摘要:
A disk drive includes a disk and a head stack assembly for reading and writing to the disk. The head stack assembly includes a body portion defining a through bore that defines a pivot axis; an actuator arm cantilevered from the body portion and a head gimbal assembly coupled to the actuator arm. A coil portion is cantilevered from the body portion in an opposite direction from the actuator arm. The coil portion defines first and second actuator fork members and includes a coil supported by the first and second actuator fork members. A bobbin is configured to stiffen the coil portion, and is attached to an inner periphery of the coil. The bobbin may define a first truss and a second truss that crosses the first truss. An adhesive is disposed between the bobbin and the wound coil.
摘要:
A disk drive includes a disk drive base and a latch attached to the disk drive base. The latch includes a latch impact surface having a latch impact surface perimeter. The latch impact surface perimeter defines a latch impact surface area. The disk drive includes a head stack assembly coupled to the disk drive base. The head stack assembly includes a tang. The head stack assembly is sized and configured to rotate to a parked position with the tang in mechanical communication with the latch. The tang has a tang impact surface. The disk drive includes a damping member disposed upon and disposed between the latch and the tang for damping impact between the tang and the latch and mitigating contact between the tang impact surface and the latch impact surface. The damping member has a damping member surface area less than the latch impact surface area.
摘要:
A head suspension assembly comprising a visco-elastic coupling between a load beam dimple or protrusion and a suspension flexure to which a slider is rigidly coupled. The damping material is selected for a low static modulus, which reduces mechanical vibration by absorbing kinetic energy and releasing the energy as heat. The gimbaling function of the suspension is not significantly effected by the damping material because the damping effect occurs primarily when there is an undesirable relative velocity (movement with respect to time) between the dimple and the flexure.
摘要:
Vibration and shock mounting of an apparatus such as a disk drive is dampened through the use of one or more O-rings held in place by a bolt with a pre-determined load force applied to the mounting bracket of the device. One or more notches or slits may be selectively employed as required to equalize the force applied to multiple mounting brackets by the device.
摘要:
Disclosed is a suspension assembly for a disk drive that includes: a mounting plate having a top-side and a bottom-side; a microactuator mounting structure formed in the mounting plate; a microactuator mounted in the microactuator mounting structure in which the microactuator has a top-side and a bottom-side; and a flexure attached to the bottom-side of the of mounting plate and the microactuator. The flexure includes a pad layer and a through-hole, in which the through-hole extends through the pad layer. An epoxy on the pad layer bonds widely to the microactuator and extends through the through-hole.
摘要:
Certain example embodiments relate to torsion compensation coils that cooperate with primary coils in voice coil motors of disk drive devices, and methods of making the same. In certain example embodiments, a voice coil motor is provided which may include a single external magnet. A primary coil may be located above the external magnet, with the primary coil being capable of receiving a first current. At least one torsion compensation coil may be connected to the primary coil. The at least one torsion compensation coil may be capable of receiving a second current. The at least one torsion compensation coil may be configured to reduce torsion and/or bending forces introduced by the first current passing through primary coil and/or magnetic field leakage from the external magnet.
摘要:
A disk drive including a disk drive base. The disk drive further includes at least one rotatable disk including a disk surface extending to an outer disk edge. The disk drive further includes a head stack assembly rotatably attached to the disk drive base in operable communication with the disk. The disk drive further includes a filter coupled to the disk drive base. The filter includes a filter support disposed adjacent to the outer disk edge, and at least one filter element attached to the filter support disposed along the disk surface for filtering disk rotation induced airflow.
摘要:
A method of balancing a disk pack for use in a disk drive according to an aspect of the present invention. The disk pack includes a spindle motor and a rotatable disk. The spindle motor is configured to rotate the disk about an axis of rotation of the spindle motor. The spindle motor has a spindle motor imbalance location indicia upon the spindle motor indicative of a location of a spindle motor location imbalance. The method includes detecting the spindle motor imbalance location indicia. The method further includes placing the disk upon the spindle motor. The method further includes attaching the disk to the spindle motor with the disk being off-set from the axis of rotation based upon the detected spindle motor imbalance location indicia for balancing the disk pack by producing a disk off-set imbalance in relation to the axis of rotation.
摘要:
A new and improved latching method and assembly for positively latching a positioner carrying a read/write head of a hard disk drive in a drive landing zone during non-power conditions. The assembly includes a vertically movable latching pin which is movable along a rectilinear path of travel into and out of the horizontal path of travel of the positioner carrying the drive unit read/write head. A retention spring mounted to a support column in proximity to the landing zone engages one of two grooves disposed in the latching pin to secure the pin in a latched position or in an unlatched position. The positioner impacts the retention spring to disengage it from an associated groove on the latch pin at appropriate times so bias exerted thereon by a thermal spring will move the latch pin in a desired direction. In this regard, as the thermal spring heats, it pulls the latch pin away from the latched position and, as it cools, it urges the pin back towards the latched position.
摘要:
A shock resistant hard disk drive system employs a plurality of magnetic disks for recording data, a plurality of magnetic heads for performing input/output operation on the magnetic disks, with at least one of the magnetic heads being used as a servo head, a head-positioning mechanism for controlling the movement of the magnetic heads, a servo control mechanism or servo loop for opposing shifts in the location of the servo head, detecting device for detecting and measuring certain accelerations applied to the system, and filtering device for filtering the output of said detecting device and for providing the signal to the head-positioning mechanism. The detecting device detects and measures the magnitude of internal or external accelerations or shocks applied to the system, and provides the necessary signals to counter such accelerations. The pre-existing phase locked loop includes a voltage controlled oscillator, with the voltage control signal applied to the oscillator indicating instantaneous rotational velocity resulting from accelerations applied to the system; and this control signal is modified and applied to servo loop for the head positioner, to hold the head positioner against shifting off track.