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Solution Overview
Problem
Conventional office chairs with a support structure that moves the seat rearward upon tilting the backrest require a larger size, occupying space below the seat and compromising design quality.
Innovation Solution
A chair design featuring a support structure with multiple shafts and a support link system that allows the seat to move rearward while minimizing the structure's size, including a first shaft portion, a second shaft portion, a third shaft portion, and a fourth shaft portion, with the support link positioned behind the first and third shaft portions, allowing the seat to move rearward without increasing the overall size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the support structure is designed to move the seat rearward when the backrest is tilted, then the chair provides functional comfort, but the support structure increases in size in the front-rear direction, occupying space below the seat and reducing design quality
Solution Approach 1:
The support link is repositioned from a conventional forward position to a rearward position behind the first and third shaft portions. This spatial reconfiguration in the front-rear dimension allows the support structure to achieve the necessary mechanical leverage for seat movement while minimizing its forward protrusion, thereby reducing the occupied space below the seat and improving design quality
2Stability of the object's composition
If the support link is positioned forward to provide adequate support, then the structural stability is improved, but the overall size of the support structure increases, reducing the space below the seat
Solution Approach 1:
The support link is repositioned to extend rearward behind the shaft portions rather than forward. This dimensional change in positioning allows the support structure to maintain adequate stability through proper mechanical arrangement while significantly reducing the volume occupied in the space below the seat, thereby resolving the contradiction between stability and space utilization
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 design secures a large space below the seat and enhances the chair's design quality by reducing the visible size of the support structure, while maintaining the functionality of seat movement in conjunction with backrest tilting.
Implementation Method 1
a first shaft portion extending in a first direction intersecting the vertical direction and rotatably supporting the seat
Data Source
AI summary
The chair of the present invention includes a seat, a backrest, and a support structure supporting the seat and the backrest. The backrest includes an arm portion and a back support portion. The support structure includes a first shaft portion, a second shaft portion, a third shaft portion, a fourth shaft portion, a support base, an arm support portion, and a support link.