Micro-actuator, head gimbal assembly, and disk drive unit with the same
AssigneeSAE Magnetics (H.K.) Ltd.
InventorsMingGao Yao, Masashi Shiraishi
Life of this patent
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Abstract
A head gimbal assembly includes a slider, a rotatable micro-actuator and a suspension to load the slider and the rotatable micro-actuator. The rotatable micro-actuator horizontally rotates the slider with a central portion of the slider as an axis, which includes a bottom plate to be connected with the suspension, two arm plates symmetrically disposed on the bottom plate with a central portion of the bottom plate as symmetry point and at least one piezoelectric pieces to be connected with the arm plates. Selectively, the amount of the arm plates can be four and four piezoelectric pieces to be connected with the four arm plates, respectively.
Claims24
A head gimbal assembly comprising:
- a slider;
- a rotatable micro-actuator;
- and
- a suspension to load the slider and the rotatable micro-actuator;
- wherein the rotatable micro-actuator horizontally rotates the slider with a central portion of the slider as an axis.
A micro-actuator comprising:
- a bottom plate to be connected with a suspension;
- two arm plates symmetrically disposed on the bottom plate with a central portion of the bottom plate as symmetry point;
- and
- at least one piezoelectric pieces to be connected with the arm plates.
A micro-actuator comprising:
- a bottom plate to be connected with a suspension;
- four arm plates symmetrically disposed on the bottom plate with a central portion of the bottom plate as symmetry point;
- and
- four piezoelectric pieces to be connected with the four arm plates, respectively.
A disk drive unit comprising:
- a head gimbal assembly;
- wherein the head gimbal assembly comprises
- a slider;
- a rotatable micro-actuator;
- and
- a suspension to load the slider and the rotatable micro-actuator;
- wherein the rotatable micro-actuator horizontally rotates the slider with a central portion of the slider as an axis;
- a drive arm to connect with the head gimbal assembly;
- a disk;
- and
- a spindle motor to spin the disk.
Dependencies are inferred from the claim text.