Chair supporting structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing chair designs face issues with the connection between metal chair bottoms and plastic legs, leading to instability, increased replacement costs, and reduced lifetimes due to crushing of plastic components, which limits the advantages of plastic moldability and increases waste.
Innovation Solution
A chair supporting structure featuring a base frame with downwardly inclined connecting arms and legs with insertion holes, combined using threaded connecting units that securely engage with inner threads, allowing for easy assembly and DIY updates, reducing waste and extending chair lifetime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If threaded parts are used to connect metal chair bottoms and plastic legs, then the connection strength is improved, but the plastic legs are crushed causing loosening and failure
Solution Approach 1:
The connecting unit is divided into three distinct parts: a metal connecting body, a plastic connecting sleeve, and a separate fastening mechanism. This segmentation allows each component to perform its specialized function - the metal body provides structural strength, the plastic sleeve distributes pressure, and the fastening mechanism secures the connection without crushing the plastic leg.
Solution Approach 2:
The connecting unit combines metal and plastic materials in a composite structure where the metal connecting body and plastic connecting sleeve work together. This composite design leverages the high strength of metal and the moldability and pressure distribution capabilities of plastic, creating a connection that is both strong and reliable without crushing the plastic leg.
2Adaptability or versatility
If synthetic material assemblies are used to combine with chairs, then shapeability and artistic performance are improved, but the combination explodes due to crushing of plastics reducing lifetime
Solution Approach 1:
The connecting unit segments the connection function into distinct metal and plastic components that interact through a controlled interface. The plastic connecting sleeve is designed to receive the metal connecting body without being crushed, maintaining both the shapeability advantages of plastic and the structural integrity needed for long-term use.
Solution Approach 2:
The plastic connecting sleeve acts as an intermediary between the metal base frame and the plastic leg. It mediates the connection by receiving the metal component and fastening to the plastic leg through a mechanism that distributes pressure, preventing crushing while maintaining the artistic shapeability of the plastic components.
3Ease of manufacture
If traditional connection methods are used, then assembly is simple, but replacement of entire legs is required when connecting parts fail increasing waste
Solution Approach 1:
The connecting unit is designed as a separable assembly with distinct components (metal connecting body, plastic connecting sleeve, and fastening mechanism) that can be independently replaced. When the connection fails, only the connecting unit needs to be replaced rather than the entire leg, maintaining assembly simplicity while significantly reducing material waste.
Solution Approach 2:
The modular connecting unit allows for selective replacement of only the failed connection components while retaining the functional metal base frame and plastic leg. This enables recovery and continued use of the majority of the chair structure, minimizing material waste while maintaining ease of replacement.
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 a stable, easily assembled chair structure with reduced material and transportation costs, enabling users to update connecting units rather than replacing entire legs, thus prolonging chair life and minimizing waste while maintaining stability and design flexibility.
Implementation Method 1
an upper end of the combining unit being formed with a combining hole which has inner threads; so that the outer threads of each combining arm being threadly engaged with the inner threads of the combining hole of the combining unit
Data Source
AI summary
A chair supporting structure comprises a base frame having a plurality of connecting arms which is downwardly inclined; a lower distal end of each connecting arm being formed with outer threads for combining with the connecting units; a plurality of legs being installed at a bottom of the a seat of a chair; an upper end of each leg being formed with an insertion hole; and a plurality of combining units for combining the base frame and let set; an upper end of the combining unit being formed with a combining hole which has inner threads; so that the outer threads of each combining arm being threadly engaged with the inner threads of the combining hole of the combining unit; a lower end of the combining unit being tightly engaged to the insertion hole so that the base frame is combined with the legs.