Static Friction Securing Mechanism for Thin Flexible Materials
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Solution Overview
Problem
Existing solutions for securing thin flexible materials, such as waste bags, often rely on rigid receptacles or hooks that may not provide sufficient static friction to prevent shearing, especially under load or when handling heavy items.
Innovation Solution
An apparatus comprising a first securing member with an outer circumference and a second securing member with an inner circumference, where the inner circumference is slightly smaller, creating static friction to immobilize the flexible material without shearing, and a backing support for additional stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If rigid receptacles or hooks are used to hold flexible materials, then the structure provides support, but static friction is insufficient and shearing occurs under load
Solution Approach 1:
The holding device is divided into two separate members: a first securing member with an outer circumference and a second securing member with an inner circumference. This segmentation allows each member to contribute differently to the friction mechanism, with the first member providing outer surface friction and the second member providing inner surface friction, together preventing shearing of the flexible material
Solution Approach 2:
The invention changes the friction parameter by creating a friction pair with matched circumferences. The second securing member's inner circumference is designed to be about the same size or slightly smaller than the first securing member's outer circumference, optimizing the contact surface area and friction force to reliably prevent shearing under load
2Reliability
If the inner circumference is made smaller than the outer circumference, then static friction increases, but the fit becomes tighter
Solution Approach 1:
The second securing member's inner circumference is made slightly smaller than the first member's outer circumference, creating a partial interference fit. This slight size difference generates sufficient static friction to prevent shearing while maintaining ease of installation and removal of the flexible material
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The apparatus effectively secures flexible materials by generating static friction between the members, preventing shearing and maintaining stability even under heavy loads, such as 15 lbs in the case of a plastic bag.
Implementation Method 1
the second member positioned upon the first member creates static friction between the outer circumference and the inner circumference
Implementation Method 2
Static friction between the first outer circumference and the second inner circumference secures and immobilizes the thin flexible material
Data Source
AI summary
An apparatus for securely holding a flexible material has a first securing member has a first outer circumference and a first shape, and a second securing member having a second inner circumference and a second shape Wherein the second inner circumference is about the same size, or slightly smaller than, the first member's first outer circumference, such that the second member positioned upon the first member creates static friction between the first outer circumference and the second inner circumference. The apparatus has a backing support that is in physical connection with, or incorporated as part of, either the first member or the second member. A thin flexible material, such as a plastic waste bag, placed between the first member and the second member is secured by positioning the first member and second member together, the positioning and static friction not shearing the flexible material. The static friction between the first outer circumference and the second inner circumference secures and immobilizes the thin flexible material contained within.