Cord Attachment Device with Reinforced Sew Tab and Bulbous Receiver
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Solution Overview
Problem
Existing methods for attaching cords, straps, or ropes to bags and garments are insecure, prone to wear and fraying, and difficult to manufacture and repair, often resulting in detachment and manufacturing inefficiencies.
Innovation Solution
A cord attachment device with a bulbous receiver and sew tab, featuring ribs and cleats for secure stitching and easy replacement, allowing for secure attachment and replacement of cords after the manufacturing process is complete.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If direct stitching is used to attach narrow cords to structures, then the attachment process is simple, but the attachment security is poor and prone to wear and fraying
Solution Approach 1:
The patent introduces an intermediate attachment device with a loop and reinforced stitching area that mediates between the narrow cord and the structure. The cord passes through the loop rather than being directly stitched to the structure, distributing stress and preventing wear on the narrow cord while maintaining simple attachment to the structure.
2Productivity
If cords are attached early in manufacturing, then manufacturing efficiency is improved, but handling becomes difficult and cords are easily damaged
Solution Approach 1:
The attachment device is segmented into separate components: the loop structure attached to the structure, and the cord that passes through it. This allows the attachment device to be manufactured and attached early in the manufacturing process, while the cord can be inserted later, avoiding handling difficulties during early manufacturing stages.
3Ease of repair
If narrow cords are directly stitched, then the attachment structure is simple, but repair and replacement are difficult and cumbersome
Solution Approach 1:
The intermediate attachment device with its loop structure serves as a mediator that remains permanently attached to the structure, while the cord can be easily removed and replaced by simply passing it through the loop. This separates the permanent attachment component from the replaceable cord, making repair straightforward without requiring access to the structure's interior or complex disassembly.
Data Source
AI summary
A cord attachment device is provided for sewing into a garment, bag or other structure and includes a receiver for holding an end of a cord therein. A sew tab has ribs for strengthening and is stitched into the structure. The receiver has a limited opening through which a knot of a cord cannot be pulled and a plurality of cleats on an inner surface for holding the cord.