WO1991018390A1 - Architecture de micro disque dur extra plat - Google Patents

Architecture de micro disque dur extra plat Download PDF

Info

Publication number
WO1991018390A1
WO1991018390A1 PCT/US1991/002253 US9102253W WO9118390A1 WO 1991018390 A1 WO1991018390 A1 WO 1991018390A1 US 9102253 W US9102253 W US 9102253W WO 9118390 A1 WO9118390 A1 WO 9118390A1
Authority
WO
WIPO (PCT)
Prior art keywords
base
actuator
disk drive
disk
storage means
Prior art date
Application number
PCT/US1991/002253
Other languages
English (en)
Inventor
Frederick M. Stefansky
Bernard A. Russick
Glade N. Bagnell
Steven R. Speckman
Original Assignee
Conner Peripherals, Inc.
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 Conner Peripherals, Inc. filed Critical Conner Peripherals, Inc.
Priority to JP91508000A priority Critical patent/JPH05507170A/ja
Publication of WO1991018390A1 publication Critical patent/WO1991018390A1/fr

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/12—Disposition of constructional parts in the apparatus, e.g. of power supply, of modules
    • G11B33/121—Disposition of constructional parts in the apparatus, e.g. of power supply, of modules the apparatus comprising a single recording/reproducing device
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
    • G11B25/04—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card
    • G11B25/043—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card using rotating discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/02—Cabinets; Cases; Stands; Disposition of apparatus therein or thereon
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/14—Reducing influence of physical parameters, e.g. temperature change, moisture, dust
    • G11B33/1446—Reducing contamination, e.g. by dust, debris
    • 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
    • G11B5/54—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 with provision for moving the head into or out of its operative position or across tracks
    • G11B5/55—Track change, selection or acquisition by displacement of the head
    • G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7154—Barrels, drums, tuns, vats
    • B29L2031/7156—Pressure vessels

