| 摘要 |
A VCM is provided which is used for the positioning drive of a magnetic head of a hard disk drive apparatus, is capable of preventing the attachment of dirt onto back yoke(s), and at the same time has a magnetic circuit, height of which can be lowered. Step parts 14a and 15a are formed on a base 14 and a cover 15, and magnets 3 and 3, which are placed on upper and lower sides of a magnetic action space, are fixed with glue respectively to the inner surface of said step parts 14a and 15a of the base 14 and the cover 15. A lower back yoke 12 and a upper back yoke 11 are placed respectively outside of the step parts 14a and 15a of the base 14 and the cover 15.
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