Timepiece Dial Composite with Electroplated Through-Hole Decoration

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Solution Overview

Problem

Existing timepiece dials, such as those using mother-of-pearl sheets, lack diversity in design and aesthetic appeal, leading to a monotonous appearance.

Innovation Solution

A timepiece component is manufactured by bonding a conductive base and a nonconductive base, with through-holes in the nonconductive base electrolytically plated to form decorative layers, enhancing the dial's design and aesthetic appearance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a mother-of-pearl sheet is used for the dial, then the dial has coloration and aesthetic appeal, but the design becomes monotonous and lacks variety

Engineering Contradiction:
Improveaesthetic appearanceVSAvoiddesign variety
Core Design Contradiction:
Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The dial is segmented into multiple functional layers: a base layer, a mother-of-pearl sheet layer, and a decorative layer with metallic particles. This segmentation allows each layer to contribute different aesthetic properties, enabling design variety while maintaining manufacturing efficiency. The decorative layer can be independently designed with different metallic particle patterns, colors, and densities.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The invention uses a composite structure combining a mother-of-pearl sheet with a decorative layer containing metallic particles. This composite material approach allows the dial to exhibit both the iridescent coloration of mother-of-pearl and the metallic aesthetic of the decorative layer, creating enhanced design variety without sacrificing manufacturing ease.

Inventive Principle:
Principle #40Composite materials

2Adaptability or versatility

If a decorative layer is electrolytically plated in through-holes, then design variety and aesthetic appearance are enhanced, but manufacturing complexity increases

Engineering Contradiction:
Improvedesign varietyVSAvoidmanufacturing process complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Through-holes are formed in the mother-of-pearl sheet before the decorative layer is applied. This preliminary action allows the decorative layer to be electrolytically plated directly into the pre-formed holes, simplifying the overall manufacturing process. The through-holes serve as ready-made receptacles for the metallic particles, eliminating the need for complex post-processing steps.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The invention replaces complex mechanical assembly processes with electrolytic plating. Instead of manually or mechanically placing metallic particles into holes, the decorative layer is applied through electrolytic plating, which automatically deposits metallic particles into the through-holes. This substitution significantly reduces manufacturing complexity while maintaining design flexibility.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Ease of manufacture

If the nonconductive base is perforated with through-holes, then decorative layers can be plated, but the structural integrity may be compromised

Engineering Contradiction:
Improvedecorative plating capabilityVSAvoidstructural integrity
Core Design Contradiction:
Ease of manufactureVSStrength

Solution Approach 1:

The through-holes are strategically positioned and sized to maintain local structural quality. The holes are distributed in patterns that do not concentrate stress, and their dimensions are optimized to provide sufficient structural support while allowing decorative plating. This local quality approach ensures that the mother-of-pearl sheet maintains its strength despite the presence of through-holes.

Inventive Principle:
Principle #3Local quality

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

The method allows for varied and aesthetically enhanced designs with three-dimensional effects and metallic decoration, reducing manufacturing costs and improving corrosion resistance.

Implementation Method 1

bonding a conductive base and a nonconductive base

Methodology Applied
Scientific EffectAdhesive bonding: Adhesive

Implementation Method 2

electrolytically plated with a decorative layer

Methodology Applied
Scientific EffectElectrolytic plating: Electroplating

Data Source

PatentEP4600759A1Timepiece component, timepiece, and method of manufacturing timepiece component
Publication Date: 2025.08.13 SEIKO EPSON CORP
  • EP4600759A1 patent drawingFigure 1
  • EP4600759A1 patent drawingFigure 2
  • EP4600759A1 patent drawingFigure 3A~3B

AI summary

A dial that is a timepiece component includes a conductive base and a nonconductive base bonded to the conductive base. The nonconductive base has a through-hole extending from a back surface to a front surface of the nonconductive base, with the back surface being bonded to the conductive base. The through-hole is electrolytically plated with a decorative layer. The decorative layer serving as metallic decoration is added to the nonconductive base exposed at a front surface of the dial that is a timepiece component. Thus, the timepiece component can vary widely in design and has enhanced aesthetic appearance.