Convertible Worktable Fastener Layout for Sturdy Tool-Free Assembly

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Solution Overview

Problem

Conventional convertible worktables lack the ability to be both sturdy and easily switchable between an assembled use configuration and a compact storage configuration without the use of tools, often being limited in size, stability, or requiring complex assembly.

Innovation Solution

A convertible worktable design featuring a top frame unit with a planar tabletop, a bottom frame unit, and a fastener assembly that allows the legs to be detachably fastened and reconfigured between an assembled use configuration and a storage configuration, utilizing predrilled holes and coarse threaded hex bolts with wingnuts and washers for secure attachment and detachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If conventional convertible worktables are designed for portability and easy assembly, then ease of operation is improved, but structural stability and strength deteriorate

Engineering Contradiction:
Improveease of assemblyVSAvoidstructural stability
Core Design Contradiction:
Ease of operationVSStrength

Solution Approach 1:

The worktable is divided into separate modular components including a top frame unit, bottom frame unit, and legs that can be independently assembled and disassembled. The fastener assembly further segments the connection system into removable fasteners that secure legs to frames, enabling tool-free assembly while maintaining structural integrity through precise alignment features and interlocking geometry

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The bottom frame unit is designed to nest within the top frame unit when the worktable is in storage configuration. The legs nest between the frames, and the entire assembly compactly folds into a space-efficient configuration that maintains component protection and structural readiness for rapid reassembly

Inventive Principle:
Principle #7Nested doll (Nesting)

2Adaptability or versatility

If the worktable is designed to be completely dismantled for storage, then portability is improved, but reliability deteriorates

Engineering Contradiction:
ImproveportabilityVSAvoidstructural integrity
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

Fastening holes are pre-drilled and pre-positioned in the frames and legs during manufacturing, eliminating the need for complex alignment during assembly. The pre-configured hole patterns ensure precise component alignment and consistent structural integrity across multiple assembly cycles, while the removable fastener design enables complete dismantling for portability

Inventive Principle:
Principle #10Preliminary action

3Adaptability or versatility

If the worktable uses multiple parts and complex assembly mechanisms, then adaptability is improved, but device complexity increases

Engineering Contradiction:
ImproveconvertibilityVSAvoidnumber of parts
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The fastener assembly serves multiple functions: it secures legs to the top frame, secures the bottom frame to legs, and enables tool-free assembly and disassembly. The alignment features and fastening holes are universally positioned to work with all components, reducing the need for specialized parts while maintaining full convertibility between assembled and storage configurations

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS11420318B1Sturdy convertible worktable
Publication Date: 2022.08.23 HARRIS WILLIAM GEOFFREY
  • US11420318B1 patent drawing
  • US11420318B1 patent drawing
  • US11420318B1 patent drawing

AI summary

The present invention discloses a convertible worktable convertible between a storage configuration and an assembled use configuration. The worktable comprises a tabletop has a top surface and a bottom surface, a top frame fixed to the bottom surface of the tabletop and a bottom frame being spaced apart and coaxial to the top frame. The bottom frame having a first side and a second side opposite to the first side. The worktable further comprises a plurality of legs fastened to the top frame and extends beyond and in contact with the bottom frame. A fastener assembly detachably fastens the plurality of legs to the top frame and the bottom frame and defines an assembled use configuration. The fastener assembly allows detachment of the plurality of legs from the top and bottom frame, fastens the plurality of legs and the bottom frame alongside the top frame, and defines a storage configuration.