Design of a Flexible Interphalangeal Joint

In human prostheses, rigid parts commonly use hinges, shafts, ball joints, and bearings to connect. Nevertheless, human anatomy body parts are flexible, and the movement comes from bending flexible parts. In particular, the hand is the member in charge of interacting with the environment. For this reason, when an individual suffers an amputation, his abilities are greatly diminished. Therefore, a prosthesis that restores much of his basic physical abilities is required. This problem can be solved using flexible joints. The human hand has 27 degrees of freedom (DF) or more, of which 9 DF correspond to the interphalangeal joints which can be replaced with the design made in this research since it can be adapted to the different dimensions of each finger.