Connector Tail Slit Design for Stress Reduction
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Solution Overview
Problem
The existing connector tails for touch sensors experience stress at connection spots due to deformation, leading to potential separation from base materials.
Innovation Solution
A connector tail design with a slit of length L, branching into multiple connection portions, where the distance between these portions (H) and the angle formed (θ) are optimized such that H/L ≤ 0.07 and 3 ≤ θ ≤ 4, reducing stress and preventing separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the connector tail is deformed to connect branched leading ends to base materials, then connection is achieved, but stress remains on connection spots causing potential separation
Solution Approach 1:
The connector tail is segmented by introducing slits that divide the leading end into multiple connection portions. This segmentation allows stress to be distributed across multiple separate connection spots rather than concentrated in one area, reducing the stress burden on each individual connection while maintaining overall connection reliability.
Solution Approach 2:
The connector tail features local quality variations through differently shaped slits (straight, curved, or meandering patterns) that create specific stress distribution characteristics in different regions. The slit geometry is optimized locally to control stress flow and minimize concentration at connection spots, thereby reducing separation risk while maintaining connection integrity.
2Stress or pressure
If slits are introduced to reduce stress, then stress on connection spots is reduced, but device complexity increases
Solution Approach 1:
The invention optimizes specific geometric parameters of the slits, including the ratio of distance H between connection portions to slit length L (H/L ≤ 0.07), and the angle θ between connection portions (3° ≤ θ ≤ 4°). By controlling these parameters within specific ranges, the design achieves effective stress reduction while maintaining manufacturing feasibility and avoiding excessive complexity.
Data Source
AI summary
The objective is to reduce stress applied to a connector tail. The connector tail is configured such that a slit of length L having an opening end is formed at one end side, a leading end part is branched by the slit into at least a first connection portion and a second connection portion, and when the distance between the first connection portion and the second connection portion while the first connection portion and the second connection portion are deformed to form an angle θ is set as H, the following relationship holds:H/L≤0.07 (where the units of H and L are millimeters and θ≤4).