Rearview Mirror Button Interface Stability
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Solution Overview
Problem
Conventional rearview mirrors with button interfaces often move unnecessarily when buttons are depressed, causing driver distraction due to the direct force application on the circuit board, leading to the need for repositioning the mirror.
Innovation Solution
A button engagement interface with first and second apertures and rearwardly-extending engagement tabs that secure buttons in place, allowing them to activate a switch without direct contact with the circuit board, thereby minimizing movement of the rearview device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If buttons are directly coupled to the circuit board, then the button interface is simple to manufacture, but the rearview device moves unnecessarily when buttons are depressed
Solution Approach 1:
The button assembly is segmented into distinct components: the button body, engagement tabs, and the circuit board with switch. This segmentation allows the button to be pressed without directly coupling it to the circuit board, isolating the force application and preventing unwanted movement of the rearview device while maintaining manufacturing simplicity
Solution Approach 2:
The engagement tabs act as an intermediary mechanism between the button and the circuit board. When the button is pressed, the engagement tabs transmit the force to actuate the switch without creating a direct rigid connection that would cause the entire rearview device to move, thus stabilizing the device position during operation
2Stability of the object's composition
If buttons are secured with engagement tabs extending through apertures, then the rearview device remains stable when buttons are pressed, but the button assembly structure becomes more complex
Solution Approach 1:
The engagement tabs are merged with the button body as an integrated feature, and the apertures are merged with the circuit board structure. This combining of features reduces the number of separate components and simplifies the overall assembly process, achieving stable button operation without significantly increasing device complexity
Solution Approach 2:
The engagement tabs are designed to automatically engage with the circuit board through the apertures during assembly, providing self-alignment and self-securing functionality. This self-service mechanism eliminates the need for additional fastening operations or complex mounting structures, maintaining manufacturing simplicity while ensuring stable button operation
Data Source
AI summary
A rearview device having a housing defining at least one button opening. A travel guide defines a button engagement interface. The button engagement interface defines a first aperture and a second aperture. A circuit board is in abutting contact with the travel guide. A switch is disposed between the first aperture and the second aperture. At least one button is operably coupled with the button engagement interface. The at least one button is in communication with the switch.