Shape-Changing Control Panel Button Using Shape Memory Alloy
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Solution Overview
Problem
Conventional vehicle control panels with numerous buttons overwhelm users, leading to confusion and inefficiency, as they present non-functional buttons and require users to sift through complex menus, lacking tactile feedback.
Innovation Solution
A reconfigurable, shape-changing button using shape memory materials that can change from a protruding to a flat state, activated or deactivated by a control unit, reducing button complexity and preserving tactile feedback, with options for voice control and multiple operating modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional buttons are provided on the control panel, then users can access vehicle functions, but the number of buttons increases leading to user overwhelm and confusion
Solution Approach 1:
The button changes its physical shape dynamically between protruding and flat states based on activation status. The central region can protrude from the surface plane when active and extend substantially in the surface plane when inactive, allowing the control panel to adapt its complexity level based on current operational needs
Solution Approach 2:
The shape memory material is pre-configured with a memory shape that defines the protruding button configuration. The control system can activate the button in advance by heating the shape memory material to transform it from flat to protruding state, preparing the interface for upcoming functions
2Adaptability or versatility
If all buttons are presented to the user, then all functions are accessible, but non-functional buttons increase information overload
Solution Approach 1:
Different regions of the control panel have different button states - some buttons protrude while others remain flat. This local differentiation allows the interface to highlight currently relevant functions while minimizing distracting information about unavailable functions, creating a more focused user experience
3Ease of manufacture
If rigid buttons are used, then manufacturing is simple, but tactile feedback is limited and user perception is reduced
Solution Approach 1:
The button's physical parameters change dynamically - the central region transitions from a flat configuration to a protruding configuration. This parameter change creates tactile feedback when the button is activated, allowing users to physically perceive which functions are currently available without adding mechanical complexity to the manufacturing process
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 solution simplifies the control panel by presenting only needed buttons, reducing clutter, enhancing user friendliness, and maintaining tactile feedback, while reducing manufacturing costs and assembly complexity.
Implementation Method 1
at least the central portion of the button includes a shape memory material. The shape memory material exhibits a bistability such that it forms a protrusion on the surface plane when the button is in the active state; and the shape memory material forms a substantially flat layer extending in the surface plane when the button is in the inactive state
Implementation Method 2
the shape memory alloy wire mesh has an ohmic resistance and is configured to be heated with an electric current flowing through the shape memory alloy wire mesh; and the shape memory alloy wire mesh has a memory shape and deforms into the memory shape when heated to a given transformation temperature
Data Source
AI summary
A button configuration includes a shape-changing button that has a central region and a peripheral region. The peripheral region encircles the central region and defines a surface plane. The shape-changing button has an active state and an inactive state. The central region of the button protrudes from the surface plane and provides a push button function when the button is in the active state. The central region of the button extends substantially in the surface plane and provides no push button function when the button is in the inactive state. A control panel having shape-changing buttons is also provided.