Watch Bezel Press With Adjustable Jaws for Multi-Size Cases

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Solution Overview

Problem

Existing watch crystal and bezel pressing tools require multiple mounting plates of different sizes, leading to storage and usage complexities during after-sales service operations.

Innovation Solution

A press with a single mounting fixture that uses a kinematically linked connecting element and adjustable jaws to accommodate various watch case sizes, allowing for quick and secure attachment of crystals or bezels without damaging the case surfaces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple mounting plates of different sizes are used to accommodate various watch case sizes, then the press can service a wide variety of watches, but the storage and usage complexity increases

Engineering Contradiction:
Improveability to service various watch case sizesVSAvoidstorage and usage complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The mounting plate is designed with a universal interface system featuring a central axis and multiple radial attachment points. Different mounting plates can be quickly exchanged on the same press by aligning them with the central axis and securing at radial points, allowing one press to service multiple watch case sizes without complex storage requirements

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The mounting plate is segmented into a standardized base structure with modular attachment points. This segmentation allows different sized plates to be systematically organized and quickly swapped by attaching to the same press interface, reducing storage complexity while maintaining versatility

Inventive Principle:
Principle #1Segmentation

2Adaptability or versatility

If multiple mounting plates are maintained for different case sizes, then all watch types can be serviced, but the time required to change plates increases

Engineering Contradiction:
Improvecoverage of different watch typesVSAvoidtime to change mounting plates
Core Design Contradiction:
Adaptability or versatilityVSLoss of time

Solution Approach 1:

Multiple mounting plates are pre-positioned on the press at easily accessible radial locations around the central axis. This preliminary arrangement allows the technician to select and attach the appropriate plate without searching or complex positioning, significantly reducing the time required to change plates while maintaining coverage for different watch types

Inventive Principle:
Principle #10Preliminary action

3Device complexity

If a single mounting plate is used for all watch case sizes, then storage and usage are simplified, but the precision and stability for specific sizes may be compromised

Engineering Contradiction:
Improvestorage and usage simplicityVSAvoidpositioning precision for pressing operation
Core Design Contradiction:
Device complexityVSManufacturing precision

Solution Approach 1:

The mounting plate features localized precision features at specific radial attachment points, with each point optimized for particular case sizes. The central axis provides universal positioning precision, while radial points offer size-specific optimization, allowing the single plate to maintain high precision across different watch case sizes without compromising stability

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

Facilitates efficient and damage-free pressing of watch crystals and bezels onto cases of varying dimensions with a single setup, reducing the need for multiple mounting plates and simplifying storage and maintenance.

Implementation Method 1

a mounting (20) comprising at least two jaws (21) arranged to move away from or towards said axis AA under the effect of a stress on an elastic element (22) arranged in said mounting (20)

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentEP4354230B1Press for press-fitting a bezel or a watch glass
Publication Date: 2026.04.22 OMEGA SA
  • EP4354230B1 patent drawingFigure 1
  • EP4354230B1 patent drawingFigure 2
  • EP4354230B1 patent drawingFigure 3

AI summary

The invention relates to a press (10) for pressing a crystal or bezel (11) into a case (12) of a watch, comprising a fixture (20) intended to hold the case (12) in position, and a bracket (30) supporting a tool holder (31) to which a tool (33) is fixed, said tool holder (31) being movable in translation and cooperating with an operating member (32) so as to slide relative to said bracket (30) along an axis AA upon activation of said operating member (32), the fixture (20) comprising at least two jaws (21) intended to cooperate with the case (12) so as to ensure its holding in position, each jaw (21) being movable in a plane P orthogonal to the axis AA.