Definitions

  • the present invention relates to disk drives; more particularly, to disk drives which have increased storage capacity and reduced size, weight, and power consumption.
  • Disk drive manufacturers and computer manufacturers usually establish standards for vibration and shock resistance for hard disk drives.
  • criteria imposed on hard disk drives are vibration resistance, compactness, low weight, low power, and ease of manufacture. All of these criteria are usually important to a computer manufacturer selecting a disk drive for use in a specific computer or for a specific type of application.
  • the standards may be more stringent for disk drives intended for use in portable or lap-top computers or other harsh environments where the drive is continually subjected to shock and vibration during transport.
  • Mechanical off-tracking i.e., an unintended physical movement of the heads with respect to the disk(s). Mechanical off-tracking may be caused by movements of various structural components of the disk drive with respect to the disks.
  • Electromagnetic parking devices require electrical power to release the parking device during operation of the disk drive which reduces the life of the batteries in a portable computer.
  • Purely magnetic parking devices park the actuator by the attraction of and, generally, direct contact between a magnetically permeable portion of the actuator and a magnet.
  • the primary drawback of a magnetic latch of this type is that during operation of the disk drive the rotational movement of the actuator is adversely affected by the attraction of the magnetically permeable portion of the actuator and the magnet, thereby creating problems with the track following and seek functions. Further, an extremely large force is required to release the actuator from the magnet.
  • Another problem with prior disk drives is the difficulty in sealing the drive to protect the disks from contaminants.
  • a further object of the invention is to provide a disk drive having a reduced total area, including a length shorter than that of conventional 3.5" form factor disk drives.
  • a further object of the invention is to provide a disk drive having an assembled height of less than eight-tenths of one inch, and preferably 0.75 inch.
  • a further object of the invention is to provide the above objects of the invention in a disk drive having an increased storage capacity and utilizing a single platter storage medium.
  • the total height of the disk drive does not exceed eight-tenths of one inch.
  • a single data storage disk has a diameter of approximately 3.74 inches (a "so called" 3-1/2 inch disk), and a storage capacity of 85Mb.
  • the drive has an overall height of 0.75 inch.
  • the actuator means includes an actuator arm having transducer means mounted thereon and moving in a plane substantially parallel to the plane defined by the disk.
  • the actuator means is responsive to the control signals for positioning the read/write heads at specific locations on the disk.
  • the actuator means rotates about an actuator pivot point which is approximately 2.2 inches from the central point of the disk.
  • the actuator arm may be cast of magnesium.
  • the actuator means further includes a magnet and coil assembly mounted parallel to the base plate for providing a magnetic field to position the actuator arm and transducer assembly.
  • the actuator means includes a magnetically permeable capture member, mounted on a second actuator arm arranged perpendicularly to the first actuator arm, and a magnetic parking means for capturing the magnetic capture member to park the transducer means over a landing zone provided on the disk.
  • a printed circuit board assembly mounted under the base plate.
  • Fig. 2 is a top-level plan view of a disk drive according to the present invention.
  • Fig. 3A is a cross-sectional side view along line 3-3 in Fig. 2;
  • Fig. 3B is an exploded view of the actuator mounting assembly
  • Fig. 4 is a cross-sectional side view along line 4-4 in Fig. 2; and Fig. 5 is an exploded, isometric view of the actuator arm and actuator assembly of a disk drive in accordance with the present invention.
  • Fig. 6 is a cross-sectional view along line 6-6 in Fig. 1.
  • Disk drives according to the present invention will be described herein with reference to Figs. 1-6.
  • the preferred embodiment of the disk drive of the present invention includes a single hard disk with magnetic coating and utilizes Winchester storage technology; however, it is within contemplation of the present invention to utilize various numbers of disks and other types of disks such as optical disks, and other read/write technologies such as lasers.
  • the disk drives of the present invention reflect the continuing trend in the storage technology industry to incorporate a greater amount of data storage into ever- decreasing physical space dimensions, under a maximum of operating temperatures and shock conditions.
  • the disk drives accomplish these objectives by providing a novel arrangement of traditional disk drive components.
  • 8" form factor disk drives were followed by five and one-quarter inch (5-1/4") form factor disk drives.
  • the length of a 5-1/4" form factor disk drive is approximately one-half of the length of an 8" form factor drive.
  • This same size relationship applies to so-called three and one-half inch (3-1/2") form factor drives in relation to 5-1/4" drives--i.e. , a 3-1/2" form factor drive is approximately one-half the size of a 5-1/4" drive.
