Actuator assembly having dual sensors for detecting the vibration on magnetic disk device
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorNorio Yoshikawa
Life of this patent
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Abstract
According to one embodiment, a magnetic disk device includes a base that includes a bottom wall and side walls standing along a circumference of the bottom wall, a housing that includes a cover facing the bottom wall and closing the base, an actuator assembly that is housed inside the housing and is rotatable around a rotation axis, a head movably supported by the actuator assembly, a control circuit board provided outside of the housing, a first sensor disposed on the control circuit board, and a second sensor disposed inside the housing.
Claims13
A magnetic disk device comprising:
- a housing that comprises a base that comprises a bottom wall and side walls standing along a circumference of the bottom wall, and a cover facing the bottom wall and closing the base;
- an actuator assembly that is housed inside the housing and is rotatable around a rotation axis;
- a head movably supported by the actuator assembly;
- a control circuit board provided outside of the housing;
- a first sensor disposed on the control circuit board;
- a second sensor disposed inside the housing;
- and
- a fixed portion fixed in the housing, wherein
- the fixed portion comprises a protrusion portion that protrudes in a height direction from the bottom wall toward the cover inside the housing,
- the protrusion portion has an upper surface positioned the cover side in the height direction, and
- the second sensor is located on the upper surface.
A magnetic disk device comprising:
- a housing that comprises a base that comprises a bottom wall and side walls standing along a circumference of the bottom wall, and a cover facing the bottom wall and closing the base;
- an actuator assembly that is housed inside the housing and is rotatable around a rotation axis;
- a head movably supported by the actuator assembly;
- a control circuit board provided outside of the housing;
- a first sensor disposed on the control circuit board;
- and
- a second sensor disposed inside the housing, wherein
- the first sensor and the second sensor are arranged on a straight line passing through the rotation axis,
- the first sensor is located in an opposite direction to the second sensor with respect to a center of the actuator assembly in a height direction from the bottom wall toward the cover, and
- the second sensor is located at the cover side in the height direction.
A magnetic disk device comprising:
- a housing that comprises a base that comprises a bottom wall and side walls standing along a circumference of the bottom wall, and a cover facing the bottom wall and closing the base;
- an actuator assembly that is housed inside the housing and is rotatable around a rotation axis;
- a head movably supported in a movement direction by the actuator assembly;
- a control circuit board provided outside of the housing;
- a first sensor disposed on the control circuit board;
- a second sensor disposed inside the housing;
- and
- a fixed portion fixed in the housing, wherein
- the first sensor and the second sensor are located on opposite sides in a height direction from the bottom wall toward the cover,
- the second sensor is located on the fixed portion.
Dependencies are inferred from the claim text.