Interlocking Clasp with Hook and Recess Geometry for Flexible Bands
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Solution Overview
Problem
Flexible bands, such as wrist straps, often have insecure connecting ends that can be accidentally or intentionally dismantled, compromising their integrity and security.
Innovation Solution
A clasp system featuring interlocking members with hooks and recesses that permanently secure the ends of flexible bands, preventing slippage and disengagement, utilizing identical pieces that interlock to form a secure closure without the need for tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If adhesive portions or unsecure interlocking features are used to attach flexible bands, then the bands can be easily applied and removed, but the connecting ends become vulnerable to accidental or intentional dismantling
Solution Approach 1:
The clasp is divided into two separate interlocking members that can be independently applied to the band ends, then joined together to form a secure connection. This segmentation allows easy application while creating a reliable interlocked structure that resists dismantling.
Solution Approach 2:
The interlocking members feature asymmetric hook and recess geometries that enable easy insertion in one direction but prevent removal without proper manipulation. The hooks have specific orientations and the recesses are shaped to guide assembly while blocking disassembly, resolving the contradiction between ease of application and security.
2Device complexity
If simple interlocking features are used to secure flexible bands, then the device remains simple and easy to use, but the connection can be easily compromised
Solution Approach 1:
The interlocking members combine multiple functional elements (hooks, recesses, compression features) into unified components made from suitable materials. This composite approach maintains structural simplicity while achieving high reliability through the integrated design of interlocking and compression functions.
Solution Approach 2:
The clasp merges the functions of connection and compression into a single interlocking mechanism. The hooks not only join the band ends but also compress the seam area, combining multiple security functions in one simple structure that resists both separation and tampering.
3Reliability
If secure interlocking mechanisms are implemented to prevent disengagement, then the reliability improves, but the ease of operation may be reduced
Solution Approach 1:
The clasp design inverts the traditional approach by making application easy through guided insertion of hooks into recesses, while removal requires specific manipulation of the interlocked structure. The geometry is designed so that assembly follows the path of least resistance, while disassembly requires overcoming the interlocking geometry, thus achieving high reliability without sacrificing application ease.
Data Source
AI summary
A clasp is configured to permanently interlock around a flexible strip of material and includes first and second interlocking members. Each interlocking member includes two hooks and two recesses. Each of the hooks of the first side are arranged to engage and interlock with one of the recesses of the second side and each of the hooks of the second side are arranged to interlock with one of the recesses of the first side, so as to prevent movement between the interlocking members when interlocked.