  • a so-called 3-1/2 inch disk having a diameter of approximately 3.74" (92mm) is utilized to provide a disk drive having a length of 5.15 inches, a width of 4 inches; one embodiment of these disk drive has an assembled height of 0.75 inch, and another embodiment has an assembled height of 0.78 inch.
  • the total weight of the drives is less than one pound.
  • the overall power consumption during the read and write functions is approximately 3.5 watts and power consumption may be as low as 1.5 watts during idle periods.
  • these disk drives are ideal for use in portable, laptop, or other battery-powered computers.
  • the 3/4" height of one of the disk drives of the present invention is approximately one-half of the disk drive height of a conventional 3-1/2" form factor hard disk drive, thereby allowing two of the drives of the present invention to occupy the space formerly occupied by a standard-height 3-1/2" form factor disk drive.
  • a disk drive 10 in accordance with the present invention includes a base 12 and cover 14 comprised of, for example, aluminum.
  • a gasket 16 is provided between base 12 and cover 14 to establish a sealed (or controlled) environment between base 12 and cover 14.
  • the cover 14 is mounted on base 12 by means of socket head screws (not shown) provided through bores 18 in cover 14 to screw into threaded mounting holes 19 to attach the cover 14 to base 12.
  • socket head screws not shown
  • the positioning of bores 18 on the cover 14 and the threaded mounting holes 19 on base 12 are such as to enhance the structural rigidity of the drive 10.
  • disk drive 10 includes actuator assembly 50, spindle motor 20, and printed circuit board (PCB) 15.
  • the PCB 15 contains circuitry for providing control signals necessary for operating the disk drive.
  • the disk drive 10 further includes a disk 22 mounted on spindle motor 20 to provide a means for storing data in the drive.
  • a header assembly 25 comprising a plurality of holes 26 and a corresponding plurality of pins 28 press- fit into the holes 26, transfers control signals from PCB 15 to the controlled environment within base 12 and cover 14. Pins 28 of header assembly 25 plug directly into a connector 27 provided on PCB 15.
  • the structure of base 12 and PCB 15 is such that a minimum amount of height is required to provide a mounting area for the plurality of components utilized in the drive.
  • base 12 is provided with a flat top surface for conveniently mounting the components of the disk drive thereon during the manufacturing process. This type of base significantly increases the speed with which the drives can be manufactured over conventional drives using a base having the so-called "bathtub" design.
  • Base 12 includes recess 13 in which the actuator assembly 50 is mounted.
  • Base 12 also includes a well region 17 for receiving spindle motor 20.
  • PCB 15 mounts on the bottom of base 12 in a configuration such that the circuitry provided on PCB 15 does not extend beyond the total height of side rails C and D of base 12. As discussed more completely below, the circuitry provided on PCB 15 creates control signals which control, for example, the operation of the actuator assembly 50 and spindle motor 20 to allow disk drive 10 to selectably access data stored on disk 22.
  • a unique feature of PCB 15 is the provision of an opening of a shape corresponding to the shape of the well region 17 to allow PCB 15 to mount in close proximity adjacent the bottom portion of the base 12. This feature of the disk drive architecture allows for maximum efficiency in the arrangement of drive components to achieve a minimum total height when using both a PCB and a base plate in the drive design. Essentially, the total height of the disk and the spindle motor defines the total minimum height requirement for the drive.
  • the integration of base 12, PCB 15 and motor 20 thereby functions to provide a drive having a reduced height.
  • Gasket 16 is of a unique structure in disk drives which allows an improved seal to be formed between base 12 and cover 14 to provide the controlled environment therebetween. Gasket 16 will be described with reference to Figs. 1 and 6.
  • Fig. 6 is a partial, cross- sectional view of gasket 16 along line 6-6 of Fig. 1. As detailed in Fig. 6, the gasket cross section comprises walls 1 and 2, and rib 3 in opposed relation to the walls 1 and 2. Walls 1 and 2 form groove 5, sufficient to receive cover 14 and provide a seal when cover 14 is slidably mounted in groove 5.
  • Gasket 16 also includes slats 7 having bores 18a formed therein corresponding to bores 18 in cover plate 14 for allowing the socket head cap screws (not shown) to engage thread mounting holes 19.
  • a trough 11 is formed in base 12 and has substantially the same shape as cover 14 and gasket
  • Rib 3 conforms to a shape substantially the same as trough 11 and rib 3 engages trough 11 in a tongue-in- groove fashion.
  • Gasket 16 is formed of a pliable material , preferably 40 Durometer polyurethane, such that when gasket 16 is sandwiched between cover 14 and base 12, an improved seal is formed between the cover 14 and base 12 to provide a controlled environment for operation of the disk drive.
  • the assembled base 12, cover 14, and gasket 16 provide a controlled environment which is sealed to 1 atm, corresponding to 40,000 feet above and 1,000 feet below sea level.
  • a filter 24 is provided to assist in ensuring a contaminant-free, controlled environment between base 12 and cover 14.
  • Filter 24 is slidably mounted in post 24A and notch 24B formed on the interior of cover 14.
