| 摘要 |
PROBLEM TO BE SOLVED: To provide a voice coil motor having high magnetic efficiency by preventing a radially magnetized magnet of an inner magnet array from protruding.SOLUTION: There is provided a voice coil motor 2 using a dual Halbach magnet array, axially magnetized magnets 6A, 6C and 6E of an inner magnet array 6 being a united ring-shaped magnet, and radially magnetized magnets 6B, 6D of the inner magnet array 6 consisting of a plurality of division magnets divided in a circumferential direction. The voice coil motor is provided with fixing means 13 of axially crimping and fixing the radially magnetized magnets and axially magnetized magnets of the inner magnet array. The fixing means 13 consists of a fastener 9 threadably engaged with a flange part 4a and a screw part 4c of an inner cylinder 4 supporting, for example, one end side of the inner magnet array.SELECTED DRAWING: Figure 2 |
