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WO1994027289A1 - Ensemble bras de montage et suspension monobloc - Google Patents

Ensemble bras de montage et suspension monobloc Download PDF

Info

Publication number
WO1994027289A1
WO1994027289A1 PCT/US1994/005241 US9405241W WO9427289A1 WO 1994027289 A1 WO1994027289 A1 WO 1994027289A1 US 9405241 W US9405241 W US 9405241W WO 9427289 A1 WO9427289 A1 WO 9427289A1
Authority
WO
WIPO (PCT)
Prior art keywords
load beam
unitary
mounting arm
suspension
arm mounting
Prior art date
Application number
PCT/US1994/005241
Other languages
English (en)
Inventor
Richard A. Budde
Original Assignee
Hutchinson Technology Incorporated
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hutchinson Technology Incorporated filed Critical Hutchinson Technology Incorporated
Publication of WO1994027289A1 publication Critical patent/WO1994027289A1/fr

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/4806—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
    • G11B5/4833—Structure of the arm assembly, e.g. load beams, flexures, parts of the arm adapted for controlling vertical force on the head
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/4806—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
    • G11B5/4826—Mounting, aligning or attachment of the transducer head relative to the arm assembly, e.g. slider holding members, gimbals, adhesive

Definitions

  • the present invention relates to an improved unitary mounting arm and suspension assembly for use in dynamic storage devices and rigid disk drives. More specifically, the present invention is directed to a unitary one-piece mounting arm and suspension load beam which are etched out of the same sheet of material.
  • the following advantages are realized from the present improved unitary mounting arm and suspension assembly. The number of components required for the head suspension assembly as a whole is reduced. The number of process steps in fabricating the head suspension assembly is decreased through elimination of the need for welding a separate load beam to a separate mounting arm. The possibility of warpage to the head suspension assembly is prevented by eliminating the previously needed process of welding the load beam and the mounting arm together.
  • the one-piece unitary load beam and actuator arm mounting means may be formed from sheet stainless steel, generally by the process of etching.
  • the present invention provides an improved one-piece unitary load beam and actuator arm mounting means for attachment to the disk drive.
  • Figure 1 illustrates a prior art actuatory assembly using an individual mounting arm and load beam for use in a low profile head disk assembly.
  • Figure 2 illustrates a unitary one-piece load beam and mounting arm in accordance with the present invention with a shortened arm for use in a small form factor drive.
  • FIG. 1 illustrates a prior art swage technology head disk drive assembly 10 with an E- block type actuator 12.
  • the E-block 12 is typically cast or extruded and then the suspension contact area 14 of the projecting arms thereof is machined flat.
  • swage holes 16 are drilled, reamed or machined by electrical discharge.
  • head suspension assemblies (HSA) 18 are swaged to actuator arms 20. Notice that the ends of actuator arms 20 are between disks 26 such that each HSA 18 is sandwiched between its respective contact area 14 and the disk 26. This, along with the swage technology, limits the ability to reduce HDA height.
  • Unitary one-piece head suspension assembly 28 according to the present invention. illustrated in Figure 2, shows a read/write head supporting flexure portion 29 at a distal end of the assembly 28, a mounting arm portion 32 at a proximal end of the assembly 28, and a load beam portion 30 formed in one unitary piece with both the flexure portion 29 and the mounting arm portion 32.
  • the load beam portion 30 is of a shortened length (as compared to that illustrated in Figure 1) in order to be used in a small form factor drive system.
  • Unitary one-piece head suspension assembly 28 eliminates the need for a separate flexure, load beam and mounting arm, which must then be attached to each other before they can be attached to the actuator arm of the drive system (not shown) .
  • head suspension assemblies of the present invention are known as atrous suspension systems of the type described in U. S. Pats. Nos. 3,931,641 and 4,167,765. The disclosures of these two patents are specifically incorporated by reference into the present application to provide a detailed discussion of the structure and use of Watrous suspension systems and of disk drive systems in general.
  • a typical unitary one-piece head suspension assembly according to the present invention has a total overall length of between about 10 to 40 mm, a width at the proximal end of the radius cut-out region of between about 4 to 8 mm, and an inside diameter of the actuator bearing surface of between about 2 to 7 mm.
  • a preferred unitary one-piece head suspension assembly 28, as shown in Figure 2 has a total overall length of about 14 mm, a width at the proximal, end of the radius cut-out region of about 4 mm and an inside diameter of the actuator bearing surface of about 6 mm.
  • a unitary head suspension assembly formed according to these dimensions is ideal for use in small diameter disk drive applications, because of the desirability to keep the section between the actuator bearing surface and the radius cut-out region as short and stiff as possible.
  • the flexure portion may be formed with any conventional type of flexible arms and gimballing support structure
  • the load beam portion may be formed with any suitable types of stiffening rail structures, and with various types of load beam surface features designed to enhance pitch and roll stiffness properties.

Landscapes

  • Supporting Of Heads In Record-Carrier Devices (AREA)

Abstract

Ensemble suspension de tête de disque monobloc perfectionné (28) présentant un bras de montage (32), un fléau de charge (30) et un élément de support souple (29) de tête de lecture/écriture, de préférence produit par attaque d'une seule feuille de matériau, destiné à être utilisé dans des dispositifs à mémoire dynamique et des lecteurs de disque dur. Le nombre de composants requis pour fabriquer ledit ensemble suspension à bras est réduit. En supprimant la nécessité de souder un élement souple à un fléau de charge séparé puis à un bras de montage, on réduit le nombre d'étapes de fabrication dudit ensemble et on élimine le risque de gauchissement. On facilite également les changements de conception en utilisant l'ensemble montage et suspension monobloc.
PCT/US1994/005241 1993-05-12 1994-05-12 Ensemble bras de montage et suspension monobloc WO1994027289A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US6025393A 1993-05-12 1993-05-12
US08/060,253 1993-05-12

Publications (1)

Publication Number Publication Date
WO1994027289A1 true WO1994027289A1 (fr) 1994-11-24

Family

ID=22028335

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1994/005241 WO1994027289A1 (fr) 1993-05-12 1994-05-12 Ensemble bras de montage et suspension monobloc

Country Status (1)

Country Link
WO (1) WO1994027289A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5027240A (en) * 1989-03-27 1991-06-25 Computer & Communications Technology Corp. Disk head assembly load beam
US5198945A (en) * 1990-11-09 1993-03-30 Hutchinson Technology Incorporated Magnetic head suspension

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5027240A (en) * 1989-03-27 1991-06-25 Computer & Communications Technology Corp. Disk head assembly load beam
US5198945A (en) * 1990-11-09 1993-03-30 Hutchinson Technology Incorporated Magnetic head suspension

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HUTCHINSON TECHNOLOGY, "Type 16 Suspension Product Summary", 15 July 1991, pp. 1-7. *

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