Threaded Table Leg Assembly for Low-Cost Detachable Furniture
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Solution Overview
Problem
Existing tables with combined and upstanding legs have complex configurations and high manufacturing costs due to the use of ball screws, making assembly and disassembly inconvenient.
Innovation Solution
A table design featuring screw thread connections between the tabletop and legs, with non-circular inserted parts for tool rotation, and a composite tabletop structure including a top plate, bottom plate, and honeycomb core for strength and ease of assembly, using embedded nuts and bolts for secure and detachable connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ball screw is used to connect legs with tabletop, then connection reliability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts the ball screw mechanism from the leg connection system and replaces it with a simple screw thread connection. The leg pipe directly threads into the connecting position on the tabletop underside, eliminating the intermediate ball screw component while maintaining secure connection functionality.
Solution Approach 2:
The patent employs standard screw thread connections instead of expensive ball screws. The connecting position includes a screw thread hole that receives a regular screw, which is a low-cost, readily available fastening mechanism that provides sufficient reliability for the application without the complexity of ball screws.
2Reliability
If ball screw is used to connect legs with tabletop, then connection reliability is improved, but assembly and disassembly convenience deteriorates
Solution Approach 1:
The patent removes the ball screw mechanism that complicated assembly operations. The leg pipe with external screw thread directly engages with the screw thread hole in the tabletop connecting position, allowing for simple manual or tool-assisted threading and secure attachment without the multi-step assembly required by ball screws.
Solution Approach 2:
Instead of using a ball screw that requires complex assembly procedures, the patent inverts the approach by using a simple screw thread connection where the leg pipe itself provides the threading interface. This reversal of the connection mechanism fundamentally simplifies the assembly and disassembly process while maintaining reliable attachment.
3Adaptability or versatility
If ball screw is used in leg structure, then adjustment capability is improved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive ball screws with inexpensive standard screw threads. The leg pipe incorporates an external screw thread that mates with the screw thread hole in the tabletop connecting position. This low-cost fastening method provides sufficient adjustability and secure attachment without the high manufacturing cost of ball screw components.
Solution Approach 2:
The patent extracts the ball screw adjustment mechanism and replaces it with a simple screw thread connection system. The leg pipe's external thread engages with the tabletop's internal thread, providing a cost-effective solution that maintains the necessary adaptability for leg attachment and height adjustment without complex machinery.
Data Source
AI summary
A table including a tabletop and numbers of legs. A number of connecting positions for connecting with the legs are arranged in a bottom surface of the tabletop. The legs are connected with the connecting positions and extend transversely from the tabletop. The connecting positions and the upper ends of the legs are connected together by screw threads. Each of the legs include a recessed tool receptacle for receiving a tool to rotate the legs.