The claimed group of inventions relates to a field of anatomical
engineering, and it relates to a mechanical finger and an
actuator therefor, which may be used in imitators and prostheses of upper limbs. The mechanical finger is a
structural element that performs a gripping function, consists of movable phalanxes, elements for modifying their position relative to each other, and a driving
rope that is connected to a lead nut that is, in turn, intended to interact with an
electromechanical actuator that transmits a force to the mechanical finger. According to the invention, the
rope is fixed on the lead nut and divided into two portions which are arranged symmetrically relative to a
sagittal plane of the
proximal phalanx and laid on the guides. Therewith, cavities are provided in locations of the
rope which are configured to receive loops of the rope, and a length of each of them equals to a travel length of the lead nut. The
actuator is a
power module that is aimed to drive and to control a movement of the mechanical finger. It consists of a motor
reducer having a front shaft with a lead screw mounted thereon, the lead screw is configured to be coupled to the lead nut, and an
encoder that is configured to enable a connection to the contact board of the artificial
wrist, thereby powering the motor
reducer and transmitting pulses. The
actuator and the mechanical finger are individual modules of the artificial
wrist which together form a single module.