Strap Button Retaining Flange Design Prevents Slippage
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Solution Overview
Problem
Musical instrument straps often slip from their buttons during use, leading to instrument damage and potential injury, due to inadequate security provided by traditional strap buttons.
Innovation Solution
A strap button design featuring a large outer flange and retaining flange configuration that securely holds the strap in place, with specific geometric dimensions and shapes to prevent slippage, including integrally formed components for enhanced strength and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional strap button design is used, then the device complexity is low, but the strap security and reliability are insufficient leading to slippage
Solution Approach 1:
The strap button is divided into multiple functional segments: an inner flange for instrument contact, a lug for strap hole engagement, an outer flange for strap retention, and a retaining flange for additional security. Each segment performs a specific function to collectively prevent strap slippage while maintaining manufacturing simplicity through integral formation.
Solution Approach 2:
The design transitions from a simple cylindrical button to a multi-dimensional structure with flanges extending in different directions. The inner flange contacts the instrument surface, the lug extends perpendicular to accommodate the strap hole, the outer flange provides a retention barrier, and the retaining flange adds another dimensional barrier, creating a three-dimensional retention system.
2Reliability
If the outer flange width is increased to prevent strap slippage, then the strap security improves, but the instrument contact area may be reduced
Solution Approach 1:
The button structure is segmented into distinct functional zones: the inner flange dedicated to instrument contact with optimized contact area, and the outer flange dedicated to strap retention with larger width. This segmentation allows each component to be optimized for its specific function without compromising the other.
Solution Approach 2:
Different parts of the button have different dimensional characteristics optimized for their local function. The inner flange has a width optimized for stable instrument contact, while the outer flange has a larger width specifically for preventing strap slippage. The retaining flange provides localized additional retention at the critical strap interface zone.
Data Source
AI summary
A strap button for attaching a supporting strap to a musical instrument is disclosed. The strap button includes an inner flange, a lug, a retaining flange, and an outer flange, with the inner flange configured to directly or indirectly contact the musical instrument. The lug is adjacent to the inner flange on one end, and the retaining flange and the outer flange on the other end. The lug is configured to support a hole of a supporting strap between the outer flange and the musical instrument. The retaining flange serves as a barrier to the supporting strap from slipping off the lug.