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Electromagnetic actuator, manufacturing method, and optical scanner using the electromagnetic actuator

  • US 6,943,928 B1
  • Filed: 09/01/2000
  • Issued: 09/13/2005
  • Est. Priority Date: 09/03/1999
  • Status: Expired due to Fees
First Claim
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1. An electromagnetic actuator comprising:

  • a core with a coil wound around said core;

    two stators magnetically coupled to each end of said core;

    a movable element opposed to said stators with two air gaps; and

    supporting means for supporting said movable element to be displacable relative to said two stators,wherein said stators and said movable element are made of the same material, andwherein said two stators and said movable element have a projection and a depression in said two air gaps in such a way that the projection and depression of said stators engage with the projection and depression of said movable element, side surfaces of the projection and depression being parallel to the displacement direction of the movable element and partially overlapping even if there is no electromagnetic force.

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