Watch Bracelet Clasp Sliding End Link Arresting Lug
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Solution Overview
Problem
Existing watch bracelet clasps with fine adjustment mechanisms have complex constructions due to the need to conceal arresting means, making them difficult to disassemble for maintenance or replacement.
Innovation Solution
A simplified watch bracelet clasp design featuring a sliding end link with an invisible arresting lug and reduced frictional contact surface via skids, allowing easy adjustment and maintenance without visible screws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the clasp is fitted with an arresting means to prevent removal of the end link, then the connection between clasp cover and bracelet strand cannot be disassembled without destroying the link, but the construction becomes relatively complex requiring multiple screws and concealment measures
Solution Approach 1:
The arresting means is segmented into a separate lug component that is integrated into the end link structure, rather than using a complex multi-screw concealment system. This segmentation allows the arresting function to be achieved through a simple protruding lug that engages with the clasp cover, reducing overall construction complexity while maintaining reliability.
Solution Approach 2:
The arresting function is extracted as a distinct lug element from the end link body, allowing it to be independently designed and positioned. This extraction simplifies the overall construction by separating the arresting mechanism from other end link functions, eliminating the need for complex screw-based concealment systems.
2Reliability
If the end link is made non-disassemblable to ensure security, then the arresting means must be permanently fixed, but this makes maintenance and replacement impossible
Solution Approach 1:
The arresting means employs a dynamic snap-fit mechanism rather than a static permanent fixation. The lug protrudes into the clasp cover and can be inserted by pushing the end link into the cover, but once engaged, it cannot be removed without destroying the link. This dynamic insertion process provides permanent fixation during normal use while allowing controlled insertion for maintenance purposes.
3Reliability
If the lug is made visible on the external surface, then the arresting means is functional, but it requires additional concealment measures with screws and caps
Solution Approach 1:
The lug is positioned on the internal surface of the end link rather than the external surface, changing its local spatial quality. This internal positioning allows the arresting means to remain fully functional while being naturally concealed within the clasp structure, eliminating the need for additional screws and caps for concealment.
Solution Approach 2:
The lug is relocated from an external surface position to an internal surface position within the end link structure. This dimensional relocation moves the arresting means from a visible external feature to an internal feature that is naturally concealed, eliminating the need for additional concealment mechanisms while maintaining full functionality.
Data Source
AI summary
Clasp comprising a cover connected to a first bracelet strand and to a second bracelet strand, a connecting means being inserted between the second bracelet strand and the cover of the clasp, the connecting means comprising an end link sliding between a first position in which it is engaged in the cover of the clasp, and a second position in which it is outside the cover of the clasp, the end link comprising a push-button which causes a toothed element to change from a first position, in which the toothed element is in mesh with a rack toothing, to a second position, in which the toothed element is released, the end link being provided with an arresting means preventing the removal of the end link from the cover of the clasp, the arresting means comprising at least one lug, which projects into a groove arranged in the bottom of the cover and which defines two end stop members.