Easy-assembly bed, multipurpose table, and transportation lightweight board
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Solution Overview
Problem
Existing disaster relief beds made of corrugated cardboard lack water resistance and structural integrity when wet, while wooden beds are heavy and difficult to assemble and disassemble efficiently.
Innovation Solution
A lightweight, easy-to-assemble bed featuring a top plate and leg portion made of bonded foam materials with molded resin, providing excellent water resistance and ease of assembly and disassembly through notched joints with molded resin locking grooves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If corrugated cardboard is used for bed construction, then the bed becomes lightweight and easy to transport, but water resistance and structural integrity are lost when exposed to water
Solution Approach 1:
The patent uses plastic corrugated cardboard as a composite material that combines the lightweight properties of corrugated cardboard with the water resistance of plastic. This resolves the contradiction by maintaining light weight while adding water resistance through material composition rather than adding separate protective layers.
2Reliability
If plastic corrugated cardboard is used to improve water resistance, then water resistance increases, but water can still penetrate into the inside of the corrugated cardboard structure
Solution Approach 1:
The patent removes the core from the plastic corrugated cardboard structure, keeping only the flattened outer layers. This extraction eliminates the internal cavity where water could penetrate and accumulate, while maintaining the external water-resistant barrier. The removed core space is replaced with foam material for comfort.
Solution Approach 2:
The patent uses thin plastic film layers as the outer shell of the bed structure. These flexible plastic films provide water resistance while being thin enough to maintain lightweight properties. The plastic shell encloses the foam core, creating a waterproof barrier that prevents water penetration.
3Strength
If wooden beds are used for strength and water resistance, then structural integrity and water resistance are improved, but weight increases making bulk transportation difficult
Solution Approach 1:
The patent changes the material parameters from dense wood to lightweight plastic and foam materials. By adjusting the density and composition parameters, the bed achieves sufficient structural integrity for emergency use while dramatically reducing weight for easy transportation. The plastic frame provides necessary strength without the weight penalty of wood.
Solution Approach 2:
The patent divides the bed into modular components including a frame structure, mattress layers, and bedding accessories. This segmentation allows each component to be optimized for its specific function while maintaining overall lightweight construction. The modular design also facilitates easy assembly and disassembly for transportation.
4Ease of operation
If notched joints are used for easy assembly, then assembly simplicity increases, but structural connectivity and stability decrease causing rattling and component separation
Solution Approach 1:
The patent merges the notched joint connection mechanism with additional locking features and fastening elements. The notched joints are combined with screws, clips, or interlocking mechanisms that prevent component separation while maintaining relative assembly simplicity. This merging of connection methods resolves the contradiction between ease of assembly and structural stability.
Data Source
AI summary
An easy-assembly bed includes a top plate, and a leg portion having a plurality of leg members that are linked using notched joints. The top plate is constituted of a bonded material, which includes a plate-shaped foam plate formed with a foam body, and a front board member and a rear board member having an identical shape to the foam plate and that are bonded to the rear surface and the front surface of the foam plate, respectively, and a top plate molded resin portion overing the cut ends of the bonded material with a molded resin; and the leg members are each constituted of a grooved bonded material, which includes a plate-shaped grooved foam plate having locking grooves and formed with a foam body, and a grooved front board member and a grooved rear board member on the front surface and the rear surface of the grooved foam plate.