A head supporting assembly has high flexibility, while applying a necessary and sufficient pressing force to a head, is excellent in shock resistance, and provides a stabilized pressing force not affected by manufacturing variations, and a head driving assembly and a disk drive apparatus use such head supporting assembly. The head supporting assembly is configured to have a base arm provided with a rotation-supporting portion for supporting a head supporting member for rotation in a direction toward and away from a disk surface and a resilient member having one end thereof connected to an end of a supporting arm and the other end connected to the base arm. The rotation-supporting portion of the base arm is provided at such a position that a head mount is allowed to be displaced relative thereto by pressing of the rotation-supporting portion in the pressing direction.

 
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> Composite head arm assembly with thermal control of gram load

> Low stiffness gimbal for disk drive head suspensions

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