Elastic Sealing Member Segmentation for Circuit Board Assembly
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Solution Overview
Problem
Existing electronic key terminals for vehicles face challenges in workability due to the need for manual expansion of sealing rubber protrusions when attaching circuit boards, which complicates the assembly process.
Innovation Solution
The design includes a first case with a planar portion and a second case with a planar portion in contact, an elastic member with a third planar portion and protruding walls, and an electronic board positioned between these components, allowing for easier assembly by utilizing the elastic properties of the materials to facilitate the attachment of the circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing rubber has a protruding portion over the entire circumference inside the opening portion, then the sealing performance is improved, but the workability deteriorates because it is necessary to attach the circuit board to the sealing rubber while expanding the protruding portion by hand
Solution Approach 1:
The protruding portion is divided into multiple segments (first protruding portion and second protruding portion) instead of being a continuous circumferential structure. This segmentation allows the protruding portions to be compressed and deformed more easily during assembly, improving workability while maintaining sealing performance through the distributed contact points.
Solution Approach 2:
The protruding portions are positioned at specific locations (first and second sides of the third planar portion) rather than uniformly distributed around the entire circumference. This local placement provides sufficient sealing at critical areas while reducing overall resistance to deformation, enabling easier circuit board attachment.
2Reliability
If the protruding portion is designed to provide sealing, then the sealing performance is improved, but the assembly complexity increases due to the need for manual expansion during attachment
Solution Approach 1:
By segmenting the protruding portion into discrete elements rather than a continuous structure, the assembly process is simplified. The segmented design allows the protruding portions to compress and deform more readily during automated or manual assembly, reducing the complexity of the attachment operation while maintaining sealing effectiveness.
Solution Approach 2:
The protruding portions are pre-configured in the elastic member with dimensions and positioning that enable them to deform into the required sealing configuration during assembly. This preliminary design of the protruding portions' geometry and placement allows them to automatically achieve the sealing function during the attachment process, reducing assembly complexity.
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 configuration simplifies the assembly of the circuit board to the elastic member, enhancing workability and reducing the risk of damage during the attachment process.
Implementation Method 1
an elastic member having a predetermined elastic modulus, the elastic member including: a third planar portion, at least a part of the third planar portion being disposed along the predetermined plane between the first planar portion and the second planar portion; and a wall portion protruding from at least a part of a periphery of the third planar portion in a direction from the first planar portion toward the second planar portion
Data Source
AI summary
An electronic key terminal includes a first case and a second case, an elastic member including a planar portion and a wall portion protruding from at least a part of a periphery of the planar portion in a direction from the first case toward the second case, and an electronic board housed in a space defined by the first case and the second case. The wall portion includes protruding portions protruding from opposing sides of the wall portion. The electronic board is partially disposed between the third planar portion and the protruding portions.