Highly stable seat chassis
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Solution Overview
Problem
Existing five-star foot chair legs suffer from abrasion and looseness over time due to embedded snap-in structures, leading to instability and unrepairable issues.
Innovation Solution
A highly stable seat chassis design featuring a chair leg main body with outstretching arms, a disassembly system with eccentric holes and cone-head bolts, and integrally formed shell structures with reinforcing ribs, which reduces packaging volume and prevents looseness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an embedded snap-in structure is used for chair legs, then the initial assembly is simple and compact, but over time abrasion and gaps occur causing looseness and instability
Solution Approach 1:
The connecting hole is designed as an eccentric hole rather than a centered hole, allowing the mounting bolt to be positioned offset from the center. This enables dynamic adjustment of the connection position to compensate for wear and gaps that develop over time, maintaining stable connection between the extension arm and chair leg main body throughout the product lifecycle
Solution Approach 2:
The patent changes the geometric parameter of the connecting hole from a standard centered hole to an eccentric hole with specific offset dimensions. This parameter change allows the mounting system to accommodate wear by shifting the effective connection point, thereby maintaining reliability while preserving the simple snap-in assembly method
2Reliability
If a disassembly system with eccentric holes and cone-head bolts is used, then stability and repairability are improved, but device complexity increases
Solution Approach 1:
The chair leg structure is segmented into modular components (extension arm, chair leg main body, dismounting arm, insert plate) with standardized connecting interfaces. The eccentric connecting holes and cone-head bolts create a repeatable connection pattern that, while slightly more complex than a simple snap-fit, provides durable and repairable connections without excessive complexity
Solution Approach 2:
The disassembly system allows worn or damaged components to be easily removed and replaced. The eccentric hole design with cone-head bolts enables components to be recovered, refurbished, or replaced without affecting other parts, improving repairability while maintaining reasonable structural complexity through standardized interfaces
3Strength
If integrally formed shell structures with reinforcing ribs are used, then strength and stability are enhanced, but manufacturing complexity and packaging volume increase
Solution Approach 1:
Multiple components (chair leg main body, extension arms, reinforcing ribs) are integrally formed as a single piece rather than being assembled from separate parts. This merging reduces the number of separate components that need packaging, reducing overall packaging volume while maintaining structural strength through the integrated shell structure with built-in reinforcing ribs
Data Source
AI summary
The patent application discloses a highly stable seat chassis. The highly stable seat chassis may comprise a chair leg main body having a plurality of outstretching arms extending in a circumferential direction. The outstretching arms may comprise at least one first fixed arm, and a disassembly system. The disassembly system may be provided on the first fixed arm. The disassembly system comprises a dismounting arm and an insert plate fixedly connected to the dismounting arm. The first fixed arm is provided with a slot. The insert plate and the slot are provided with matching connecting holes.