Toggle Latch Furniture Joint for Tool-Free Tube Assembly

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Solution Overview

Problem

Assembling furniture pieces can be time-consuming, requires tools and skills, and is intimidating for non-handy consumers, especially when using bolts and nuts.

Innovation Solution

A modular furniture system using toggle latches and pins, where the toggle latches are detachably attached to hollow structural tubes via base plates or fasteners, and pins securely couple panels together, allowing easy assembly without complex tools.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional fastening methods (hex keys, bolts, nuts) are used to assemble furniture, then structural integrity is achieved, but assembly complexity and time consumption increase significantly

Engineering Contradiction:
Improvestructural integrityVSAvoidassembly complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts and eliminates the need for multiple fastening components (hex keys, bolts, nuts, washers) by replacing them with a single integrated toggle latch mechanism. This removes the complexity of coordinating multiple tools and parts while maintaining structural integrity through the toggle latch's secure engagement system.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent merges multiple fastening functions into a single toggle latch component that combines the securing, locking, and fastening actions previously requiring separate bolts, nuts, and keys. The toggle latch integrates the catch arm, pivot point, and engagement mechanism into one unified device that simplifies the assembly process.

Inventive Principle:
Principle #5Merging (Combining)

2Reliability

If traditional fastening methods are used, then secure connection is achieved, but the number of tools and components required increases

Engineering Contradiction:
Improveconnection securityVSAvoidnumber of components
Core Design Contradiction:
ReliabilityVSQuantity of substance

Solution Approach 1:

The toggle latch serves multiple functions simultaneously: it acts as a securing mechanism, a locking device, and a fastening component all in one. The single component design replaces the traditional multi-component fastening system (bolts, nuts, washers, keys) while maintaining secure connections through its toggle engagement mechanism that provides reliable locking.

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

Solution Approach 2:

The patent removes unnecessary components from the traditional fastening system, eliminating hex keys, separate bolts, nuts, and washers. Only the essential toggle latch and pin remain, reducing the quantity of components while preserving connection security through the latch's inherent locking capability.

Inventive Principle:
Principle #2Taking out (Extraction)

3Loss of information

If traditional assembly instructions are provided, then complete assembly information is given, but user comprehension and ease of use decrease

Engineering Contradiction:
Improveassembly information completenessVSAvoiduser comprehension
Core Design Contradiction:
Loss of informationVSEase of operation

Solution Approach 1:

The toggle latch mechanism is designed to be self-explanatory and self-guiding during assembly. The natural motion of the catch arm pivoting and the visual feedback of the toggle engagement provide intuitive cues that guide users through the assembly process without requiring complex written or graphical instructions. The mechanism itself communicates its function through its design.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

While not explicitly using color changes, the patent employs visual feedback through the mechanical movement and positioning of components. The toggle latch's engagement state is visually apparent, providing immediate feedback to users about whether components are properly assembled, eliminating the need for lengthy instructional text.

Inventive Principle:
Principle #32Color changes

4Stability of the object's composition

If precise fastening with multiple components is used, then structural stability is ensured, but assembly time increases

Engineering Contradiction:
Improvestructural stabilityVSAvoidassembly time
Core Design Contradiction:
Stability of the object's compositionVSLoss of time

Solution Approach 1:

The toggle latch is pre-configured with its pivot point and catch arm geometry designed to naturally guide the assembly process. The structural tubes have pre-positioned holes that align with the latch mechanism, allowing users to simply insert and toggle the latch without requiring precise measurement or alignment adjustments during assembly, thus reducing assembly time while maintaining stability.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent segments the furniture into modular components (structural tubes with designated holes) that are designed to work specifically with the toggle latch system. This segmentation allows for quick connection and disconnection of furniture parts while ensuring structural stability through the engineered interface between the tubes and latch mechanism.

Inventive Principle:
Principle #1Segmentation

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Facilitates quick and secure assembly of furniture by consumers, reducing the need for specialized tools and simplifying the assembly process.

Implementation Method 1

the catch arm can be an arc-spring

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentUS12607215B2Clamping lock
Publication Date: 2026.04.21 AMATIS CONTROLS LLC
  • US12607215B2 patent drawing
  • US12607215B2 patent drawing
  • US12607215B2 patent drawing

AI summary

A modular furniture quick assembly system implementing toggle latches and pins to couple two adjacent structural tubes together. The toggle latch has a catch arm that engages with the pin. The pin is inserted at least partially through one or both of the adjacent structural tubes.