Timepiece Component Multi-Layer Coating for Antique Appearance
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Solution Overview
Problem
Existing timepiece components are resistant to scratches but lack the ability to change appearance over time, failing to provide an antique or used look.
Innovation Solution
A timepiece component comprising a base member with a first layer of titanium nitride and a second layer of titanium oxide, where the second layer has lower hardness than the first layer, allowing it to be scratched or peeled off during use, revealing the underlying first layer and changing the appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hard coating film is formed on the base member to resist scratches, then resistance to scratches is improved, but the ability to change appearance during use deteriorates
Solution Approach 1:
The coating is divided into multiple layers with different hardness values. The first coating layer has a first hardness value and the second coating layer has a second hardness value lower than the first. This segmentation allows the harder first layer to provide scratch resistance while the softer second layer can be gradually worn to reveal the base member or first layer, enabling appearance change during use.
Solution Approach 2:
Different regions of the coating structure have different hardness properties. The first coating layer is harder to provide durability and scratch resistance, while the second coating layer is softer to enable gradual wear and appearance transformation. This local differentiation of material properties resolves the contradiction between durability and appearance evolution.
2Reliability
If a single hard coating layer is applied to maintain new appearance, then scratch resistance is improved, but the antique or used appearance effect deteriorates
Solution Approach 1:
The coating structure is designed to be dynamic rather than static. The softer second coating layer gradually wears away during use, dynamically transforming the appearance from new to antique or used look. This dynamic wear process allows the coating to evolve over time while maintaining initial scratch resistance through the harder first layer.
Solution Approach 2:
The gradual wear of the second coating layer provides continuous appearance evolution over time. The softer second layer continuously wears away to reveal the harder first layer or the base member, creating a continuous transformation from new to antique appearance while the harder layer continuously provides scratch protection.
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 enables the timepiece to develop an antique or used appearance over time as the softer second layer is gradually scraped, enhancing the aesthetic experience.
Implementation Method 1
a first layer provided at the base member, and a second layer provided at the first layer... The second layer has lower hardness than the first layer
Data Source
AI summary
A timepiece component includes a base member, a first layer provided at the base member, and a second layer provided at the first layer. The second layer has lower hardness than the first layer.