MULTIFUNCTIONAL ACTIVE ARM ORTHOSIS Russian patent published in 2023 - IPC A61F5/01 A61H1/02 

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, namely to an active arm orthosis. The orthosis contains a hand mechanism with an electromechanical drive, a forearm flexion mechanism with an electromechanical drive, shoulder and forearm sleeves. The orthosis includes an electromechanical hand flexion drive and an electromechanical hand rotation drive, a fixed shoulder strap with the possibility of fixation on the body of a disabled person, connected to the shoulder sleeve and providing free movement of the shoulder girdle in the sagittal plane, systems for positional control of forearm flexion and hand flexion, containing a rotary position control master sensor and a feedback sensor connected to the respective actuator. The sensors of each positional control system are connected to the control units, in which they are connected, respectively, to an adder, which is connected to two pulse converters connected to a pulse-width power amplifier, which is connected to the motor-reducer of the actuator, respectively, forearm flexion and hand flexion. The control systems for hand rotation and hand mechanism are each made independent on the basis of an open-loop control principle using a two-channel rotary master sensor with sensitive elements in the form of a set of two contact switches. Each channel of sensors for open control, hand rotation and hand mechanism is connected to hand rotation control units and hand mechanism, where they are connected in series with an adder connected to two pulse converters connected to a pulse-width power amplifier, which is connected to a motor-reducer of the actuator, respectively, the rotation of the hand and the mechanism of the hand. Set sensors for controlling forearm flexion, wrist flexion and hand mechanism are fixed on the shoulder sleeve. In the initial position of the shoulder sleeve lowered down, the forearm flexion setting sensor and the hand flexion setting sensor are installed horizontally in the sagittal plane. The master sensor of the hand mechanism is fixed horizontally in the area of the swing axis of the shoulder sleeve. The master rotation sensor of the hand is fixed vertically in the frontal plane in the area of the swing axis of the shoulder sleeve. The rotors of rotary sensors for forearm flexion, wrist flexion, hand rotation and hand mechanism are each fixedly connected to the first end of the elastic rods placed in flexible shells, and the flexible shells of the elastic rods of the forearm flexion, wrist flexion and hand mechanism sensors are fixed horizontally in the upper part of the fixed shoulder pad. The second end of the flexible shell of the hand rotation sensor is fixed vertically in the front part of the fixed shoulder pad, leaving the second ends of the elastic rods free.

EFFECT: technical result is to expand the functionality of the device, increase the convenience of a disabled person and reduce the time for performing work operations during targeted self-service activities and during labour activities.

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