Head suspension assembly and disk drive using the same
View Patent ↗A head suspension assembly includes a head, a load beam carrying the head at one end, a resilient member joining the load beam and a carriage, and a pivot bearing provided between the load beam and the carriage and structured so that the load beam is movable in a direction perpendicular to a record medium so that the load beam rocks. The head suspension assembly is structured so that the resilient member has narrow sections for reducing the width of the resilient member to a width smaller than that of both ends of the resilient member that are symmetrical with respect to a centerline of the resilient member. The distal end of the resilient member is joined to the carriage and the resilient member has an opening (hole) in the center thereof. This structure provides a highly shock-resistant and thin head suspension assembly.
1. A head suspension assembly comprising:
a head;
a load beam carrying said head at one end thereof;
a resilient member coupling said load beam and a carriage; and
a pivot bearing provided between said load beam and said carriage and structured so that said load beam is movable in a direction perpendicular to a record medium, wherein said load beam rocks on fulcrums of respective apexes of two pivots provided on at least one of said carriage and said load beam against the resilient member of said load beam joined to said carriage;
wherein said resilient member has a pair of narrow sections for reducing a width of said resilient member to a width smaller than that of both ends of the resilient member that are symmetrical with respect to a centerline of the resilient member.
2. The head suspension assembly of claim 1 , wherein said narrow sections are formed symmetrically with respect to a longitudinal centerline of said load beam.
3. The head suspension assembly of claim 1 , wherein a side of each of said narrow sections other than a joint between said load beam and said carriage is cut into one of a semi-circular shape, a semi-elliptic shape, and a semi-polygonal shape.
4. The head suspension assembly of claim 1 , wherein each of said narrow sections is cut into a semi-rhombic shape like an isosceles triangle.
5. The head suspension assembly of claim 1 , wherein at least two of said narrow sections are provided along respective one of sides parallel to a longitudinal direction of said resilient member, and said narrow sections are formed in positions symmetrical with a centerline of said load beam.
6. The head suspension assembly of claim 1 , wherein said narrow sections are formed into a shape parallel to a centerline of said load beam and asymmetrical with respect to a line perpendicular to a line going through substantially a center of said resilient member.