An intelligent bionic prosthetic hand

Abstract

The invention discloses an intelligent bionic prosthetic hand, which includes a palm assembly and a finger assembly. The finger assembly includes at least a thumb assembly and a forefinger assembly. The palm assembly includes a housing and a driving device. A cavity is formed in the housing, and the driving device is arranged in the cavity. Indoors, the palm assembly is also provided with a circuit board electrically connected to the drive device. The drive device is a linear motor, which forms an independent drive connection with each finger in the finger assembly connected to the upper end of the housing; the thumb assembly includes the upper thumb joint and the thumb joint. The lower joint, the upper joint of the thumb and the lower joint of the thumb form a rotating connection through a rotating shaft. The lower end of the upper joint of the thumb is arc-shaped, and there are multiple sawtooth structures on the arc-shaped end surface, corresponding to the arc-shaped end surface of the upper thumb joint There is an elastic jacking mechanism at the end surface of the lower thumb joint, and the jacking mechanism cooperates with the sawtooth structure to manually control the bending angle of the upper thumb joint. The invention realizes the precise grasping and pinching of the prosthetic hand, and is suitable for a wider range of grasping objects.

Description

technical field [0001] The invention relates to the technical field of bionic hands, in particular to an intelligent bionic artificial limb hand. Background technique [0002] The control of the intelligent prosthetic hand mostly adopts the EMG control method, which uses the tiny EMG potential difference signal as the initial signal to control and manipulate various functions of the EMG prosthesis, so as to control the opening and closing of the prosthetic hand. [0003] The existing intelligent prosthetic hand driving method mainly uses a complex gear set transmission structure to realize various actions of the hand. Although it has high control accuracy, it has a high failure rate, heavy weight and high cost. It 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 d...

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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