Magnetic head suspension with balance mass member
AssigneeSuncall Corporation
InventorsSatoru Takasugi, Yasuo Fujimoto, Kenji Mashimo
Life of this patent
Estimating the term…
Abstract
The present invention provides a magnetic head suspension, wherein a supporting portion such as an arm or base plate includes a pair of supporting pieces extending from its opposite sides in the widthwise direction to a tip-end side of the suspension, and a concave portion which is defined by the pair of supporting pieces and is opened toward the tip-end side of the suspension, there is provided an elastically-deformable elastic plate which is connected to the pair of supporting pieces at a first end and a second end in the widthwise direction of the magnetic head suspension, the member forming the load beam portion is connected to the elastic plate, and the elastic plate forms the load bending portion.
Claims4
A magnetic head suspension comprising:
- a load bending portion generating a load for pressing a magnetic head slider toward a disk surface, wherein the load bending portion comprises an elastically-deformable elastic plate;
- a load beam portion transmitting the load to the magnetic head slider, wherein the load beam portion is connected to the elastic plate, and wherein the load beam portion includes a connected area to which the elastic plate is connected, a tip-end area extending from the connected area toward the tip-end side of the suspension, and a base-end area extending from the connected area toward the base-end side of the suspension;
- a balance mass member connected to the base-end area of the load beam portion;
- a supporting portion supporting the load beam portion through the load bending portion, wherein the supporting portion includes a pair of supporting pieces extending from opposite sides of the supporting portion in the widthwise direction to a tip-end side of the suspension, and a concave portion which is defined by the pair of supporting pieces and is opened toward the tip-end side of the suspension;
- and
- a flexure portion connected to the load beam portion and supporting the magnetic head slider,
- wherein the elastic plate is connected to the pair of supporting pieces at a first end and a second end in the widthwise direction of the magnetic head suspension,
- wherein the elastic plate includes first and second connected areas which are respectively connected to the pair of supporting pieces, and a center area extending between the first and second connected areas, and wherein the center area includes a center connected portion to which the load beam portion is connected, a first extending portion extending between the center connected portion and the first connected area, and a second extending portion extending between the center connected portion and the second connected area, the second extending portion being symmetrical with respect to the first extending portion with a longitudinal center line of the magnetic head suspension as a reference, and
- wherein a length Lg and a length La have a relationship of 0≦Lg≦0.3×La, the length Lg being a length in the longitudinal direction of the magnetic head suspension between a center of gravity of the load beam portion, the flexure portion, and the balance mass member, and a load bending center line of the first and second extending portions along the widthwise direction of the suspension, and the length La being a length in the longitudinal direction of the suspension between the load bending center line, and the center of gravity of a tip-end side portion of the assembly which is closer to the tip-end side of the suspension than the load bending center line.
Dependencies are inferred from the claim text.