Magnetic head suspension

A magnetic head suspension comprising a load bending part that generates a load for pressing a magnetic head slider toward a disk surface, a load beam part that transmits the load to the magnetic head slider, a supporting part that supports the load beam part through the load bending portion and that includes a main body region and a pair of support pieces extended from both ends of the main body region in a suspension widthwise direction toward a distal end side of the suspension so as to define a concave part therebetween opened toward the distal end side of the suspension at a center in the suspension width direction, a flexure part that is joined to the load beam part and that supports the magnetic head slider, and an equilibrating weight part that is connected to the load beam part so as to have a proximal end located within the concave part in planar view and that forms, together with the load beam part, the flexure part and the magnetic head slider, an assembly supported by the supporting part through the load bending part, wherein

• (a) there is provided a pair of first elastic plate parts disposed symmetrically with each other with a longitudinal center line of the suspension as a reference and a second elastic plate part disposed symmetrically with the longitudinal center line as a reference, the pair of first elastic plate parts and the second elastic plate part functioning as the load bending part,
• (b) the pair of first elastic plate parts have proximal ends connected to the pair of support pieces and free ends connected to the assembly in a state of having plate surfaces substantially in parallel with the disk surface, the pair of first elastic plate parts being elastically deformed in a bended manner so as to generate a first pressing load that presses the magnetic head slider toward the disk surface against air pressure due to rotation of the disk surface,
• (c) the second elastic plate part is positioned between the pair of first elastic plate parts in the suspension widthwise direction in a state of having its longitudinal direction along the suspension widthwise direction,
• (d) the second elastic plate part includes a pair of support piece connecting regions that are respectively connected to the pair of support pieces, an assembly connecting region that is positioned at a center of the second elastic plate part in its longitudinal direction and that is connected to the assembly, and a pair of extended regions that are extended between the support piece connecting regions and the assembly connecting region, the second elastic plate part generating a second pressing load that presses the magnetic head slider toward the disk surface against air pressure due to rotation of the disk surface as the pair of extended regions are elastically deformed in a twisted manner around a twist axis line along the suspension widthwise direction, and
• (e) the total of the first and second pressing loads functions as the load for pressing the magnetic head slider toward the disk surface.