  • the rigid structure of base 12, cover 14, and the mounting of components therein ensure that the actuator assembly 50 positions reading and writing heads 60 about the disk drive 10 in an accurate manner over a variety of operating conditions .
  • Fig. 2 is a top-level diagram showing the layout of the components in the disk drive 10.
  • Fig. 2 serves to further illustrate the novel architecture of disk drive 10 of the instant invention.
  • disk 22 is shown rotatably mounted about axis 21 located at the center of disk 22.
  • Axis 21 is located at a distance of approximately 3.15 inches from end side rail A and approximately 1.698 inches from side rail C of base 12.
  • Disk clamp member 23 secures the disk 22 in place on spindle motor 20.
  • actuator assembly 50 The positioning and operation of actuator assembly 50 is shown in Figs. 2 and 4.
  • the actuator assembly 50 is mounted in recess 13 of base 12 to minimize the height required in the drive architecture.
  • actuator assembly 50 positions transducer means 60a and 60b, mounted on actuator arm assembly 52 (comprising actuator arms 52a and 52b) and support flexures 54a and 54b, to ensure that heads 60a and 60b, one of which is associated with each surface of disk 22, are positioned over individual data tracks lying in the same vertically oriented, cylindrical segment defining the same track on both surfaces of disk 22.
  • Spin motor flex circuit 30 is coupled to the header assembly 25 for providing control signals from the PCB 15 to the spindle motor 20 to rotate the disk 22 in response to control signals from PCB 15.
  • Actuator flex circuit 32 carries electrical signals from header 25 to heads 60a and 60b and actuator assembly 50. Actuator flex circuit 32 is separated into three portions. A first portion carries current to the actuator coil 70. A second portion is a ground plane which separates the first, current-carrying portion from a third, data- carrying portion. The data-carrying portion provides signals to heads 60a and 60b for recording information on disk 22 and carries signals from heads 60a and 60b to the PCB 15 via header assembly 25 when reading data from disk 22.
  • Actuator flex circuit 32 is electrically connected to pins 28 of header assembly 25. One portion of the actuator flex circuit 32 terminates at a point where the actuator flex circuit 32 joins actuator arm assembly 52. However, the second and third portions of the flexure 32 wrap around the shoulder of the actuator arm assembly 52 which surrounds the bearing cartridge 40. Wrapping the second and third portions of the actuator flex circuit 32 around the shoulder of the actuator arm assembly 52 provides access to current-carrying wires on one side of the flex circuit. Additionally, the radius of the curve defined by the actuator flex circuit 32 defines a torque which is exerted by the actuator flex circuit 32 on the actuator arm assembly 52.
  • Actuator assembly 50 includes actuator arm assembly 52, flexures 54a and 54b, and read/write heads 60a and 60b.
  • Actuator arm assembly 52 also includes first and second support arms 52a and 52b which support flexures 54a and 54b on which read/write heads 60a and 60b are mounted. Heads 60a and 60b preferably comprise thin-film transducers having a gap width of approximately 9.0 microns.
  • flexures 54a and 54b are mounted to first and second support arms 52a and 52b, respectively, by means of a stamped metal post for interlocking each flexure 54a, 54b with support arms 52a and 52b, respectively.
  • Actuator arm assembly 52 is mounted on actuator support pin 65 by bearing cartridge 40 and is secured by socket head cap screw 45, as is discussed more fully below with respect to Fig. 3B.
  • a voice coil motor including coil 70 and actuator magnet 66 mounted on an actuator assembly top support plate 55.
  • Top support plate 55 and bottom support plate 53 are formed of a magnetically permeable material to provide returns for the magnetic field generated by magnet 66.
  • Magnet 66 and actuator coil 70 are arranged so that coil 70 is placed in the magnetic field created by magnet 66.
  • Actuator magnet 66 is preferably a single piece, bipolar magnet, preferably comprised of neodymium iron boron.
  • Magnet 66 includes regions 66a and 66b for providing first and second magnetic fields B, and B 2 between respective poles in each region 66a and 66b, and bottom plate 53.
  • the magnetic fields are encompassed in a closed magnetic circuit including various portions of the top plate 55, bottom plate 53, and support member 62.
  • the magnetic field intensity of each field is increased in the region between the respective poles of the magnet and the bottom plate 53.
  • the strength of the magnetic field in this region is directly related to the torque which the voice coil exerts on the actuator arm assembly 52, and thus the rotational (angular) velocity of the actuator arm assembly 52 and the seek times for the drive.
  • Placing coil 70 between subarms 56a and 56b reduces the gap between magnet 66 and bottom plate 53, thereby decreasing flux leakage and increasing the strength of the respective magnetic fields.
  • currents passing in opposite directions in coil 70 create torques in opposite directions to magnetic fields B, and B 2 so that actuator arm assembly 52 and the components mounted thereon may be pivoted to position heads at selected locations between inside and outside diameters of the data region on the disk 22.
  • control signals are provided to the coil 70 via reverse flex circuit 32 (Fig. 2) to selectively control the actuator assembly 50 to position heads 60 at specific individual data tracks on disk 22.
