Patent ID: 7683749
Filing Date: 2010-03-23
Classification: H02K

Abstract:
1. A linear electromagnetic actuator for displacing a movable section including permanent magnets by a thrust force generated by allowing a current to flow through a coil of a fixed section, wherein said movable section has a first yoke for supporting said permanent magnets, said fixed section has a second yoke for supporting said coil facing said permanent magnets while being separated therefrom, a first projection and a second projection are formed on both sides of said first yoke protruding toward said second yoke and extending in a direction of displacement of said movable section, said first projection and said second projection are slightly separated from said second yoke, a first guide member is interposed between said first projection and said second yoke, and a second guide member is interposed between said second projection and said second yoke, wherein each of said first guide member and said second guide member is composed of a plurality of rolling members, and a part of said rolling members are first rolling members composed of magnetic members.