US 9,812,632 B2
Actuator device
Markus Laufenberg, Stockach (DE); and Thomas Schiepp, Seitingen-Oberflacht (DE)
Assigned to ETO Magnetic GmbH, Stockach (DE)
Appl. No. 14/418,947
Filed by ETO MAGNETIC GMBH, Stockach (DE)
PCT Filed May 31, 2013, PCT No. PCT/EP2013/061307
§ 371(c)(1), (2) Date Feb. 1, 2015,
PCT Pub. No. WO2014/019738, PCT Pub. Date Feb. 6, 2014.
Claims priority of application No. 10 2012 107 014 (DE), filed on Aug. 1, 2012.
Prior Publication US 2015/0207059 A1, Jul. 23, 2015
Int. Cl. H01L 41/12 (2006.01); H01L 41/06 (2006.01); H02N 2/04 (2006.01)
CPC H01L 41/12 (2013.01) [H01L 41/06 (2013.01); H02N 2/04 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An actuator device comprising an expansion unit containing a magnetically active shape memory alloy material, said expansion unit executes an expansion movement from a starting position along an expansion direction as a reaction to energisation of a coil device and interacting with restoring means for exerting a restoring force counter to the expansion direction on the expansion unit, the restoring means comprises permanent magnet means for acting on a section of the expansion unit in such a manner that a restoring force generated by permanent magnets changes with increasing expansion travel in the expansion direction, wherein the permanent magnet means are formed and/or set up in such a manner that a contraction of the expansion unit into the starting position can take place along the expansion travel when the coil device is not energised.