Mechanical Design and Development of the Touch Hand II Prosthetic Hand

摘要

The Touch Hand II is a desktop 3D printed prosthetic hand that has been developed to improve on the first design iteration, in order to reach the goal of providing transradial amputees with a low-cost alternative prosthetic hand, in comparison to commercial options. The powered grip strength, closing/opening times, mass, power usage, aesthetics, structural integrity, and cost have all been improved on through this research. The new design is compared to five other low-cost hands and two commercial hands. This comparison shows that the new design has seven characteristics that are similar to or outperform the commercial products. The same can only be said for at most four characteristics of the other low-cost hands. This paper focuses on the mechanical design of the major hand components, although it is also shown how the custom circuit board fits in the palm, and an overview of the programmed control system is described, with possible future additions of amputee feedback and command input.