| 摘要 |
The two-stage actuator comprises a fine actuator 2 with an HGA 1, and a coarse actuator 10, which supports the fine actuator 2 secured to it and is rotatably supported. The fine actuator 2 includes an I shape spring 3, a small coil 4 and a yoke 5. The coarse actuator 10 includes a yoke base 8 with permanent magnets 9, facing the small coil 4. The I shape spring 3 has a longitudinally intermediate portion secured to a set set pin member 7 of the coarse actuator 10. A drive force generated in the fine actuator 2 as a result of energizing the small coil 4 with current application thereto, causes flexing of a leaf spring part of the I shape spring 3, thus fine driving the HGA 12 disposed in the fine actuator 2.
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