Step linear actuator.

摘要

A step linear actuator comprises a stationary member comprising a magnetic material, a pair of moving units each being in contact with the stationary member and having a magnetic coupling element for magnetically generating a contact force to the stationary member and an opposing face opposing to the opposing face of the other moving unit through a gap therebetween, and a magnetic driver for generating magnetic forces to control the contact force between each moving unit and the stationary member and to cause a relative movement of the moving unit to each other.