Hand rehabilitation device driven by shape memory alloy wires

Abstract

The invention provides a hand rehabilitation device driven by shape memory alloy wires. The hand rehabilitation device comprises finger sleeves, a palm sleeve, an arm device and fixing rings, whereineach finger sleeve consists of a far-section finger sleeve, a middle-section finger sleeve and a near-section finger sleeve; ten through holes are separately formed in the palm side and the hand backside of the palm sleeve for SMA wires to penetrate through; the arm device is composed of an upper arm and a lower arm; the upper arm is composed of an SMA wire base plate, an SMA wire fixing block and an SMA wire fixing control block; the lower arm is in the same way; the fixing rings fix the front end and the rear end of the arm device and the tail end of the palm sleeve; and the palm sleeve andthe arm device are connected through a hook-and-loop fastener and are reinforced through one fixing ring. The hand rehabilitation device controls the current duty cycle through a single chip microcomputer to control the SMA wires to contract and to drive a hand to contract and stretch, so as to achieve the purpose of rehabilitation.

Description

technical field [0001] The invention relates to the field of finger rehabilitation, in particular to a hand rehabilitation device driven by a shape memory alloy wire. Background technique [0002] Stroke, also known as "stroke", is characterized by high morbidity, disability, mortality and recurrence. According to research statistics, 80% of stroke patients have left upper limb or hand motor dysfunction. For this reason, many rehabilitation devices and auxiliary booster devices have emerged as the times require. [0003] Rehabilitation devices and auxiliary power devices are divided into pneumatic drive, cable drive, SMA drive and EAP drive according to their drive methods. Pneumatic drive is more common, but it is usually more complicated, which will limit the flexibility of fingers and affect the rehabilitation effect; the structure of pull wire drive is generally relatively compact, so it can achieve greater flexion and extension of the hand; SMA drive uses SMA wire to ...

AI Technical Summary

Problems solved by technology

Pneumatic drive is more common, but it is usually more complicated, which will limit the flexibility of fingers and affect the rehabilitation effect; the structure of pull wire drive is generally relatively compact, so it can achieve greater flexion and extension of the hand; SMA drive uses SMA wire to energize and contract to drive The actuator achieves the purpose of manipulating the f

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