Removable Strap Button With Threaded Connector And Rubber Washer
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Solution Overview
Problem
Existing strap button and connector systems for musical instruments fail to provide a reliable, easy-to-use, and secure attachment that allows for movement and quick engagement/disengagement, often leading to strap slippage during play.
Innovation Solution
A strap button and connector system featuring a large diameter head with a smaller diameter neck for movability, an internally threaded connector for secure engagement, and a rubber washer for a positive lock, allowing easy engagement and disengagement while preventing strap slippage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional strap button and connector system is used, then the strap can be attached to the instrument, but the connection is not secure and allows strap slippage during play
Solution Approach 1:
The strap button is divided into two distinct segments: a large diameter head portion for securing the strap and a smaller diameter neck portion for insertion through the instrument body hole. This segmentation allows each part to perform its specific function optimally - the head provides secure strap attachment while the neck enables precise positioning and movement.
Solution Approach 2:
The strap button neck is threaded into the connector opening, creating a nested arrangement where the smaller neck portion fits within the larger connector opening. This nesting provides a positive lock mechanism that prevents strap slippage while maintaining ease of engagement and disengagement.
2Reliability
If the strap button head is made large to prevent strap coming off, then strap security is improved, but the movability between strap and instrument is reduced
Solution Approach 1:
The strap button is segmented into a large head portion for strap security and a smaller neck portion for movability. The large head prevents strap coming off during play, while the smaller neck allows the button to move freely through the connector opening, maintaining the desired mobility between strap and instrument.
Solution Approach 2:
Different portions of the strap button have different diameters - the head has a large diameter for security while the neck has a smaller diameter for movability. This local variation in geometry allows each region to optimize its function without compromising the other.
3Manufacturing precision
If the connector opening is made small for precise engagement, then connection precision is improved, but the ease of engagement and disengagement is reduced
Solution Approach 1:
The connector opening is designed with a specific geometry that accommodates the strap button neck while providing guidance for precise engagement. The opening shape and position are optimized to ensure accurate alignment during attachment while allowing easy manual operation.
Solution Approach 2:
The strap button neck acts as an intermediary element that bridges the gap between the strap button head and the connector opening. Its specific dimensions and geometry facilitate both precise engagement with the opening and easy manual manipulation during attachment and disengagement.
Data Source
AI summary
A strap button and connector for connecting one end of a strap to a musical instrument or other body consists of a connector fixed to the instrument and a removable strap button to hold a strap securely. The connector has a large opening or mouth and is designed so that the strap button and the connector be easily engaged or disengaged. When the threaded neck of strap button is received into threaded connector cavity the strap button is easily hand screwed together and the additional aid of a rubber washer placed between strap button neck and connector head or lip keeps the two parts from disengaging. The strap at this point is secure from coming off the strap button and the strap still has movability between player and instrument.