摘要:
A clamping structure for disk drive for receiving a disk includes a spindle hub, a spacer, and a clamp ring. The spindle hub has a flange at a first end thereof. The flange has a first protruding portion. The discs are stacked on the first protruding portion. The first spacer is interposed between adjacent ones of the disks. The clamp ring is fixed to a second end of the spindle hub. The clamp ring has a second protruding portion for biasing the disks toward the flange of the spindle hub. In a process of forming a holder arm of the disk drive, the tip of a holder arm is contoured by wire cutting method after the holder armed is roughly formed from a metal body. In the wire cutting method, a voltage is placed between the metal body and the wire. The tip of the holder is contoured by the wire by bringing the wire into contact with the metal body.
摘要:
A process for reducing deformation of a holder arm, which holds a head of a data recording device, includes cutting a metal body to form the holder arm and contouring a tip of the holder arm by wire cutting. The step of contouring preferably includes steps of placing a voltage between the metal body and a wire, moving the wire, and bringing the wire adjacent the metal body to contour the tip of the holder arm.
摘要:
A magnetic disk drive capable of reducing the influence of a tension ascribable to the forming of a flexible printed circuit (FPC), which transfers the output signal of a magnetic head, on a carriage. The curved configuration and arrangement of the FPC are changed to minimize the tension ascribable to the FPC even when the carriage seeks the inner or outer peripheral portion of a magnetic disk.
摘要:
A magnetic disk drive capable of reducing the influence of a tension ascribable to the forming of a flexible printed circuit (FPC), which transfers the output signal of a magnetic head, on a carriage. The curved configuration and arrangement of the FPC are changed to minimize the tension ascribable to the FPC even when the carriage seeks the inner or outer peripheral portion of a magnetic disk.
摘要:
The present invention provides a rubber blanket for an offset printing, comprising a surface rubber layer, a first fabric layer, a compressible layer and a second fabric layer, wherein the thickness of the blanket falls within a range of between 1.65 mm and 3 mm, the first fabric layer is a plain weave having a thickness falling within a range of between 0.2 mm and 0.35 mm, the second fabric layer is a plain weave having a thickness falling within a range of between 0.35 mm and 0.55 mm, a tensile strength not lower than 50 kgf/cm, and an elongation at break not higher than 7.5%, and the compressible layer has a thickness falling within a range of between 0.5 mm and 2.15 mm.
摘要:
In a magnetic disk apparatus, a head driving device has a permanent magnet assembly and an arm assembly. The permanent magnet assembly has a pair of permanent magnets whose different polarities face each other with the intermediary of a pair of support members. In the arm assembly, an arm carries a magnetic head on one end and a coil on the other end. A coil is inserted between the opposite polarities of the magnets, so that the arm assembly is rotated by the Lorentz force generated in the coil. The range over which the arm assembly is rotatable is determined by the support members against which the arm assembly selectively abut. At least one of the support members is formed with a recess or groove for receiving part of the arm assembly when the assembly is rotated. Hence, despite that the support member has a substantial thickness, the movable range of the arm assembly is the same as when the support member has a small thickness. Such a support member prevents the magnetic circuit from saturating and frees the head from the influence of flux leakage.
摘要:
The magnetic disk unit has a cylindrical sleeve disposed between a plurality of bearings and an arm holder for magnetic heads rotatably supported by a head rotating shaft disposed in parallel with a disk rotating shaft for magnetic disks via the bearings. This sleeve forms a gap with the inner periphery of the arm holder to absorb a difference of thermal distortion in the radial direction of the arm holder and the bearings. Thus, thermal offtrack characteristics can be improved significantly.
摘要:
A magnetic disk drive capable of reducing the influence of a tension ascribable to the forming of a flexible printed circuit (FPC), which transfers the output signal of a magnetic head, on a carriage. The curved configuration and arrangement of the FPC are changed to minimize the tension ascribable to the FPC even when the carriage seeks the inner or outer peripheral portion of a magnetic disk.
摘要:
A magnetic disk drive is disclosed which has head sliders constituting a magnetic head and pressed against magnetic disks which are rotatable at high speed. The head sliders are made up of data head sliders for writing and reading data out of the disks and servo head sliders for positioning the data head sliders. The head sliders are each affixed to a gimbal spring which is in turn affixed to a load spring. Each load spring is directly affixed to the spacers at the other end thereof. The spacers are made of the same material as the load springs or made of at least two different materials.
摘要:
An arm assembly has a front end portion on which a plurality of magnetic heads opposed to a plurality of magnetic disk media, respectively, for writing/reading information are mounted, a rear end portion having a C shaped arm formed with a pair of holes or recesses having a predetermined depth and a center portion rotatably supported by a rotational shaft through bearings. A coil is fixedly secured to an inside surface of the C shaped arm through an adhesive for driving the arm assembly. A permanent magnet assembly is disposed in a location opposing the coil and constituting a magnetic circuit together with the coil. A pair of stoppers are provided on opposite sides of the C shaped arm with predetermined spaces and adapted to restrict a rotational movement of the C shaped arm by contacting with collision surfaces of the C shaped arm. The holes or the recesses of the C shaped arm may be filled with elastic material having superior vibration attenuating characteristics.