Magnetic head suspension united support arm with ribbed cut-out

A magnetic head slider support device for use in a magnetic disc apparatus which comprises:

• a magnetic head,
• a head slider having said magnetic head,
• a support arm portion which supports said head slider by causing a gap-formed side of said magnetic head to confront a recording layer-formed surface of a hard disc at one end side thereof, and
• a gimbal spring fixed to a forward end side of said support arm portion so as to attach said head slider thereto, wherein:
• (a) said support arm portion further includes:
• (1) a load beam support portion for supporting said head slider and said gimbal spring,
• (2) a load beam plate spring portion for applying depressing force towards said recording layer-formed surface, to said head slider, and
• (3) a pivotal support arm portion having a pivotal movement center for pivotally moving said magnetic head slider support device about said pivotal movement center, and for pivotally supporting said load beam support portion and said load beam plate spring portion at a rear end of said support arm portion,
• (b) said load beam support portion, said load beam plate spring portion and said pivotal support arm portion are formed from a single piece of material that has a constant thickness, and
• (c) said pivotal support arm portion has:
• (1) a flat face and a side face, said side face having a rib formed by folding a part of said flat face approximately perpendicular to a remainder of said flat face, and
• (2) a cut-out portion formed in the flat face, said cut-out portion having first and second sides, the first side closer to the pivotal movement center than the second side, the first side being smaller than the second side, and said cut-out portion having a further fib.