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Actuator

  • US 20050200207A1
  • Filed: 11/25/2003
  • Published: 09/15/2005
  • Est. Priority Date: 11/26/2002
  • Status: Active Grant
First Claim
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1. An actuator comprising:

  • a casing;

    a stationary member which has a coil member and is mounted in the casing; and

    a movable member which includes a moving element and is supported by the casing;

    wherein the moving element has a shaft and is supported by the casing so as to be moved in an axial direction of the shaft and in a rotational direction having the axial direction of the shaft as its rotational axis;

    wherein electric current is caused to flow through the coil member such that the moving element is moved in the axial direction and in the rotational direction;

    wherein the stationary member includes a first stationary member for imparting to the movable member a force oriented in the axial direction and a second stationary member for imparting to the movable member a force oriented in the rotational direction;

    wherein the coil member includes a first coil member for exciting a first magnetic path passing through the first stationary member and a second coil member for exciting a second magnetic path passing through the second stationary member.

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