Magnetic spring device

Abstract

A magnetic spring device includes a permanent magnet, a first yoke and a second yoke, disposed to oppose each other with the permanent magnet interposed therebetween, a movable element, made from a magnetizable body, provided to enable linear movement in an axial direction thereof, in a state wherein a location of an axis is constrained, between the first and second yokes, away from the permanent magnet, where a magnetic path of a magnetic flux that exits from an N-pole of the permanent magnet and returns to a S-pole is formed together with the first and second yokes, and a magnetic flux distribution controlling portion that changes a distribution of an amount of magnetic flux that is provided from the permanent magnet through the first and second yokes to the movable element, and an amount of magnetic flux from the permanent magnet that is not provided to the movable element.

Dependencies are inferred from the claim text.