Mechanism for reciprocating linear motion of a medical device

摘要

A mechanism for reciprocating linear motion of a medical device comprises a body (3), wherein are mounted a rotatable shaft (2) driven with a drive unit (5) and a guide (1) with a slidably platform (4) mounted thereon. The rotatable shaft (2) has a smooth external surface and is connected with a shaft of the drive unit (5) by means of an intermediate mechanism (6) comprising at least two unidirectional clutches (7, 8) mounted on the smooth rotatably shaft (2) in opposite directions. The platform (4) is integrated with a transport mechanism (11) which is mounted on the rotatable shaft (2) and comprises rolling elements (12) so arranged that points of contact of said rolling elements (12) with the smooth surface of the shaft (2) determine a helix.