  • disk 22 comprises a two-sided platter having a total of 1805 tracks, yielding an unformatted storage capacity of approximately 112.3 Mbytes and a formatted capacity of 85 Mbytes.
  • a plated, 1300 Oe disk for use in the disk drive of the present invention is currently available from Mitsui Comtek, Inc., a subsidiary of Mitsui & Co pany, U.S.A., Inc., 12980 Saratoga Avenue, Saratoga, California 95070-4666.
  • Tables 1 and 2 below specify certain characteristics of disk 22.
  • a latch mechanism for securing the actuator arm assembly 52 in response to signals from the PCB 15 directing a "parking" of the drive, typically used whenever power is off and during transportation of the disk drive.
  • the latch means comprises a second latch arm 58 mounted perpendicular with respect to the longitudinal axis of first and second actuator support arms 52a and 52b.
  • Latch arm 58 has mounted thereon a magnetic capture element 57 which secures the actuator arm assembly 52 in a position where the read/write heads 60a and 60b are over a landing zone corresponding to a position at the innermost diameter of disk 22.
  • Bumper 64 has a recess 64a for embedding magnet 68 therein.
  • Bumper 64 and magnet 68 when assembled, are mounted in cavity 62b formed in column 62a of support member 62.
  • actuator assembly 50 is driven in the manner described above to position heads 60a and 60b at the innermost diameter of the disk 22.
  • capture member 57 pivots via arm 58 into a slot (not shown) provided in column 62a.
  • the magnetic forces generated by magnet 68 are such that capture member 57 is drawn into engagement with bumper 64 and thereby secures the position of the actuator arm assembly 52 at the innermost diameter location of the disk 22.
  • Actuator assembly 50 provides average data seek times of less than about 19 milliseconds, due to the high power-to-mass ratio of the voice coil motor and arm assembly 52, and the small moment of inertia of actuator arm assembly 52.
  • the latch mechanism described above serves as the inside diameter crash stop for the actuator arm assembly
  • this inner crash stop is defined at a track radius of 0.88 inch.
  • a support post 34 serving as an outside diameter crash stop positioned between cover 14 and base 12. The outside diameter crash stop 34 inhibits movement of the actuator arm assembly 52 past an outer-most diameter of the drive, preferably at a track radius of about 1.83 inches.
  • Fig. 3A is a sectional view along line 3-3 in Fig.
  • FIG. 3 details the assembly of spin motor 20, a rotating shaft motor, in which a stator assembly 38 including stator lamination 39 is mounted in the recess 17 of base 12.
  • First and second bearings 36 and 37 rotat.ably mount shaft 33 in the stator assembly 38.
  • the use of a rotating shaft motor reduces the friction attributable to bearings 36 and 37, since rotation of the inner race (not shown) of each bearing 36 and 37 as opposed to the outer race (not shown) causes fewer rotations of the ball bearings between the inner the outer races.
  • a hub 35 on shaft 33 supports disk 22 and rotor 41.
  • the rotor 41 may comprise a multi-pole ring magnet.
  • Spin motor 20 induces a disk rotation speed of approximately 2,892 rp in response to control signals provided by PCB 15 via flex cable 30.
  • Rotational control signals are generated by PCB 15 in conjunction with positioning signals for actuator assembly 50 to enable specific data retrieval.
  • Fig. 3 also shows the relationship of the read/write heads 60a and 60b to the disk 22. Heads 60a and 60b are supported by actuator assembly 50 which allows the heads 60a and 60b to "fly" over the surfaces of the disk 22 on the air float created by rotation of the disk 22. Flexures 54a and 54b provide a gimballing action which allows heads 60a and 60b to fly flat, thereby orienting the surface of each head 60a and 60b facing disk 22 so that it is parallel to the surface of disk 22 while disk 22 is rotating and each flexure 54a or 54b is under load. In the preferred embodiment, the heads 60 fly at a height of approximately 6.0 microinches over the disk. Each head 60 represents a load of approximately 5 grams on each flexure 54.
  • Fig. 3B details the bearing assembly 40 of the actuator assembly 50.
  • Fig. 3B is an exploded view of the actuator mounting assembly shown in Fig. 3A.
  • Fig. 3B specifically shows bearing assembly 40 mounted on actuator sleeve 42 abutting bottom plate 53.
  • Actuator sleeve 42 is- secured to bottom plate 53 of actuator assembly 50 and base 12 by means of an actuator support pin 65 threaded to receive hex nut 45.
  • Actuator arm assembly 52 is mounted to an outer sleeve 48 containing actuator bearing cartridges 47a and 47b housing actuator bearings 46. Cartridges 47a and 47b are separated by a spacer 44.
  • Housing 48, shaft 33, and spacer 44 may be manufactured from, for example, stainless steel.
  • Actuator bearing assembly 40 provides a maximum torque of 1.3 grams per centimeter as measured on the inner shaft with the outer housing rotating at 200 rpm thereby aiding in the reduction of data seek times.
  • the disk drive described herein provides a high-speed, low-power, compact disk drive suitable for use in portable computers.
  • the drive utilizes an average of 2.5 watts during seek functions and 3.5 watts when reading or writing information, and has a data average access time less than about 19 ms .
  • Numerous variations are possible as will be apparent to those skilled in the art; such variations are intended to be within the scope of the invention as defined by this specification and the following claims are intended to cover all the modifications and equivalents falling within the scope of the invention.

