Magnetic Disk Ramp Positioning via Nested Support Sleeve
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Solution Overview
Problem
Existing magnetic disk devices face challenges in efficiently positioning and fixing the ramp within the housing, leading to increased processing regions and design complexities.
Innovation Solution
The magnetic disk device incorporates a pedestal with a support sleeve and a ramp featuring a second sleeve that engages with the pedestal, allowing for easy positioning and fixation using a screw, thereby reducing the need for additional contact faces and holes in the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ramp is abutted against and screwed to a wall of the housing with a pin as a center of rotation, then the ramp can be positioned and fixed, but the housing requires additional processing regions including contact faces and holes which increases design complexity
Solution Approach 1:
The support sleeve is disposed inside the first hole of the pedestal, creating a nested structure where the sleeve is positioned within the housing's opening. This nesting eliminates the need for separate contact faces and reduces the processing region required in the housing, as the sleeve itself provides the positioning and fixation functions within the existing hole structure
Solution Approach 2:
The support sleeve acts as an intermediary component between the ramp and the housing. Instead of directly screwing the ramp to the housing wall, the sleeve mediates the connection by providing an internal structure that the ramp can engage with, thereby reducing the need for additional housing processing while maintaining reliable fixation
2Reliability
If additional contact faces and holes are provided in the housing for ramp installation, then the ramp can be securely fixed, but the housing design becomes more complex and processing costs increase
Solution Approach 1:
The support sleeve is disposed inside the first hole of the pedestal, creating a nested structure where the sleeve is positioned within the housing's opening. This nesting eliminates the need for separate contact faces and reduces the processing region required in the housing, as the sleeve itself provides the positioning and fixation functions within the existing hole structure
Solution Approach 2:
The support sleeve serves multiple functions: it provides positioning for the ramp, acts as a mediator for the screw connection, and reduces the housing processing requirements. This multi-functionality allows reliable ramp fixation without requiring additional specialized features in the housing design, thereby simplifying manufacturing
Data Source
AI summary
According to one embodiment, a magnetic disk device includes a base having a pedestal, a magnetic disk, an actuator that supports and drives a head, and a ramp that is provided on the pedestal and holds the head in an unloading position. The pedestal has a first face, a first hole provided in the first face, a support sleeve disposed on the first face and coaxial with the screw hole, and a recess provided in the support sleeve. The ramp has a guide face that supports the head, a second face opposing the first face, a second hole opened in the second face and configured to receive the support sleeve, and a protrusion that engages with the recess and regulates a pivoting of the ramp around the support sleeve, and is fixed to the pedestal using a fastener that is passed through the second hold and into the first hole.