Watch Casing Ring Rigid Integration Shock Reduction
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Solution Overview
Problem
Existing watch casing solutions amplify shock transmission from the case to the movement, leading to increased acceleration during impacts, and current methods to enhance shock resistance focus on making the case-band movement connection elastic and using polymers to absorb energy, which is not effective.
Innovation Solution
A rigid casing watch design that combines axial and radial tightening using a casing ring with a non-zero angle internal and external circumferential faces, and a screwed tightening element to induce pressure on the casing ring and movement, increasing the rigidity of the socket and reducing acceleration during impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional flanged fitting or casing circle solutions are used, then the movement can be secured in the case, but the shock from the case to the movement is amplified by a factor of 2.5
Solution Approach 1:
Instead of softening the connection between case and movement using elastomers or dampers, the invention inverts the approach by creating a rigid, monoblock integration where the case and movement form a single solid structure, eliminating shock amplification through structural unity rather than compliance
Solution Approach 2:
The invention merges the case and movement into a single monoblock structure, eliminating the traditional separate components and their interfaces. This consolidation removes the shock amplification mechanism that exists in conventional multi-component assemblies
2Reliability
If elastomer rings or dampers are inserted to reduce shock transmission, then shock absorption improves, but the volume required in the case increases
Solution Approach 1:
The invention extracts and eliminates the need for separate shock-absorbing components like elastomer rings and dampers. By achieving shock resistance through rigid monoblock construction, the solution removes these additional volume-consuming elements while maintaining or improving protection
Solution Approach 2:
The invention changes the fundamental parameter of connection rigidity from flexible/compliant to rigid/monoblock. This parameter change eliminates the need for additional shock-absorbing materials and their associated volume requirements
3Ease of manufacture
If screws, collar screws, or flanges are used to secure the movement, then the movement can be fixed in the case, but these elements break following severe shocks
Solution Approach 1:
The invention merges previously separate components (case, movement, and securing elements) into a single monoblock structure. This eliminates screws, flanges, and collar screws that are prone to breaking under shock, while the integrated structure maintains ease of manufacture through modern monoblock fabrication techniques
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 solution reduces the acceleration of the movement by 60% compared to conventional flanged fittings, eliminates the risk of collision between the movement and case middle, and enhances shock resistance by eliminating breakable casing elements, while providing greater reliability and nesting stability.
Implementation Method 1
a screwed tightening element designed to exert pressure on the casing ring or the movement, so as to induce radial and axial tightening of the movement
Implementation Method 2
this solution reduces the acceleration of the movement by 60% compared to conventional flanged fittings... an elimination of the risk of collision between movement and case middle during a shock
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to a watch with a rigid casing-up: comprising: a middle (1); a bottom (2); a movement (3, 3bis, 3ter, 3quater, 41); and a casing-up ring (4, 4bis, 4ter, 42) in contact with the middle (1). The casing-up ring (4, 4bis, 4ter, 42 ) has an inner peripheral face (8, 17) and the movement (3, 3bis, 3ter, 3quater, 41) is secured to an outer peripheral face (7, 13, 18, 18bis), said inner (8,17) and outer (7, 13, 1, 18bis) peripheral faces being in contact with each other in the Z and Z' regions thereof. Said watch is characterised in that it also comprises a tightening element (5, 5bis) provided for exerting pressure on the casing-up ring (4, 4bis, 4ter, 42) or the movement (3quater). The invention also relates to a method for casing-up such a watch.