Annular Seamless Rock Climbing Quickdraw Webbing Loop
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Solution Overview
Problem
Existing rock climbing quickdraws with sewn webbing loops are prone to seam failure under load, posing a safety risk due to concentrated stress at the seam, and are not cost-effective in production.
Innovation Solution
A seamless rock climbing quickdraw design featuring a high-strength polyester webbing with an annular shape and a winding yarn that wraps around it, secured with a stitching thread, eliminating the seam and enhancing durability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If webbing ends are abutted and sewn together to form a loop, then production cost is reduced and manufacturing is simplified, but a seam is created that concentrates stress and reduces strength and safety
Solution Approach 1:
The invention extracts and eliminates the problematic seam from the webbing loop construction. By using an annular webbing without ends that requires no sewing to form a loop, the design removes the weak point entirely while maintaining ease of production through alternative assembly methods using the annular yarn and magnetic components.
Solution Approach 2:
The invention employs composite construction by combining annular webbing with annular yarn and magnetic components to create a multi-layered assembly. This composite structure distributes stress across multiple materials and interfaces, preventing concentration at a single seam point while maintaining manufacturability.
2Ease of manufacture
If webbing ends are abutted and sewn together to form a loop, then production cost is reduced, but the seam creates concentrated stress leading to potential failure and safety risks
Solution Approach 1:
The invention extracts and eliminates the problematic seam from the webbing loop construction. By using an annular webbing without ends that requires no sewing to form a loop, the design removes the weak point entirely while maintaining ease of production through alternative assembly methods using the annular yarn and magnetic components.
Solution Approach 2:
The invention applies beforehand cushioning by using the annular yarn wrapped around the webbing assembly to distribute and cushion stresses before they can concentrate at any single point. The magnetic components also provide pre-positioned stress distribution points that prevent sudden failure.
3Strength
If a seamless design with annular yarn wrapping is used, then strength and safety are improved by eliminating seam concentration, but production complexity may increase
Solution Approach 1:
The invention merges multiple functions into the annular yarn component, which simultaneously provides structural reinforcement, stress distribution, and acts as a binding element to secure the magnetic components to the webbing. This consolidation simplifies the overall assembly process despite the seamless design.
Solution Approach 2:
The magnetic components provide self-aligning and self-securing functionality when attached to the webbing assembly. The magnetic attraction automatically positions and holds the components in place during assembly, reducing the need for complex fastening mechanisms or precise manual positioning.
Data Source
Figure 1~2
Figure 3
AI summary
A seamless webbing loop of a rock climbing quickdraw is disclosed in the disclosure, the webbing loop includes a winding yarn and a webbing. The winding yarn is an annular yarn formed by a single yarn that winds into circles or formed by a plurality of combined closed annular coils; the winding has an annular shape, and is provided with an opening on its radially inner face, where the opening is configured to receive the annular yarn, so that the annular yarn can be wrapped by the winding; and the quickdraw is sewn with a stitching thread. The annular yarn formed by winding overcomes the defect of the seam between the abutted ends of a webbing in the prior art, thus making the quickdraw more strong and safe. The disclosure has simple processes and is strong, safe and durable, and is seamless after the webbing loop is sewn.