Swiveling Strap Extension Device for Instrument Twist Correction
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Solution Overview
Problem
Instrument straps often twist, bind, and spiral during use, causing difficulties for operators to untwist them, especially when shouldering instruments for playing, and existing solutions fail to extend or adjust strap length while self-correcting excessive twisting.
Innovation Solution
A swiveling strap extension device with a swivel-coupling that rotates up to 360°, positioned at a fixed length between the instrument and the operator, allowing for free swiveling and self-correction of twisting, while minimizing obstructions and abrasive contact, using a longitudinal member with adjustable eyelets and a terminus section that attaches to the instrument strap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the instrument strap is connected to allow pivotal or swiveling movement, then the freedom of moving the instrument is improved, but the strap may twist, bind, and spiral causing difficulty to untwist
Solution Approach 1:
A swivel coupling is introduced as an intermediary component between the instrument strap and the instrument. This swivel coupling allows rotational movement to accommodate the freedom of moving the instrument while preventing the strap itself from twisting and binding, thus resolving the contradiction between ease of operation and reliability
Solution Approach 2:
The connection system is segmented into distinct components: the instrument strap, the swivel coupling, and the instrument mounting point. This segmentation allows the swivel coupling to independently handle rotational movements, preventing the strap from twisting while maintaining the desired freedom of movement
2Ease of operation
If the strap is made to be easily and quickly connected and disconnected, then the ease of operation is improved, but the strap may flip over and curl into a complete spiral twist
Solution Approach 1:
The swivel coupling acts as a mediator between the quickly connectable/disconnectable strap and the instrument. It prevents the strap from flipping over and curling into spirals while maintaining the ease of quick connection and disconnection through simple eyelet and button mechanisms
3Length of moving object
If the swivel-coupling is positioned close to the instrument, then the strap extension is minimized, but the swivel-coupling may have obstructions or abrasive contact with the instrument
Solution Approach 1:
The swivel coupling is positioned at an optimized distance from the instrument, utilizing the spatial dimension to create sufficient clearance. This positioning allows the swivel coupling to rotate freely without obstructions or abrasive contact with the instrument, while still maintaining a compact overall strap extension through proper spatial arrangement
Data Source
AI summary
A swiveling strap extension device and method of use is operable with an instrument strap. The extension device comprises a flat, elongated longitudinal member having an instrument end that attaches to an instrument. The instrument end has size-adjustable eyelets that fasten to the instrument at mount buttons. The swivel end has a terminus section and a body section. The terminus section attaches to a free end of the instrument strap. A swivel-coupling connects the terminus and body sections. The swivel coupling swivels up to 360°, allowing the terminus section to rotate correspondingly. The swivel-coupling is disposed at a fixed length from the instrument. The fixed length is defined as the distance from the eyelets to the terminus section of the swivel end. The fixed length enables the swivel-coupling to be disposed approximately in an open space that forms between the instrument and the back of an instrument operator.