Bracelet Length Adjustment Device With Integrated Clasp Locking
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Solution Overview
Problem
Existing bracelet adjustment systems with unfolding strips are complex, expensive, and aesthetically detrimental, offering limited length adjustment options and requiring specialized tools, failing to accommodate variations in wrist diameter due to temperature and activity changes.
Innovation Solution
A compact device with a base plate and adjustable link hinged via connecting rods, featuring a locking mechanism that allows precise length adjustment between two indexed positions, concealed within the bracelet, enabling user-friendly operation without tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional adjustment systems with unfolding strips are used, then length adjustment capability is provided, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the adjustment link with the clasp structure itself, making the clasp serve dual functions as both a fastening mechanism and an adjustment device. The articulation pins are integrated into the clasp components, eliminating the need for separate adjustment mechanisms and reducing overall device complexity while maintaining length adjustment capability.
Solution Approach 2:
The clasp structure is designed to perform multiple functions: fastening the bracelet and adjusting its length. The same articulation pins that enable the unfolding strips to function as a clasp also serve as anchoring points for the adjusting link, allowing a single component to fulfill multiple roles and reducing the number of parts needed.
2Ease of operation
If visible push buttons are added for adjustment, then ease of operation improves, but aesthetic appearance deteriorates
Solution Approach 1:
The patent extracts the adjustment functionality from a separate visible control mechanism and integrates it into the existing clasp structure. The adjustment is achieved by manipulating the adjusting link through the articulation pins that are already part of the clasp, eliminating the need for additional visible push buttons or controls that would compromise aesthetics.
Solution Approach 2:
The adjusting link is designed to be manipulated directly by the user through the existing articulation pin mechanism, without requiring separate control elements. The user can adjust the length by moving the adjusting link between indexed positions using the same structural components that provide the clasp function, making the system self-sufficient and aesthetically pleasing.
3Adaptability or versatility
If multiple indexed positions are provided, then adaptability improves, but device complexity increases
Solution Approach 1:
The locking mechanism is merged with the articulation pin structure itself. The indexed positions are created by the geometric arrangement of the articulation pins and the adjusting link, eliminating the need for separate locking components. The natural mechanical interaction between the pins and link provides the indexing function while maintaining structural simplicity.
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
Provides precise and comfortable fit by allowing multiple length adjustments independent of articulation pin distance, enhancing wearing comfort and reducing complexity and cost while maintaining a sleek appearance.
Implementation Method 1
The adjustable link includes a cap into which a base slides and a spring push-button mechanism to enable the link to extend to several different lengths.
Data Source
AI summary
The invention proposes a device for adjusting the length of a wristband or bracelet including a base plate and an adjusting link, the adjusting link being hinged on the base plate via at least one connecting rod which is hinged on the base plate via a main pin which is hinged on the adjusting link via a secondary pin, wherein the adjusting link is arranged so as to slide relative to the base plate, including a locking device allowing the adjusting link to catch on an anchoring element arranged on the base plate in at least two indexed longitudinal positions, respectively defining two lengths of the bracelet, characterized in that the anchoring element is arranged on the main pin.The invention also proposes a bracelet fitted with this adjustment device and a watch fitted with such a bracelet.