Landscapes

  • Moving Of Heads (AREA)

Abstract

Une unité de disque dur (10) dont les dimensions sont 5,15 pouces de long, 4,00 pouces de large et 0,805 pouce de haut est décrite. L'unité de disque (10) comprend un couvercle (14) s'engageant avec une base (12) pour former entre eux un environnement régulé isolé des conditions atmosphériques ambiantes. Un support de mémorisation, comprenant un seul disque métallisé magnétique (22) pourvu d'un point central (21) au milieu d'une multiplicité de pistes concentriques, est monté rotatif sur ladite base (12) à l'intérieur de l'environnement régulé. Un élément (20) servant à faire tourner le support de mémorisation autour d'un axe passant à travers son centre, comprenant de préférence un moteur à axe de commande (20), est aussi monté sur ladite base (12). Des transducteurs (60), au nombre de un par surface de disque et servant à lire et à écrire des informations dans le disque (22), sont montés sur un actionneur (50) qui place les transducteurs (60) sur des pistes concentriques individuelles choisies du disque (22). Une plaquette à circuits imprimés (PCB) (15) fournit des signaux de commande au moteur d'axe (20), aux transducteurs (60) et à l'actionneur (50) afin de permettre l'accès sélectif aux données mémorisées.
PCT/US1991/002253 1990-05-23 1991-04-02 Architecture de micro disque dur extra plat WO1991018390A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP91508000A JPH05507170A (ja) 1990-05-23 1991-04-02 薄型系列マイクロハードディスク構成物

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US52759090A 1990-05-23 1990-05-23
US527,590 1990-05-23

Publications (1)

Publication Number Publication Date
WO1991018390A1 true WO1991018390A1 (fr) 1991-11-28

Family

ID=24102105

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1991/002253 WO1991018390A1 (fr) 1990-05-23 1991-04-02 Architecture de micro disque dur extra plat

Country Status (2)

Country Link
EP (1) EP0530217A4 (fr)
WO (1) WO1991018390A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5357386A (en) * 1992-11-13 1994-10-18 Seagate Technology, Inc. Disc drive with head/disc assembly having sealed connectors
EP0712129A1 (fr) * 1993-07-30 1996-05-15 Citizen Watch Co. Ltd. Dispositif a disques magnetiques
EP0766233A3 (fr) * 1991-06-10 1998-01-07 Fujitsu Limited Entraínement de disque magnétique
US7701663B2 (en) 2005-12-19 2010-04-20 Samsung Electronics Co., Ltd. Hard disc drive including ground rib to connect cover and base

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4712146A (en) * 1985-06-04 1987-12-08 Plus Development Corporation Thin and compact micro-Winchester head and disk assembly
US4814913A (en) * 1986-07-18 1989-03-21 Fujitsu Limited Compact magnetic disc assembly
US4908793A (en) * 1986-10-17 1990-03-13 Hitachi, Ltd. Storage apparatus including a semiconductor memory and a disk drive
US4933785A (en) * 1988-03-01 1990-06-12 Prairietek Corporation Disk drive apparatus using dynamic loading/unloading
US4965684A (en) * 1988-01-25 1990-10-23 Conner Peripherals, Inc. Low height disk drive

