Switch Pad Assembly Using Vacuum Seated Alignment Features
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Solution Overview
Problem
The manual assembly of switch pads to circuit boards is time-consuming and prone to quality control issues due to misalignment of conductive members and switch contacts, resulting from the flexible nature of switch pads, which leads to incomplete or incorrect seating of alignment features.
Innovation Solution
A method and apparatus that utilize alignment features on the switch pad and alignment apertures on the circuit board, where a pressure difference is generated to fully seat the alignment feature within the aperture, ensuring proper registration and alignment, using a holder and a vacuum source to facilitate the assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual assembly of switch pad to circuit board is used, then flexibility of switch pad is maintained, but misalignment of conductive member and switch contact occurs
Solution Approach 1:
Alignment features act as intermediary elements between the flexible switch pad and the rigid circuit board. These alignment features include protrusions on the switch pad that fit into corresponding apertures or recesses on the circuit board, providing mechanical guidance and precise positioning during assembly while allowing the switch pad to maintain its flexible properties for operational function.
2Reliability
If push-through details or pull-through details are added to secure switch pad, then lateral movement is prevented, but assembly complexity increases
Solution Approach 1:
The alignment features are merged with the existing structure of the switch pad and circuit board. The alignment protrusions are integrated into the switch pad body, and the alignment apertures are formed as part of the circuit board structure, eliminating the need for separate fastening components while achieving both mechanical stability and precise alignment.
3Manufacturing precision
If multiple push-through details and pull-through details are used, then misalignment is minimized, but assembly time increases
Solution Approach 1:
The alignment features are pre-formed as integral parts of the switch pad and circuit board structures before assembly. The alignment protrusions are molded or formed during switch pad manufacturing, and the alignment apertures are prepared during circuit board fabrication, allowing for rapid assembly without requiring multiple separate alignment operations or adjustments during the assembly 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
This approach significantly reduces assembly time and improves quality control by ensuring accurate alignment and seating of alignment features, thereby enhancing the reliability of the electrical connections between switch pads and circuit boards.
Implementation Method 1
generating a pressure difference between the first side of the second component and a second side of the second component at least proximate to the at least one alignment aperture thereby fully seating the flexible alignment feature relative to and the alignment aperture
Implementation Method 2
using a holder and a vacuum source to facilitate the assembly process
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 2C~2D
AI summary
Methods and apparatuses are disclosed for assembling a first component, such as a switch pad, to a second component, such as a circuit board.