Browse Prior Art Database

Head Suspension Assembly Impact Shock Limiter and Merge Device

IP.com Disclosure Number: IPCOM000116128D
Original Publication Date: 1995-Aug-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Hudick, M: AUTHOR

Abstract

A means is shown in the top half of the Figure to keep a magnetic head (1) in contact with its mating disk (2) when the assembled file (not shown) is subjected to shock loads.

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This is the abbreviated version, containing approximately 63% of the total text.

Head Suspension Assembly Impact Shock Limiter and Merge Device

      A means is shown in the top half of the Figure to keep a
magnetic head (1) in contact with its mating disk (2) when the
assembled file (not shown) is subjected to shock loads.

      This means is provided by utilizing a bent tab (3) which is
etched into and then formed out of one of the load beams (4), in such
a way that it is approximately at 90º  to the load beam (4) from
which it is formed.

      When the head suspension assemblies are fully merged as in the
top view of the Figure, the bent tab (3) just clears the opposite
load beam (5) at a location (6) on load beam (5).  Location (6) is
chosen to lie between the center of gravity (7) and the dimple (8)
load
beam (4) (5) contact point (not shown).  Ideally, this location (6)
may
coincide with the line of maximum deflection on load beam (4) (6).

      Thus, when load beam (5) is subjected to a G-Load Shock which
would cause a clockwise moment about fulcrum line (9), load beam (5)
will rotate until it touches tab (3).  At this moment, the center of
gravity (7) will begin applying a moment to load beam (5) which is
counterclockwise about point (6), thus pushing the head (1) against
the disk (2).  It is assumed that the stiction forces acting on the
air bearing along with the compliance of the soft flexure (not shown)
will maintain the head (1) in contact with the disk (2) until the
countermoment is applied to the head (1).

    ...