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4602305A (en) * 1983-05-23 1986-07-22 Seagate Technology Magnetic disc memory apparatus incorporating temperature compensation
US4819100A (en) * 1986-09-24 1989-04-04 Alps Electric Co., Ltd. Floating head slider device for magnetic disk apparatus
ATE110489T1 (de) * 1987-05-29 1994-09-15 Conner Peripherals Inc Plattenantriebs-aufbau.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4712146A (en) * 1985-06-04 1987-12-08 Plus Development Corporation Thin and compact micro-Winchester head and disk assembly
US4814913A (en) * 1986-07-18 1989-03-21 Fujitsu Limited Compact magnetic disc assembly
US4908793A (en) * 1986-10-17 1990-03-13 Hitachi, Ltd. Storage apparatus including a semiconductor memory and a disk drive
US4965684A (en) * 1988-01-25 1990-10-23 Conner Peripherals, Inc. Low height disk drive
US4933785A (en) * 1988-03-01 1990-06-12 Prairietek Corporation Disk drive apparatus using dynamic loading/unloading

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0530217A4 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0766233A3 (fr) * 1991-06-10 1998-01-07 Fujitsu Limited Entraínement de disque magnétique
US5969907A (en) * 1991-06-10 1999-10-19 Fujitsu Limited Magnetic disk drive
US5357386A (en) * 1992-11-13 1994-10-18 Seagate Technology, Inc. Disc drive with head/disc assembly having sealed connectors
EP0712129A1 (fr) * 1993-07-30 1996-05-15 Citizen Watch Co. Ltd. Dispositif a disques magnetiques
EP0712129A4 (fr) * 1993-07-30 1996-12-27 Citizen Watch Co Ltd Dispositif a disques magnetiques
US5671103A (en) * 1993-07-30 1997-09-23 Citizen Watch Co., Ltd. Sealed, dust-proof magnetic disk drive
US7701663B2 (en) 2005-12-19 2010-04-20 Samsung Electronics Co., Ltd. Hard disc drive including ground rib to connect cover and base

Also Published As

Publication number Publication date
EP0530217A1 (fr) 1993-03-10
EP0530217A4 (en) 1993-09-08

Similar Documents

Publication Publication Date Title
US5025335A (en) Architecture for 21/2 inch diameter single disk drive
US6226143B1 (en) Disk drive having support posts aligned with storage disk and actuator mounting points to reduce mechanical off-tracking
US5808830A (en) Architecture for 2-1/2 inch diameter single disk drive
EP0556287B1 (fr) Architecture d'unite de disques de haute performance
US6011670A (en) Disk drive with integrated presassembled actuator and header assembly and spin motor assembly
US6429999B1 (en) Pre-assembled voice coil magnetic assembly and rotatable attachment structure/method to base plate for disc drive
US5329412A (en) Two and one half inch diameter disk drive having 0.6 inch height
US6172843B1 (en) Shroud mounted disc snubber
US5841610A (en) Miniature hard disc system having single voice coil magnet motor
US6226145B1 (en) Actuator assembly mounted disc snubber
KR100221373B1 (ko) 디스크 드라이브 조립체
US6069766A (en) Miniature hard disc drive having low profile actuator arm voice coil and spindle motors
US5193037A (en) Compact disk drive for use with laptop computer
WO1992001283A1 (fr) Unite de disque de faible hauteur
WO1991018390A1 (fr) Architecture de micro disque dur extra plat
US20020075603A1 (en) Information recording and reproducing apparatus
JP2753220B2 (ja) 情報記録再生装置
WO1999009545A1 (fr) Ensemble tiroir pour unite de disque
JPH05507170A (ja) 薄型系列マイクロハードディスク構成物
WO1993010531A1 (fr) Moteur de bobine mobile a couple constant et petite dimension
WO1998037559A1 (fr) Bras d'actionnement profile
WO1994022133A1 (fr) Unite de disques a haute capacite de deux pouces et demi

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP KR

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LU NL SE

WWE Wipo information: entry into national phase

Ref document number: 1991908438

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1991908438

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1991908438

Country of ref document: EP