Foldable Chair Rotating and Rocking Structure to Reduce Resistance
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Solution Overview
Problem
Existing foldable chairs struggle to integrate both rotating and rocking functions, often featuring large resistance and displacement during rocking, which affects user comfort and experience.
Innovation Solution
A rotating and rocking structure with a base and upper assembly pivotally mounted on rotating shafts, incorporating front and rear rocking elements with limiting and buffer portions, and elastic pieces to enhance flexibility and safety during rocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a deflection mechanism is used for rocking, then the rocking function is achieved, but large resistance occurs during rocking and comfort is greatly reduced
Solution Approach 1:
The rocking assembly is divided into multiple independent rocking elements (front rocking element and rear rocking element) that can move relative to each other and to the base. This segmentation allows each element to rock independently with minimal interference, reducing overall resistance and improving rocking smoothness
Solution Approach 2:
The patent uses multiple rotating shafts (first rotating shaft, second rotating shaft, third rotating shaft, fourth rotating shaft) that allow dynamic movement between rocking elements and the base. This dynamic configuration enables smooth rocking motion while reducing resistance compared to rigid deflection mechanisms
2Reliability
If a deflection mechanism is used for rocking, then the rocking function is achieved, but displacement or getting stuck occurs during rocking
Solution Approach 1:
Limiting portions are provided on both the rocking elements and the base to beforehand define and limit the rocking range. This prevents displacement or getting stuck by ensuring smooth guidance throughout the rocking motion, maintaining both stability and continuity
Solution Approach 2:
Rotating shafts serve as intermediaries between the rocking elements and the base, enabling smooth relative movement. These shafts act as mediators that prevent direct contact and potential sticking between moving parts, ensuring continuous rocking motion
3Adaptability or versatility
If both rotating and rocking functions are integrated, then functional versatility is improved, but structural complexity increases
Solution Approach 1:
The rocking assembly serves multiple functions: it enables rocking motion through the rocking elements, provides rotating function through the rotating shafts, and includes limiting portions for stability. This multi-functionality integrates rotating and rocking capabilities in a single assembly without requiring separate mechanisms
Solution Approach 2:
The patent merges the rotating and rocking functions into a single integrated rocking assembly. The upper assembly, base, and rocking elements work together as a unified structure, reducing overall system complexity compared to having separate rotating and rocking mechanisms
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 structure allows for smooth, flexible rocking with reduced interference and improved comfort by limiting pivoting angles and using elastic elements to facilitate continuous motion.
Implementation Method 1
the base is pivotally mounted on one or more rotating shafts at one or a plurality of ends of the rocking assembly, and the upper assembly is pivotally mounted on one or more rotating shafts at one or a plurality of ends of the rocking assembly
Data Source
AI summary
A rotating and rocking structure and a foldable chair having the structure are provided. The rotating and rocking structure includes an upper assembly, a base, and a rocking assembly, where the base is pivotally mounted on one or more rotating shafts at one or a plurality of ends of the rocking assembly, and the upper assembly is pivotally mounted on one or more rotating shafts at one or a plurality of ends of the rocking assembly. The rotating and rocking structure adopts the rocking assembly, and the upper assembly and the base are respectively installed at the two ends of the rocking assembly. The upper assembly can rock relative to the base, thereby realizing the rocking function. The rocking assembly includes a front rocking element and a rear rocking element respectively installed at the front and rear ends of the base and the upper assembly.