ACTUATOR

摘要

PROBLEM TO BE SOLVED: To provide an actuator wherein downsizing and space saving can be accomplished and a large amount of displacement can be obtained at the same time.

SOLUTION: The actuator 10 is so constructed that it includes: a substantially stick-shaped driving rod 14 that has a positive supermagnetostrictor and is placed substantially in parallel with the drive face 12A of a driven body 12; a driving coil 16 that is placed so that it encircles the circumference of the driving rod 14 and is for applying a magnetic field to the driving rod 14 in the axial direction; bias magnets 18 for applying bias magnetic fields to the driving rod 14 in the axial direction; and displacement transmitting members 20 for transmitting displacement in the driving rod 14 in the axial direction to the driven body 12. Both the axial ends of the driving rod 14 are supported by a pair of the displacement transmitting members 20 so that it is sandwiched between them.

COPYRIGHT: (C)2006,JPO&NCIPI