| 摘要 |
A coreless electromechanical device having a first and second member which are movable relative to each other, includes: a permanent magnet disposed on the first member; an air-cored electromagnetic coil disposed on the second member; and a coil back yoke which, being disposed on the second member, has a stacked structure, wherein the electromagnetic coil is disposed between the permanent magnet and coil back yoke, the electromagnetic coil has an active coil region, in which a force causing the first member to move relatively in a movement direction is generated in the electromagnetic coil, and coil end regions, and the coil back yoke covers the active coil region, but does not cover the coil end regions.
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