Fujitsu Corporation

Yoshihiro Arikawa

Norio Yagi

Kazunori Akama

Kaho Nishimura

Hirofumi Suzuki

Kaoru Abiko

Yasuhiko Kato

Ryuzi Satou

A disk drive includes a latch mechanism. A lever and a weight are supported on a first shaft. The lever defines first and second operating spots distanced from the first shaft by first and second distances, respectively. The weight is distanced from the first shaft by a third distance shorter than the first and second distances. A swinging member is supported on a second shaft at a position defined between the first and second operating spots within a space between the lever and the cover of the enclosure. Even if impact acts on the disk drive, the lever is received on the swinging member between the first and second operating spots. The lever is prevented from moving in the axial direction of the first shaft. Contact is reliably prevented between the lever and the cover. Generation of noise can thus be avoided.

Recording disk drive with enhanced swinging member

A lever and a weight are supported on a first shaft for swinging movement in a latch mechanism. The weight gets closer to a head actuator member based on swinging movement in a first direction. A restriction member restricts the swinging movement of the weight in a second direction opposite to the first direction. A swinging member is contacted with the lever swinging around the first shaft so that the swinging member gets into a predetermined path of the head actuator member through the swinging movement around the second shaft. The disk drive always allows the weight, the lever and the swinging member to start swinging from corresponding inoperative positions, even if the disk drive suffers from a sequential driving force in opposite directions due to impact. A head slider at the tip end of the head actuator member is reliably prevented from colliding against the disk.

Disk drive internal latch assembly with movement restriction member to generate opposing rotation moments on shaft opposing sides

A guiding passage is formed on a ramp member. The guiding passage defines an inclined surface angled towards plane including the surface of a recording disk at a position toward an inoperative position. A restriction member is allowed to restrict the movement of the load tab on the inclined surface when the load tab moves from the inoperative position toward the recording disk. If an impact acts on a recording disk drive when the recording disk stands still, the restriction member serves to restrict the movement of the load tab on the inclined surface. The elasticity of a head suspension enables the load tab to move down the inclined surface. The downward movement of the load tab causes a reduction in deformation of the head suspension. The head suspension thus receives a smaller load.

Disk drive capable of restricting unexpected movement of a head suspension using a latch member to restrict movement of the suspension and elasticity of the suspension to enable a head load tab to move down a ramp inclined surface

A recording medium drive such as a hard disk drive includes a ramp member. The ramp member receives the tip end of a head actuator. A head slider is thus kept at a position spaced from the recording medium even when the recording medium stands still. A rectifier plate is formed on the ramp member and opposed to the surface of the recording medium at a distance. The rectifier plate serves to sufficiently suppress turbulence of airflow generated along the surface of the rotating recording medium. The suppression of the turbulence in this manner leads to prevention of oscillation of the head slider. The head slider can thus be positioned right at a target point at a higher accuracy. The recording medium drive of the type is capable of greatly contributing to a higher recording density.

Recording medium drive having rectifier plate integral to ramp member

A disk device includes a chassis base, at least one disk rotatably supported on the chassis base, at least one carriage arm pivotable about an axis on one end and, at the other end, having a slider with a read/write head and a load bar extending from the slider, a ramp member attached to the chassis base at a position outside the disk, the ramp member having a guiding part and a parking part, and an actuator for driving the carriage arm between a loaded position in which the slider is held above the disk and an unloaded position in which the load bar rests on the parking part of the ramp member. The ramp member is provided with cleaning structure for removing powder attached to the load bar as the load bar moves along the parking part. The disk device is further provided with timing offsetting structure for offsetting the timing of the load bar of one of the carriage arms ascending the guiding part from the timing of the load bar of one of the other carriage arms ascending the guiding part when the carriage arms are driven to move from the unloaded position to the loaded position.

Disk device having powder removal apparatus and disk device having timing offsetting apparatus for loading

A magnetic disk drive comprises a plurality of disks that have a laminated arrangement with equally fixed spaces respectively and are rotatably mounted a disk driving unit that forces the disks to rotate, a plurality of positioners mounted and movable in the direction of the tracks of the disks respectively, a positioner driving unit that drives the positioners so that their respective ends can traverse the tracks, and a plurality of reproducing/recording elements e.g., unitary magnetic heads that are fixed on the respective ends of the positioners and perform read/write operations for the surfaces of recording media of the disks, respectively. Each of the unitary magnetic heads is constructed such that each of said heads has a predetermined inclination is to the respectively corresponding surface of recording media of the disks, preferably by forming a sloping surface on one end of each positioner. Preferably, circuits for controlling the disk driving unit and the magnetic head, etc., of a disk drive are composed of a flexible printed circuit board to be contained in the disk enclosure having a base and cover.

Magnetic disk drive

A magnetic disk drive comprises a plurality of disks that have a laminated arrangement with equally fixed spaces respectively and are rotatably mounted a disk driving unit that forces the disks to rotate, a plurality of positioners mounted and movable in the direction of the tracks of the disks respectively, a positioner driving unit that drives the positioners so that their respective ends can traverse the tracks, and a plurality of reproducing/recording elements e.g., unitary magnetic heads that are fixed on the respective ends of the positioners and perform read/write operations for the surfaces of recording media of the disks, respectively. Each of the unitary magnetic heads is constructed such that each of said heads has a predetermined inclination to the respectively corresponding surface of recording media of the disks, preferably by forming a sloping surface on one end of each positioner. Preferably, circuits for controlling the disk driving unit and the magnetic head, etc., of a disk drive are composed of a flexible printed circuit board to be contained in the disk enclosure having a base and cover.

A magnetic disk drive comprises a plurality of disks that have a laminated arrangement with equally fixed spaces respectively, and are rotatably mounted, a disk driving unit that forces the disks to rotate, a plurality of positioners that are mounted movably in the normal direction to the tracks of the disks, respectively, a positioner driving unit that drives the positioners so that their respective ends can traverse the tracks, and a plurality of reproducing/recording elements e.g. unitary magnetic heads that are fixed on the respective ends of the positioners and perform read/write operations for the surfaces of recording media of the disks respectively. Each of the reproducing/recording elements is constructed such that each of the elements is adjustable in the rolling direction with respect to the respectively corresponding surface of recording media of the disks and adjustable in the distance from the respectively corresponding surface of recording media of the disks. Preferably, the method for assembling the disk drive includes the steps of locating the arras in a desired position, driving the sliding portions, detecting at least the degree of angle and relative distance between each one tip portion of the unitary magnetic heads and the respectively corresponding surfaces of recording media of the disks, and fixing the sliding portions and the guide portions to each other.

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Kawasaki, Japan

Yoshihiro Arikawa