Patent ID: 7451710
Filing Date: 2008-11-18
Classification: H02K

Abstract:
1. An actuator comprising: a linear motor comprising a stationary shaft and a needle movable along a longitudinal direction of the stationary shaft, one of the stationary shaft and the needle having a magnet and the other of the stationary shaft and the needle having a coil; a guide rail extending in parallel to the stationary shaft and interposing the needle inside to guide the same; and support means interposed between the guide rail and the needle and disposed in coaxial relation with an axis of the stationary shaft for movably supporting the needle relative to the guide rail; wherein when a current is supplied to the coil, a magnetic flux acts between the magnet and the coil to generate a driving force by which the needle is moved along the longitudinal direction while being movably supported by the support means and guided by the guide rail.