Disk drive suspension including a load beam with an arc-shaped tab, disk drive, and disk drive suspension manufacturing method

Patent metadata

Field	Value
Publication number	US-11798585-B2
Application number	US-202217958156-A
Country	US
Kind code	B2
Filing date	Sep 30, 2022
Priority date	Oct 1, 2021
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

Abstract

A disk drive suspension of the embodiments includes a load beam, and a flexure including a mounting portion on which a slider is mounted and overlapping with the load beam. The load beam includes a tab further extending than the mounting portion longitudinal direction of the load beam. The tab is shaped in an arc such that a central portion in a lateral direction protrudes with respect to both end portions in the lateral direction, in the load beam. Each of the both end portions includes a flat surface parallel to the lateral direction.

First claim

What is claimed is:

1. A disk drive suspension comprising:
a load beam; and
a flexure including a mounting portion on which a slider is mounted, and overlapping with the load beam,
wherein:
the load beam includes a tab extending further than the mounting portion in a longitudinal direction of the load beam,
the tab is shaped in an arc such that a central portion in a lateral direction protrudes with respect to both end portions in the lateral direction,
the tab has an arc-shaped first surface located on a side of the flexure and an arc-shaped second surface on a side opposite to the first surface, in a thickness direction of the load beam intersecting the longitudinal direction and the lateral direction,
each of the end portions of the tab includes:
a flat surface parallel to the lateral direction and connected to the second surface,
a connecting surface connecting the first surface to the flat surface,
a first edge at which the first surface and the connecting surface are connected, and
a second edge at which the flat surface and the connecting surface are connected, and

a distance from the first edge to the second edge in the thickness direction is less than or equal to a half of a thickness between the first surface and the second surface.

2. A method of manufacturing a disk drive suspension comprising a load beam including a tab, the method comprising:
curving a metal plate such that a central portion in a lateral direction protrudes with respect to both end portions in the lateral direction, in the tab; and
flattening surfaces parallel to the lateral direction, on the end portions,
wherein the metal plate has a first surface formed in an arc shape in the curving, a second surface on a side opposite to the first surface, which is formed in an arc shape in the curving, third surfaces connecting the first surface to the second surface, and edges to which the second surface and the third surfaces are connected, and
wherein the edges are flattened in the flattening.

3. A disk drive comprising:
a first disk;
a second disk spaced apart from and opposed to the first disk;
a first suspension to perform data read from or data write to the first disk;
a second suspension to perform data read from or data write to the second disk; and
a ramp including a gap and being provided on an outer peripheral side of the first disk and the second disk,
wherein:
each of the first suspension and the second suspension comprises a load beam and a flexure including a mounting portion on which a slider is mounted and overlapping with the load beam,
the load beam includes a tab extending further than the mounting portion in a longitudinal direction of the load beam,
the tab is shaped in an arc such that a central portion in a lateral direction protrudes with respect to both end portions in the lateral direction,
the tab has an arc-shaped first surface located on a side of the flexure and an arc-shaped second surface on a side opposite to the first surface, in a thickness direction of the load beam intersecting the longitudinal direction and the lateral direction,
each of the end portions of the tab includes:
a flat surface parallel to the lateral direction and connected to the second surface,
a connecting surface connecting the first surface to the flat surface,
a first edge at which the first surface and the connecting surface are connected, and
a second edge at which the flat surface and the connecting surface are connected, and

a distance from the first edge to the second edge in the thickness direction is less than or equal to a half of a thickness between the first surface and the second surface, and
the first suspension and the second suspension are located in the gap of the ramp in a state in which the flat surfaces of the end portions of the tabs thereof are spaced apart from each other and opposed to each other, when the mounting portion of the flexure of the first suspension and the mounting portion of the flexure of the second suspension retreat from each of the first disk and the second disk.

Assignees

• Nhk Spring Co Ltd

Inventors

• Karasawa Takumi
• Iwamoto Naoki
• Kawao Sei
• Imai Tomoharu

Classifications

• G11B5/4833 Primary

  Structure of the arm assembly, e.g. load beams, flexures, parts of the arm adapted for controlling vertical force on the head (G11B5/484 takes precedence) · CPC title

• G06F3/0676

  Magnetic disk device · CPC title

• G11B5/4826

  Mounting, aligning or attachment of the transducer head relative to the arm assembly, e.g. slider holding members, gimbals, adhesive (G11B5/484 takes precedence; details of head housings or structures G11B5/10, G11B5/127; adjustment relative to the record carrier G11B5/56) · CPC title

• G11B2220/2516

  Hard disks · CPC title