MULTIFUNCTIONAL ACTIVE SHOULDER PROSTHESIS Russian patent published in 2021 - IPC A61F2/56 A61F2/58 A61F2/72 

FIELD: medicine.

SUBSTANCE: invention relates to medicine. Multifunctional active shoulder prosthesis comprises an artificial hand with an electromechanical drive and a wrist mechanism, a forearm rotation mechanism with an electromechanical drive, sleeves and forearm sleeves, an elbow hinge drive with an electromechanical drive, a shoulder rotation mechanism, an artificial brush bioelectric control system and a power supply unit. Prosthesis comprises an electromechanical hand flexion drive and an electromechanical arm rotation mechanism drive, a shoulder pad fixed on the disabled body connected to the sleeve of the arm and providing free movement of the shoulder gusset in the sagittal plane, systems for position control of arm rotation, elbow bending and hand bending, comprising each rotary setting sensor of position control and feedback sensor connected to corresponding actuator. Said sensors of each position control system are connected to control units, in which they are respectively connected to adder. Adder is connected to two pulse converters connected to the pulse-width power amplifier. Power amplifier is connected to the motor-reducer of the actuator, respectively, to rotate the arm, to bend the elbow and to bend the hand. Forearm rotation control system is independent based on the open control principle using a two-channel rotary setting sensor with sensitive elements in form of a set of two contact switches. Brush bioelectric control system is double-channel, where the setting sensors detecting the surface potential of the biceps and triceps on the shoulder stump, each sensor comprises each current collector connected to the preamplifier. Voltage amplifier is connected to the detector connected to the filter. Each channel of sensors of open control, rotation of forearm and bioelectric control are connected to control units of brush and rotation of hand, where they are connected in series to adder. On the sleeve of the arm there are fixed setting sensors of rotation control of arm, flexion of forearm, rotation of forearm and hand bending. In the initial position of the shoulder stump, which is lowered down, the setting arm rotation sensor is fixed horizontally in the sagittal plane, the setting forearm flexion sensor is fixed horizontally in the frontal plane, the setting forearm rotation sensor is fixed vertically in the frontal plane in the shoulder joint area. Master hand flexure sensor is fixed vertically along the shoulder sleeve. Rotors of rotary shoulder rotation sensors, forearm flexion, forearm rotation and hand bending are rigidly connected to the first end of resilient rods placed in flexible shells fixed by one end on the sleeve of the arm. By the second end flexible shells of elastic rods of sensors of rotation of shoulder, forearm flexion and forearm rotation are fixed on shoulder pad. Second end of flexible shell of wrist flexion sensor is fixed on forearm. Second ends of the elastic rods are left free. Sensors of the bioelectric control system of the hand are fixed on the sleeve of the shoulder in zones of maximal signal of muscles of antagonists - biceps and triceps.

EFFECT: invention provides more convenient disability and shorter time for performance of working operations with purposeful self-service actions.

1 cl, 4 dwg