Concealed Chair Fastening Structure for Simpler Assembly
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Solution Overview
Problem
Conventional chair assembly methods are complex, time-consuming, and costly, with screws compromising the appearance by visible fastening, necessitating a simpler and more cost-effective solution for manufacturing and transportation.
Innovation Solution
The chair assembly features a frame with two foot frames and back supports, utilizing an upper rod with a supporting rib, a transverse shaft, and pin holes with slots for fastening components, allowing for a tidy appearance without visible fastening through a simpler assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional assembly methods using multiple screws are used, then the chair parts are securely fastened, but the assembly process becomes complicated and time-consuming
Solution Approach 1:
The patent integrates multiple fastening functions into a single integrated fastening component that combines a screw, washer, and positioning features into one element. This merging reduces the number of separate fastening components needed while maintaining secure attachment between chair parts.
Solution Approach 2:
The fastening component is designed with segmented functional zones including a threaded portion for screwing, a washer portion for distribution, and positioning ribs for alignment. This segmentation of functions within a single component simplifies the overall assembly process while ensuring reliable fastening.
2Reliability
If multiple screws are used for assembly, then the chair parts are securely fastened, but the manufacturing and transportation costs increase
Solution Approach 1:
By combining multiple fastening elements into one integrated component, the patent reduces the total number of parts that need to be manufactured, inventoried, and transported. This merging directly lowers manufacturing and transportation costs while maintaining fastening security.
3Reliability
If multiple screws are used for assembly, then the chair parts are securely fastened, but the chair appearance is compromised due to visible fastening
Solution Approach 1:
The integrated fastening component is designed to be nested within or concealed by the chair structure, with positioning ribs that fit into corresponding slots. This nesting approach hides the fastening mechanism from view while maintaining secure attachment, thus preserving appearance quality.
4Reliability
If conventional assembly with multiple screws is used, then the chair is securely assembled, but the assembly time increases
Solution Approach 1:
The fastening component's segmented design with integrated positioning ribs and threading allows for one-step insertion and securing. This eliminates the need for multiple separate fastening operations, significantly reducing assembly time while maintaining secure attachment.
Data Source
AI summary
A chair assembly includes a frame, seat, and a back. The frame has two foot frames and two back supports. The foot frame has an upper rod, and an extending supporting rib is formed to the upper rod. The back support has an assembling sheet. The seat has a cut for receiving the upper rod of the foot frame on two lateral sides thereof, and the rear side of the seat also has a cut for receiving the transverse shaft of the frame. The back has two pin holes on two lateral sides of the bottom thereof for receiving the back supports of the frame, and the pin hole has a slot for receiving the assembling sheet of the back support. The seat is fixed to the frame, and the back is fixed to the frame through the assembling sheet of the back support with two fastening components.