Air-Actuated Load/Unload Ramp for Disk Drive
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Solution Overview
Problem
Existing disk drive configurations, such as dynamic load/unload and contact start/stop types, face issues like reduced storage capacity, potential damage to read/write heads, and 'stiction' problems that can lead to disk drive failure due to the way sliders interact with data storage disks.
Innovation Solution
The implementation of an air-actuated load/unload ramp mechanism that moves between parked and operational positions using air currents generated by rotating data storage disks, allowing the head positioner assembly to park and unlock, thereby preventing contact and maintaining optimal disk drive operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a load/unload ramp is disposed at an outer portion of each data storage disk to park the head positioner assembly, then the slider is vertically spaced away from the data storage disk, but the storage capacity of each data storage disk is reduced because an outer annular portion is not available for data storage
Solution Approach 1:
The load/unload ramp is made movable between a first position where it intersects the outer annular portion of the data storage disk during normal operations, and a second position where it is retracted to allow the head positioner assembly to park. This dynamic positioning allows the ramp to provide protection when needed while clearing the storage area during operations, resolving the contradiction between reliability and storage capacity.
2Reliability
If the head positioner assembly moves the slider toward an inner, non-data storage region of the data storage disk for termination of operations, then contact between slider and disk is established, but the slider landing zone is not available for data storage and potential damage or stiction may occur
Solution Approach 1:
The load/unload ramp serves as an intermediary structure that the head positioner assembly parks on during operational termination. Instead of the slider directly contacting the data storage disk, the ramp provides a protective interface that maintains spacing between the slider and disk, eliminating the harmful effects of direct contact while still enabling proper operational termination.
3Reliability
If the load/unload ramp is positioned to provide retaining force on the head positioner assembly, then the head positioner assembly is securely parked, but the outer annular portion of the data storage disk becomes unavailable for data storage
Solution Approach 1:
The load/unload ramp transitions between a first position where it intersects the outer annular portion to provide retaining force during parking, and a second position where it is retracted to clear the storage area. This dynamic repositioning allows the ramp to provide stable parking when needed while restoring full storage capacity during normal operations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances storage capacity utilization, reduces the risk of head damage, and prevents stiction issues by ensuring the slider remains in a non-contact, operational position during disk drive operations, thereby improving reliability and efficiency.
Implementation Method 1
Air currents from rotation of one or more data storage disks used by the disk drive generate a force that moves the load/unload ramp from a parked position to an operational position
Implementation Method 2
Air currents from rotation of one or more data storage disks used by the disk drive generate a force that moves the ramp lock to unlock the same from the load/unload ramp
Data Source
AI summary
Various air-actuated components of a disk drive are disclosed. For instance, an air-actuated load/unload ramp may be used by a disk drive and which is movable between a parked position and an operational position. An air-actuated ramp lock may be used by a disk drive to lock a movable load/unload ramp (e.g., one that may move between a parked position and an operational position). Finally, an air-actuated head positioner assembly may be used by a disk drive to lock a head positioner assembly in its parked position. In each of these cases, air currents generated by a rotation of one or more disks used by the disk drive provide the motive force for moving the noted air-actuated component at least generally from one position to another.