Seat frame
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Solution Overview
Problem
Existing zero-gravity experience seat frames often cause dizziness in users due to rapid changes in seat frame angles, which can be counterproductive and reduce comfort.
Innovation Solution
A leg-lift zero-gravity experience seat frame design that includes a base, a driving member, and a stretching member with backrest assemblies, cushion support assemblies, and leg rest plate assemblies. This design allows the leg rest plate frame to be inclined upward, increasing the angle of the leg unit and foot rest plate without significantly increasing the seat frame angle change, thereby providing a weightlessness experience without dizziness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the seat frame angle is increased to achieve zero-gravity effect, then weightlessness experience is improved, but user comfort deteriorates due to dizziness caused by rapid angle changes
Solution Approach 1:
The seat frame is divided into multiple independently adjustable components: backrest assembly, seat pan assembly, and leg rest assembly. Each component can be adjusted separately to achieve gradual posture transitions, avoiding sudden overall angle changes that cause dizziness while still achieving the desired weightlessness effect.
Solution Approach 2:
The seat frame employs dynamic adjustment mechanisms that allow continuous and gradual modification of各 component angles. The backrest, seat pan, and leg rest can be adjusted to different positions according to user needs, enabling smooth transitions between sitting, reclining, and zero-gravity postures without abrupt angle changes.
2Adaptability or versatility
If the seat frame angle is increased beyond 18° to enhance zero-gravity effect, then weightlessness is improved, but user adaptability deteriorates due to difficulty in adapting to rapid angle changes
Solution Approach 1:
The overall seat frame adjustment is segmented into three independent adjustment systems (backrest, seat pan, leg rest). This allows users to adjust each component separately at their own pace, improving adaptability while achieving the desired weightlessness posture.
Solution Approach 2:
The leg rest assembly is designed to be adjustable independently and can be positioned in advance to prepare for the zero-gravity posture. This preliminary adjustment of the leg rest helps users adapt gradually to the changing posture before full reclining occurs.
3Ease of manufacture
If the seat frame structure is simplified for ease of manufacture, then manufacturing cost is reduced, but functional versatility deteriorates due to inability to achieve zero-gravity effect
Solution Approach 1:
The seat frame is divided into modular assemblies (backrest assembly, seat pan assembly, leg rest assembly) that can be manufactured separately using standard production processes. This segmentation maintains manufacturing simplicity while enabling complex multi-position adjustment functionality for zero-gravity effect.
Solution Approach 2:
Each modular assembly is designed with universal adjustment mechanisms that can achieve multiple positions and angles. The backrest, seat pan, and leg rest can each be adjusted to different positions, providing versatile zero-gravity functionality without requiring complex specialized structures.
Data Source
AI summary
A seat frame includes a base, a driving member and a stretching member. The driving member and the stretching member are disposed on the base. The stretching member includes backrest assemblies, cushion support assemblies and leg rest plate assemblies which are positioned on left and right sides of the base and set in pairs. A front end and a rear end of the cushion support assembly are hinged with one end of the backrest assembly and one end of the leg rest plate assembly respectively. When the seat frame is in a television (TV) posture and a lying posture, and the leg rest plate frame is inclined upward with respect to a horizontal plane.