Retractable Tactile Interface for Vibration-Prone Cockpit Access
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Solution Overview
Problem
Ergonomic challenges arise in tactile control interfaces, particularly in aircraft cockpits, due to vibrations and space constraints, leading to difficulties in accurately positioning fingers on control areas, increasing the risk of handling errors and fatigue.
Innovation Solution
A retractable tactile control interface with a hinged touch pad and support, featuring a capacitive touch surface with electrically conductive tracks and a convex outer profile, integrated into an aircraft seat armrest, allowing for easy deployment and retraction and enhanced user accessibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the tactile interface is made retractable to save space and improve ergonomics, then the ease of operation is improved, but the device complexity increases due to the hinge mechanism and drawer structure
Solution Approach 1:
The interface transitions from a static fixed position to a dynamic retractable position using a hinge mechanism. The touch pad can be deployed when needed and retracted when not in use, allowing the interface to adapt its state based on operational requirements. This dynamic capability resolves the contradiction by providing ease of operation during use while allowing space savings when retracted.
Solution Approach 2:
The touch pad is nested within the support structure through a drawer-like mechanism. When retracted, the touch pad fits inside the support housing, effectively hiding the interface within the aircraft panel. This nesting approach maximizes space utilization while maintaining full functionality when deployed.
2Ease of operation
If the touch pad is made convex with hollow shell to improve ergonomics and finger positioning, then the ease of operation is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The touch pad employs a convex curved surface instead of a flat plane. This curvature naturally guides finger placement and provides tactile feedback, improving ergonomics and positioning accuracy. The convex shape accommodates the natural anatomy of the finger, making it easier to locate and press the correct area without requiring extreme manufacturing precision.
Solution Approach 2:
The touch pad structure transitions from a solid flat surface to a hollow convex shell. This parameter change in geometry and internal structure allows the surface to deform slightly under finger pressure, providing tactile feedback that enhances positioning accuracy without requiring extremely tight manufacturing tolerances on the outer surface.
3Ease of operation
If the interface is integrated into the seat armrest to improve accessibility, then the ease of operation is improved, but the available installation space is reduced
Solution Approach 1:
The interface is moved from a traditional horizontal panel mounting to a vertical integration within the seat armrest structure. This dimensional repositioning utilizes the vertical space of the armrest, effectively bringing the interface closer to the user's hand while not consuming additional horizontal dashboard space. The retractable mechanism further optimizes this limited space by allowing the interface to be stored within the armrest volume.
4Ease of operation
If the drawer support is made movable to enable deployment, then the ease of operation is improved, but the stability of the interface composition deteriorates during operation
Solution Approach 1:
The support structure transitions from a static fixed mount to a dynamic movable drawer mechanism. This allows the interface to be deployed and retracted as needed, improving accessibility while maintaining stability during active use through proper mechanical design of the drawer guides and hinges.
Solution Approach 2:
The mechanical drawer system replaces traditional fixed mounting methods. The drawer mechanism incorporates guides, rails, or sliding surfaces that constrain movement to a precise linear path, ensuring the interface remains stable and properly positioned during operation while still allowing smooth deployment and retraction.
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
The interface provides improved ergonomic design, reducing fatigue and error risks by allowing easy access and precise finger positioning, even in vibrating environments, through its capacitive touch detection and compact, ergonomic design.
Implementation Method 1
the touch pad includes a touch bearing surface with a convex outer profile... the touch pad comprises two arrays of electrically conductive tracks which are separated and electrically insulated by a substrate comprising a hollow shell with a convex outer profile
Data Source
AI summary
A tactile interface including a touch pad and a support, the touch pad being hingedly attached to the support between the extended active position and a retracted inactive position, in which the pad is folded back towards the support wherein the support constitutes a drawer which is movable in a casing between a pulled-out position in which the interface is in the active position and an inserted position in which the interface is in the retracted position.