase at least one of the knee angle (KA), the knee angle velocity (KAV), the knee angle acceleration (KAA), the lower limb angle, the lower limb velocity, the lower limb acceleration, the ankle moment (AM) and the axial force (AF) is sensed, the curve of the parameter is determined and the damping resistance is changed when, after an extreme value of the parameter is reached, the monotonic behavior of the curve of the parameter changes within the swing phase.

A method for controlling an artificial knee joint comprising an upper part and a lower part pivotally connected to each other, a resistance unit arranged between the upper part and the lower part and having an adjusting device to adjust the damping resistance, a control unit, the adjustment taking place on the basis of sensor data from at least one sensor. During the swing phase at least one of the knee angle (KA), the knee angle velocity (KAV), the knee angle acceleration (KAA), the lower limb angle, the lower limb velocity, the lower limb acceleration, the ankle moment (AM) and the axial force (AF) is sensed, the curve of the parameter is determined and the damping resistance is changed when, after an extreme value of the parameter is reached, the monotonic behavior of the curve of the parameter changes within the swing phase.

A knee prosthesis or orthosis includes at least one moveable joint and a torque modulating unit. The torque modulating unit is configured to impose a controllable torque on the at least one moveable joint. The torque modulating unit includes at least one of a motor or brake. The at least one of the motor or brake is coupled to the at least one moveable joint via an electronically-controlled transmission. The electronically-controlled transmission is a two-speed transmission.

A knee prosthesis or orthosis includes at least one moveable joint and a torque modulating unit. The torque modulating unit is configured to impose a controllable torque on the at least one moveable joint. The torque modulating unit includes at least one of a motor or brake. The at least one of the motor or brake is coupled to the at least one moveable joint via an electronically-controlled transmission. The electronically-controlled transmission is a two-speed transmission.

The present invention provides a mechanical prosthetic limb, which relates to the technical field of medical devices. The mechanical prosthetic limb includes a prosthetic limb shank, a fixed component for connecting the prosthetic limb shank with a human body, a power-driven first drive mechanism that is installed on the prosthetic limb shank, and a prosthetic limb sole that is connected to the bottom of the prosthetic limb shank; the fixed component is rotationally connected with the prosthetic limb shank through the first drive mechanism; and the prosthetic limb shank is rotationally connected with the prosthetic limb sole through the first drive mechanism. It can relieve the burdens of the disabled in the automatic advance way, thereby improving convenience.

The present invention provides a mechanical prosthetic limb, which relates to the technical field of medical devices. The mechanical prosthetic limb includes a prosthetic limb shank, a fixed component for connecting the prosthetic limb shank with a human body, a power-driven first drive mechanism that is installed on the prosthetic limb shank, and a prosthetic limb sole that is connected to the bottom of the prosthetic limb shank; the fixed component is rotationally connected with the prosthetic limb shank through the first drive mechanism; and the prosthetic limb shank is rotationally connected with the prosthetic limb sole through the first drive mechanism. It can relieve the burdens of the disabled in the automatic advance way, thereby improving convenience.

An ankle prosthesis is provided that includes a tibial stem with a retractable member configured to be controllably movable between a retracted position and an extended position so that in the extended position the retractable member engages the surface of the bone that defines an intramedullary canal so as to enhance anchoring of the tibial stem within the tibia.