Abstract
This work shows the application of a mechanism of four bars synthetized function used in the development of a prosthetic device with an underacted movement, for its application in people with a mutilation level close to the distal dislocation of the wrist. A methodology is exposed for this, from which the procedure for obtaining the trajectory of the four bars mechanism through the function synthesis, which was formulated upon two mathematic models expressed in terms of anthropometric values and ranges of movement for the index and thumb, respectively. As a result of the synthesis of these mechanisms a hand prosthesis prototype was obtained, which counts with seven degrees of liberty separately from each other, which allows to develop punctual and cylindrical holdings, with the purpose of applying this prototype to the subsequent study of grip patterns and interpretation of myoelectric signals that allow to determine an easier to interpret mechanism of control that permits to generate dynamic grips instead of static average grips.
Key words: Computer Aided Design (CAD), Biomechanics, synthesis of mechanisms.
