Grooved Bar Snap Hook for Watch Strands
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Solution Overview
Problem
Existing fastening mechanisms for portable timepieces and jewelry often compromise security or protection when attempting to ensure easy removal, leading to potential damage from friction or scratching.
Innovation Solution
A structure featuring a set of horns with a grooved bar that removably receives a carabiner with an elastic latch, limiting lateral and angular movement to prevent extraction without user manipulation, ensuring secure attachment while allowing easy removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional fastening mechanism is used to allow easy removal, then ease of operation is improved, but security and protection against accidental detachment deteriorate
Solution Approach 1:
The fastening mechanism transitions from a static connection to a dynamic one where the bar can be inserted easily but removal requires specific user manipulation. The elastic tab provides dynamic response to insertion force while maintaining secure holding under normal conditions.
Solution Approach 2:
Different regions of the bar have different properties: the main body provides structural strength and positioning, while the insertion end has specific geometric features (grooves, chamfers) that enable easy insertion. The elastic tab provides localized flexibility for insertion while maintaining overall security.
2Reliability
If a secure fastening mechanism is used to prevent accidental detachment, then reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The fastening system is divided into distinct functional elements: the bar with positioning grooves, the elastic tab for secure holding, and the bead for user manipulation. Each segment performs a specific function that contributes to overall security while maintaining ease of operation.
Solution Approach 2:
The elastic tab automatically secures the bar upon insertion without requiring additional user action. The mechanism self-locks through the elastic deformation of the tab, providing secure fastening immediately after simple insertion.
3Stability of the object's composition
If the bar is made fixed and rigid to ensure stability, then stability is improved, but adaptability to different attachment conditions deteriorates
Solution Approach 1:
The bar's effective parameters change based on attachment conditions. The positioning grooves allow the bar to accommodate different lateral positions and angles, while the elastic tab adjusts its deformation to match different insertion forces and orientations.
Solution Approach 2:
The bar provides stability in its primary longitudinal axis while allowing freedom in lateral and angular dimensions through the positioning grooves. This creates conditional stability that adapts to different attachment geometries.
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 provides enhanced protection and security for timepieces and jewelry by preventing accidental detachment and damage, while allowing for easy adjustment and use in various conditions, including extreme environments.
Implementation Method 1
an elastic tab or one elastically fixed to said hook and defining with it an eye, and arranged to allow the insertion of said first bar into said eye of said snap hook by pressure in a plane substantially perpendicular to the axis of said first bar, and to prohibit its removal from said carabiner in the absence of manipulation by a user
Implementation Method 2
The bar has, at a distance from each of the first attachment points to the structure, a groove having two flanks, which are arranged to limit the lateral travel of the beak, and to limit the angular travel of the carabiner relative to the bar
Data Source
Figure 1~4
Figure 5~8
Figure 9~12
AI summary
A watch or jewelry component (2000) comprising a structure (1000) with a set of lugs (1500; 1600) carrying a bar (10; 60) receiving a removable snap hook (20) attached to a strand (40), which bar (10; 60) has, at a distance from each of the attachment points (1100; 1200) to the set of lugs (1500; 1600), a groove (11) having two sides (12; 13) limiting the lateral travel of a beak (22) of the snap hook (20), and limiting the angular travel of the snap hook (20) relative to the bar (10), so as to prevent any contact between the snap hook (20) and this set of lugs (1500; 1600) to which said bar (10; 60) is attached.