Tool-Free Knockdownable Sofa Using Sakura Bolt Connections
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Solution Overview
Problem
Existing sofas are not knockdownable and require tools for disassembly, leading to difficulties in transportation, packaging, and increased shipping costs due to their permanent construction.
Innovation Solution
A tool-free knockdownable sofa design utilizing sakura bolts and bolt hole plates for assembly and disassembly without tools, featuring a stainless galvanized hollow iron frame, sakura bolts as connecting media, and plastic legs with fine threads, allowing manual assembly and disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a sofa is constructed with permanent assembly using traditional fasteners, then structural strength and stability are improved, but ease of disassembly and transportability deteriorate
Solution Approach 1:
The sofa is divided into multiple separable components including seat modules, backrest modules, and armrest modules that can be independently disconnected. Each module contains standardized connection interfaces with bolt hole plates and sakura bolts, enabling systematic segmentation that maintains structural integrity during use while facilitating easy disassembly for transport.
2Reliability
If a sofa is designed as a permanently-built condition, then manufacturing reliability is improved, but adaptability for different transportation conditions deteriorates
Solution Approach 1:
The sofa transitions from a static permanent structure to a dynamic reconfigurable system. The connection system using sakura bolts and bolt hole plates allows the sofa to adapt between assembled and disassembled states, providing manufacturing reliability when assembled and transportation adaptability when disassembled, thus resolving the contradiction between fixed reliability and flexible adaptability.
3Strength
If a sofa uses traditional assembly methods requiring tools, then connection strength is improved, but ease of assembly by ordinary users deteriorates
Solution Approach 1:
The sakura bolt connection system is designed for self-service assembly by ordinary users without requiring specialized tools or skills. The bolt hole plates provide pre-positioned connection points, and the sakura bolts can be manually inserted and tightened by hand, enabling users to assemble or disassemble the sofa independently while maintaining strong connections through the threaded fastening mechanism.
4Strength
If a sofa is constructed with large volume for structural integrity, then strength and stability are improved, but transportation cost and packaging efficiency deteriorate
Solution Approach 1:
By segmenting the sofa into compact modular components with standardized connection interfaces, the overall volume is reduced when disassembled for transport. Each module maintains its structural integrity through the sakura bolt connection system, allowing the sofa to occupy minimal space during transportation while preserving full structural strength when reassembled at the destination.
Data Source
AI summary
A sofa can be knock-downed without a tool. The sofa includes left and right armrests, a front frame, a seating and a back. The sofa is provided with stowage compartments, each of which is joined by a bolt hole plate located on the frame construction with a bolt connecting medium, and serving as sofa stabilizers are four sofa legs which are placed on at the bottom of the left and right arm frame construction of the sofa.