Variable Diameter Gas Spring with Ventilation and Adjustable Elasticity
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Solution Overview
Problem
Conventional compression springs are non-adjustable, occupy large space, and suffer from poor ventilation and moisture retention, leading to health issues and high production costs, while gas springs have complex structures and limited deformation and hardness adjustment.
Innovation Solution
A diameter-variable cylindrical air pressure spring with a multilayered sidewall, hollow cavity, and vent holes for adjustable elasticity and enhanced ventilation, featuring a concave drum shape for uniform pressure distribution and easy storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional compression springs are used, then elasticity is provided, but the elasticity is fixed and non-adjustable after formation
Solution Approach 1:
The spring transitions from a static metal structure to a dynamic air-filled structure where the elasticity can be adjusted by changing the air pressure inside the cavity. The cavity body can be inflated or deflated to modify the spring constant, enabling real-time adjustment of elasticity without changing the physical structure.
Solution Approach 2:
The invention changes the physical parameter of the spring medium from solid metal to gas (air). By controlling the amount of air in the cavity, the elasticity parameter can be continuously adjusted. This allows the same structure to provide different elasticity levels by simply adding or removing air.
2Volume of moving object
If conventional compression springs are used, then elasticity is provided, but they occupy large space after being compressed
Solution Approach 1:
The invention uses pneumatic pressure (air) to generate the elastic force instead of solid metal coils. When compressed, the air in the cavity resists compression through pressure buildup, providing elasticity. This allows the spring to be much more compact when deflated or in relaxed state, as the air can be compressed to a smaller volume while still maintaining the elastic function.
3Adaptability or versatility
If gas spring with piston structure is used, then elasticity is provided, but the structure is complex and inter-part fitting requirements are high
Solution Approach 1:
The invention extracts and removes the complex piston, rod, and valve assembly from the traditional gas spring design. Instead, it uses a simple flexible cavity body that can be inflated or deflated through a single opening. This extraction of unnecessary components dramatically simplifies the structure while retaining the elasticity adjustment capability.
Solution Approach 2:
The invention uses a flexible cavity body made of thin film or flexible material that can expand and contract to provide the spring function. This flexible shell replaces the rigid piston-cylinder assembly, eliminating the need for precise inter-part fitting while maintaining the ability to adjust elasticity through volume changes.
4Length of moving object
If gas spring with piston structure is used, then elasticity is provided, but deformation stroke is limited and hardness adjustment range is small
Solution Approach 1:
The flexible cavity body can dynamically change its volume over a wide range, allowing for large deformation strokes. The cavity can be significantly inflated for large deformation or partially inflated for small deformation, providing a wide adjustment range without requiring complex mechanical linkages or multiple components.
5Volume of moving object
If conventional gas spring is used, then elasticity is provided, but it takes up large space when not in use
Solution Approach 1:
The pneumatic spring can be deflated to a very small volume when not in use, as the air can be compressed into a minimal space. The elastic function is preserved because the same cavity can be quickly re-inflated when needed. This is in contrast to metal springs that maintain their expanded coil structure regardless of whether they are under load or not.
6Object-affected harmful factors
If hollow cavity structure is used, then ventilation and moisture removal are improved, but moisture may gather and affect health
Solution Approach 1:
The cavity body is made of a porous or permeable material that allows moisture vapor to pass through the walls. This porous structure enables continuous evaporation and removal of moisture from the cavity, preventing moisture accumulation. The porosity provides ventilation pathways while the material itself maintains the structural integrity of the spring.
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 solution provides adjustable elasticity, improved ventilation, reduced moisture retention, and a wide deformation range, enhancing comfort and usability while minimizing space occupation and production complexity.
Implementation Method 1
a closed cavity containing pressure air is formed between every two layers of the sidewall
Implementation Method 2
moisture generated by human body or moisture in the environment will gather and cannot be removed through air convection
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a diameter-variable cylindrical air pressure spring. The current air pressure spring has the shortcomings of complex structure, insufficient deformation stroke and poor ventilation effect. The diameter-variable cylindrical air pressure spring comprises a spring body, the spring body is formed by at least one hollow cavity body, the sidewall of the cavity body is of a multilayered structure, a closed cavity containing pressure air is formed between every two layers of the sidewall, the cavity body is in a diameter-variable cylindrical shape with two thicker ends and a thinner middle part, and a vent hole is arranged on each cavity, the spring is hollow and therefore good in top-to-bottom air penetrability, the inflation amount of the cavity is adjusted in real-time by means of inflation or deflation via the vent hole in order to adjust the hardness (elasticity) of the air pressure spring and to enhance the comfortable level and applicable scope; after the pressure air in the cavities is eliminated and the diameter-variable cylindrical air pressure spring is compressed, the spring takes up a small space and can be coiled to facilitate package, storage and transportation; and cavity columns may be independent, or may be formed in rows or in lines, and the cavities of the cavity columns may be either independent of or communicated with each other.