Chair and frame assembly thereof
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Solution Overview
Problem
Chairs with mesh frames face manufacturing difficulties and durability issues due to various stretching methods and shapes, failing to provide adequate ergonomic support for prolonged sitting.
Innovation Solution
A frame assembly comprising a first and second frame, a sheet, and a covering member, where the sheet is fixed and bent between the frames, with protruding ribs and grooves for clamping, and a covering member to prevent separation, allowing easy assembly and enhanced support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If various mesh stretching methods and shapes are used, then ergonomic support is improved, but manufacturing difficulty and durability issues increase
Solution Approach 1:
The frame assembly is divided into a first frame and a second frame that are oppositely arranged and connected, with the sheet segmented into multiple regions (first, second, and third regions) with different functions. This segmentation allows each part to be optimized independently for both ergonomics and manufacturability.
Solution Approach 2:
The sheet undergoes controlled bending and stretching to transform from a flat state to a three-dimensional ergonomic shape. The bending radius and stretching degree are precisely controlled during manufacturing, enabling consistent reproduction of the ergonomic form while maintaining durability.
2Ease of operation
If complex mesh stretching methods are used, then ergonomic support is improved, but durability decreases
Solution Approach 1:
The sheet is pre-bent and pre-stretched to the desired ergonomic configuration before final assembly. The first and second frames are pre-assembled with the sheet positioned and secured between them, ensuring proper tension and alignment before the covering member is installed. This preliminary preparation ensures durable connections and proper ergonomic form.
Solution Approach 2:
The frame assembly combines the sheet material with the rigid first and second frames, creating a composite structure where each material contributes its strengths. The covering member further composite the assembly, providing additional protection and structural integrity to enhance overall durability.
3Ease of operation
If the sheet is stretched to form ergonomic shape, then comfort is improved, but manufacturing complexity increases
Solution Approach 1:
The sheet is divided into multiple regions with distinct functions: first regions for fixation, second regions for bending, and a third region spanning between openings. This segmentation simplifies the manufacturing process by allowing each region to be treated differently during assembly.
Solution Approach 2:
The first and second frames are nested with the sheet positioned between them, creating a layered structure. The covering member then envelops both frames and the sheet, integrating all components into a unified assembly. This nested arrangement simplifies manufacturing by providing clear assembly sequences.
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 durable and easily manufacturable chair frame assembly that offers ergonomic support by stretching the sheet to form a stable structure, supported by the covering member, ensuring the frames remain connected and providing comfort.
Implementation Method 1
the second regions are bent under combined pressure of the first frame and the second frame
Implementation Method 2
the covering member covers the first frame and the second frame
Data Source
AI summary
A chair includes a frame assembly having a first side and a second side opposite each other. The frame assembly includes a first frame, a second frame, a sheet, and a covering member. The first frame has a first opening facing the first side. The second frame includes two opposite fixing portions and a second opening. The second opening faces the second side and overlaps the first opening in position. The sheet includes two opposite first regions, two opposite second regions located between the first regions, and a third region located between the second regions, the second regions are bent under combined pressure of the first frame and the second frame, and the third region is located between the first opening and the second opening. The covering member covers the first frame and the second frame and exposes the first opening, the second opening, and the third region.