Seat Button Assembly Ramp Feedback Mechanism
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Solution Overview
Problem
Existing seat assemblies lack an effective mechanism for providing tactile feedback and efficient actuation of a latching mechanism to enable or disable movement of seat components, such as headrests, which is crucial for user convenience and safety.
Innovation Solution
A button assembly with a bezel and button that includes a ramp feature and feedback arm, which provides tactile feedback when actuated, engages a latching mechanism to permit movement of seat components by applying sufficient force, utilizing a biasing member to assist in the actuation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a button assembly with ramp feature and feedback arm is implemented, then tactile feedback is provided to users, but device complexity increases
Solution Approach 1:
The feedback arm and ramp feature are integrated into a single unified structure rather than separate components. The feedback arm is formed as part of the button assembly housing, with the ramp feature directly molded or formed into the same piece, reducing part count while maintaining tactile feedback functionality.
Solution Approach 2:
The feedback arm automatically engages with the ramp feature during button actuation without requiring external control mechanisms. The mechanical interaction between the feedback arm and ramp surface self-generates the tactile feedback sensation, eliminating the need for additional sensors, actuators, or control systems.
2Ease of operation
If a latching mechanism is engaged by the button assembly, then movement of seat components is controlled, but device complexity increases
Solution Approach 1:
The button assembly serves as an intermediary mechanism between the user and the latching mechanism. Instead of directly manipulating the latching mechanism, the user interacts with the simpler button, which then actuates the latching mechanism through the feedback arm's engagement with the ramp feature, providing mechanical advantage and motion transformation.
Solution Approach 2:
The system is divided into distinct functional modules: the button assembly with feedback mechanism, the latching mechanism, and the seat component. This segmentation allows each module to be optimized independently - the button assembly provides user interaction with tactile feedback, while the latching mechanism handles the secure locking function.
3Ease of operation
If sufficient force is applied to actuate the button, then the latching mechanism is released, but user effort increases
Solution Approach 1:
The ramp feature utilizes a curved surface geometry instead of a flat or linear incline. This curved profile is optimized to distribute the actuation force over a longer distance and provide progressive mechanical advantage, reducing the peak force required from the user while still achieving reliable latching mechanism release.
Solution Approach 2:
The feedback arm is designed with specific flexibility and engagement characteristics that dynamically adapt during actuation. As the button is pressed, the feedback arm progressively engages the ramp feature, creating a dynamic force multiplication effect that reduces the user effort needed compared to a rigid direct-connection system.
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 button assembly effectively provides tactile feedback and enables efficient actuation of the latching mechanism, allowing for easy unlocking and locking of seat components, enhancing user experience and safety by ensuring intuitive operation.
Implementation Method 1
The biasing member engages the cross member and the button and exerts a biasing force on the button
Data Source
AI summary
A seat assembly having a button assembly. The button assembly includes a bezel having a ramp feature and a button having a feedback arm that engages the ramp feature. Movement of at least a portion of a seat component is permitted when sufficient force is applied to the button.