An underactuated prosthetic hand

Abstract

The invention discloses an under-actuated prosthetic hand which comprises a finger body, a glove, a first flexor tendon, a first extensor tendon and a wrist fixing part. The finger body is connected with the glove, the number of the finger body is identical to the number of fingers missing from a patient, the first flexor tendon and the first extensor tendon are respectively connected with the finger body along the reverse side and the front side of the glove to control flexion and extension of a second interphalangeal joint directly, and the wrist fixing part is connected to the other end of each of the first flexor tendon and the first extensor tendon; a second flexor tendon and a second extensor tendon are further arranged in the finger body used for controlling flexion and extension of a first interphalangeal joint. Multiple degree of freedom of fingers is driven by adopting flexor tendons and extensor tendons of the under-actuated prosthetic hand, envelope adaptive fetching of various objects is completed, and the under-actuated prosthetic hand is simple in structure, small in size, light in weight and attractive and practical.

Description

technical field [0001] The invention belongs to the field of medical equipment, and in particular relates to an underactuated prosthetic hand. Background technique [0002] An ideal prosthetic hand should not only have decorative functions, but also be able to replace human hands in terms of sensory and motor functions, but the prosthetic hands studied in laboratories at home and abroad cannot meet this ideal requirement. Prosthetic hands can be divided into traditional prosthetic hands and modern prosthetic hands. Traditional prosthetic hands are mainly divided into decorative prosthetic hands and cable-controlled prosthetic hands; modern prosthetic hands are representative of myoelectric control prosthetic hands and multi-fingered dexterous hands. [0003] The decorative prosthetic hand is the earliest prosthetic hand. It is designed to make up for the appearance defects of the limbs. [0004] The cable-controlled prosthetic hand, also known as the body-powered prostheti...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide an underactuated prosthetic hand, which uses artificial flexor tendons and extensor tendons to control the degrees of freedom of prosthetic fingers, completes the envelope adaptive grasping of various objects, and solves the problem that patients with clinically missing fingers and palms have no corresponding The Problem With Providing Functional Prosthetics

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