Intelligent bionic prosthetic hand

Abstract

The invention discloses an intelligent bionic prosthetic hand which comprises a palm assembly and a finger assembly; the finger assembly at least comprises a thumb assembly and an index finger assembly; the palm assembly comprises a shell and a driving device; a cavity is formed in the shell; the driving device is arranged in the cavity; a circuit board electrically connected with the driving device is further arranged in the palm assembly; the driving device is a linear motor and is in independent driving connection with each finger in the finger assembly connected with the upper end of the shell; and the thumb assembly comprises an upper thumb joint and a lower thumb joint, the upper thumb joint and the lower thumb joint are rotationally connected through a rotating shaft, the lower end of the upper thumb joint is in an arc shape, a plurality of sawtooth structures are arranged on the arc-shaped end face of the upper thumb joint, and an elastic jacking mechanism is arranged on the end face, corresponding to the arc-shaped end face of the upper thumb joint, of the lower thumb joint, the jacking mechanism is matched with the sawtooth structure, and the bending angle of the upper joint of the thumb is manually controlled. Accurate grabbing and pinching of the prosthetic hand are achieved, and the hand suitable for grabbing a wider size range of objects.

Description

technical field [0001] The invention relates to the technical field of bionic hands, in particular to an intelligent bionic prosthetic hand. Background technique [0002] The control of intelligent prosthetic hands mostly adopts the myoelectric control method, using the tiny myoelectric potential difference signal as the initial signal for controlling and manipulating various functions of the myoelectric prosthesis, so as to control the opening and closing of the prosthetic hand. [0003] The existing intelligent prosthetic hand drive method mainly uses gears with complex gear set transmission structure to realize various hand movements. Although it has high control accuracy, it also has a high failure rate, heavy weight and high cost. The problem is not conducive to the popularization and application of prosthetic hands. [0004] Chinese patent document CN110731839A discloses a prosthetic hand, which adopts the ring finger, little finger and middle finger to be driven by t...

AI Technical Summary

Problems solved by technology

[0003] The existing intelligent prosthetic hand drive method mainly uses gears with complex gear set transmission structure to realize various hand movements. Although it has high control accuracy, it also has a high failure rate, heavy weight and high cost. The problem is not conducive to the promotion and application of prosthetic hands

[0004] Chinese patent document CN110731839A discloses a prosthetic hand, which adopts the ring finger, little finger and middle finger to be driven by the same motor. Although the number of driving motors is reduced, it is beneficial to reduce the size and weight of the palm, but its circuit board is arranged in the rotating wrist. Increased the size of the rotating wrist, which in turn increases the overall hand height

At the same time, the three fingers share the same drive motor, and the degrees of freedom of each finger are small, which is not convenient for precise grasping of finer objects, and the range of objects suitable for grasping is relatively narrow

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