Portable Powered Appliance Support Strap with Triggered Elasticity
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Solution Overview
Problem
Portable powered appliances often experience instability and excessive bouncing when carried due to inadequate support systems, leading to discomfort and reduced control for the user.
Innovation Solution
A stretchable powered appliance support strap (PASS) is designed to be operably coupled between the shoulder strap and the portable appliance, featuring a stretcher that only stretches under a triggering load of 4.5 to 7 kg, providing enhanced weight transfer and stability while minimizing inadvertent bouncing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid support strap is used to provide stable support for the portable powered appliance, then the appliance stability is improved, but the user experiences excessive body tension and discomfort
Solution Approach 1:
The support strap incorporates a stretchable portion that changes its mechanical parameter (elasticity) to dynamically adjust between rigid and flexible states. This allows the strap to provide stable support when needed while absorbing body tension through elastic deformation, resolving the contradiction between stability and comfort.
Solution Approach 2:
The support strap is constructed as a composite system combining rigid portions (for structural stability) and a stretchable portion (for tension absorption). This composite structure enables the strap to simultaneously provide appliance stability while relieving body tension through the differential properties of its components.
2Object-affected harmful factors
If a stretchable support strap is used to relieve body tension, then user comfort is improved, but the appliance experiences excessive bouncing and instability
Solution Approach 1:
The support strap transitions from a static rigid structure to a dynamic system with a stretchable portion that can adapt its stiffness in real-time. The elastic portion dynamically absorbs vibrations and bouncing motions while maintaining overall stability, allowing the strap to respond to varying load conditions.
Solution Approach 2:
The stretchable portion acts as a pre-configured cushioning element that anticipates and absorbs bouncing forces before they transmit to the appliance. This prior cushioning capability prevents excessive bouncing while still allowing controlled stretching to relieve body tension.
3Stability of the object's composition
If the support strap is made completely rigid to prevent bouncing, then appliance stability is improved, but the strap cannot absorb weight and relieve body tension
Solution Approach 1:
The support strap is segmented into distinct functional portions: rigid portions for maintaining structural stability and preventing bouncing, and a stretchable portion for absorbing weight and relieving body tension. This segmentation allows each portion to optimize its specific function without compromising the other.
Solution Approach 2:
Different portions of the support strap have different mechanical qualities - rigid sections provide structural integrity and bounce prevention, while the localized stretchable section provides weight absorption and tension relief. This local differentiation of material properties resolves the contradiction between stability and comfort.
4Object-affected harmful factors
If the support strap is made completely flexible to absorb body tension, then user comfort is improved, but the strap cannot provide adequate support and stability
Solution Approach 1:
The support strap is divided into rigid support portions that provide necessary structural force and a flexible stretchable portion that absorbs body tension. This segmentation ensures that support force and tension absorption functions are performed by appropriately designed sections.
Solution Approach 2:
The support strap implements local quality differentiation where rigid sections provide high support force while the stretchable section provides tension absorption. This localized functional assignment resolves the contradiction between providing adequate support force and absorbing body tension.
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 PASS effectively absorbs the weight of the appliance, relieves body tension, and stabilizes the device, allowing for better control and reduced bouncing during use.
Implementation Method 1
a stretcher extending between the first portion and the second portion, wherein the stretcher does not undergo stretching until experiencing a stretch triggering load
Implementation Method 2
The stretchability of the PASS absorbs weight of the portable powered appliance and relieves body tension. At the same time, the PASS stabilizes the powered appliance to facilitate enhanced control over the powered appliance.
Data Source
AI summary
An example powered appliance support strap may include a first portion to extend from a continuous loop of a shoulder strap, a second portion to extend from a powered appliance to be manually carried by a person wearing the shoulder strap and a stretcher extending between the first portion and the second portion. The stretcher does not undergo stretching until experiencing a stretch triggering load at least 1 kg and no greater than 7 kg.