Vehicle Gauge Dial Face with Interference Fit Tick Mark Openings
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Solution Overview
Problem
Existing dial gauges in vehicle instrument panels face issues with misalignment and light leakage due to larger openings for tick marks, which detract from the perception of quality and aesthetic design.
Innovation Solution
The design features a dial face with openings that provide an interference fit for tick marks, ensuring alignment and preventing light leakage by having corner widths greater than tick mark thickness and middle lengths less than side lengths, with concave sides that bend to secure the tick marks, forming a secure and aesthetic assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If larger openings are used for tick marks to facilitate assembly, then ease of assembly is improved, but misalignment and light leakage occur that worsen quality perception
Solution Approach 1:
The opening is segmented into multiple regions: a first opening region with larger dimensions for insertion, and a second opening region with smaller dimensions for precise positioning. This segmentation allows the tick mark to be inserted easily through the larger first region while being precisely positioned and retained in the smaller second region, thus resolving the contradiction between ease of assembly and alignment precision.
Solution Approach 2:
The opening transitions from a two-dimensional aperture to a three-dimensional structure with varying cross-sectional dimensions along its length. The opening has larger dimensions at the entry point for easy insertion and smaller dimensions deeper within for precise fit, utilizing dimensional variation to simultaneously achieve ease of assembly and alignment precision.
2Ease of manufacture
If larger openings are used for tick marks to facilitate assembly, then ease of assembly is improved, but light leakage occurs that worsens quality perception
Solution Approach 1:
The opening is divided into a first opening region for insertion and a second opening region for light containment. The tick mark extends through both regions, with the second region providing a tighter fit that prevents light leakage while the first region facilitates easy assembly, thus resolving the contradiction between ease of assembly and light leakage prevention.
Solution Approach 2:
The opening utilizes dimensional variation along its length, with larger cross-sectional dimensions at the entry for easy insertion and smaller dimensions deeper within for light containment. This dimensional transition allows the tick mark to be easily inserted while preventing light leakage through the tighter fit in the second region.
3Manufacturing precision
If precise alignment features are implemented, then alignment precision is improved, but device complexity increases
Solution Approach 1:
The multi-region opening structure serves multiple functions simultaneously: the first opening region facilitates assembly, the second opening region provides precise alignment, and the overall structure prevents light leakage. By integrating these multiple functions into a single opening feature, the invention achieves precise alignment without proportionally increasing device complexity.
Solution Approach 2:
The invention merges the assembly facilitation function and the alignment precision function into a single integrated opening structure. The opening simultaneously provides easy insertion through its larger first region and precise positioning through its smaller second region, eliminating the need for separate alignment features and reducing overall device 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 solution ensures precise alignment and complete light containment, enhancing the visual appeal and operational clarity of vehicle instrument panels by eliminating misalignment and light leakage, thereby improving the overall quality and aesthetic design.
Implementation Method 1
The dial face is formed of a flexible material and sides of the opening bend upward responsive to receiving one of the plurality of tick marks
Data Source
AI summary
A gauge assembly includes a dial face with a scale indicative of a vehicle operating parameter. The dial face includes an opening proximate the scale and an illuminable tick mark that extends through the opening in the dial face with the tick mark being larger than the opening.