Robotic thumb mechanism

Abstract

The subject of the application is a robotic thumb mechanism, in particular intended for hand prostheses, comprising a metacarpal phalanx member (3), a proximal phalanx member (4), and a distal phalanx member (5), which are coupled to a linkage system and to a thumb rotation axis system. The thumb rotation axis system comprises a carpometacarpal joint member (2), in which a thumb rotation axis (1) is located, through which a first linkage (8) and a second linkage (9) pass, wherein the first linkage (8) and the second linkage (9) run through separate guide channels (10, 11; 13, 14, 15, 16) formed within the thumb links, tangentially to their inner surface.The first tendon (8) runs through channels (10, 11) in the carpometacarpal joint member (2) and the metacarpal phalanx member (3), and the second tendon (9) runs through channels (13, 14, 15, 16) in the carpometacarpal joint member (2), the metacarpal phalanx member (3), the proximal phalanx member (4) and the distal phalanx member (5), wherein the channels (10, 11) guiding the first tendon (8) and the channels (13, 14, 15, 16) guiding the second tendon (9) are separable from each other.

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