Stretch function-added loading sheet, and chair provided herewith
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Solution Overview
Problem
Conventional chairs and loading sheets lack sufficient elasticity and shape conformability, making them uncomfortable and unsuitable for general household use, especially when loading objects or supporting people, as they cannot effectively distribute load and prevent slippage.
Innovation Solution
A stretch function-added loading sheet is introduced, featuring forced crimping units with pinching block plates and a pinching jig that allows the sheet to extend under tension and contract when relaxed, providing elasticity and shape conformability without altering the sheet material's properties, and can be integrated into chair designs as a seating surface or backrest.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a general-purpose sheet with thickness of approximately 1 mm or less is used, then the sheet is flexible and easy to use, but it cannot provide sufficient strength and elasticity to support the weight of a person
Solution Approach 1:
The invention combines a general-purpose sheet with a stretchable material layer to create a composite structure. The stretchable material layer is integrated onto the sheet surface, providing the necessary strength and elasticity while the underlying sheet maintains its flexibility and ease of use. This composite approach allows the loading sheet to support human weight while remaining flexible.
2Device complexity
If a single sheet is used as a container for loading objects, then the structure is simple, but the sheet lacks shape conformability to adapt to variations in shape or location of the object to be loaded
Solution Approach 1:
The invention introduces stretchable material units that can dynamically adjust their shape and size. These units are capable of expanding and contracting, allowing the loading sheet to conform to different object shapes and locations. The stretchable material units act as dynamic elements that adapt the sheet's geometry to match the loaded objects, providing shape conformability while maintaining relatively simple overall structure.
3Ease of manufacture
If conventional sheet materials are used, then the materials are readily available and easy to manufacture, but they lack adequate elasticity and stretchability for comfort when a person is placed thereon
Solution Approach 1:
The invention applies stretchable material units at specific locations where elasticity and comfort are needed, rather than making the entire sheet structure complex. The general-purpose sheet can still be manufactured with readily available materials, while the stretchable material units are strategically positioned to provide comfort and elasticity where persons will be placed, achieving local enhancement of comfort properties.
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 enhances the comfort and usability of chairs by providing necessary elasticity and shape conformability, effectively distributing load and preventing slippage, thereby improving user experience and functionality.
Implementation Method 1
a clip-opening mechanism, which enables an opening/closing action of the opposing two clip side walls by elastic deformation of the material
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2A
AI summary
This stretch function-added loading sheet is provided with one sheet body and an arbitrary number of force crimping units, wherein the force crimping units comprise two clamping block plates and one clamping jig, and on one surface of the sheet main body, the two clamping block plates are fixed on both sides of a folding centerline on the sheet main body. In a state in which the sheet main body is folded along the folding centerline such that the two clamping block plates overlap each other with the sheet main body on the inside, the clamping jig is fixed to the two clamping block plates so as to clamp the two clamping block plates. The stretch function-added loading sheet has a stretch function with which the sheet main body stretches by the clamping jig opening through application of a tensile force perpendicular to the folding centerline to the sheet main body, and shrinks when said tensile force is reduced.