Adjustable Sheet Assembly Chair for Multi-Age Comfort
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Solution Overview
Problem
Conventional assembly chairs are not suitable for all ages due to material hardness, lack of adjustability, and require multiple sheets for different uses, making them cumbersome to assemble and use.
Innovation Solution
An assembly chair design featuring a pair of frames with linear and curved side portions, coupling rods, depressed portions, and a sheet with adjustable length, allowing for easy conversion between chair types and accommodating various user ages with a single sheet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the backrest plate and seat plate are made of hard material such as wood and plastic, then the structural strength is improved, but the comfort for babies who do not have sufficient control over their necks and waists deteriorates
Solution Approach 1:
The patent changes the material parameter from hard materials (wood, plastic) to soft and flexible materials that can provide both structural support and comfort for babies with insufficient neck and waist control
Solution Approach 2:
The patent uses composite material construction where the sheet includes a soft cushioning layer combined with a supportive framework, achieving both strength and baby-friendly comfort characteristics
2Adaptability or versatility
If multiple sheets with different lengths are prepared according to usage, then the adaptability for different users is improved, but the device complexity and number of parts increases
Solution Approach 1:
The patent designs a universal sheet structure that can serve multiple functions and accommodate different users (babies, children, adults) through a single adjustable sheet rather than requiring multiple different sheets
Solution Approach 2:
The patent implements an adjustable sheet length mechanism that allows the sheet to be dynamically reconfigured for different usage scenarios and user sizes, transforming a static multi-sheet system into a dynamic single-sheet system
3Adaptability or versatility
If the sheet length is changed according to usage by passing support rods through tubular portions and winding the sheet around support rods, then the adaptability is improved, but the ease of operation deteriorates due to the bothered work required
Solution Approach 1:
The patent segments the sheet into modular sections with standardized connection points, allowing simple attachment and detachment without complex winding and securing operations
Solution Approach 2:
The patent introduces simplified intermediary components (such as clips, fasteners, or guide rails) that mediate between the sheet and support structure, eliminating the need for manual winding and securing operations
Data Source
AI summary
The assembly chair includes a pair of frames, a plurality of coupling rods, a plurality of pairs of depressed portions, at least one support member, and a sheet. The sheet is removably installed between the support member and the coupling rod. At least at one end portion of the sheet, the sheet includes a plurality of inserted portions along a width direction of the sheet. A flat plate is passed through at least one of the inserted portions. The support member with a flat intermediate portion is passed through another one of the inserted portions. The sheet is wound around outer peripheries of the inserted portion through which the plate is passed and the inserted portion through which the support member is passed to adjust a length of the sheet. In such state, the support member has both end portions fitted to the depressed portions on the frames.