Rigid Timepiece Movement Casing for Shock-Resistant Mounting

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Solution Overview

Problem

Existing casing solutions for horology movements in timepieces are complex, prone to shock amplification, and suffer from play and variability due to manufacturing tolerances, leading to potential damage and reduced shock resistance.

Innovation Solution

A rigid casing system comprising a first and second casing circle, with a clamping element, that securely holds the movement between the circles without direct contact, using a clamping element to compress the assembly against the middle's shoulder, ensuring no play and enhanced rigidity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If fastening clamps and clamp screws are used to case the movement, then the movement can be securely fastened, but the device complexity increases due to the large number of parts and handling operations

Engineering Contradiction:

Improvesecure fastening of movementVSAvoidnumber of parts and handling operations

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines multiple fastening functions into a single integrated casing ring that incorporates both the casing circle and clamping element. This merging eliminates the need for separate fastening clamps and clamp screws, reducing the number of parts while maintaining secure fastening of the movement through the integrated clamping mechanism.

Inventive Principle:

Principle #5Merging (Combining)

2Productivity

If an intermediate part such as a casing circle is used to hold the movement, then the movement can be fastened quickly, but a gap must be left between the movement and middle which limits the potential dimensions

Engineering Contradiction:

Improvespeed of fasteningVSAvoidavailable volume for movement

Core Design Contradiction:

ProductivityVSVolume of moving object

Solution Approach 1:

The patent transitions from using an intermediate casing circle that requires axial gaps to a clamping element that applies radial clamping force directly. This dimensional change allows the movement to be positioned flush against the middle without requiring clearance gaps, maximizing the available volume while maintaining quick fastening through the clamping mechanism.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Reliability

If conventional casing solutions are used, then the movement can be held in position, but shocks are transmitted and amplified to the movement causing damage or loss of connection

Engineering Contradiction:

Improvepositioning stabilityVSAvoidshock transmission and amplification

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent incorporates a shock-absorbing element between the casing ring and the movement that is pre-positioned to cushion against shock impacts. This beforehand cushioning absorbs shock energy before it reaches the movement, preventing damage and loss of connection while maintaining reliable positioning stability under normal conditions.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

4Reliability

If two superimposed casing circles are used with an annular joint, then the movement can be held axially and radially, but play varies depending on manufacturing tolerances

Engineering Contradiction:

Improveaxial and radial positioningVSAvoidplay variation due to tolerances

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent changes the geometric parameters of the clamping element to include a conical clamping surface instead of parallel surfaces. This parameter change allows the clamping force to be self-adjusting, compensating for manufacturing tolerances in the casing ring and movement. The conical geometry ensures consistent radial and axial positioning without play variation, as the clamping force automatically adapts to tolerance variations.

Inventive Principle:

Principle #35Parameter changes

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 system provides improved shock resistance, secure mounting, and ease of assembly, minimizing strain and distortions from accidental shocks while maintaining precise positioning of the horology movement.

Implementation Method 1

a clamping element, separate from the detachable back, in direct contact with the second casing circle, the clamping element being designed to compress the movement axially between the first casing circle and the second casing circle

Methodology Applied

Scientific EffectMechanical Force: Mechanical Force

Implementation Method 2

a first casing circle pressing against a shoulder formed in the middle

Methodology Applied

Scientific EffectNormal Force: Mechanical Force

Data Source

PatentUS20260064080A1Timepiece with rigid casing and casing method

Publication Date: 2026.03.05 CERTINA

AI summary

A timepiece (100) including a middle (10), a detachable back (12) mounted on the middle (10), a movement (20) and casing elements (30) for rigidly holding the movement (20) in an inner volume (15) of the middle (10), having a first casing circle (35) pressing against a shoulder (16) formed in the middle (10); a second casing circle (34), the movement (20) being rigidly held between the first casing circle (35) and the second casing element (34) via a peripheral rib (21) of the horology movement (20), the first casing circle (35) and the second casing circle (34) being superimposed with no direct contact with each other; a clamping element (33), separate from the detachable back (12), in direct contact with the second casing circle (34).