Interlocking Groove Protuberance Bracelet Fastening
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Solution Overview
Problem
Existing bracelet fastening systems for flexible synthetic materials are often heavy, uncomfortable, and lack continuous adjustment, with buckles and deployant clasps being thick and aesthetically unpleasing, while alternative magnetic or clip systems are cumbersome and costly to manufacture.
Innovation Solution
A bracelet design featuring two strands with interlocking longitudinal grooves and protuberances that allow for continuous length adjustment without heavy or complex elements, using a snap-fit mechanism that is easy to use and manufacture, with adjustable friction forces for secure fitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional buckles or deployant clasps are used, then the bracelet can be fastened securely, but the bracelet becomes thick and aesthetically unpleasing
Solution Approach 1:
The fastening system is divided into two separate strands, each with its own groove or protuberance pattern. This segmentation allows the fastening function to be distributed along the length of the bracelet rather than concentrated in a single bulky clasp, reducing overall thickness while maintaining security
Solution Approach 2:
The fastening mechanism transitions from a traditional face-to-face clasp connection to an interlocking system where grooves and protuberances extend along the longitudinal dimension of the bracelet strands. This dimensional shift allows for secure fastening without increasing bracelet thickness
2Reliability
If traditional buckles or deployant clasps are used, then the bracelet can be fastened securely, but the bracelet becomes heavy and uncomfortable
Solution Approach 1:
By dividing the fastening function into distributed grooves and protuberances along the bracelet strands, the system eliminates the need for heavy traditional clasps, significantly reducing overall bracelet weight while maintaining secure fastening through the interlocking mechanism
Solution Approach 2:
The traditional mechanical clasp system is replaced with a simplified interlocking groove-protuberance mechanism that uses friction and geometric interlocking rather than heavy springs, latches, or magnetic assemblies, reducing weight while maintaining fastening reliability
3Adaptability or versatility
If traditional buckles are used, then the bracelet can be fastened, but the length adjustment is non-continuous and cannot be properly adjusted to the diameter of the wearer's wrist
Solution Approach 1:
The fastening system allows the bracelet length to be dynamically adjusted to any position along the strand by varying the overlap distance between grooves and protuberances, enabling continuous adaptation to different wrist diameters rather than fixed discrete positions
Solution Approach 2:
The system enables continuous variation of the effective bracelet length parameter by changing the overlap distance between the two strands, allowing precise adjustment to match any wrist diameter rather than being limited to predetermined hole positions
4Adaptability or versatility
If magnetic or clip fastenings are used to allow continuous adjustment, then the length can be flexibly adjusted, but the bracelet becomes heavy and difficult to use
Solution Approach 1:
Magnetic or clip-based fastening systems are replaced with a simple geometric interlocking groove-protuberance mechanism that relies on friction and shape complementarity rather than magnets or complex clips, eliminating the weight and operational difficulty while preserving continuous adjustability
5Adaptability or versatility
If magnetic or clip fastenings are used to allow continuous adjustment, then the length can be flexibly adjusted, but the manufacturing becomes complex and expensive
Solution Approach 1:
The fastening features (grooves and protuberances) are merged directly into the bracelet strand structure itself rather than being separate components, allowing the entire bracelet to be manufactured as a single piece using conventional molding or extrusion processes, simplifying manufacturing while enabling continuous adjustment
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 solution provides a lightweight, comfortable, and aesthetically pleasing continuously adjustable bracelet that is simple to use and manufacture, eliminating the need for bulky clasps and maintaining cleanliness, while allowing for easy length adjustment to fit various wrist diameters.
Implementation Method 1
The material and the shape of the groove and of the protuberance are configured such that these two elements interlock under pressure exerted by the bracelet user
Implementation Method 2
The material and the shape of the groove and of the protuberance are configured such that these two elements interlock under pressure
Data Source
AI summary
A bracelet including two strands provided with a fastening system which includes at least one longitudinal groove on one of the two strands and at least one longitudinal protuberance on the other strand. The material and the shape of the groove and of the protuberance are configured such that these two elements interlock under pressure exerted by the bracelet user, over two overlapping portions of the bracelet strands. The connection between the strands can easily be separated, preferably by peeling the upper strand away from the lower strand. The bracelet is continuously adjustable in length, without requiring heavy or complex elements.