Watch Dial Applique Assembly via Cam Mechanism

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Solution Overview

Problem

Existing dial devices for watches with complications face challenges in repeatability, reliability, and aesthetics due to complex assembly methods and limitations in decoration and integration with the dial.

Innovation Solution

A dial device featuring an applique fitted onto a dial with a secure and repeatable mechanism, utilizing elements such as feet, holes, and projections to position and secure the applique, ensuring a flush or recessed assembly without visible riveting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If counters are made integral with the dial, then manufacturing complexity is reduced, but design flexibility and decoration options are limited

Engineering Contradiction:

Improveassembly complexityVSAvoiddecoration flexibility

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The dial device is segmented into a base dial and separate applique counters that can be independently manufactured and decorated, then assembled together. This allows each component to be optimized separately while maintaining overall integration.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The applique counters are designed to fit within openings in the dial, creating a nested structure where the counters are recessed into the dial surface. This maintains a compact integrated appearance while allowing separate component fabrication.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Adaptability or versatility

If counters are made as separate appliques, then design flexibility is improved, but assembly reliability and repeatability deteriorate due to glue dosing variations

Engineering Contradiction:

Improvedecoration flexibilityVSAvoidassembly repeatability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The mechanical connection system replaces adhesive bonding with a resilient arm and cam mechanism that provides positive mechanical engagement. This eliminates variability in glue dosing while maintaining the ability to assemble separate decorated components.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The resilient arm provides a dynamic, elastic connection that allows for self-adjustment during assembly and maintains consistent contact pressure. This dynamic mechanism ensures repeatable assembly without requiring precise glue application.

Inventive Principle:

Principle #15Dynamics

3Reliability

If resilient arm assembly is used, then assembly repeatability is improved, but device complexity increases due to cam mechanism requirements

Engineering Contradiction:

Improveassembly repeatabilityVSAvoidmechanism complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The cam mechanism is extracted as a separate, manually operable component rather than being integrated into the dial structure. This simplifies the overall dial design while maintaining the reliable resilient arm connection through a standalone adjustment mechanism.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS12339625B2Timepiece dial device

Publication Date: 2025.06.24 ROLEX SA

AI summary

A dial device including at least one applique and a dial provided with an opening for receipt of the applique, the dial including at least one first element for positioning and/or securing, the at least one applique including at least one second element for positioning and/or securing cooperating with the at least one first element, the device including dial-applique interface surfaces which are arranged in the thickness of the dial.