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AssigneeHitachi, Ltd.
InventorsMasahiko Sega, Tomio Suzuki, Tsuyoshi Takahashi, Hiroyuki Mitsuhashi, Tetsuo Yuki, Takashi Matsuki
Estimating the term…
A magnetic disk device has a large capacity with a small and thin structure and includes a spindle system, an actuator system, a control package for controlling the systems, and a PCMCIA connector. The spindle system is of an in-hub structure wherein two magnetic disks are rotated in inside diameter portions of the magnetic disks. The actuator system has sliders mounting magnetic heads for writing and reading magnetic information to and from the magnetic disks, guide arms and suspension structures. The suspension structures also include a coil, a magnetic circuit for imparting a drive force in cooperation with the coil, a coil holder for supporting the coil, a pivot sleeve for rocking the guide arms, the coil holder and spacers which are integrally laminated to each other, bearings and a pivot shaft. The PCMCIA connector connects to the control package and is fixed by the housing and a package cover.
A magnetic disk device, comprising:
A magnetic disk device, comprising:
A magnetic disk device, comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
No related US applications are recorded in the indexed filing history.
Disposition of constructional parts in the apparatus, e.g. of power supply, of modules: the apparatus comprising a single recording/reproducing device
Using flat record carriers, e.g. disc, card: using rotating discs
Information storage based on relative movement between record carrier and transducer
Term ended 19 Aug 2016 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
The present invention relates to a magnetic disk device, and in particular to a magnetic disk device having a large capacity and high reliability with a small and thin structure.
Magnetic disk devices tend to increase in memory density and capacity every year, and are expected to be used in many applications other than just as large external memory devices added to a conventional general computer system or personal computer. For example, proposed uses for a magnetic disk device include mounting it in a portable small-sized information processing apparatus, which allows a user to carry necessary data recorded in the magnetic disk device outdoors.
If a magnetic disk device is to be mounted in a portable small-sized information processing apparatus, however, it is essential to make the magnetic disk device small and thin. In this regard, the goal of magnetic disk device design is aimed at reducing the size of the device so that it satisfies a size (thickness: 5 mm or less) requirement of a so-called PC card specification of PCMCIA (Personal Computer Memory Card International Association)/JEIDA (Japan Electronic Industry Development Association) and the like. A variety of mechanisms have been disclosed for satisfying such a device thickness of 5 mm or less in a magnetic disk device using a small diameter disk having a diameter of 1.8 inch.
FIG. 1 is a plan view of a first embodiment of a magnetic disk device of the present invention, partially cut away to shown details of the interior parts;
FIGS. 2(a), 2(b) and 2(c) are sectional views taken along lines 101--101, 102--102 and 103--103, respectively, shown in FIG. 1;
FIG. 3 is a detailed view of a portion of the magnetic disk device of FIG. 1 showing the mounting portion for mounting the magnetic disks and the sliders;
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view of a configuration of one embodiment of the magnetic disk device of the present invention, partially cutaway to show interior parts thereof. FIGS. 2(a), 2(b) and 2(c) are sectional views taken on lines 101--101, 102--102, and 103--103 of FIG. 1, respectively.
Referring to FIG. 1 and FIGS. 2(a) to 2(c), a magnetic disk device 1 includes a head/disk assembly (HDA) having components A and B. The component A is a spindle system la including two magnetic disks 2; a spindle 3 contained in inside diameter portions of the magnetic disks 2 and rotating the integrally laminated magnetic disks 2; a spindle motor 9; a dynamic bearing 10; and a spindle shaft 91. The component B is an actuator system 1b including sliders 4 mounting transducers for writing and reading magnetic records to and from the magnetic disks 2 and constituting magnetic heads; suspensions 5 for supporting the sliders 4; guide arms 6 each being fixed together with the slider 4 on the same side of the suspension 5; a coil 12; a magnetic circuit 11 for generating a drive force in cooperation with the coil 12; a coil holder 7 for supporting the coil 12; a pivot sleeve 8 for rocking the guide arms 6, the coil holder 7 and spacers 13 which are integrally laminated with each other; bearings 92; and a pivot shaft 93. The magnetic disk device 1 further includes components C, D, E, F and G. The component C includes a head/coil FPC 14 (flexible printed circuit board) collectively forming a plurality of leads (not shown) for transmitting weak electric signals generated when the magnetic heads read and write information recorded on the magnetic disks 2 and a lead for feeding a current to the coil 12; a motor FPC 15 for feeding a current to the spindle motor 9; and a connector 16. The component D is a disk/actuator chamber 25 including a housing 17 for supporting the spindle system 1a and the actuator system 1b; a housing rib 18; and a disk/actuator cover 19. The component E is a control package 22 assembled by integrated circuit elements 20 such as an IC and LSI, electronic circuit parts (not shown) other than the integrated circuit elements 20, and a circuit board 21. The component F is a package chamber 26 including the housing 17 and a package cover 23. The component G is a PCMCIA connector 24 fixed by the housing 17 and the package cover 23.